Merge pull request #504 from murgatroid99/node_new_core_api

Rewrite the Node library to use the new core call API

29 files changed, 1655 insertions, 2249 deletions

diff --git a/src/node/binding.gyp b/src/node/binding.gyp
index cf2a6acb04..fb4c779f8e 100644
--- a/src/node/binding.gyp
+++ b/src/node/binding.gyp
@@ -9,14 +9,15 @@
       'include_dirs': [
         "<!(nodejs -e \"require('nan')\")"
       ],
-      'cxxflags': [
+      'cflags': [
+        '-std=c++11',
         '-Wall',
         '-pthread',
         '-pedantic',
         '-g',
         '-zdefs'
-        '-Werror',
-        ],
+        '-Werror'
+      ],
       'ldflags': [
         '-g'
       ],
@@ -33,11 +34,9 @@
         "ext/channel.cc",
         "ext/completion_queue_async_worker.cc",
         "ext/credentials.cc",
-        "ext/event.cc",
         "ext/node_grpc.cc",
         "ext/server.cc",
         "ext/server_credentials.cc",
-        "ext/tag.cc",
         "ext/timeval.cc"
       ],
       'conditions' : [
diff --git a/src/node/ext/call.cc b/src/node/ext/call.cc
index 23aead07b2..9ed389f3bc 100644
--- a/src/node/ext/call.cc
+++ b/src/node/ext/call.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2014, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,17 +31,25 @@
  *
  */
 
+#include <memory>
+#include <vector>
+#include <map>
+
 #include <node.h>
 
 #include "grpc/support/log.h"
 #include "grpc/grpc.h"
+#include "grpc/support/alloc.h"
 #include "grpc/support/time.h"
 #include "byte_buffer.h"
 #include "call.h"
 #include "channel.h"
 #include "completion_queue_async_worker.h"
 #include "timeval.h"
-#include "tag.h"
+
+using std::unique_ptr;
+using std::shared_ptr;
+using std::vector;
 
 namespace grpc {
 namespace node {
@@ -49,6 +57,7 @@ namespace node {
 using ::node::Buffer;
 using v8::Arguments;
 using v8::Array;
+using v8::Boolean;
 using v8::Exception;
 using v8::External;
 using v8::Function;
@@ -68,37 +77,372 @@ using v8::Value;
 Persistent<Function> Call::constructor;
 Persistent<FunctionTemplate> Call::fun_tpl;
 
-Call::Call(grpc_call *call) : wrapped_call(call) {}
 
-Call::~Call() { grpc_call_destroy(wrapped_call); }
+bool CreateMetadataArray(Handle<Object> metadata, grpc_metadata_array *array,
+                         shared_ptr<Resources> resources) {
+  NanScope();
+  grpc_metadata_array_init(array);
+  Handle<Array> keys(metadata->GetOwnPropertyNames());
+  for (unsigned int i = 0; i < keys->Length(); i++) {
+    Handle<String> current_key(keys->Get(i)->ToString());
+    if (!metadata->Get(current_key)->IsArray()) {
+      return false;
+    }
+    array->capacity += Local<Array>::Cast(metadata->Get(current_key))->Length();
+  }
+  array->metadata = reinterpret_cast<grpc_metadata*>(
+      gpr_malloc(array->capacity * sizeof(grpc_metadata)));
+  for (unsigned int i = 0; i < keys->Length(); i++) {
+    Handle<String> current_key(keys->Get(i)->ToString());
+    NanUtf8String *utf8_key = new NanUtf8String(current_key);
+    resources->strings.push_back(unique_ptr<NanUtf8String>(utf8_key));
+    Handle<Array> values = Local<Array>::Cast(metadata->Get(current_key));
+    for (unsigned int j = 0; j < values->Length(); j++) {
+      Handle<Value> value = values->Get(j);
+      grpc_metadata *current = &array->metadata[array->count];
+      current->key = **utf8_key;
+      if (Buffer::HasInstance(value)) {
+        current->value = Buffer::Data(value);
+        current->value_length = Buffer::Length(value);
+        Persistent<Value> handle;
+        NanAssignPersistent(handle, value);
+        resources->handles.push_back(unique_ptr<PersistentHolder>(
+            new PersistentHolder(handle)));
+      } else if (value->IsString()) {
+        Handle<String> string_value = value->ToString();
+        NanUtf8String *utf8_value = new NanUtf8String(string_value);
+        resources->strings.push_back(unique_ptr<NanUtf8String>(utf8_value));
+        current->value = **utf8_value;
+        current->value_length = string_value->Length();
+      } else {
+        return false;
+      }
+      array->count += 1;
+    }
+  }
+  return true;
+}
+
+Handle<Value> ParseMetadata(const grpc_metadata_array *metadata_array) {
+  NanEscapableScope();
+  grpc_metadata *metadata_elements = metadata_array->metadata;
+  size_t length = metadata_array->count;
+  std::map<const char*, size_t> size_map;
+  std::map<const char*, size_t> index_map;
+
+  for (unsigned int i = 0; i < length; i++) {
+    const char *key = metadata_elements[i].key;
+    if (size_map.count(key)) {
+      size_map[key] += 1;
+    }
+    index_map[key] = 0;
+  }
+  Handle<Object> metadata_object = NanNew<Object>();
+  for (unsigned int i = 0; i < length; i++) {
+    grpc_metadata* elem = &metadata_elements[i];
+    Handle<String> key_string = String::New(elem->key);
+    Handle<Array> array;
+    if (metadata_object->Has(key_string)) {
+      array = Handle<Array>::Cast(metadata_object->Get(key_string));
+    } else {
+      array = NanNew<Array>(size_map[elem->key]);
+      metadata_object->Set(key_string, array);
+    }
+    array->Set(index_map[elem->key],
+               MakeFastBuffer(
+                   NanNewBufferHandle(elem->value, elem->value_length)));
+    index_map[elem->key] += 1;
+  }
+  return NanEscapeScope(metadata_object);
+}
+
+Handle<Value> Op::GetOpType() const {
+  NanEscapableScope();
+  return NanEscapeScope(NanNew<String>(GetTypeString()));
+}
+
+class SendMetadataOp : public Op {
+ public:
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    return NanEscapeScope(NanTrue());
+  }
+  bool ParseOp(Handle<Value> value, grpc_op *out,
+               shared_ptr<Resources> resources) {
+    if (!value->IsObject()) {
+      return false;
+    }
+    grpc_metadata_array array;
+    if (!CreateMetadataArray(value->ToObject(), &array, resources)) {
+      return false;
+    }
+    out->data.send_initial_metadata.count = array.count;
+    out->data.send_initial_metadata.metadata = array.metadata;
+    return true;
+  }
+ protected:
+  std::string GetTypeString() const {
+    return "send metadata";
+  }
+};
+
+class SendMessageOp : public Op {
+ public:
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    return NanEscapeScope(NanTrue());
+  }
+  bool ParseOp(Handle<Value> value, grpc_op *out,
+               shared_ptr<Resources> resources) {
+    if (!Buffer::HasInstance(value)) {
+      return false;
+    }
+    out->data.send_message = BufferToByteBuffer(value);
+    Persistent<Value> handle;
+    NanAssignPersistent(handle, value);
+    resources->handles.push_back(unique_ptr<PersistentHolder>(
+        new PersistentHolder(handle)));
+    return true;
+  }
+ protected:
+  std::string GetTypeString() const {
+    return "send message";
+  }
+};
+
+class SendClientCloseOp : public Op {
+ public:
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    return NanEscapeScope(NanTrue());
+  }
+  bool ParseOp(Handle<Value> value, grpc_op *out,
+               shared_ptr<Resources> resources) {
+    return true;
+  }
+ protected:
+  std::string GetTypeString() const {
+    return "client close";
+  }
+};
+
+class SendServerStatusOp : public Op {
+ public:
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    return NanEscapeScope(NanTrue());
+  }
+  bool ParseOp(Handle<Value> value, grpc_op *out,
+               shared_ptr<Resources> resources) {
+    if (!value->IsObject()) {
+      return false;
+    }
+    Handle<Object> server_status = value->ToObject();
+    if (!server_status->Get(NanNew("metadata"))->IsObject()) {
+      return false;
+    }
+    if (!server_status->Get(NanNew("code"))->IsUint32()) {
+      return false;
+    }
+    if (!server_status->Get(NanNew("details"))->IsString()) {
+      return false;
+    }
+    grpc_metadata_array array;
+    if (!CreateMetadataArray(server_status->Get(NanNew("metadata"))->
+                             ToObject(),
+                             &array, resources)) {
+      return false;
+    }
+    out->data.send_status_from_server.trailing_metadata_count = array.count;
+    out->data.send_status_from_server.trailing_metadata = array.metadata;
+    out->data.send_status_from_server.status =
+        static_cast<grpc_status_code>(
+            server_status->Get(NanNew("code"))->Uint32Value());
+    NanUtf8String *str = new NanUtf8String(
+        server_status->Get(NanNew("details")));
+    resources->strings.push_back(unique_ptr<NanUtf8String>(str));
+    out->data.send_status_from_server.status_details = **str;
+    return true;
+  }
+ protected:
+  std::string GetTypeString() const {
+    return "send status";
+  }
+};
+
+class GetMetadataOp : public Op {
+ public:
+  GetMetadataOp() {
+    grpc_metadata_array_init(&recv_metadata);
+  }
+
+  ~GetMetadataOp() {
+    grpc_metadata_array_destroy(&recv_metadata);
+  }
+
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    return NanEscapeScope(ParseMetadata(&recv_metadata));
+  }
+
+  bool ParseOp(Handle<Value> value, grpc_op *out,
+               shared_ptr<Resources> resources) {
+    out->data.recv_initial_metadata = &recv_metadata;
+    return true;
+  }
+
+ protected:
+  std::string GetTypeString() const {
+    return "metadata";
+  }
+
+ private:
+  grpc_metadata_array recv_metadata;
+};
+
+class ReadMessageOp : public Op {
+ public:
+  ReadMessageOp() {
+    recv_message = NULL;
+  }
+  ~ReadMessageOp() {
+    if (recv_message != NULL) {
+      gpr_free(recv_message);
+    }
+  }
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    return NanEscapeScope(ByteBufferToBuffer(recv_message));
+  }
+
+  bool ParseOp(Handle<Value> value, grpc_op *out,
+               shared_ptr<Resources> resources) {
+    out->data.recv_message = &recv_message;
+    return true;
+  }
+
+ protected:
+  std::string GetTypeString() const {
+    return "read";
+  }
+
+ private:
+  grpc_byte_buffer *recv_message;
+};
+
+class ClientStatusOp : public Op {
+ public:
+  ClientStatusOp() {
+    grpc_metadata_array_init(&metadata_array);
+    status_details = NULL;
+    details_capacity = 0;
+  }
+
+  ~ClientStatusOp() {
+    grpc_metadata_array_destroy(&metadata_array);
+    gpr_free(status_details);
+  }
+
+  bool ParseOp(Handle<Value> value, grpc_op *out,
+               shared_ptr<Resources> resources) {
+    out->data.recv_status_on_client.trailing_metadata = &metadata_array;
+    out->data.recv_status_on_client.status = &status;
+    out->data.recv_status_on_client.status_details = &status_details;
+    out->data.recv_status_on_client.status_details_capacity = &details_capacity;
+    return true;
+  }
+
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    Handle<Object> status_obj = NanNew<Object>();
+    status_obj->Set(NanNew("code"), NanNew<Number>(status));
+    if (status_details != NULL) {
+      status_obj->Set(NanNew("details"), String::New(status_details));
+    }
+    status_obj->Set(NanNew("metadata"), ParseMetadata(&metadata_array));
+    return NanEscapeScope(status_obj);
+  }
+ protected:
+  std::string GetTypeString() const {
+    return "status";
+  }
+ private:
+  grpc_metadata_array metadata_array;
+  grpc_status_code status;
+  char *status_details;
+  size_t details_capacity;
+};
+
+class ServerCloseResponseOp : public Op {
+ public:
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    return NanEscapeScope(NanNew<Boolean>(cancelled));
+  }
+
+  bool ParseOp(Handle<Value> value, grpc_op *out,
+               shared_ptr<Resources> resources) {
+    out->data.recv_close_on_server.cancelled = &cancelled;
+    return true;
+  }
+
+ protected:
+  std::string GetTypeString() const {
+    return "cancelled";
+  }
+
+ private:
+  int cancelled;
+};
+
+tag::tag(NanCallback *callback, OpVec *ops,
+         shared_ptr<Resources> resources) :
+    callback(callback), ops(ops), resources(resources){
+}
+
+tag::~tag() {
+  delete callback;
+  delete ops;
+}
+
+Handle<Value> GetTagNodeValue(void *tag) {
+  NanEscapableScope();
+  struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
+  Handle<Object> tag_obj = NanNew<Object>();
+  for (vector<unique_ptr<Op> >::iterator it = tag_struct->ops->begin();
+       it != tag_struct->ops->end(); ++it) {
+    Op *op_ptr = it->get();
+    tag_obj->Set(op_ptr->GetOpType(), op_ptr->GetNodeValue());
+  }
+  return NanEscapeScope(tag_obj);
+}
+
+NanCallback *GetTagCallback(void *tag) {
+  struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
+  return tag_struct->callback;
+}
+
+void DestroyTag(void *tag) {
+  struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
+  delete tag_struct;
+}
+
+Call::Call(grpc_call *call) : wrapped_call(call) {
+}
+
+Call::~Call() {
+  grpc_call_destroy(wrapped_call);
+}
 
 void Call::Init(Handle<Object> exports) {
   NanScope();
   Local<FunctionTemplate> tpl = FunctionTemplate::New(New);
   tpl->SetClassName(NanNew("Call"));
   tpl->InstanceTemplate()->SetInternalFieldCount(1);
-  NanSetPrototypeTemplate(tpl, "addMetadata",
-                          FunctionTemplate::New(AddMetadata)->GetFunction());
-  NanSetPrototypeTemplate(tpl, "invoke",
-                          FunctionTemplate::New(Invoke)->GetFunction());
-  NanSetPrototypeTemplate(tpl, "serverAccept",
-                          FunctionTemplate::New(ServerAccept)->GetFunction());
-  NanSetPrototypeTemplate(
-      tpl, "serverEndInitialMetadata",
-      FunctionTemplate::New(ServerEndInitialMetadata)->GetFunction());
+  NanSetPrototypeTemplate(tpl, "startBatch",
+                          FunctionTemplate::New(StartBatch)->GetFunction());
   NanSetPrototypeTemplate(tpl, "cancel",
                           FunctionTemplate::New(Cancel)->GetFunction());
-  NanSetPrototypeTemplate(tpl, "startWrite",
-                          FunctionTemplate::New(StartWrite)->GetFunction());
-  NanSetPrototypeTemplate(
-      tpl, "startWriteStatus",
-      FunctionTemplate::New(StartWriteStatus)->GetFunction());
-  NanSetPrototypeTemplate(tpl, "writesDone",
-                          FunctionTemplate::New(WritesDone)->GetFunction());
-  NanSetPrototypeTemplate(tpl, "startReadMetadata",
-                          FunctionTemplate::New(WritesDone)->GetFunction());
-  NanSetPrototypeTemplate(tpl, "startRead",
-                          FunctionTemplate::New(StartRead)->GetFunction());
   NanAssignPersistent(fun_tpl, tpl);
   NanAssignPersistent(constructor, tpl->GetFunction());
   constructor->Set(NanNew("WRITE_BUFFER_HINT"),
@@ -152,9 +496,9 @@ NAN_METHOD(Call::New) {
       NanUtf8String method(args[1]);
       double deadline = args[2]->NumberValue();
       grpc_channel *wrapped_channel = channel->GetWrappedChannel();
-      grpc_call *wrapped_call = grpc_channel_create_call_old(
-          wrapped_channel, *method, channel->GetHost(),
-          MillisecondsToTimespec(deadline));
+      grpc_call *wrapped_call = grpc_channel_create_call(
+          wrapped_channel, CompletionQueueAsyncWorker::GetQueue(), *method,
+          channel->GetHost(), MillisecondsToTimespec(deadline));
       call = new Call(wrapped_call);
       args.This()->SetHiddenValue(String::NewSymbol("channel_"),
                                   channel_object);
@@ -168,119 +512,74 @@ NAN_METHOD(Call::New) {
   }
 }
 
-NAN_METHOD(Call::AddMetadata) {
+NAN_METHOD(Call::StartBatch) {
   NanScope();
   if (!HasInstance(args.This())) {
-    return NanThrowTypeError("addMetadata can only be called on Call objects");
+    return NanThrowTypeError("startBatch can only be called on Call objects");
   }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
   if (!args[0]->IsObject()) {
-    return NanThrowTypeError("addMetadata's first argument must be an object");
-  }
-  Handle<Object> metadata = args[0]->ToObject();
-  Handle<Array> keys(metadata->GetOwnPropertyNames());
-  for (unsigned int i = 0; i < keys->Length(); i++) {
-    Handle<String> current_key(keys->Get(i)->ToString());
-    if (!metadata->Get(current_key)->IsArray()) {
-      return NanThrowTypeError(
-          "addMetadata's first argument's values must be arrays");
-    }
-    NanUtf8String utf8_key(current_key);
-    Handle<Array> values = Local<Array>::Cast(metadata->Get(current_key));
-    for (unsigned int j = 0; j < values->Length(); j++) {
-      Handle<Value> value = values->Get(j);
-      grpc_metadata metadata;
-      grpc_call_error error;
-      metadata.key = *utf8_key;
-      if (Buffer::HasInstance(value)) {
-        metadata.value = Buffer::Data(value);
-        metadata.value_length = Buffer::Length(value);
-        error = grpc_call_add_metadata_old(call->wrapped_call, &metadata, 0);
-      } else if (value->IsString()) {
-        Handle<String> string_value = value->ToString();
-        NanUtf8String utf8_value(string_value);
-        metadata.value = *utf8_value;
-        metadata.value_length = string_value->Length();
-        gpr_log(GPR_DEBUG, "adding metadata: %s, %s, %d", metadata.key,
-                metadata.value, metadata.value_length);
-        error = grpc_call_add_metadata_old(call->wrapped_call, &metadata, 0);
-      } else {
-        return NanThrowTypeError(
-            "addMetadata values must be strings or buffers");
-      }
-      if (error != GRPC_CALL_OK) {
-        return NanThrowError("addMetadata failed", error);
-      }
-    }
-  }
-  NanReturnUndefined();
-}
-
-NAN_METHOD(Call::Invoke) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("invoke can only be called on Call objects");
-  }
-  if (!args[0]->IsFunction()) {
-    return NanThrowTypeError("invoke's first argument must be a function");
+    return NanThrowError("startBatch's first argument must be an object");
   }
   if (!args[1]->IsFunction()) {
-    return NanThrowTypeError("invoke's second argument must be a function");
-  }
-  if (!args[2]->IsUint32()) {
-    return NanThrowTypeError("invoke's third argument must be integer flags");
-  }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
-  unsigned int flags = args[3]->Uint32Value();
-  grpc_call_error error = grpc_call_invoke_old(
-      call->wrapped_call, CompletionQueueAsyncWorker::GetQueue(),
-      CreateTag(args[0], args.This()), CreateTag(args[1], args.This()), flags);
-  if (error == GRPC_CALL_OK) {
-    CompletionQueueAsyncWorker::Next();
-    CompletionQueueAsyncWorker::Next();
-  } else {
-    return NanThrowError("invoke failed", error);
-  }
-  NanReturnUndefined();
-}
-
-NAN_METHOD(Call::ServerAccept) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("accept can only be called on Call objects");
-  }
-  if (!args[0]->IsFunction()) {
-    return NanThrowTypeError("accept's first argument must be a function");
+    return NanThrowError("startBatch's second argument must be a callback");
   }
+  Handle<Function> callback_func = args[1].As<Function>();
   Call *call = ObjectWrap::Unwrap<Call>(args.This());
-  grpc_call_error error = grpc_call_server_accept_old(
-      call->wrapped_call, CompletionQueueAsyncWorker::GetQueue(),
-      CreateTag(args[0], args.This()));
-  if (error == GRPC_CALL_OK) {
-    CompletionQueueAsyncWorker::Next();
-  } else {
-    return NanThrowError("serverAccept failed", error);
-  }
-  NanReturnUndefined();
-}
-
-NAN_METHOD(Call::ServerEndInitialMetadata) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError(
-        "serverEndInitialMetadata can only be called on Call objects");
-  }
-  if (!args[0]->IsUint32()) {
-    return NanThrowTypeError(
-        "serverEndInitialMetadata's second argument must be integer flags");
+  shared_ptr<Resources> resources(new Resources);
+  Handle<Object> obj = args[0]->ToObject();
+  Handle<Array> keys = obj->GetOwnPropertyNames();
+  size_t nops = keys->Length();
+  vector<grpc_op> ops(nops);
+  unique_ptr<OpVec> op_vector(new OpVec());
+  for (unsigned int i = 0; i < nops; i++) {
+    unique_ptr<Op> op;
+    if (!keys->Get(i)->IsUint32()) {
+      return NanThrowError(
+          "startBatch's first argument's keys must be integers");
+    }
+    uint32_t type = keys->Get(i)->Uint32Value();
+    ops[i].op = static_cast<grpc_op_type>(type);
+    switch (type) {
+      case GRPC_OP_SEND_INITIAL_METADATA:
+        op.reset(new SendMetadataOp());
+        break;
+      case GRPC_OP_SEND_MESSAGE:
+        op.reset(new SendMessageOp());
+        break;
+      case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+        op.reset(new SendClientCloseOp());
+        break;
+      case GRPC_OP_SEND_STATUS_FROM_SERVER:
+        op.reset(new SendServerStatusOp());
+        break;
+      case GRPC_OP_RECV_INITIAL_METADATA:
+        op.reset(new GetMetadataOp());
+        break;
+      case GRPC_OP_RECV_MESSAGE:
+        op.reset(new ReadMessageOp());
+        break;
+      case GRPC_OP_RECV_STATUS_ON_CLIENT:
+        op.reset(new ClientStatusOp());
+        break;
+      case GRPC_OP_RECV_CLOSE_ON_SERVER:
+        op.reset(new ServerCloseResponseOp());
+        break;
+      default:
+        return NanThrowError("Argument object had an unrecognized key");
+    }
+    if (!op->ParseOp(obj->Get(type), &ops[i], resources)) {
+      return NanThrowTypeError("Incorrectly typed arguments to startBatch");
+    }
+    op_vector->push_back(std::move(op));
   }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
-  unsigned int flags = args[1]->Uint32Value();
-  grpc_call_error error =
-      grpc_call_server_end_initial_metadata_old(call->wrapped_call, flags);
+  NanCallback *callback = new NanCallback(callback_func);
+  grpc_call_error error = grpc_call_start_batch(
+      call->wrapped_call, &ops[0], nops, new struct tag(
+          callback, op_vector.release(), resources));
   if (error != GRPC_CALL_OK) {
-    return NanThrowError("serverEndInitialMetadata failed", error);
+    return NanThrowError("startBatch failed", error);
   }
+  CompletionQueueAsyncWorker::Next();
   NanReturnUndefined();
 }
 
@@ -297,102 +596,5 @@ NAN_METHOD(Call::Cancel) {
   NanReturnUndefined();
 }
 
-NAN_METHOD(Call::StartWrite) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("startWrite can only be called on Call objects");
-  }
-  if (!Buffer::HasInstance(args[0])) {
-    return NanThrowTypeError("startWrite's first argument must be a Buffer");
-  }
-  if (!args[1]->IsFunction()) {
-    return NanThrowTypeError("startWrite's second argument must be a function");
-  }
-  if (!args[2]->IsUint32()) {
-    return NanThrowTypeError(
-        "startWrite's third argument must be integer flags");
-  }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
-  grpc_byte_buffer *buffer = BufferToByteBuffer(args[0]);
-  unsigned int flags = args[2]->Uint32Value();
-  grpc_call_error error = grpc_call_start_write_old(
-      call->wrapped_call, buffer, CreateTag(args[1], args.This()), flags);
-  if (error == GRPC_CALL_OK) {
-    CompletionQueueAsyncWorker::Next();
-  } else {
-    return NanThrowError("startWrite failed", error);
-  }
-  NanReturnUndefined();
-}
-
-NAN_METHOD(Call::StartWriteStatus) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError(
-        "startWriteStatus can only be called on Call objects");
-  }
-  if (!args[0]->IsUint32()) {
-    return NanThrowTypeError(
-        "startWriteStatus's first argument must be a status code");
-  }
-  if (!args[1]->IsString()) {
-    return NanThrowTypeError(
-        "startWriteStatus's second argument must be a string");
-  }
-  if (!args[2]->IsFunction()) {
-    return NanThrowTypeError(
-        "startWriteStatus's third argument must be a function");
-  }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
-  NanUtf8String details(args[1]);
-  grpc_call_error error = grpc_call_start_write_status_old(
-      call->wrapped_call, (grpc_status_code)args[0]->Uint32Value(), *details,
-      CreateTag(args[2], args.This()));
-  if (error == GRPC_CALL_OK) {
-    CompletionQueueAsyncWorker::Next();
-  } else {
-    return NanThrowError("startWriteStatus failed", error);
-  }
-  NanReturnUndefined();
-}
-
-NAN_METHOD(Call::WritesDone) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("writesDone can only be called on Call objects");
-  }
-  if (!args[0]->IsFunction()) {
-    return NanThrowTypeError("writesDone's first argument must be a function");
-  }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
-  grpc_call_error error = grpc_call_writes_done_old(
-      call->wrapped_call, CreateTag(args[0], args.This()));
-  if (error == GRPC_CALL_OK) {
-    CompletionQueueAsyncWorker::Next();
-  } else {
-    return NanThrowError("writesDone failed", error);
-  }
-  NanReturnUndefined();
-}
-
-NAN_METHOD(Call::StartRead) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("startRead can only be called on Call objects");
-  }
-  if (!args[0]->IsFunction()) {
-    return NanThrowTypeError("startRead's first argument must be a function");
-  }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
-  grpc_call_error error = grpc_call_start_read_old(
-      call->wrapped_call, CreateTag(args[0], args.This()));
-  if (error == GRPC_CALL_OK) {
-    CompletionQueueAsyncWorker::Next();
-  } else {
-    return NanThrowError("startRead failed", error);
-  }
-  NanReturnUndefined();
-}
-
 }  // namespace node
 }  // namespace grpc
diff --git a/src/node/ext/call.h b/src/node/ext/call.h
index 1924a1bf42..dbdb8e2ff6 100644
--- a/src/node/ext/call.h
+++ b/src/node/ext/call.h
@@ -34,15 +34,71 @@
 #ifndef NET_GRPC_NODE_CALL_H_
 #define NET_GRPC_NODE_CALL_H_
 
+#include <memory>
+#include <vector>
+
 #include <node.h>
 #include <nan.h>
 #include "grpc/grpc.h"
 
 #include "channel.h"
 
+
 namespace grpc {
 namespace node {
 
+using std::unique_ptr;
+using std::shared_ptr;
+
+v8::Handle<v8::Value> ParseMetadata(const grpc_metadata_array *metadata_array);
+
+class PersistentHolder {
+ public:
+  explicit PersistentHolder(v8::Persistent<v8::Value> persist) :
+      persist(persist) {
+  }
+
+  ~PersistentHolder() {
+    NanDisposePersistent(persist);
+  }
+
+ private:
+  v8::Persistent<v8::Value> persist;
+};
+
+struct Resources {
+  std::vector<unique_ptr<NanUtf8String> > strings;
+  std::vector<unique_ptr<PersistentHolder> > handles;
+};
+
+class Op {
+ public:
+  virtual v8::Handle<v8::Value> GetNodeValue() const = 0;
+  virtual bool ParseOp(v8::Handle<v8::Value> value, grpc_op *out,
+                       shared_ptr<Resources> resources) = 0;
+  v8::Handle<v8::Value> GetOpType() const;
+
+ protected:
+  virtual std::string GetTypeString() const = 0;
+};
+
+typedef std::vector<unique_ptr<Op>> OpVec;
+
+struct tag {
+  tag(NanCallback *callback, OpVec *ops,
+      shared_ptr<Resources> resources);
+  ~tag();
+  NanCallback *callback;
+  OpVec *ops;
+  shared_ptr<Resources> resources;
+};
+
+v8::Handle<v8::Value> GetTagNodeValue(void *tag);
+
+NanCallback *GetTagCallback(void *tag);
+
+void DestroyTag(void *tag);
+
 /* Wrapper class for grpc_call structs. */
 class Call : public ::node::ObjectWrap {
  public:
@@ -60,15 +116,8 @@ class Call : public ::node::ObjectWrap {
   Call &operator=(const Call &);
 
   static NAN_METHOD(New);
-  static NAN_METHOD(AddMetadata);
-  static NAN_METHOD(Invoke);
-  static NAN_METHOD(ServerAccept);
-  static NAN_METHOD(ServerEndInitialMetadata);
+  static NAN_METHOD(StartBatch);
   static NAN_METHOD(Cancel);
-  static NAN_METHOD(StartWrite);
-  static NAN_METHOD(StartWriteStatus);
-  static NAN_METHOD(WritesDone);
-  static NAN_METHOD(StartRead);
   static v8::Persistent<v8::Function> constructor;
   // Used for typechecking instances of this javascript class
   static v8::Persistent<v8::FunctionTemplate> fun_tpl;
diff --git a/src/node/ext/completion_queue_async_worker.cc b/src/node/ext/completion_queue_async_worker.cc
index 8de7db66d5..a1f390f64b 100644
--- a/src/node/ext/completion_queue_async_worker.cc
+++ b/src/node/ext/completion_queue_async_worker.cc
@@ -35,10 +35,10 @@
 #include <nan.h>
 
 #include "grpc/grpc.h"
+#include "grpc/support/log.h"
 #include "grpc/support/time.h"
 #include "completion_queue_async_worker.h"
-#include "event.h"
-#include "tag.h"
+#include "call.h"
 
 namespace grpc {
 namespace node {
@@ -58,6 +58,9 @@ CompletionQueueAsyncWorker::~CompletionQueueAsyncWorker() {}
 
 void CompletionQueueAsyncWorker::Execute() {
   result = grpc_completion_queue_next(queue, gpr_inf_future);
+  if (result->data.op_complete != GRPC_OP_OK) {
+    SetErrorMessage("The batch encountered an error");
+  }
 }
 
 grpc_completion_queue *CompletionQueueAsyncWorker::GetQueue() { return queue; }
@@ -75,14 +78,26 @@ void CompletionQueueAsyncWorker::Init(Handle<Object> exports) {
 
 void CompletionQueueAsyncWorker::HandleOKCallback() {
   NanScope();
-  NanCallback event_callback(GetTagHandle(result->tag).As<Function>());
-  Handle<Value> argv[] = {CreateEventObject(result)};
+  NanCallback *callback = GetTagCallback(result->tag);
+  Handle<Value> argv[] = {NanNull(), GetTagNodeValue(result->tag)};
+
+  callback->Call(2, argv);
 
   DestroyTag(result->tag);
   grpc_event_finish(result);
   result = NULL;
+}
+
+void CompletionQueueAsyncWorker::HandleErrorCallback() {
+  NanScope();
+  NanCallback *callback = GetTagCallback(result->tag);
+  Handle<Value> argv[] = {NanError(ErrorMessage())};
 
-  event_callback.Call(1, argv);
+  callback->Call(1, argv);
+
+  DestroyTag(result->tag);
+  grpc_event_finish(result);
+  result = NULL;
 }
 
 }  // namespace node
diff --git a/src/node/ext/completion_queue_async_worker.h b/src/node/ext/completion_queue_async_worker.h
index 2c928b7024..c04a303283 100644
--- a/src/node/ext/completion_queue_async_worker.h
+++ b/src/node/ext/completion_queue_async_worker.h
@@ -67,6 +67,8 @@ class CompletionQueueAsyncWorker : public NanAsyncWorker {
      completion_queue_next */
   void HandleOKCallback();
 
+  void HandleErrorCallback();
+
  private:
   grpc_event *result;
 
diff --git a/src/node/ext/credentials.cc b/src/node/ext/credentials.cc
index c8859ed941..b79c3e3019 100644
--- a/src/node/ext/credentials.cc
+++ b/src/node/ext/credentials.cc
@@ -63,7 +63,6 @@ Credentials::Credentials(grpc_credentials *credentials)
     : wrapped_credentials(credentials) {}
 
 Credentials::~Credentials() {
-  gpr_log(GPR_DEBUG, "Destroying credentials object");
   grpc_credentials_release(wrapped_credentials);
 }
 
diff --git a/src/node/ext/event.cc b/src/node/ext/event.cc
deleted file mode 100644
index d59b68fb40..0000000000
--- a/src/node/ext/event.cc
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <map>
-
-#include <node.h>
-#include <nan.h>
-#include "grpc/grpc.h"
-#include "byte_buffer.h"
-#include "call.h"
-#include "event.h"
-#include "tag.h"
-#include "timeval.h"
-
-namespace grpc {
-namespace node {
-
-using ::node::Buffer;
-using v8::Array;
-using v8::Date;
-using v8::Handle;
-using v8::HandleScope;
-using v8::Number;
-using v8::Object;
-using v8::Persistent;
-using v8::String;
-using v8::Value;
-
-Handle<Value> ParseMetadata(grpc_metadata *metadata_elements, size_t length) {
-  NanEscapableScope();
-  std::map<const char*, size_t> size_map;
-  std::map<const char*, size_t> index_map;
-
-  for (unsigned int i = 0; i < length; i++) {
-    const char *key = metadata_elements[i].key;
-    if (size_map.count(key)) {
-      size_map[key] += 1;
-    }
-    index_map[key] = 0;
-  }
-  Handle<Object> metadata_object = NanNew<Object>();
-  for (unsigned int i = 0; i < length; i++) {
-    grpc_metadata* elem = &metadata_elements[i];
-    Handle<String> key_string = String::New(elem->key);
-    Handle<Array> array;
-    if (metadata_object->Has(key_string)) {
-      array = Handle<Array>::Cast(metadata_object->Get(key_string));
-    } else {
-      array = NanNew<Array>(size_map[elem->key]);
-      metadata_object->Set(key_string, array);
-    }
-    array->Set(index_map[elem->key],
-               MakeFastBuffer(
-                   NanNewBufferHandle(elem->value, elem->value_length)));
-    index_map[elem->key] += 1;
-  }
-  return NanEscapeScope(metadata_object);
-}
-
-Handle<Value> GetEventData(grpc_event *event) {
-  NanEscapableScope();
-  size_t count;
-  grpc_metadata *items;
-  Handle<Array> metadata;
-  Handle<Object> status;
-  Handle<Object> rpc_new;
-  switch (event->type) {
-    case GRPC_READ:
-      return NanEscapeScope(ByteBufferToBuffer(event->data.read));
-    case GRPC_WRITE_ACCEPTED:
-      return NanEscapeScope(NanNew<Number>(event->data.write_accepted));
-    case GRPC_FINISH_ACCEPTED:
-      return NanEscapeScope(NanNew<Number>(event->data.finish_accepted));
-    case GRPC_CLIENT_METADATA_READ:
-      count = event->data.client_metadata_read.count;
-      items = event->data.client_metadata_read.elements;
-      return NanEscapeScope(ParseMetadata(items, count));
-    case GRPC_FINISHED:
-      status = NanNew<Object>();
-      status->Set(NanNew("code"), NanNew<Number>(event->data.finished.status));
-      if (event->data.finished.details != NULL) {
-        status->Set(NanNew("details"),
-                    String::New(event->data.finished.details));
-      }
-      count = event->data.finished.metadata_count;
-      items = event->data.finished.metadata_elements;
-      status->Set(NanNew("metadata"), ParseMetadata(items, count));
-      return NanEscapeScope(status);
-    case GRPC_SERVER_RPC_NEW:
-      rpc_new = NanNew<Object>();
-      if (event->data.server_rpc_new.method == NULL) {
-        return NanEscapeScope(NanNull());
-      }
-      rpc_new->Set(
-          NanNew("method"),
-          NanNew(event->data.server_rpc_new.method));
-      rpc_new->Set(
-          NanNew("host"),
-          NanNew(event->data.server_rpc_new.host));
-      rpc_new->Set(NanNew("absolute_deadline"),
-                   NanNew<Date>(TimespecToMilliseconds(
-                       event->data.server_rpc_new.deadline)));
-      count = event->data.server_rpc_new.metadata_count;
-      items = event->data.server_rpc_new.metadata_elements;
-      metadata = NanNew<Array>(static_cast<int>(count));
-      for (unsigned int i = 0; i < count; i++) {
-        Handle<Object> item_obj = Object::New();
-        item_obj->Set(NanNew("key"),
-                      NanNew(items[i].key));
-        item_obj->Set(
-            NanNew("value"),
-            NanNew(items[i].value, static_cast<int>(items[i].value_length)));
-        metadata->Set(i, item_obj);
-      }
-      rpc_new->Set(NanNew("metadata"), ParseMetadata(items, count));
-      return NanEscapeScope(rpc_new);
-    default:
-      return NanEscapeScope(NanNull());
-  }
-}
-
-Handle<Value> CreateEventObject(grpc_event *event) {
-  NanEscapableScope();
-  if (event == NULL) {
-    return NanEscapeScope(NanNull());
-  }
-  Handle<Object> event_obj = NanNew<Object>();
-  Handle<Value> call;
-  if (TagHasCall(event->tag)) {
-    call = TagGetCall(event->tag);
-  } else {
-    call = Call::WrapStruct(event->call);
-  }
-  event_obj->Set(NanNew<String, const char *>("call"), call);
-  event_obj->Set(NanNew<String, const char *>("type"),
-                 NanNew<Number>(event->type));
-  event_obj->Set(NanNew<String, const char *>("data"), GetEventData(event));
-
-  return NanEscapeScope(event_obj);
-}
-
-}  // namespace node
-}  // namespace grpc
diff --git a/src/node/ext/event.h b/src/node/ext/event.h
deleted file mode 100644
index e06d8f0168..0000000000
--- a/src/node/ext/event.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- *
- * Copyright 2014, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef NET_GRPC_NODE_EVENT_H_
-#define NET_GRPC_NODE_EVENT_H_
-
-#include <node.h>
-#include "grpc/grpc.h"
-
-namespace grpc {
-namespace node {
-
-v8::Handle<v8::Value> CreateEventObject(grpc_event *event);
-
-}  // namespace node
-}  // namespace grpc
-
-#endif  // NET_GRPC_NODE_EVENT_H_
diff --git a/src/node/ext/node_grpc.cc b/src/node/ext/node_grpc.cc
index bc1dfaf899..9b0fe82976 100644
--- a/src/node/ext/node_grpc.cc
+++ b/src/node/ext/node_grpc.cc
@@ -130,35 +130,34 @@ void InitCallErrorConstants(Handle<Object> exports) {
   call_error->Set(NanNew("INVALID_FLAGS"), INVALID_FLAGS);
 }
 
-void InitOpErrorConstants(Handle<Object> exports) {
+void InitOpTypeConstants(Handle<Object> exports) {
   NanScope();
-  Handle<Object> op_error = Object::New();
-  exports->Set(NanNew("opError"), op_error);
-  Handle<Value> OK(NanNew<Uint32, uint32_t>(GRPC_OP_OK));
-  op_error->Set(NanNew("OK"), OK);
-  Handle<Value> ERROR(NanNew<Uint32, uint32_t>(GRPC_OP_ERROR));
-  op_error->Set(NanNew("ERROR"), ERROR);
-}
-
-void InitCompletionTypeConstants(Handle<Object> exports) {
-  NanScope();
-  Handle<Object> completion_type = Object::New();
-  exports->Set(NanNew("completionType"), completion_type);
-  Handle<Value> QUEUE_SHUTDOWN(NanNew<Uint32, uint32_t>(GRPC_QUEUE_SHUTDOWN));
-  completion_type->Set(NanNew("QUEUE_SHUTDOWN"), QUEUE_SHUTDOWN);
-  Handle<Value> READ(NanNew<Uint32, uint32_t>(GRPC_READ));
-  completion_type->Set(NanNew("READ"), READ);
-  Handle<Value> WRITE_ACCEPTED(NanNew<Uint32, uint32_t>(GRPC_WRITE_ACCEPTED));
-  completion_type->Set(NanNew("WRITE_ACCEPTED"), WRITE_ACCEPTED);
-  Handle<Value> FINISH_ACCEPTED(NanNew<Uint32, uint32_t>(GRPC_FINISH_ACCEPTED));
-  completion_type->Set(NanNew("FINISH_ACCEPTED"), FINISH_ACCEPTED);
-  Handle<Value> CLIENT_METADATA_READ(
-      NanNew<Uint32, uint32_t>(GRPC_CLIENT_METADATA_READ));
-  completion_type->Set(NanNew("CLIENT_METADATA_READ"), CLIENT_METADATA_READ);
-  Handle<Value> FINISHED(NanNew<Uint32, uint32_t>(GRPC_FINISHED));
-  completion_type->Set(NanNew("FINISHED"), FINISHED);
-  Handle<Value> SERVER_RPC_NEW(NanNew<Uint32, uint32_t>(GRPC_SERVER_RPC_NEW));
-  completion_type->Set(NanNew("SERVER_RPC_NEW"), SERVER_RPC_NEW);
+  Handle<Object> op_type = Object::New();
+  exports->Set(NanNew("opType"), op_type);
+  Handle<Value> SEND_INITIAL_METADATA(
+      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_INITIAL_METADATA));
+  op_type->Set(NanNew("SEND_INITIAL_METADATA"), SEND_INITIAL_METADATA);
+  Handle<Value> SEND_MESSAGE(
+      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_MESSAGE));
+  op_type->Set(NanNew("SEND_MESSAGE"), SEND_MESSAGE);
+  Handle<Value> SEND_CLOSE_FROM_CLIENT(
+      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_CLOSE_FROM_CLIENT));
+  op_type->Set(NanNew("SEND_CLOSE_FROM_CLIENT"), SEND_CLOSE_FROM_CLIENT);
+  Handle<Value> SEND_STATUS_FROM_SERVER(
+      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_STATUS_FROM_SERVER));
+  op_type->Set(NanNew("SEND_STATUS_FROM_SERVER"), SEND_STATUS_FROM_SERVER);
+  Handle<Value> RECV_INITIAL_METADATA(
+      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_INITIAL_METADATA));
+  op_type->Set(NanNew("RECV_INITIAL_METADATA"), RECV_INITIAL_METADATA);
+  Handle<Value> RECV_MESSAGE(
+      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_MESSAGE));
+  op_type->Set(NanNew("RECV_MESSAGE"), RECV_MESSAGE);
+  Handle<Value> RECV_STATUS_ON_CLIENT(
+      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_STATUS_ON_CLIENT));
+  op_type->Set(NanNew("RECV_STATUS_ON_CLIENT"), RECV_STATUS_ON_CLIENT);
+  Handle<Value> RECV_CLOSE_ON_SERVER(
+      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_CLOSE_ON_SERVER));
+  op_type->Set(NanNew("RECV_CLOSE_ON_SERVER"), RECV_CLOSE_ON_SERVER);
 }
 
 void init(Handle<Object> exports) {
@@ -166,8 +165,7 @@ void init(Handle<Object> exports) {
   grpc_init();
   InitStatusConstants(exports);
   InitCallErrorConstants(exports);
-  InitOpErrorConstants(exports);
-  InitCompletionTypeConstants(exports);
+  InitOpTypeConstants(exports);
 
   grpc::node::Call::Init(exports);
   grpc::node::Channel::Init(exports);
diff --git a/src/node/ext/server.cc b/src/node/ext/server.cc
index 6b8ccef9b1..ee3e1087ce 100644
--- a/src/node/ext/server.cc
+++ b/src/node/ext/server.cc
@@ -31,6 +31,8 @@
  *
  */
 
+#include <memory>
+
 #include "server.h"
 
 #include <node.h>
@@ -41,17 +43,20 @@
 #include <vector>
 #include "grpc/grpc.h"
 #include "grpc/grpc_security.h"
+#include "grpc/support/log.h"
 #include "call.h"
 #include "completion_queue_async_worker.h"
-#include "tag.h"
 #include "server_credentials.h"
+#include "timeval.h"
 
 namespace grpc {
 namespace node {
 
+using std::unique_ptr;
 using v8::Arguments;
 using v8::Array;
 using v8::Boolean;
+using v8::Date;
 using v8::Exception;
 using v8::Function;
 using v8::FunctionTemplate;
@@ -67,6 +72,49 @@ using v8::Value;
 Persistent<Function> Server::constructor;
 Persistent<FunctionTemplate> Server::fun_tpl;
 
+class NewCallOp : public Op {
+ public:
+  NewCallOp() {
+    call = NULL;
+    grpc_call_details_init(&details);
+    grpc_metadata_array_init(&request_metadata);
+  }
+
+  ~NewCallOp() {
+    grpc_call_details_destroy(&details);
+    grpc_metadata_array_destroy(&request_metadata);
+  }
+
+  Handle<Value> GetNodeValue() const {
+    NanEscapableScope();
+    if (call == NULL) {
+      return NanEscapeScope(NanNull());
+    }
+    Handle<Object> obj = NanNew<Object>();
+    obj->Set(NanNew("call"), Call::WrapStruct(call));
+    obj->Set(NanNew("method"), NanNew(details.method));
+    obj->Set(NanNew("host"), NanNew(details.host));
+    obj->Set(NanNew("deadline"),
+             NanNew<Date>(TimespecToMilliseconds(details.deadline)));
+    obj->Set(NanNew("metadata"), ParseMetadata(&request_metadata));
+    return NanEscapeScope(obj);
+  }
+
+  bool ParseOp(Handle<Value> value, grpc_op *out,
+               shared_ptr<Resources> resources) {
+    return true;
+  }
+
+  grpc_call *call;
+  grpc_call_details details;
+  grpc_metadata_array request_metadata;
+
+ protected:
+  std::string GetTypeString() const {
+    return "new call";
+  }
+};
+
 Server::Server(grpc_server *server) : wrapped_server(server) {}
 
 Server::~Server() { grpc_server_destroy(wrapped_server); }
@@ -175,13 +223,18 @@ NAN_METHOD(Server::RequestCall) {
     return NanThrowTypeError("requestCall can only be called on a Server");
   }
   Server *server = ObjectWrap::Unwrap<Server>(args.This());
-  grpc_call_error error = grpc_server_request_call_old(
-      server->wrapped_server, CreateTag(args[0], NanNull()));
-  if (error == GRPC_CALL_OK) {
-    CompletionQueueAsyncWorker::Next();
-  } else {
+  NewCallOp *op = new NewCallOp();
+  unique_ptr<OpVec> ops(new OpVec());
+  ops->push_back(unique_ptr<Op>(op));
+  grpc_call_error error = grpc_server_request_call(
+      server->wrapped_server, &op->call, &op->details, &op->request_metadata,
+      CompletionQueueAsyncWorker::GetQueue(),
+      new struct tag(new NanCallback(args[0].As<Function>()), ops.release(),
+                     shared_ptr<Resources>(nullptr)));
+  if (error != GRPC_CALL_OK) {
     return NanThrowError("requestCall failed", error);
   }
+  CompletionQueueAsyncWorker::Next();
   NanReturnUndefined();
 }
 
diff --git a/src/node/ext/server_credentials.cc b/src/node/ext/server_credentials.cc
index 393f3a6305..3add43c48c 100644
--- a/src/node/ext/server_credentials.cc
+++ b/src/node/ext/server_credentials.cc
@@ -63,7 +63,6 @@ ServerCredentials::ServerCredentials(grpc_server_credentials *credentials)
     : wrapped_credentials(credentials) {}
 
 ServerCredentials::~ServerCredentials() {
-  gpr_log(GPR_DEBUG, "Destroying server credentials object");
   grpc_server_credentials_release(wrapped_credentials);
 }
 
diff --git a/src/node/ext/tag.cc b/src/node/ext/tag.cc
deleted file mode 100644
index dc8e523e12..0000000000
--- a/src/node/ext/tag.cc
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- *
- * Copyright 2014, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <stdlib.h>
-#include <node.h>
-#include <nan.h>
-#include "tag.h"
-
-namespace grpc {
-namespace node {
-
-using v8::Handle;
-using v8::HandleScope;
-using v8::Persistent;
-using v8::Value;
-
-struct tag {
-  tag(Persistent<Value> *tag, Persistent<Value> *call)
-      : persist_tag(tag), persist_call(call) {}
-
-  ~tag() {
-    persist_tag->Dispose();
-    if (persist_call != NULL) {
-      persist_call->Dispose();
-    }
-  }
-  Persistent<Value> *persist_tag;
-  Persistent<Value> *persist_call;
-};
-
-void *CreateTag(Handle<Value> tag, Handle<Value> call) {
-  NanScope();
-  Persistent<Value> *persist_tag = new Persistent<Value>();
-  NanAssignPersistent(*persist_tag, tag);
-  Persistent<Value> *persist_call;
-  if (call->IsNull() || call->IsUndefined()) {
-    persist_call = NULL;
-  } else {
-    persist_call = new Persistent<Value>();
-    NanAssignPersistent(*persist_call, call);
-  }
-  struct tag *tag_struct = new struct tag(persist_tag, persist_call);
-  return reinterpret_cast<void *>(tag_struct);
-}
-
-Handle<Value> GetTagHandle(void *tag) {
-  NanEscapableScope();
-  struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
-  Handle<Value> tag_value = NanNew<Value>(*tag_struct->persist_tag);
-  return NanEscapeScope(tag_value);
-}
-
-bool TagHasCall(void *tag) {
-  struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
-  return tag_struct->persist_call != NULL;
-}
-
-Handle<Value> TagGetCall(void *tag) {
-  NanEscapableScope();
-  struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
-  if (tag_struct->persist_call == NULL) {
-    return NanEscapeScope(NanNull());
-  }
-  Handle<Value> call_value = NanNew<Value>(*tag_struct->persist_call);
-  return NanEscapeScope(call_value);
-}
-
-void DestroyTag(void *tag) { delete reinterpret_cast<struct tag *>(tag); }
-
-}  // namespace node
-}  // namespace grpc
diff --git a/src/node/ext/tag.h b/src/node/ext/tag.h
deleted file mode 100644
index bdb09252d9..0000000000
--- a/src/node/ext/tag.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- *
- * Copyright 2014, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef NET_GRPC_NODE_TAG_H_
-#define NET_GRPC_NODE_TAG_H_
-
-#include <node.h>
-
-namespace grpc {
-namespace node {
-
-/* Create a void* tag that can be passed to various grpc_call functions from
-   a javascript value and the javascript wrapper for the call. The call can be
-   null. */
-void *CreateTag(v8::Handle<v8::Value> tag, v8::Handle<v8::Value> call);
-/* Return the javascript value stored in the tag */
-v8::Handle<v8::Value> GetTagHandle(void *tag);
-/* Returns true if the call was set (non-null) when the tag was created */
-bool TagHasCall(void *tag);
-/* Returns the javascript wrapper for the call associated with this tag */
-v8::Handle<v8::Value> TagGetCall(void *call);
-/* Destroy the tag and all resources it is holding. It is illegal to call any
-   of these other functions on a tag after it has been destroyed. */
-void DestroyTag(void *tag);
-
-}  // namespace node
-}  // namespace grpc
-
-#endif  // NET_GRPC_NODE_TAG_H_
diff --git a/src/node/index.js b/src/node/index.js
index 0627e7f557..baef4d03c6 100644
--- a/src/node/index.js
+++ b/src/node/index.js
@@ -35,9 +35,9 @@ var _ = require('underscore');
 
 var ProtoBuf = require('protobufjs');
 
-var surface_client = require('./src/surface_client.js');
+var client = require('./src/client.js');
 
-var surface_server = require('./src/surface_server.js');
+var server = require('./src/server.js');
 
 var grpc = require('bindings')('grpc');
 
@@ -54,7 +54,7 @@ function loadObject(value) {
     });
     return result;
   } else if (value.className === 'Service') {
-    return surface_client.makeClientConstructor(value);
+    return client.makeClientConstructor(value);
   } else if (value.className === 'Message' || value.className === 'Enum') {
     return value.build();
   } else {
@@ -84,9 +84,9 @@ exports.loadObject = loadObject;
 exports.load = load;
 
 /**
- * See docs for surface_server.makeServerConstructor
+ * See docs for server.makeServerConstructor
  */
-exports.buildServer = surface_server.makeServerConstructor;
+exports.buildServer = server.makeServerConstructor;
 
 /**
  * Status name to code number mapping
diff --git a/src/node/interop/interop_client.js b/src/node/interop/interop_client.js
index ce18f77fe7..8737af6cde 100644
--- a/src/node/interop/interop_client.js
+++ b/src/node/interop/interop_client.js
@@ -145,8 +145,8 @@ function serverStreaming(client, done) {
     resp_index += 1;
   });
   call.on('status', function(status) {
-    assert.strictEqual(resp_index, 4);
     assert.strictEqual(status.code, grpc.status.OK);
+    assert.strictEqual(resp_index, 4);
     if (done) {
       done();
     }
diff --git a/src/node/package.json b/src/node/package.json
index 028dc20555..8f81014c1e 100644
--- a/src/node/package.json
+++ b/src/node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "gRPC Library for Node",
   "scripts": {
     "test": "./node_modules/mocha/bin/mocha"
diff --git a/src/node/src/client.js b/src/node/src/client.js
index 3a1c9eef84..81fa65eb26 100644
--- a/src/node/src/client.js
+++ b/src/node/src/client.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2014, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,185 +31,452 @@
  *
  */
 
+var _ = require('underscore');
+
+var capitalize = require('underscore.string/capitalize');
+var decapitalize = require('underscore.string/decapitalize');
+
 var grpc = require('bindings')('grpc.node');
 
-var common = require('./common');
+var common = require('./common.js');
+
+var EventEmitter = require('events').EventEmitter;
 
-var Duplex = require('stream').Duplex;
+var stream = require('stream');
+
+var Readable = stream.Readable;
+var Writable = stream.Writable;
+var Duplex = stream.Duplex;
 var util = require('util');
 
-util.inherits(GrpcClientStream, Duplex);
+util.inherits(ClientWritableStream, Writable);
 
 /**
- * Class for representing a gRPC client side stream as a Node stream. Extends
- * from stream.Duplex.
+ * A stream that the client can write to. Used for calls that are streaming from
+ * the client side.
  * @constructor
- * @param {grpc.Call} call Call object to proxy
- * @param {function(*):Buffer=} serialize Serialization function for requests
- * @param {function(Buffer):*=} deserialize Deserialization function for
- *     responses
+ * @param {grpc.Call} call The call object to send data with
+ * @param {function(*):Buffer=} serialize Serialization function for writes.
  */
-function GrpcClientStream(call, serialize, deserialize) {
-  Duplex.call(this, {objectMode: true});
-  if (!serialize) {
-    serialize = function(value) {
-      return value;
-    };
-  }
-  if (!deserialize) {
-    deserialize = function(value) {
-      return value;
-    };
-  }
-  var self = this;
-  var finished = false;
-  // Indicates that a read is currently pending
-  var reading = false;
-  // Indicates that a write is currently pending
-  var writing = false;
-  this._call = call;
+function ClientWritableStream(call, serialize) {
+  Writable.call(this, {objectMode: true});
+  this.call = call;
+  this.serialize = common.wrapIgnoreNull(serialize);
+  this.on('finish', function() {
+    var batch = {};
+    batch[grpc.opType.SEND_CLOSE_FROM_CLIENT] = true;
+    call.startBatch(batch, function() {});
+  });
+}
 
-  /**
-   * Serialize a request value to a buffer. Always maps null to null. Otherwise
-   * uses the provided serialize function
-   * @param {*} value The value to serialize
-   * @return {Buffer} The serialized value
-   */
-  this.serialize = function(value) {
-    if (value === null || value === undefined) {
-      return null;
+/**
+ * Attempt to write the given chunk. Calls the callback when done. This is an
+ * implementation of a method needed for implementing stream.Writable.
+ * @param {Buffer} chunk The chunk to write
+ * @param {string} encoding Ignored
+ * @param {function(Error=)} callback Called when the write is complete
+ */
+function _write(chunk, encoding, callback) {
+  var batch = {};
+  batch[grpc.opType.SEND_MESSAGE] = this.serialize(chunk);
+  this.call.startBatch(batch, function(err, event) {
+    if (err) {
+      throw err;
     }
-    return serialize(value);
-  };
+    callback();
+  });
+};
 
-  /**
-   * Deserialize a response buffer to a value. Always maps null to null.
-   * Otherwise uses the provided deserialize function.
-   * @param {Buffer} buffer The buffer to deserialize
-   * @return {*} The deserialized value
-   */
-  this.deserialize = function(buffer) {
-    if (buffer === null) {
-      return null;
-    }
-    return deserialize(buffer);
-  };
+ClientWritableStream.prototype._write = _write;
+
+util.inherits(ClientReadableStream, Readable);
+
+/**
+ * A stream that the client can read from. Used for calls that are streaming
+ * from the server side.
+ * @constructor
+ * @param {grpc.Call} call The call object to read data with
+ * @param {function(Buffer):*=} deserialize Deserialization function for reads
+ */
+function ClientReadableStream(call, deserialize) {
+  Readable.call(this, {objectMode: true});
+  this.call = call;
+  this.finished = false;
+  this.reading = false;
+  this.deserialize = common.wrapIgnoreNull(deserialize);
+}
+
+/**
+ * Read the next object from the stream.
+ * @param {*} size Ignored because we use objectMode=true
+ */
+function _read(size) {
+  var self = this;
   /**
    * Callback to be called when a READ event is received. Pushes the data onto
    * the read queue and starts reading again if applicable
    * @param {grpc.Event} event READ event object
    */
-  function readCallback(event) {
-    if (finished) {
+  function readCallback(err, event) {
+    if (err) {
+      throw err;
+    }
+    if (self.finished) {
       self.push(null);
       return;
     }
-    var data = event.data;
+    var data = event.read;
     if (self.push(self.deserialize(data)) && data != null) {
-      self._call.startRead(readCallback);
+      var read_batch = {};
+      read_batch[grpc.opType.RECV_MESSAGE] = true;
+      self.call.startBatch(read_batch, readCallback);
     } else {
-      reading = false;
+      self.reading = false;
+    }
+  }
+  if (self.finished) {
+    self.push(null);
+  } else {
+    if (!self.reading) {
+      self.reading = true;
+      var read_batch = {};
+      read_batch[grpc.opType.RECV_MESSAGE] = true;
+      self.call.startBatch(read_batch, readCallback);
     }
   }
-  call.invoke(function(event) {
-    self.emit('metadata', event.data);
-  }, function(event) {
-    finished = true;
-    self.emit('status', event.data);
-  }, 0);
+};
+
+ClientReadableStream.prototype._read = _read;
+
+util.inherits(ClientDuplexStream, Duplex);
+
+/**
+ * A stream that the client can read from or write to. Used for calls with
+ * duplex streaming.
+ * @constructor
+ * @param {grpc.Call} call Call object to proxy
+ * @param {function(*):Buffer=} serialize Serialization function for requests
+ * @param {function(Buffer):*=} deserialize Deserialization function for
+ *     responses
+ */
+function ClientDuplexStream(call, serialize, deserialize) {
+  Duplex.call(this, {objectMode: true});
+  this.serialize = common.wrapIgnoreNull(serialize);
+  this.deserialize = common.wrapIgnoreNull(deserialize);
+  var self = this;
+  var finished = false;
+  // Indicates that a read is currently pending
+  var reading = false;
+  this.call = call;
   this.on('finish', function() {
-    call.writesDone(function() {});
+    var batch = {};
+    batch[grpc.opType.SEND_CLOSE_FROM_CLIENT] = true;
+    call.startBatch(batch, function() {});
   });
-  /**
-   * Start reading if there is not already a pending read. Reading will
-   * continue until self.push returns false (indicating reads should slow
-   * down) or the read data is null (indicating that there is no more data).
-   */
-  this.startReading = function() {
-    if (finished) {
-      self.push(null);
-    } else {
-      if (!reading) {
-        reading = true;
-        self._call.startRead(readCallback);
-      }
-    }
-  };
 }
 
+ClientDuplexStream.prototype._read = _read;
+ClientDuplexStream.prototype._write = _write;
+
 /**
- * Start reading. This is an implementation of a method needed for implementing
- * stream.Readable.
- * @param {number} size Ignored
+ * Cancel the ongoing call
  */
-GrpcClientStream.prototype._read = function(size) {
-  this.startReading();
-};
+function cancel() {
+  this.call.cancel();
+}
+
+ClientReadableStream.prototype.cancel = cancel;
+ClientWritableStream.prototype.cancel = cancel;
+ClientDuplexStream.prototype.cancel = cancel;
 
 /**
- * Attempt to write the given chunk. Calls the callback when done. This is an
- * implementation of a method needed for implementing stream.Writable.
- * @param {Buffer} chunk The chunk to write
- * @param {string} encoding Ignored
- * @param {function(Error=)} callback Ignored
+ * Get a function that can make unary requests to the specified method.
+ * @param {string} method The name of the method to request
+ * @param {function(*):Buffer} serialize The serialization function for inputs
+ * @param {function(Buffer)} deserialize The deserialization function for
+ *     outputs
+ * @return {Function} makeUnaryRequest
  */
-GrpcClientStream.prototype._write = function(chunk, encoding, callback) {
-  var self = this;
-  self._call.startWrite(self.serialize(chunk), function(event) {
-    callback();
-  }, 0);
-};
+function makeUnaryRequestFunction(method, serialize, deserialize) {
+  /**
+   * Make a unary request with this method on the given channel with the given
+   * argument, callback, etc.
+   * @this {Client} Client object. Must have a channel member.
+   * @param {*} argument The argument to the call. Should be serializable with
+   *     serialize
+   * @param {function(?Error, value=)} callback The callback to for when the
+   *     response is received
+   * @param {array=} metadata Array of metadata key/value pairs to add to the
+   *     call
+   * @param {(number|Date)=} deadline The deadline for processing this request.
+   *     Defaults to infinite future
+   * @return {EventEmitter} An event emitter for stream related events
+   */
+  function makeUnaryRequest(argument, callback, metadata, deadline) {
+    if (deadline === undefined) {
+      deadline = Infinity;
+    }
+    var emitter = new EventEmitter();
+    var call = new grpc.Call(this.channel, method, deadline);
+    if (metadata === null || metadata === undefined) {
+      metadata = {};
+    }
+    emitter.cancel = function cancel() {
+      call.cancel();
+    };
+    var client_batch = {};
+    client_batch[grpc.opType.SEND_INITIAL_METADATA] = metadata;
+    client_batch[grpc.opType.SEND_MESSAGE] = serialize(argument);
+    client_batch[grpc.opType.SEND_CLOSE_FROM_CLIENT] = true;
+    client_batch[grpc.opType.RECV_INITIAL_METADATA] = true;
+    client_batch[grpc.opType.RECV_MESSAGE] = true;
+    client_batch[grpc.opType.RECV_STATUS_ON_CLIENT] = true;
+    call.startBatch(client_batch, function(err, response) {
+      if (err) {
+        callback(err);
+        return;
+      }
+      if (response.status.code != grpc.status.OK) {
+        callback(response.status);
+        return;
+      }
+      emitter.emit('status', response.status);
+      emitter.emit('metadata', response.metadata);
+      callback(null, deserialize(response.read));
+    });
+    return emitter;
+  }
+  return makeUnaryRequest;
+}
 
 /**
- * Cancel the ongoing call. If the call has not already finished, it will finish
- * with status CANCELLED.
+ * Get a function that can make client stream requests to the specified method.
+ * @param {string} method The name of the method to request
+ * @param {function(*):Buffer} serialize The serialization function for inputs
+ * @param {function(Buffer)} deserialize The deserialization function for
+ *     outputs
+ * @return {Function} makeClientStreamRequest
  */
-GrpcClientStream.prototype.cancel = function() {
-  this._call.cancel();
-};
+function makeClientStreamRequestFunction(method, serialize, deserialize) {
+  /**
+   * Make a client stream request with this method on the given channel with the
+   * given callback, etc.
+   * @this {Client} Client object. Must have a channel member.
+   * @param {function(?Error, value=)} callback The callback to for when the
+   *     response is received
+   * @param {array=} metadata Array of metadata key/value pairs to add to the
+   *     call
+   * @param {(number|Date)=} deadline The deadline for processing this request.
+   *     Defaults to infinite future
+   * @return {EventEmitter} An event emitter for stream related events
+   */
+  function makeClientStreamRequest(callback, metadata, deadline) {
+    if (deadline === undefined) {
+      deadline = Infinity;
+    }
+    var call = new grpc.Call(this.channel, method, deadline);
+    if (metadata === null || metadata === undefined) {
+      metadata = {};
+    }
+    var stream = new ClientWritableStream(call, serialize);
+    var metadata_batch = {};
+    metadata_batch[grpc.opType.SEND_INITIAL_METADATA] = metadata;
+    metadata_batch[grpc.opType.RECV_INITIAL_METADATA] = true;
+    call.startBatch(metadata_batch, function(err, response) {
+      if (err) {
+        callback(err);
+        return;
+      }
+      stream.emit('metadata', response.metadata);
+    });
+    var client_batch = {};
+    client_batch[grpc.opType.RECV_MESSAGE] = true;
+    client_batch[grpc.opType.RECV_STATUS_ON_CLIENT] = true;
+    call.startBatch(client_batch, function(err, response) {
+      if (err) {
+        callback(err);
+        return;
+      }
+      if (response.status.code != grpc.status.OK) {
+        callback(response.status);
+        return;
+      }
+      stream.emit('status', response.status);
+      callback(null, deserialize(response.read));
+    });
+    return stream;
+  }
+  return makeClientStreamRequest;
+}
 
 /**
- * Make a request on the channel to the given method with the given arguments
- * @param {grpc.Channel} channel The channel on which to make the request
- * @param {string} method The method to request
- * @param {function(*):Buffer} serialize Serialization function for requests
- * @param {function(Buffer):*} deserialize Deserialization function for
- *     responses
- * @param {array=} metadata Array of metadata key/value pairs to add to the call
- * @param {(number|Date)=} deadline The deadline for processing this request.
- *     Defaults to infinite future.
- * @return {stream=} The stream of responses
+ * Get a function that can make server stream requests to the specified method.
+ * @param {string} method The name of the method to request
+ * @param {function(*):Buffer} serialize The serialization function for inputs
+ * @param {function(Buffer)} deserialize The deserialization function for
+ *     outputs
+ * @return {Function} makeServerStreamRequest
  */
-function makeRequest(channel,
-                     method,
-                     serialize,
-                     deserialize,
-                     metadata,
-                     deadline) {
-  if (deadline === undefined) {
-    deadline = Infinity;
+function makeServerStreamRequestFunction(method, serialize, deserialize) {
+  /**
+   * Make a server stream request with this method on the given channel with the
+   * given argument, etc.
+   * @this {SurfaceClient} Client object. Must have a channel member.
+   * @param {*} argument The argument to the call. Should be serializable with
+   *     serialize
+   * @param {array=} metadata Array of metadata key/value pairs to add to the
+   *     call
+   * @param {(number|Date)=} deadline The deadline for processing this request.
+   *     Defaults to infinite future
+   * @return {EventEmitter} An event emitter for stream related events
+   */
+  function makeServerStreamRequest(argument, metadata, deadline) {
+    if (deadline === undefined) {
+      deadline = Infinity;
+    }
+    var call = new grpc.Call(this.channel, method, deadline);
+    if (metadata === null || metadata === undefined) {
+      metadata = {};
+    }
+    var stream = new ClientReadableStream(call, deserialize);
+    var start_batch = {};
+    start_batch[grpc.opType.SEND_INITIAL_METADATA] = metadata;
+    start_batch[grpc.opType.RECV_INITIAL_METADATA] = true;
+    start_batch[grpc.opType.SEND_MESSAGE] = serialize(argument);
+    start_batch[grpc.opType.SEND_CLOSE_FROM_CLIENT] = true;
+    call.startBatch(start_batch, function(err, response) {
+      if (err) {
+        throw err;
+      }
+      stream.emit('metadata', response.metadata);
+    });
+    var status_batch = {};
+    status_batch[grpc.opType.RECV_STATUS_ON_CLIENT] = true;
+    call.startBatch(status_batch, function(err, response) {
+      if (err) {
+        throw err;
+      }
+      stream.emit('status', response.status);
+    });
+    return stream;
   }
-  var call = new grpc.Call(channel, method, deadline);
-  if (metadata) {
-    call.addMetadata(metadata);
+  return makeServerStreamRequest;
+}
+
+/**
+ * Get a function that can make bidirectional stream requests to the specified
+ * method.
+ * @param {string} method The name of the method to request
+ * @param {function(*):Buffer} serialize The serialization function for inputs
+ * @param {function(Buffer)} deserialize The deserialization function for
+ *     outputs
+ * @return {Function} makeBidiStreamRequest
+ */
+function makeBidiStreamRequestFunction(method, serialize, deserialize) {
+  /**
+   * Make a bidirectional stream request with this method on the given channel.
+   * @this {SurfaceClient} Client object. Must have a channel member.
+   * @param {array=} metadata Array of metadata key/value pairs to add to the
+   *     call
+   * @param {(number|Date)=} deadline The deadline for processing this request.
+   *     Defaults to infinite future
+   * @return {EventEmitter} An event emitter for stream related events
+   */
+  function makeBidiStreamRequest(metadata, deadline) {
+    if (deadline === undefined) {
+      deadline = Infinity;
+    }
+    var call = new grpc.Call(this.channel, method, deadline);
+    if (metadata === null || metadata === undefined) {
+      metadata = {};
+    }
+    var stream = new ClientDuplexStream(call, serialize, deserialize);
+    var start_batch = {};
+    start_batch[grpc.opType.SEND_INITIAL_METADATA] = metadata;
+    start_batch[grpc.opType.RECV_INITIAL_METADATA] = true;
+    call.startBatch(start_batch, function(err, response) {
+      if (err) {
+        throw err;
+      }
+      stream.emit('metadata', response.metadata);
+    });
+    var status_batch = {};
+    status_batch[grpc.opType.RECV_STATUS_ON_CLIENT] = true;
+    call.startBatch(status_batch, function(err, response) {
+      if (err) {
+        throw err;
+      }
+      stream.emit('status', response.status);
+    });
+    return stream;
   }
-  return new GrpcClientStream(call, serialize, deserialize);
+  return makeBidiStreamRequest;
 }
 
+
 /**
- * See documentation for makeRequest above
+ * Map with short names for each of the requester maker functions. Used in
+ * makeClientConstructor
  */
-exports.makeRequest = makeRequest;
+var requester_makers = {
+  unary: makeUnaryRequestFunction,
+  server_stream: makeServerStreamRequestFunction,
+  client_stream: makeClientStreamRequestFunction,
+  bidi: makeBidiStreamRequestFunction
+};
 
 /**
- * Represents a client side gRPC channel associated with a single host.
+ * Creates a constructor for clients for the given service
+ * @param {ProtoBuf.Reflect.Service} service The service to generate a client
+ *     for
+ * @return {function(string, Object)} New client constructor
  */
-exports.Channel = grpc.Channel;
+function makeClientConstructor(service) {
+  var prefix = '/' + common.fullyQualifiedName(service) + '/';
+  /**
+   * Create a client with the given methods
+   * @constructor
+   * @param {string} address The address of the server to connect to
+   * @param {Object} options Options to pass to the underlying channel
+   */
+  function Client(address, options) {
+    this.channel = new grpc.Channel(address, options);
+  }
+
+  _.each(service.children, function(method) {
+    var method_type;
+    if (method.requestStream) {
+      if (method.responseStream) {
+        method_type = 'bidi';
+      } else {
+        method_type = 'client_stream';
+      }
+    } else {
+      if (method.responseStream) {
+        method_type = 'server_stream';
+      } else {
+        method_type = 'unary';
+      }
+    }
+    Client.prototype[decapitalize(method.name)] =
+        requester_makers[method_type](
+            prefix + capitalize(method.name),
+            common.serializeCls(method.resolvedRequestType.build()),
+            common.deserializeCls(method.resolvedResponseType.build()));
+  });
+
+  Client.service = service;
+
+  return Client;
+}
+
+exports.makeClientConstructor = makeClientConstructor;
+
 /**
- * Status name to code number mapping
+ * See docs for client.status
  */
 exports.status = grpc.status;
 /**
- * Call error name to code number mapping
+ * See docs for client.callError
  */
 exports.callError = grpc.callError;
diff --git a/src/node/src/common.js b/src/node/src/common.js
index 54247e3fa1..7560cf1bdd 100644
--- a/src/node/src/common.js
+++ b/src/node/src/common.js
@@ -31,6 +31,8 @@
  *
  */
 
+var _ = require('underscore');
+
 var capitalize = require('underscore.string/capitalize');
 
 /**
@@ -88,6 +90,24 @@ function fullyQualifiedName(value) {
 }
 
 /**
+ * Wrap a function to pass null-like values through without calling it. If no
+ * function is given, just uses the identity;
+ * @param {?function} func The function to wrap
+ * @return {function} The wrapped function
+ */
+function wrapIgnoreNull(func) {
+  if (!func) {
+    return _.identity;
+  }
+  return function(arg) {
+    if (arg === null || arg === undefined) {
+      return null;
+    }
+    return func(arg);
+  };
+}
+
+/**
  * See docs for deserializeCls
  */
 exports.deserializeCls = deserializeCls;
@@ -101,3 +121,8 @@ exports.serializeCls = serializeCls;
  * See docs for fullyQualifiedName
  */
 exports.fullyQualifiedName = fullyQualifiedName;
+
+/**
+ * See docs for wrapIgnoreNull
+ */
+exports.wrapIgnoreNull = wrapIgnoreNull;
diff --git a/src/node/src/server.js b/src/node/src/server.js
index e4f71ff05f..48c349ef99 100644
--- a/src/node/src/server.js
+++ b/src/node/src/server.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2014, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,80 +33,108 @@
 
 var _ = require('underscore');
 
+var capitalize = require('underscore.string/capitalize');
+var decapitalize = require('underscore.string/decapitalize');
+
 var grpc = require('bindings')('grpc.node');
 
 var common = require('./common');
 
-var Duplex = require('stream').Duplex;
+var stream = require('stream');
+
+var Readable = stream.Readable;
+var Writable = stream.Writable;
+var Duplex = stream.Duplex;
 var util = require('util');
 
-util.inherits(GrpcServerStream, Duplex);
+var EventEmitter = require('events').EventEmitter;
+
+var common = require('./common.js');
 
 /**
- * Class for representing a gRPC server side stream as a Node stream. Extends
- * from stream.Duplex.
- * @constructor
- * @param {grpc.Call} call Call object to proxy
- * @param {function(*):Buffer=} serialize Serialization function for responses
- * @param {function(Buffer):*=} deserialize Deserialization function for
- *     requests
+ * Handle an error on a call by sending it as a status
+ * @param {grpc.Call} call The call to send the error on
+ * @param {Object} error The error object
  */
-function GrpcServerStream(call, serialize, deserialize) {
-  Duplex.call(this, {objectMode: true});
-  if (!serialize) {
-    serialize = function(value) {
-      return value;
-    };
-  }
-  if (!deserialize) {
-    deserialize = function(value) {
-      return value;
-    };
-  }
-  this._call = call;
-  // Indicate that a status has been sent
-  var finished = false;
-  var self = this;
+function handleError(call, error) {
   var status = {
-    'code' : grpc.status.OK,
-    'details' : 'OK'
+    code: grpc.status.INTERNAL,
+    details: 'Unknown Error',
+    metadata: {}
   };
-
-  /**
-   * Serialize a response value to a buffer. Always maps null to null. Otherwise
-   * uses the provided serialize function
-   * @param {*} value The value to serialize
-   * @return {Buffer} The serialized value
-   */
-  this.serialize = function(value) {
-    if (value === null || value === undefined) {
-      return null;
+  if (error.hasOwnProperty('message')) {
+    status.details = error.message;
+  }
+  if (error.hasOwnProperty('code')) {
+    status.code = error.code;
+    if (error.hasOwnProperty('details')) {
+      status.details = error.details;
     }
-    return serialize(value);
-  };
+  }
+  var error_batch = {};
+  error_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = status;
+  call.startBatch(error_batch, function(){});
+}
 
-  /**
-   * Deserialize a request buffer to a value. Always maps null to null.
-   * Otherwise uses the provided deserialize function.
-   * @param {Buffer} buffer The buffer to deserialize
-   * @return {*} The deserialized value
-   */
-  this.deserialize = function(buffer) {
-    if (buffer === null) {
-      return null;
+/**
+ * Wait for the client to close, then emit a cancelled event if the client
+ * cancelled.
+ * @param {grpc.Call} call The call object to wait on
+ * @param {EventEmitter} emitter The event emitter to emit the cancelled event
+ *     on
+ */
+function waitForCancel(call, emitter) {
+  var cancel_batch = {};
+  cancel_batch[grpc.opType.RECV_CLOSE_ON_SERVER] = true;
+  call.startBatch(cancel_batch, function(err, result) {
+    if (err) {
+      emitter.emit('error', err);
     }
-    return deserialize(buffer);
+    if (result.cancelled) {
+      emitter.cancelled = true;
+      emitter.emit('cancelled');
+    }
+  });
+}
+
+/**
+ * Send a response to a unary or client streaming call.
+ * @param {grpc.Call} call The call to respond on
+ * @param {*} value The value to respond with
+ * @param {function(*):Buffer=} serialize Serialization function for the
+ *     response
+ */
+function sendUnaryResponse(call, value, serialize) {
+  var end_batch = {};
+  end_batch[grpc.opType.SEND_MESSAGE] = serialize(value);
+  end_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
+    code: grpc.status.OK,
+    details: 'OK',
+    metadata: {}
   };
+  call.startBatch(end_batch, function (){});
+}
 
-  /**
-   * Send the pending status
-   */
+/**
+ * Initialize a writable stream. This is used for both the writable and duplex
+ * stream constructors.
+ * @param {Writable} stream The stream to set up
+ * @param {function(*):Buffer=} Serialization function for responses
+ */
+function setUpWritable(stream, serialize) {
+  stream.finished = false;
+  stream.status = {
+    code : grpc.status.OK,
+    details : 'OK',
+    metadata : {}
+  };
+  stream.serialize = common.wrapIgnoreNull(serialize);
   function sendStatus() {
-    call.startWriteStatus(status.code, status.details, function() {
-    });
-    finished = true;
+    var batch = {};
+    batch[grpc.opType.SEND_STATUS_FROM_SERVER] = stream.status;
+    stream.call.startBatch(batch, function(){});
   }
-  this.on('finish', sendStatus);
+  stream.on('finish', sendStatus);
   /**
    * Set the pending status to a given error status. If the error does not have
    * code or details properties, the code will be set to grpc.status.INTERNAL
@@ -116,14 +144,16 @@ function GrpcServerStream(call, serialize, deserialize) {
   function setStatus(err) {
     var code = grpc.status.INTERNAL;
     var details = 'Unknown Error';
-
+    if (err.hasOwnProperty('message')) {
+      details = err.message;
+    }
     if (err.hasOwnProperty('code')) {
       code = err.code;
       if (err.hasOwnProperty('details')) {
         details = err.details;
       }
     }
-    status = {'code': code, 'details': details};
+    stream.status = {code: code, details: details, metadata: {}};
   }
   /**
    * Terminate the call. This includes indicating that reads are done, draining
@@ -133,69 +163,250 @@ function GrpcServerStream(call, serialize, deserialize) {
    */
   function terminateCall(err) {
     // Drain readable data
-    this.on('data', function() {});
     setStatus(err);
-    this.end();
+    stream.end();
   }
-  this.on('error', terminateCall);
-  // Indicates that a read is pending
-  var reading = false;
+  stream.on('error', terminateCall);
+}
+
+/**
+ * Initialize a readable stream. This is used for both the readable and duplex
+ * stream constructors.
+ * @param {Readable} stream The stream to initialize
+ * @param {function(Buffer):*=} deserialize Deserialization function for
+ *     incoming data.
+ */
+function setUpReadable(stream, deserialize) {
+  stream.deserialize = common.wrapIgnoreNull(deserialize);
+  stream.finished = false;
+  stream.reading = false;
+
+  stream.terminate = function() {
+    stream.finished = true;
+    stream.on('data', function() {});
+  };
+
+  stream.on('cancelled', function() {
+    stream.terminate();
+  });
+}
+
+util.inherits(ServerWritableStream, Writable);
+
+/**
+ * A stream that the server can write to. Used for calls that are streaming from
+ * the server side.
+ * @constructor
+ * @param {grpc.Call} call The call object to send data with
+ * @param {function(*):Buffer=} serialize Serialization function for writes
+ */
+function ServerWritableStream(call, serialize) {
+  Writable.call(this, {objectMode: true});
+  this.call = call;
+
+  this.finished = false;
+  setUpWritable(this, serialize);
+}
+
+/**
+ * Start writing a chunk of data. This is an implementation of a method required
+ * for implementing stream.Writable.
+ * @param {Buffer} chunk The chunk of data to write
+ * @param {string} encoding Ignored
+ * @param {function(Error=)} callback Callback to indicate that the write is
+ *     complete
+ */
+function _write(chunk, encoding, callback) {
+  var batch = {};
+  batch[grpc.opType.SEND_MESSAGE] = this.serialize(chunk);
+  this.call.startBatch(batch, function(err, value) {
+    if (err) {
+      this.emit('error', err);
+      return;
+    }
+    callback();
+  });
+}
+
+ServerWritableStream.prototype._write = _write;
+
+util.inherits(ServerReadableStream, Readable);
+
+/**
+ * A stream that the server can read from. Used for calls that are streaming
+ * from the client side.
+ * @constructor
+ * @param {grpc.Call} call The call object to read data with
+ * @param {function(Buffer):*=} deserialize Deserialization function for reads
+ */
+function ServerReadableStream(call, deserialize) {
+  Readable.call(this, {objectMode: true});
+  this.call = call;
+  setUpReadable(this, deserialize);
+}
+
+/**
+ * Start reading from the gRPC data source. This is an implementation of a
+ * method required for implementing stream.Readable
+ * @param {number} size Ignored
+ */
+function _read(size) {
+  var self = this;
   /**
    * Callback to be called when a READ event is received. Pushes the data onto
    * the read queue and starts reading again if applicable
    * @param {grpc.Event} event READ event object
    */
-  function readCallback(event) {
-    if (finished) {
+  function readCallback(err, event) {
+    if (err) {
+      self.terminate();
+      return;
+    }
+    if (self.finished) {
       self.push(null);
       return;
     }
-    var data = event.data;
+    var data = event.read;
     if (self.push(self.deserialize(data)) && data != null) {
-      self._call.startRead(readCallback);
+      var read_batch = {};
+      read_batch[grpc.opType.RECV_MESSAGE] = true;
+      self.call.startBatch(read_batch, readCallback);
     } else {
-      reading = false;
+      self.reading = false;
     }
   }
-  /**
-   * Start reading if there is not already a pending read. Reading will
-   * continue until self.push returns false (indicating reads should slow
-   * down) or the read data is null (indicating that there is no more data).
-   */
-  this.startReading = function() {
-    if (finished) {
-      self.push(null);
-    } else {
-      if (!reading) {
-        reading = true;
-        self._call.startRead(readCallback);
+  if (self.finished) {
+    self.push(null);
+  } else {
+    if (!self.reading) {
+      self.reading = true;
+      var batch = {};
+      batch[grpc.opType.RECV_MESSAGE] = true;
+      self.call.startBatch(batch, readCallback);
+    }
+  }
+}
+
+ServerReadableStream.prototype._read = _read;
+
+util.inherits(ServerDuplexStream, Duplex);
+
+/**
+ * A stream that the server can read from or write to. Used for calls with
+ * duplex streaming.
+ * @constructor
+ * @param {grpc.Call} call Call object to proxy
+ * @param {function(*):Buffer=} serialize Serialization function for requests
+ * @param {function(Buffer):*=} deserialize Deserialization function for
+ *     responses
+ */
+function ServerDuplexStream(call, serialize, deserialize) {
+  Duplex.call(this, {objectMode: true});
+  this.call = call;
+  setUpWritable(this, serialize);
+  setUpReadable(this, deserialize);
+}
+
+ServerDuplexStream.prototype._read = _read;
+ServerDuplexStream.prototype._write = _write;
+
+/**
+ * Fully handle a unary call
+ * @param {grpc.Call} call The call to handle
+ * @param {Object} handler Request handler object for the method that was called
+ * @param {Object} metadata Metadata from the client
+ */
+function handleUnary(call, handler, metadata) {
+  var emitter = new EventEmitter();
+  emitter.on('error', function(error) {
+    handleError(call, error);
+  });
+  waitForCancel(call, emitter);
+  var batch = {};
+  batch[grpc.opType.SEND_INITIAL_METADATA] = metadata;
+  batch[grpc.opType.RECV_MESSAGE] = true;
+  call.startBatch(batch, function(err, result) {
+    if (err) {
+      handleError(call, err);
+      return;
+    }
+    emitter.request = handler.deserialize(result.read);
+    if (emitter.cancelled) {
+      return;
+    }
+    handler.func(emitter, function sendUnaryData(err, value) {
+      if (err) {
+        handleError(call, err);
       }
+      sendUnaryResponse(call, value, handler.serialize);
+    });
+  });
+}
+
+/**
+ * Fully handle a server streaming call
+ * @param {grpc.Call} call The call to handle
+ * @param {Object} handler Request handler object for the method that was called
+ * @param {Object} metadata Metadata from the client
+ */
+function handleServerStreaming(call, handler, metadata) {
+  var stream = new ServerWritableStream(call, handler.serialize);
+  waitForCancel(call, stream);
+  var batch = {};
+  batch[grpc.opType.SEND_INITIAL_METADATA] = metadata;
+  batch[grpc.opType.RECV_MESSAGE] = true;
+  call.startBatch(batch, function(err, result) {
+    if (err) {
+      stream.emit('error', err);
+      return;
     }
-  };
+    stream.request = handler.deserialize(result.read);
+    handler.func(stream);
+  });
 }
 
 /**
- * Start reading from the gRPC data source. This is an implementation of a
- * method required for implementing stream.Readable
- * @param {number} size Ignored
+ * Fully handle a client streaming call
+ * @param {grpc.Call} call The call to handle
+ * @param {Object} handler Request handler object for the method that was called
+ * @param {Object} metadata Metadata from the client
  */
-GrpcServerStream.prototype._read = function(size) {
-  this.startReading();
-};
+function handleClientStreaming(call, handler, metadata) {
+  var stream = new ServerReadableStream(call, handler.deserialize);
+  waitForCancel(call, stream);
+  var metadata_batch = {};
+  metadata_batch[grpc.opType.SEND_INITIAL_METADATA] = metadata;
+  call.startBatch(metadata_batch, function() {});
+  handler.func(stream, function(err, value) {
+    stream.terminate();
+    if (err) {
+      handleError(call, err);
+    }
+    sendUnaryResponse(call, value, handler.serialize);
+  });
+}
 
 /**
- * Start writing a chunk of data. This is an implementation of a method required
- * for implementing stream.Writable.
- * @param {Buffer} chunk The chunk of data to write
- * @param {string} encoding Ignored
- * @param {function(Error=)} callback Callback to indicate that the write is
- *     complete
+ * Fully handle a bidirectional streaming call
+ * @param {grpc.Call} call The call to handle
+ * @param {Object} handler Request handler object for the method that was called
+ * @param {Object} metadata Metadata from the client
  */
-GrpcServerStream.prototype._write = function(chunk, encoding, callback) {
-  var self = this;
-  self._call.startWrite(self.serialize(chunk), function(event) {
-    callback();
-  }, 0);
+function handleBidiStreaming(call, handler, metadata) {
+  var stream = new ServerDuplexStream(call, handler.serialize,
+                                      handler.deserialize);
+  waitForCancel(call, stream);
+  var metadata_batch = {};
+  metadata_batch[grpc.opType.SEND_INITIAL_METADATA] = metadata;
+  call.startBatch(metadata_batch, function() {});
+  handler.func(stream);
+}
+
+var streamHandlers = {
+  unary: handleUnary,
+  server_stream: handleServerStreaming,
+  client_stream: handleClientStreaming,
+  bidi: handleBidiStreaming
 };
 
 /**
@@ -218,7 +429,7 @@ function Server(getMetadata, options) {
    * Start the server and begin handling requests
    * @this Server
    */
-  this.start = function() {
+  this.listen = function() {
     console.log('Server starting');
     _.each(handlers, function(handler, handler_name) {
       console.log('Serving', handler_name);
@@ -233,48 +444,39 @@ function Server(getMetadata, options) {
      * wait for the next request
      * @param {grpc.Event} event The event to handle with tag SERVER_RPC_NEW
      */
-    function handleNewCall(event) {
-      var call = event.call;
-      var data = event.data;
-      if (data === null) {
+    function handleNewCall(err, event) {
+      if (err) {
+        return;
+      }
+      var details = event['new call'];
+      var call = details.call;
+      var method = details.method;
+      var metadata = details.metadata;
+      if (method === null) {
         return;
       }
       server.requestCall(handleNewCall);
       var handler = undefined;
-      var deadline = data.absolute_deadline;
-      var cancelled = false;
-      call.serverAccept(function(event) {
-        if (event.data.code === grpc.status.CANCELLED) {
-          cancelled = true;
-          if (stream) {
-            stream.emit('cancelled');
-          }
-        }
-      }, 0);
-      if (handlers.hasOwnProperty(data.method)) {
-        handler = handlers[data.method];
+      var deadline = details.deadline;
+      if (handlers.hasOwnProperty(method)) {
+        handler = handlers[method];
       } else {
-        call.serverEndInitialMetadata(0);
-        call.startWriteStatus(
-            grpc.status.UNIMPLEMENTED,
-            "This method is not available on this server.",
-            function() {});
+        var batch = {};
+        batch[grpc.opType.SEND_INITIAL_METADATA] = {};
+        batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
+          code: grpc.status.UNIMPLEMENTED,
+          details: "This method is not available on this server.",
+          metadata: {}
+        };
+        batch[grpc.opType.RECV_CLOSE_ON_SERVER] = true;
+        call.startBatch(batch, function() {});
         return;
       }
+      var response_metadata = {};
       if (getMetadata) {
-        call.addMetadata(getMetadata(data.method, data.metadata));
-      }
-      call.serverEndInitialMetadata(0);
-      var stream = new GrpcServerStream(call, handler.serialize,
-                                        handler.deserialize);
-      Object.defineProperty(stream, 'cancelled', {
-        get: function() { return cancelled;}
-      });
-      try {
-        handler.func(stream, data.metadata);
-      } catch (e) {
-        stream.emit('error', e);
+        response_metadata = getMetadata(method, metadata);
       }
+      streamHandlers[handler.type](call, handler, response_metadata);
     }
     server.requestCall(handleNewCall);
   };
@@ -294,17 +496,20 @@ function Server(getMetadata, options) {
  *     returns a stream of response values
  * @param {function(*):Buffer} serialize Serialization function for responses
  * @param {function(Buffer):*} deserialize Deserialization function for requests
+ * @param {string} type The streaming type of method that this handles
  * @return {boolean} True if the handler was set. False if a handler was already
  *     set for that name.
  */
-Server.prototype.register = function(name, handler, serialize, deserialize) {
+Server.prototype.register = function(name, handler, serialize, deserialize,
+                                     type) {
   if (this.handlers.hasOwnProperty(name)) {
     return false;
   }
   this.handlers[name] = {
     func: handler,
     serialize: serialize,
-    deserialize: deserialize
+    deserialize: deserialize,
+    type: type
   };
   return true;
 };
@@ -324,6 +529,110 @@ Server.prototype.bind = function(port, secure) {
 };
 
 /**
- * See documentation for Server
+ * Creates a constructor for servers with a service defined by the methods
+ * object. The methods object has string keys and values of this form:
+ * {serialize: function, deserialize: function, client_stream: bool,
+ *  server_stream: bool}
+ * @param {Object} methods Method descriptor for each method the server should
+ *     expose
+ * @param {string} prefix The prefex to prepend to each method name
+ * @return {function(Object, Object)} New server constructor
+ */
+function makeServerConstructor(services) {
+  var qual_names = [];
+  _.each(services, function(service) {
+    _.each(service.children, function(method) {
+      var name = common.fullyQualifiedName(method);
+      if (_.indexOf(qual_names, name) !== -1) {
+        throw new Error('Method ' + name + ' exposed by more than one service');
+      }
+      qual_names.push(name);
+    });
+  });
+  /**
+   * Create a server with the given handlers for all of the methods.
+   * @constructor
+   * @param {Object} service_handlers Map from service names to map from method
+   *     names to handlers
+   * @param {function(string, Object<string, Array<Buffer>>):
+             Object<string, Array<Buffer|string>>=} getMetadata Callback that
+   *     gets metatada for a given method
+   * @param {Object=} options Options to pass to the underlying server
+   */
+  function SurfaceServer(service_handlers, getMetadata, options) {
+    var server = new Server(getMetadata, options);
+    this.inner_server = server;
+    _.each(services, function(service) {
+      var service_name = common.fullyQualifiedName(service);
+      if (service_handlers[service_name] === undefined) {
+        throw new Error('Handlers for service ' +
+            service_name + ' not provided.');
+      }
+      var prefix = '/' + common.fullyQualifiedName(service) + '/';
+      _.each(service.children, function(method) {
+        var method_type;
+        if (method.requestStream) {
+          if (method.responseStream) {
+            method_type = 'bidi';
+          } else {
+            method_type = 'client_stream';
+          }
+        } else {
+          if (method.responseStream) {
+            method_type = 'server_stream';
+          } else {
+            method_type = 'unary';
+          }
+        }
+        if (service_handlers[service_name][decapitalize(method.name)] ===
+            undefined) {
+          throw new Error('Method handler for ' +
+              common.fullyQualifiedName(method) + ' not provided.');
+        }
+        var serialize = common.serializeCls(
+            method.resolvedResponseType.build());
+        var deserialize = common.deserializeCls(
+            method.resolvedRequestType.build());
+        server.register(
+            prefix + capitalize(method.name),
+            service_handlers[service_name][decapitalize(method.name)],
+            serialize, deserialize, method_type);
+      });
+    }, this);
+  }
+
+  /**
+   * Binds the server to the given port, with SSL enabled if secure is specified
+   * @param {string} port The port that the server should bind on, in the format
+   *     "address:port"
+   * @param {boolean=} secure Whether the server should open a secure port
+   * @return {SurfaceServer} this
+   */
+  SurfaceServer.prototype.bind = function(port, secure) {
+    return this.inner_server.bind(port, secure);
+  };
+
+  /**
+   * Starts the server listening on any bound ports
+   * @return {SurfaceServer} this
+   */
+  SurfaceServer.prototype.listen = function() {
+    this.inner_server.listen();
+    return this;
+  };
+
+  /**
+   * Shuts the server down; tells it to stop listening for new requests and to
+   * kill old requests.
+   */
+  SurfaceServer.prototype.shutdown = function() {
+    this.inner_server.shutdown();
+  };
+
+  return SurfaceServer;
+}
+
+/**
+ * See documentation for makeServerConstructor
  */
-module.exports = Server;
+exports.makeServerConstructor = makeServerConstructor;
diff --git a/src/node/src/surface_client.js b/src/node/src/surface_client.js
deleted file mode 100644
index 16c31809f4..0000000000
--- a/src/node/src/surface_client.js
+++ /dev/null
@@ -1,357 +0,0 @@
-/*
- *
- * Copyright 2014, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-var _ = require('underscore');
-
-var capitalize = require('underscore.string/capitalize');
-var decapitalize = require('underscore.string/decapitalize');
-
-var client = require('./client.js');
-
-var common = require('./common.js');
-
-var EventEmitter = require('events').EventEmitter;
-
-var stream = require('stream');
-
-var Readable = stream.Readable;
-var Writable = stream.Writable;
-var Duplex = stream.Duplex;
-var util = require('util');
-
-
-function forwardEvent(fromEmitter, toEmitter, event) {
-  fromEmitter.on(event, function forward() {
-    _.partial(toEmitter.emit, event).apply(toEmitter, arguments);
-  });
-}
-
-util.inherits(ClientReadableObjectStream, Readable);
-
-/**
- * Class for representing a gRPC server streaming call as a Node stream on the
- * client side. Extends from stream.Readable.
- * @constructor
- * @param {stream} stream Underlying binary Duplex stream for the call
- */
-function ClientReadableObjectStream(stream) {
-  var options = {objectMode: true};
-  Readable.call(this, options);
-  this._stream = stream;
-  var self = this;
-  forwardEvent(stream, this, 'status');
-  forwardEvent(stream, this, 'metadata');
-  this._stream.on('data', function forwardData(chunk) {
-    if (!self.push(chunk)) {
-      self._stream.pause();
-    }
-  });
-  this._stream.pause();
-}
-
-/**
- * _read implementation for both types of streams that allow reading.
- * @this {ClientReadableObjectStream}
- * @param {number} size Ignored
- */
-function _read(size) {
-  this._stream.resume();
-}
-
-/**
- * See docs for _read
- */
-ClientReadableObjectStream.prototype._read = _read;
-
-util.inherits(ClientWritableObjectStream, Writable);
-
-/**
- * Class for representing a gRPC client streaming call as a Node stream on the
- * client side. Extends from stream.Writable.
- * @constructor
- * @param {stream} stream Underlying binary Duplex stream for the call
- */
-function ClientWritableObjectStream(stream) {
-  var options = {objectMode: true};
-  Writable.call(this, options);
-  this._stream = stream;
-  forwardEvent(stream, this, 'status');
-  forwardEvent(stream, this, 'metadata');
-  this.on('finish', function() {
-    this._stream.end();
-  });
-}
-
-/**
- * _write implementation for both types of streams that allow writing
- * @this {ClientWritableObjectStream}
- * @param {*} chunk The value to write to the stream
- * @param {string} encoding Ignored
- * @param {function(Error)} callback Callback to call when finished writing
- */
-function _write(chunk, encoding, callback) {
-  this._stream.write(chunk, encoding, callback);
-}
-
-/**
- * See docs for _write
- */
-ClientWritableObjectStream.prototype._write = _write;
-
-/**
- * Cancel the underlying call
- */
-function cancel() {
-  this._stream.cancel();
-}
-
-ClientReadableObjectStream.prototype.cancel = cancel;
-ClientWritableObjectStream.prototype.cancel = cancel;
-
-/**
- * Get a function that can make unary requests to the specified method.
- * @param {string} method The name of the method to request
- * @param {function(*):Buffer} serialize The serialization function for inputs
- * @param {function(Buffer)} deserialize The deserialization function for
- *     outputs
- * @return {Function} makeUnaryRequest
- */
-function makeUnaryRequestFunction(method, serialize, deserialize) {
-  /**
-   * Make a unary request with this method on the given channel with the given
-   * argument, callback, etc.
-   * @this {SurfaceClient} Client object. Must have a channel member.
-   * @param {*} argument The argument to the call. Should be serializable with
-   *     serialize
-   * @param {function(?Error, value=)} callback The callback to for when the
-   *     response is received
-   * @param {array=} metadata Array of metadata key/value pairs to add to the
-   *     call
-   * @param {(number|Date)=} deadline The deadline for processing this request.
-   *     Defaults to infinite future
-   * @return {EventEmitter} An event emitter for stream related events
-   */
-  function makeUnaryRequest(argument, callback, metadata, deadline) {
-    var stream = client.makeRequest(this.channel, method, serialize,
-                                    deserialize, metadata, deadline);
-    var emitter = new EventEmitter();
-    emitter.cancel = function cancel() {
-      stream.cancel();
-    };
-    forwardEvent(stream, emitter, 'status');
-    forwardEvent(stream, emitter, 'metadata');
-    stream.write(argument);
-    stream.end();
-    stream.on('data', function forwardData(chunk) {
-      try {
-        callback(null, chunk);
-      } catch (e) {
-        callback(e);
-      }
-    });
-    stream.on('status', function forwardStatus(status) {
-      if (status.code !== client.status.OK) {
-        callback(status);
-      }
-    });
-    return emitter;
-  }
-  return makeUnaryRequest;
-}
-
-/**
- * Get a function that can make client stream requests to the specified method.
- * @param {string} method The name of the method to request
- * @param {function(*):Buffer} serialize The serialization function for inputs
- * @param {function(Buffer)} deserialize The deserialization function for
- *     outputs
- * @return {Function} makeClientStreamRequest
- */
-function makeClientStreamRequestFunction(method, serialize, deserialize) {
-  /**
-   * Make a client stream request with this method on the given channel with the
-   * given callback, etc.
-   * @this {SurfaceClient} Client object. Must have a channel member.
-   * @param {function(?Error, value=)} callback The callback to for when the
-   *     response is received
-   * @param {array=} metadata Array of metadata key/value pairs to add to the
-   *     call
-   * @param {(number|Date)=} deadline The deadline for processing this request.
-   *     Defaults to infinite future
-   * @return {EventEmitter} An event emitter for stream related events
-   */
-  function makeClientStreamRequest(callback, metadata, deadline) {
-    var stream = client.makeRequest(this.channel, method, serialize,
-                                    deserialize, metadata, deadline);
-    var obj_stream = new ClientWritableObjectStream(stream);
-    stream.on('data', function forwardData(chunk) {
-      try {
-        callback(null, chunk);
-      } catch (e) {
-        callback(e);
-      }
-    });
-    stream.on('status', function forwardStatus(status) {
-      if (status.code !== client.status.OK) {
-        callback(status);
-      }
-    });
-    return obj_stream;
-  }
-  return makeClientStreamRequest;
-}
-
-/**
- * Get a function that can make server stream requests to the specified method.
- * @param {string} method The name of the method to request
- * @param {function(*):Buffer} serialize The serialization function for inputs
- * @param {function(Buffer)} deserialize The deserialization function for
- *     outputs
- * @return {Function} makeServerStreamRequest
- */
-function makeServerStreamRequestFunction(method, serialize, deserialize) {
-  /**
-   * Make a server stream request with this method on the given channel with the
-   * given argument, etc.
-   * @this {SurfaceClient} Client object. Must have a channel member.
-   * @param {*} argument The argument to the call. Should be serializable with
-   *     serialize
-   * @param {array=} metadata Array of metadata key/value pairs to add to the
-   *     call
-   * @param {(number|Date)=} deadline The deadline for processing this request.
-   *     Defaults to infinite future
-   * @return {EventEmitter} An event emitter for stream related events
-   */
-  function makeServerStreamRequest(argument, metadata, deadline) {
-    var stream = client.makeRequest(this.channel, method, serialize,
-                                    deserialize, metadata, deadline);
-    var obj_stream = new ClientReadableObjectStream(stream);
-    stream.write(argument);
-    stream.end();
-    return obj_stream;
-  }
-  return makeServerStreamRequest;
-}
-
-/**
- * Get a function that can make bidirectional stream requests to the specified
- * method.
- * @param {string} method The name of the method to request
- * @param {function(*):Buffer} serialize The serialization function for inputs
- * @param {function(Buffer)} deserialize The deserialization function for
- *     outputs
- * @return {Function} makeBidiStreamRequest
- */
-function makeBidiStreamRequestFunction(method, serialize, deserialize) {
-  /**
-   * Make a bidirectional stream request with this method on the given channel.
-   * @this {SurfaceClient} Client object. Must have a channel member.
-   * @param {array=} metadata Array of metadata key/value pairs to add to the
-   *     call
-   * @param {(number|Date)=} deadline The deadline for processing this request.
-   *     Defaults to infinite future
-   * @return {EventEmitter} An event emitter for stream related events
-   */
-  function makeBidiStreamRequest(metadata, deadline) {
-    return client.makeRequest(this.channel, method, serialize,
-                              deserialize, metadata, deadline);
-  }
-  return makeBidiStreamRequest;
-}
-
-/**
- * Map with short names for each of the requester maker functions. Used in
- * makeClientConstructor
- */
-var requester_makers = {
-  unary: makeUnaryRequestFunction,
-  server_stream: makeServerStreamRequestFunction,
-  client_stream: makeClientStreamRequestFunction,
-  bidi: makeBidiStreamRequestFunction
-}
-
-/**
- * Creates a constructor for clients for the given service
- * @param {ProtoBuf.Reflect.Service} service The service to generate a client
- *     for
- * @return {function(string, Object)} New client constructor
- */
-function makeClientConstructor(service) {
-  var prefix = '/' + common.fullyQualifiedName(service) + '/';
-  /**
-   * Create a client with the given methods
-   * @constructor
-   * @param {string} address The address of the server to connect to
-   * @param {Object} options Options to pass to the underlying channel
-   */
-  function SurfaceClient(address, options) {
-    this.channel = new client.Channel(address, options);
-  }
-
-  _.each(service.children, function(method) {
-    var method_type;
-    if (method.requestStream) {
-      if (method.responseStream) {
-        method_type = 'bidi';
-      } else {
-        method_type = 'client_stream';
-      }
-    } else {
-      if (method.responseStream) {
-        method_type = 'server_stream';
-      } else {
-        method_type = 'unary';
-      }
-    }
-    SurfaceClient.prototype[decapitalize(method.name)] =
-        requester_makers[method_type](
-            prefix + capitalize(method.name),
-            common.serializeCls(method.resolvedRequestType.build()),
-            common.deserializeCls(method.resolvedResponseType.build()));
-  });
-
-  SurfaceClient.service = service;
-
-  return SurfaceClient;
-}
-
-exports.makeClientConstructor = makeClientConstructor;
-
-/**
- * See docs for client.status
- */
-exports.status = client.status;
-/**
- * See docs for client.callError
- */
-exports.callError = client.callError;
diff --git a/src/node/src/surface_server.js b/src/node/src/surface_server.js
deleted file mode 100644
index a47d1fa23d..0000000000
--- a/src/node/src/surface_server.js
+++ /dev/null
@@ -1,340 +0,0 @@
-/*
- *
- * Copyright 2014, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-var _ = require('underscore');
-
-var capitalize = require('underscore.string/capitalize');
-var decapitalize = require('underscore.string/decapitalize');
-
-var Server = require('./server.js');
-
-var stream = require('stream');
-
-var Readable = stream.Readable;
-var Writable = stream.Writable;
-var Duplex = stream.Duplex;
-var util = require('util');
-
-var common = require('./common.js');
-
-util.inherits(ServerReadableObjectStream, Readable);
-
-/**
- * Class for representing a gRPC client streaming call as a Node stream on the
- * server side. Extends from stream.Readable.
- * @constructor
- * @param {stream} stream Underlying binary Duplex stream for the call
- */
-function ServerReadableObjectStream(stream) {
-  var options = {objectMode: true};
-  Readable.call(this, options);
-  this._stream = stream;
-  Object.defineProperty(this, 'cancelled', {
-    get: function() { return stream.cancelled; }
-  });
-  var self = this;
-  this._stream.on('cancelled', function() {
-    self.emit('cancelled');
-  });
-  this._stream.on('data', function forwardData(chunk) {
-    if (!self.push(chunk)) {
-      self._stream.pause();
-    }
-  });
-  this._stream.on('end', function forwardEnd() {
-    self.push(null);
-  });
-  this._stream.pause();
-}
-
-/**
- * _read implementation for both types of streams that allow reading.
- * @this {ServerReadableObjectStream|ServerBidiObjectStream}
- * @param {number} size Ignored
- */
-function _read(size) {
-  this._stream.resume();
-}
-
-/**
- * See docs for _read
- */
-ServerReadableObjectStream.prototype._read = _read;
-
-util.inherits(ServerWritableObjectStream, Writable);
-
-/**
- * Class for representing a gRPC server streaming call as a Node stream on the
- * server side. Extends from stream.Writable.
- * @constructor
- * @param {stream} stream Underlying binary Duplex stream for the call
- */
-function ServerWritableObjectStream(stream) {
-  var options = {objectMode: true};
-  Writable.call(this, options);
-  this._stream = stream;
-  this._stream.on('cancelled', function() {
-    self.emit('cancelled');
-  });
-  this.on('finish', function() {
-    this._stream.end();
-  });
-}
-
-/**
- * _write implementation for both types of streams that allow writing
- * @this {ServerWritableObjectStream}
- * @param {*} chunk The value to write to the stream
- * @param {string} encoding Ignored
- * @param {function(Error)} callback Callback to call when finished writing
- */
-function _write(chunk, encoding, callback) {
-  this._stream.write(chunk, encoding, callback);
-}
-
-/**
- * See docs for _write
- */
-ServerWritableObjectStream.prototype._write = _write;
-
-/**
- * Creates a binary stream handler function from a unary handler function
- * @param {function(Object, function(Error, *), metadata=)} handler Unary call
- *     handler
- * @return {function(stream, metadata=)} Binary stream handler
- */
-function makeUnaryHandler(handler) {
-  /**
-   * Handles a stream by reading a single data value, passing it to the handler,
-   * and writing the response back to the stream.
-   * @param {stream} stream Binary data stream
-   * @param {metadata=} metadata Incoming metadata array
-   */
-  return function handleUnaryCall(stream, metadata) {
-    stream.on('data', function handleUnaryData(value) {
-      var call = {request: value};
-      Object.defineProperty(call, 'cancelled', {
-        get: function() { return stream.cancelled;}
-      });
-      stream.on('cancelled', function() {
-        call.emit('cancelled');
-      });
-      handler(call, function sendUnaryData(err, value) {
-        if (err) {
-          stream.emit('error', err);
-        } else {
-          stream.write(value);
-          stream.end();
-        }
-      }, metadata);
-    });
-  };
-}
-
-/**
- * Creates a binary stream handler function from a client stream handler
- * function
- * @param {function(Readable, function(Error, *), metadata=)} handler Client
- *     stream call handler
- * @return {function(stream, metadata=)} Binary stream handler
- */
-function makeClientStreamHandler(handler) {
-  /**
-   * Handles a stream by passing a deserializing stream to the handler and
-   * writing the response back to the stream.
-   * @param {stream} stream Binary data stream
-   * @param {metadata=} metadata Incoming metadata array
-   */
-  return function handleClientStreamCall(stream, metadata) {
-    var object_stream = new ServerReadableObjectStream(stream);
-    handler(object_stream, function sendClientStreamData(err, value) {
-        if (err) {
-          stream.emit('error', err);
-        } else {
-          stream.write(value);
-          stream.end();
-        }
-    }, metadata);
-  };
-}
-
-/**
- * Creates a binary stream handler function from a server stream handler
- * function
- * @param {function(Writable, metadata=)} handler Server stream call handler
- * @return {function(stream, metadata=)} Binary stream handler
- */
-function makeServerStreamHandler(handler) {
-  /**
-   * Handles a stream by attaching it to a serializing stream, and passing it to
-   * the handler.
-   * @param {stream} stream Binary data stream
-   * @param {metadata=} metadata Incoming metadata array
-   */
-  return function handleServerStreamCall(stream, metadata) {
-    stream.on('data', function handleClientData(value) {
-      var object_stream = new ServerWritableObjectStream(stream);
-      object_stream.request = value;
-      handler(object_stream, metadata);
-    });
-  };
-}
-
-/**
- * Creates a binary stream handler function from a bidi stream handler function
- * @param {function(Duplex, metadata=)} handler Unary call handler
- * @return {function(stream, metadata=)} Binary stream handler
- */
-function makeBidiStreamHandler(handler) {
-  return handler;
-}
-
-/**
- * Map with short names for each of the handler maker functions. Used in
- * makeServerConstructor
- */
-var handler_makers = {
-  unary: makeUnaryHandler,
-  server_stream: makeServerStreamHandler,
-  client_stream: makeClientStreamHandler,
-  bidi: makeBidiStreamHandler
-};
-
-/**
- * Creates a constructor for servers with a service defined by the methods
- * object. The methods object has string keys and values of this form:
- * {serialize: function, deserialize: function, client_stream: bool,
- *  server_stream: bool}
- * @param {Object} methods Method descriptor for each method the server should
- *     expose
- * @param {string} prefix The prefex to prepend to each method name
- * @return {function(Object, Object)} New server constructor
- */
-function makeServerConstructor(services) {
-  var qual_names = [];
-  _.each(services, function(service) {
-    _.each(service.children, function(method) {
-      var name = common.fullyQualifiedName(method);
-      if (_.indexOf(qual_names, name) !== -1) {
-        throw new Error('Method ' + name + ' exposed by more than one service');
-      }
-      qual_names.push(name);
-    });
-  });
-  /**
-   * Create a server with the given handlers for all of the methods.
-   * @constructor
-   * @param {Object} service_handlers Map from service names to map from method
-   *     names to handlers
-   * @param {function(string, Object<string, Array<Buffer>>):
-             Object<string, Array<Buffer|string>>=} getMetadata Callback that
-   *     gets metatada for a given method
-   * @param {Object=} options Options to pass to the underlying server
-   */
-  function SurfaceServer(service_handlers, getMetadata, options) {
-    var server = new Server(getMetadata, options);
-    this.inner_server = server;
-    _.each(services, function(service) {
-      var service_name = common.fullyQualifiedName(service);
-      if (service_handlers[service_name] === undefined) {
-        throw new Error('Handlers for service ' +
-            service_name + ' not provided.');
-      }
-      var prefix = '/' + common.fullyQualifiedName(service) + '/';
-      _.each(service.children, function(method) {
-        var method_type;
-        if (method.requestStream) {
-          if (method.responseStream) {
-            method_type = 'bidi';
-          } else {
-            method_type = 'client_stream';
-          }
-        } else {
-          if (method.responseStream) {
-            method_type = 'server_stream';
-          } else {
-            method_type = 'unary';
-          }
-        }
-        if (service_handlers[service_name][decapitalize(method.name)] ===
-            undefined) {
-          throw new Error('Method handler for ' +
-              common.fullyQualifiedName(method) + ' not provided.');
-        }
-        var binary_handler = handler_makers[method_type](
-            service_handlers[service_name][decapitalize(method.name)]);
-        var serialize = common.serializeCls(
-            method.resolvedResponseType.build());
-        var deserialize = common.deserializeCls(
-            method.resolvedRequestType.build());
-        server.register(prefix + capitalize(method.name), binary_handler,
-                        serialize, deserialize);
-      });
-    }, this);
-  }
-
-  /**
-   * Binds the server to the given port, with SSL enabled if secure is specified
-   * @param {string} port The port that the server should bind on, in the format
-   *     "address:port"
-   * @param {boolean=} secure Whether the server should open a secure port
-   * @return {SurfaceServer} this
-   */
-  SurfaceServer.prototype.bind = function(port, secure) {
-    return this.inner_server.bind(port, secure);
-  };
-
-  /**
-   * Starts the server listening on any bound ports
-   * @return {SurfaceServer} this
-   */
-  SurfaceServer.prototype.listen = function() {
-    this.inner_server.start();
-    return this;
-  };
-
-  /**
-   * Shuts the server down; tells it to stop listening for new requests and to
-   * kill old requests.
-   */
-  SurfaceServer.prototype.shutdown = function() {
-    this.inner_server.shutdown();
-  };
-
-  return SurfaceServer;
-}
-
-/**
- * See documentation for makeServerConstructor
- */
-exports.makeServerConstructor = makeServerConstructor;
diff --git a/src/node/test/call_test.js b/src/node/test/call_test.js
index 48db245498..c1a7e95fa0 100644
--- a/src/node/test/call_test.js
+++ b/src/node/test/call_test.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2014, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -98,100 +98,80 @@ describe('call', function() {
       }, TypeError);
     });
   });
-  describe('addMetadata', function() {
-    it('should succeed with a map from strings to string arrays', function() {
+  describe('startBatch', function() {
+    it('should fail without an object and a function', function() {
       var call = new grpc.Call(channel, 'method', getDeadline(1));
-      assert.doesNotThrow(function() {
-        call.addMetadata({'key': ['value']});
+      assert.throws(function() {
+        call.startBatch();
       });
-      assert.doesNotThrow(function() {
-        call.addMetadata({'key1': ['value1'], 'key2': ['value2']});
+      assert.throws(function() {
+        call.startBatch({});
+      });
+      assert.throws(function() {
+        call.startBatch(null, function(){});
       });
     });
-    it('should succeed with a map from strings to buffer arrays', function() {
+    it('should succeed with an empty object', function(done) {
       var call = new grpc.Call(channel, 'method', getDeadline(1));
       assert.doesNotThrow(function() {
-        call.addMetadata({'key': [new Buffer('value')]});
-      });
-      assert.doesNotThrow(function() {
-        call.addMetadata({'key1': [new Buffer('value1')],
-                          'key2': [new Buffer('value2')]});
+        call.startBatch({}, function(err) {
+          assert.ifError(err);
+          done();
+        });
       });
     });
-    it('should fail with other parameter types', function() {
+  });
+  describe('startBatch with metadata', function() {
+    it('should succeed with a map of strings to string arrays', function(done) {
       var call = new grpc.Call(channel, 'method', getDeadline(1));
-      assert.throws(function() {
-        call.addMetadata();
+      assert.doesNotThrow(function() {
+        var batch = {};
+        batch[grpc.opType.SEND_INITIAL_METADATA] = {'key1': ['value1'],
+                                                    'key2': ['value2']};
+        call.startBatch(batch, function(err, resp) {
+          assert.ifError(err);
+          assert.deepEqual(resp, {'send metadata': true});
+          done();
+        });
       });
-      assert.throws(function() {
-        call.addMetadata(null);
-      }, TypeError);
-      assert.throws(function() {
-        call.addMetadata('value');
-      }, TypeError);
-      assert.throws(function() {
-        call.addMetadata(5);
-      }, TypeError);
     });
-    it.skip('should fail if invoke was already called', function(done) {
+    it('should succeed with a map of strings to buffer arrays', function(done) {
       var call = new grpc.Call(channel, 'method', getDeadline(1));
-      call.invoke(function() {},
-                  function() {done();},
-                  0);
-      assert.throws(function() {
-        call.addMetadata({'key': ['value']});
+      assert.doesNotThrow(function() {
+        var batch = {};
+        batch[grpc.opType.SEND_INITIAL_METADATA] = {
+          'key1': [new Buffer('value1')],
+          'key2': [new Buffer('value2')]
+        };
+        call.startBatch(batch, function(err, resp) {
+          assert.ifError(err);
+          assert.deepEqual(resp, {'send metadata': true});
+          done();
+        });
       });
-      // Cancel to speed up the test
-      call.cancel();
     });
-  });
-  describe('invoke', function() {
-    it('should fail with fewer than 3 arguments', function() {
+    it('should fail with other parameter types', function() {
       var call = new grpc.Call(channel, 'method', getDeadline(1));
       assert.throws(function() {
-        call.invoke();
-      }, TypeError);
-      assert.throws(function() {
-        call.invoke(function() {});
-      }, TypeError);
-      assert.throws(function() {
-        call.invoke(function() {},
-                    function() {});
-      }, TypeError);
-    });
-    it('should work with 2 args and an int', function(done) {
-      assert.doesNotThrow(function() {
-        var call = new grpc.Call(channel, 'method', getDeadline(1));
-        call.invoke(function() {},
-                    function() {done();},
-                    0);
-        // Cancel to speed up the test
-        call.cancel();
+        var batch = {};
+        batch[grpc.opType.SEND_INITIAL_METADATA] = undefined;
+        call.startBatch(batch, function(){});
       });
-    });
-    it('should reject incorrectly typed arguments', function() {
-      var call = new grpc.Call(channel, 'method', getDeadline(1));
       assert.throws(function() {
-        call.invoke(0, 0, 0);
+        var batch = {};
+        batch[grpc.opType.SEND_INITIAL_METADATA] = null;
+        call.startBatch(batch, function(){});
       }, TypeError);
       assert.throws(function() {
-        call.invoke(function() {},
-                    function() {}, 'test');
-      });
-    });
-  });
-  describe('serverAccept', function() {
-    it('should fail with fewer than 1 argument1', function() {
-      var call = new grpc.Call(channel, 'method', getDeadline(1));
-      assert.throws(function() {
-        call.serverAccept();
+        var batch = {};
+        batch[grpc.opType.SEND_INITIAL_METADATA] = 'value';
+        call.startBatch(batch, function(){});
       }, TypeError);
-    });
-    it.skip('should return an error when called on a client Call', function() {
-      var call = new grpc.Call(channel, 'method', getDeadline(1));
       assert.throws(function() {
-        call.serverAccept(function() {});
-      });
+        var batch = {};
+        batch[grpc.opType.SEND_INITIAL_METADATA] = 5;
+        call.startBatch(batch, function(){});
+      }, TypeError);
     });
   });
   describe('cancel', function() {
diff --git a/src/node/test/client_server_test.js b/src/node/test/client_server_test.js
deleted file mode 100644
index 1db9f69467..0000000000
--- a/src/node/test/client_server_test.js
+++ /dev/null
@@ -1,255 +0,0 @@
-/*
- *
- * Copyright 2014, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-var assert = require('assert');
-var fs = require('fs');
-var path = require('path');
-var grpc = require('bindings')('grpc.node');
-var Server = require('../src/server');
-var client = require('../src/client');
-var common = require('../src/common');
-
-var ca_path = path.join(__dirname, 'data/ca.pem');
-
-var key_path = path.join(__dirname, 'data/server1.key');
-
-var pem_path = path.join(__dirname, 'data/server1.pem');
-
-/**
- * Helper function to return an absolute deadline given a relative timeout in
- * seconds.
- * @param {number} timeout_secs The number of seconds to wait before timing out
- * @return {Date} A date timeout_secs in the future
- */
-function getDeadline(timeout_secs) {
-  var deadline = new Date();
-  deadline.setSeconds(deadline.getSeconds() + timeout_secs);
-  return deadline;
-}
-
-/**
- * Responds to every request with the same data as a response
- * @param {Stream} stream
- */
-function echoHandler(stream) {
-  stream.pipe(stream);
-}
-
-/**
- * Responds to every request with an error status
- * @param {Stream} stream
- */
-function errorHandler(stream) {
-  throw {
-    'code' : grpc.status.UNIMPLEMENTED,
-    'details' : 'error details'
-  };
-}
-
-/**
- * Wait for a cancellation instead of responding
- * @param {Stream} stream
- */
-function cancelHandler(stream) {
-  // do nothing
-}
-
-function metadataHandler(stream, metadata) {
-  stream.end();
-}
-
-/**
- * Serialize a string to a Buffer
- * @param {string} value The string to serialize
- * @return {Buffer} The serialized value
- */
-function stringSerialize(value) {
-  return new Buffer(value);
-}
-
-/**
- * Deserialize a Buffer to a string
- * @param {Buffer} buffer The buffer to deserialize
- * @return {string} The string value of the buffer
- */
-function stringDeserialize(buffer) {
-  return buffer.toString();
-}
-
-describe('echo client', function() {
-  var server;
-  var channel;
-  before(function() {
-    server = new Server(function getMetadata(method, metadata) {
-      return {method: [method]};
-    });
-    var port_num = server.bind('0.0.0.0:0');
-    server.register('echo', echoHandler);
-    server.register('error', errorHandler);
-    server.register('cancellation', cancelHandler);
-    server.register('metadata', metadataHandler);
-    server.start();
-
-    channel = new grpc.Channel('localhost:' + port_num);
-  });
-  after(function() {
-    server.shutdown();
-  });
-  it('should receive echo responses', function(done) {
-    var messages = ['echo1', 'echo2', 'echo3', 'echo4'];
-    var stream = client.makeRequest(
-        channel,
-        'echo',
-        stringSerialize,
-        stringDeserialize);
-    for (var i = 0; i < messages.length; i++) {
-      stream.write(messages[i]);
-    }
-    stream.end();
-    var index = 0;
-    stream.on('data', function(chunk) {
-      assert.equal(messages[index], chunk);
-      index += 1;
-    });
-    stream.on('status', function(status) {
-      assert.equal(status.code, client.status.OK);
-    });
-    stream.on('end', function() {
-      assert.equal(index, messages.length);
-      done();
-    });
-  });
-  it('should recieve metadata set by the server', function(done) {
-    var stream = client.makeRequest(channel, 'metadata');
-    stream.on('metadata', function(metadata) {
-      assert.strictEqual(metadata.method[0].toString(), 'metadata');
-    });
-    stream.on('status', function(status) {
-      assert.equal(status.code, client.status.OK);
-      done();
-    });
-    stream.end();
-  });
-  it('should get an error status that the server throws', function(done) {
-    var stream = client.makeRequest(channel, 'error');
-
-    stream.on('data', function() {});
-    stream.write(new Buffer('test'));
-    stream.end();
-    stream.on('status', function(status) {
-      assert.equal(status.code, grpc.status.UNIMPLEMENTED);
-      assert.equal(status.details, 'error details');
-      done();
-    });
-  });
-  it('should be able to cancel a call', function(done) {
-    var stream = client.makeRequest(
-        channel,
-        'cancellation',
-        null,
-        getDeadline(1));
-
-    stream.cancel();
-    stream.on('status', function(status) {
-      assert.equal(status.code, grpc.status.CANCELLED);
-      done();
-    });
-  });
-  it('should get correct status for unimplemented method', function(done) {
-    var stream = client.makeRequest(channel, 'unimplemented_method');
-    stream.end();
-    stream.on('status', function(status) {
-      assert.equal(status.code, grpc.status.UNIMPLEMENTED);
-      done();
-    });
-  });
-});
-/* TODO(mlumish): explore options for reducing duplication between this test
- * and the insecure echo client test */
-describe('secure echo client', function() {
-  var server;
-  var channel;
-  before(function(done) {
-    fs.readFile(ca_path, function(err, ca_data) {
-      assert.ifError(err);
-      fs.readFile(key_path, function(err, key_data) {
-        assert.ifError(err);
-        fs.readFile(pem_path, function(err, pem_data) {
-          assert.ifError(err);
-          var creds = grpc.Credentials.createSsl(ca_data);
-          var server_creds = grpc.ServerCredentials.createSsl(null,
-                                                              key_data,
-                                                              pem_data);
-
-          server = new Server(null, {'credentials' : server_creds});
-          var port_num = server.bind('0.0.0.0:0', true);
-          server.register('echo', echoHandler);
-          server.start();
-
-          channel = new grpc.Channel('localhost:' + port_num, {
-            'grpc.ssl_target_name_override' : 'foo.test.google.com',
-            'credentials' : creds
-          });
-          done();
-        });
-      });
-    });
-  });
-  after(function() {
-    server.shutdown();
-  });
-  it('should recieve echo responses', function(done) {
-    var messages = ['echo1', 'echo2', 'echo3', 'echo4'];
-    var stream = client.makeRequest(
-        channel,
-        'echo',
-        stringSerialize,
-        stringDeserialize);
-    for (var i = 0; i < messages.length; i++) {
-      stream.write(messages[i]);
-    }
-    stream.end();
-    var index = 0;
-    stream.on('data', function(chunk) {
-      assert.equal(messages[index], chunk);
-      index += 1;
-    });
-    stream.on('status', function(status) {
-      assert.equal(status.code, client.status.OK);
-    });
-    stream.on('end', function() {
-      assert.equal(index, messages.length);
-      done();
-    });
-  });
-});
diff --git a/src/node/test/constant_test.js b/src/node/test/constant_test.js
index 0138a55226..4d11e6f527 100644
--- a/src/node/test/constant_test.js
+++ b/src/node/test/constant_test.js
@@ -76,31 +76,6 @@ var callErrorNames = [
   'INVALID_FLAGS'
 ];
 
-/**
- * List of all op error names
- * @const
- * @type {Array.<string>}
- */
-var opErrorNames = [
-  'OK',
-  'ERROR'
-];
-
-/**
- * List of all completion type names
- * @const
- * @type {Array.<string>}
- */
-var completionTypeNames = [
-  'QUEUE_SHUTDOWN',
-  'READ',
-  'WRITE_ACCEPTED',
-  'FINISH_ACCEPTED',
-  'CLIENT_METADATA_READ',
-  'FINISHED',
-  'SERVER_RPC_NEW'
-];
-
 describe('constants', function() {
   it('should have all of the status constants', function() {
     for (var i = 0; i < statusNames.length; i++) {
@@ -114,16 +89,4 @@ describe('constants', function() {
              'call error missing: ' + callErrorNames[i]);
     }
   });
-  it('should have all of the op errors', function() {
-    for (var i = 0; i < opErrorNames.length; i++) {
-      assert(grpc.opError.hasOwnProperty(opErrorNames[i]),
-             'op error missing: ' + opErrorNames[i]);
-    }
-  });
-  it('should have all of the completion types', function() {
-    for (var i = 0; i < completionTypeNames.length; i++) {
-      assert(grpc.completionType.hasOwnProperty(completionTypeNames[i]),
-             'completion type missing: ' + completionTypeNames[i]);
-    }
-  });
 });
diff --git a/src/node/test/end_to_end_test.js b/src/node/test/end_to_end_test.js
index 1f53df23f3..f8899beae8 100644
--- a/src/node/test/end_to_end_test.js
+++ b/src/node/test/end_to_end_test.js
@@ -74,40 +74,49 @@ describe('end-to-end', function() {
     var status_text = 'xyz';
     var call = new grpc.Call(channel,
                              'dummy_method',
-                             deadline);
-    call.invoke(function(event) {
-      assert.strictEqual(event.type,
-                         grpc.completionType.CLIENT_METADATA_READ);
-    },function(event) {
-      assert.strictEqual(event.type, grpc.completionType.FINISHED);
-      var status = event.data;
-      assert.strictEqual(status.code, grpc.status.OK);
-      assert.strictEqual(status.details, status_text);
+                             Infinity);
+    var client_batch = {};
+    client_batch[grpc.opType.SEND_INITIAL_METADATA] = {};
+    client_batch[grpc.opType.SEND_CLOSE_FROM_CLIENT] = true;
+    client_batch[grpc.opType.RECV_INITIAL_METADATA] = true;
+    client_batch[grpc.opType.RECV_STATUS_ON_CLIENT] = true;
+    call.startBatch(client_batch, function(err, response) {
+      assert.ifError(err);
+      assert.deepEqual(response, {
+        'send metadata': true,
+        'client close': true,
+        'metadata': {},
+        'status': {
+          'code': grpc.status.OK,
+          'details': status_text,
+          'metadata': {}
+        }
+      });
       done();
-    }, 0);
+    });
 
-    server.requestCall(function(event) {
-      assert.strictEqual(event.type, grpc.completionType.SERVER_RPC_NEW);
-      var server_call = event.call;
+    server.requestCall(function(err, call_details) {
+      var new_call = call_details['new call'];
+      assert.notEqual(new_call, null);
+      var server_call = new_call.call;
       assert.notEqual(server_call, null);
-      server_call.serverAccept(function(event) {
-        assert.strictEqual(event.type, grpc.completionType.FINISHED);
-      }, 0);
-      server_call.serverEndInitialMetadata(0);
-      server_call.startWriteStatus(
-          grpc.status.OK,
-          status_text,
-          function(event) {
-            assert.strictEqual(event.type,
-                               grpc.completionType.FINISH_ACCEPTED);
-            assert.strictEqual(event.data, grpc.opError.OK);
-            done();
-          });
-    });
-    call.writesDone(function(event) {
-      assert.strictEqual(event.type,
-                         grpc.completionType.FINISH_ACCEPTED);
-      assert.strictEqual(event.data, grpc.opError.OK);
+      var server_batch = {};
+      server_batch[grpc.opType.SEND_INITIAL_METADATA] = {};
+      server_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
+        'metadata': {},
+        'code': grpc.status.OK,
+        'details': status_text
+      };
+      server_batch[grpc.opType.RECV_CLOSE_ON_SERVER] = true;
+      server_call.startBatch(server_batch, function(err, response) {
+        assert.ifError(err);
+        assert.deepEqual(response, {
+          'send metadata': true,
+          'send status': true,
+          'cancelled': false
+        });
+       done();
+      });
     });
   });
   it('should successfully send and receive metadata', function(complete) {
@@ -117,115 +126,110 @@ describe('end-to-end', function() {
     var status_text = 'xyz';
     var call = new grpc.Call(channel,
                              'dummy_method',
-                             deadline);
-    call.addMetadata({'client_key': ['client_value']});
-    call.invoke(function(event) {
-      assert.strictEqual(event.type,
-                         grpc.completionType.CLIENT_METADATA_READ);
-      assert.strictEqual(event.data.server_key[0].toString(), 'server_value');
-    },function(event) {
-      assert.strictEqual(event.type, grpc.completionType.FINISHED);
-      var status = event.data;
-      assert.strictEqual(status.code, grpc.status.OK);
-      assert.strictEqual(status.details, status_text);
+                             Infinity);
+    var client_batch = {};
+    client_batch[grpc.opType.SEND_INITIAL_METADATA] = {
+      'client_key': ['client_value']
+    };
+    client_batch[grpc.opType.SEND_CLOSE_FROM_CLIENT] = true;
+    client_batch[grpc.opType.RECV_INITIAL_METADATA] = true;
+    client_batch[grpc.opType.RECV_STATUS_ON_CLIENT] = true;
+    call.startBatch(client_batch, function(err, response) {
+      assert.ifError(err);
+      assert(response['send metadata']);
+      assert(response['client close']);
+      assert(response.hasOwnProperty('metadata'));
+      assert.strictEqual(response.metadata.server_key[0].toString(),
+                         'server_value');
+      assert.deepEqual(response.status, {'code': grpc.status.OK,
+                                         'details': status_text,
+                                         'metadata': {}});
       done();
-    }, 0);
+    });
 
-    server.requestCall(function(event) {
-      assert.strictEqual(event.type, grpc.completionType.SERVER_RPC_NEW);
-      assert.strictEqual(event.data.metadata.client_key[0].toString(),
+    server.requestCall(function(err, call_details) {
+      var new_call = call_details['new call'];
+      assert.notEqual(new_call, null);
+      assert.strictEqual(new_call.metadata.client_key[0].toString(),
                          'client_value');
-      var server_call = event.call;
+      var server_call = new_call.call;
       assert.notEqual(server_call, null);
-      server_call.serverAccept(function(event) {
-        assert.strictEqual(event.type, grpc.completionType.FINISHED);
-      }, 0);
-      server_call.addMetadata({'server_key': ['server_value']});
-      server_call.serverEndInitialMetadata(0);
-      server_call.startWriteStatus(
-          grpc.status.OK,
-          status_text,
-          function(event) {
-            assert.strictEqual(event.type,
-                               grpc.completionType.FINISH_ACCEPTED);
-            assert.strictEqual(event.data, grpc.opError.OK);
-            done();
-          });
-    });
-    call.writesDone(function(event) {
-      assert.strictEqual(event.type,
-                         grpc.completionType.FINISH_ACCEPTED);
-      assert.strictEqual(event.data, grpc.opError.OK);
+      var server_batch = {};
+      server_batch[grpc.opType.SEND_INITIAL_METADATA] = {
+        'server_key': ['server_value']
+      };
+      server_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
+        'metadata': {},
+        'code': grpc.status.OK,
+        'details': status_text
+      };
+      server_batch[grpc.opType.RECV_CLOSE_ON_SERVER] = true;
+      server_call.startBatch(server_batch, function(err, response) {
+        assert.ifError(err);
+        assert.deepEqual(response, {
+          'send metadata': true,
+          'send status': true,
+          'cancelled': false
+        });
+       done();
+      });
     });
   });
   it('should send and receive data without error', function(complete) {
     var req_text = 'client_request';
     var reply_text = 'server_response';
-    var done = multiDone(complete, 6);
+    var done = multiDone(complete, 2);
     var deadline = new Date();
     deadline.setSeconds(deadline.getSeconds() + 3);
     var status_text = 'success';
     var call = new grpc.Call(channel,
                              'dummy_method',
-                             deadline);
-    call.invoke(function(event) {
-      assert.strictEqual(event.type,
-                         grpc.completionType.CLIENT_METADATA_READ);
-      done();
-    },function(event) {
-      assert.strictEqual(event.type, grpc.completionType.FINISHED);
-      var status = event.data;
-      assert.strictEqual(status.code, grpc.status.OK);
-      assert.strictEqual(status.details, status_text);
-      done();
-    }, 0);
-    call.startWrite(
-        new Buffer(req_text),
-        function(event) {
-          assert.strictEqual(event.type,
-                             grpc.completionType.WRITE_ACCEPTED);
-          assert.strictEqual(event.data, grpc.opError.OK);
-          call.writesDone(function(event) {
-            assert.strictEqual(event.type,
-                               grpc.completionType.FINISH_ACCEPTED);
-            assert.strictEqual(event.data, grpc.opError.OK);
-            done();
-          });
-        }, 0);
-    call.startRead(function(event) {
-      assert.strictEqual(event.type, grpc.completionType.READ);
-      assert.strictEqual(event.data.toString(), reply_text);
+                             Infinity);
+    var client_batch = {};
+    client_batch[grpc.opType.SEND_INITIAL_METADATA] = {};
+    client_batch[grpc.opType.SEND_MESSAGE] = new Buffer(req_text);
+    client_batch[grpc.opType.SEND_CLOSE_FROM_CLIENT] = true;
+    client_batch[grpc.opType.RECV_INITIAL_METADATA] = true;
+    client_batch[grpc.opType.RECV_MESSAGE] = true;
+    client_batch[grpc.opType.RECV_STATUS_ON_CLIENT] = true;
+    call.startBatch(client_batch, function(err, response) {
+      assert.ifError(err);
+      assert(response['send metadata']);
+      assert(response['client close']);
+      assert.deepEqual(response.metadata, {});
+      assert(response['send message']);
+      assert.strictEqual(response.read.toString(), reply_text);
+      assert.deepEqual(response.status, {'code': grpc.status.OK,
+                                         'details': status_text,
+                                         'metadata': {}});
       done();
     });
-    server.requestCall(function(event) {
-      assert.strictEqual(event.type, grpc.completionType.SERVER_RPC_NEW);
-      var server_call = event.call;
+
+    server.requestCall(function(err, call_details) {
+      var new_call = call_details['new call'];
+      assert.notEqual(new_call, null);
+      var server_call = new_call.call;
       assert.notEqual(server_call, null);
-      server_call.serverAccept(function(event) {
-        assert.strictEqual(event.type, grpc.completionType.FINISHED);
-        done();
-      });
-      server_call.serverEndInitialMetadata(0);
-      server_call.startRead(function(event) {
-        assert.strictEqual(event.type, grpc.completionType.READ);
-        assert.strictEqual(event.data.toString(), req_text);
-        server_call.startWrite(
-            new Buffer(reply_text),
-            function(event) {
-              assert.strictEqual(event.type,
-                                 grpc.completionType.WRITE_ACCEPTED);
-              assert.strictEqual(event.data,
-                                 grpc.opError.OK);
-              server_call.startWriteStatus(
-                  grpc.status.OK,
-                  status_text,
-                  function(event) {
-                    assert.strictEqual(event.type,
-                                       grpc.completionType.FINISH_ACCEPTED);
-                    assert.strictEqual(event.data, grpc.opError.OK);
-                    done();
-                  });
-            }, 0);
+      var server_batch = {};
+      server_batch[grpc.opType.SEND_INITIAL_METADATA] = {};
+      server_batch[grpc.opType.RECV_MESSAGE] = true;
+      server_call.startBatch(server_batch, function(err, response) {
+        assert.ifError(err);
+        assert(response['send metadata']);
+        assert.strictEqual(response.read.toString(), req_text);
+        var response_batch = {};
+        response_batch[grpc.opType.SEND_MESSAGE] = new Buffer(reply_text);
+        response_batch[grpc.opType.SEND_STATUS_FROM_SERVER] = {
+          'metadata': {},
+          'code': grpc.status.OK,
+          'details': status_text
+        };
+        response_batch[grpc.opType.RECV_CLOSE_ON_SERVER] = true;
+        server_call.startBatch(response_batch, function(err, response) {
+          assert(response['send status']);
+          assert(!response['cancelled']);
+          done();
+        });
       });
     });
   });
diff --git a/src/node/test/interop_sanity_test.js b/src/node/test/interop_sanity_test.js
index 7ecaad833d..81cd9fa5b9 100644
--- a/src/node/test/interop_sanity_test.js
+++ b/src/node/test/interop_sanity_test.js
@@ -56,7 +56,7 @@ describe('Interop tests', function() {
     interop_client.runTest(port, name_override, 'empty_unary', true, done);
   });
   // This fails due to an unknown bug
-  it.skip('should pass large_unary', function(done) {
+  it('should pass large_unary', function(done) {
     interop_client.runTest(port, name_override, 'large_unary', true, done);
   });
   it('should pass client_streaming', function(done) {
diff --git a/src/node/test/math_client_test.js b/src/node/test/math_client_test.js
index 0e365bf870..61b4a2fa2f 100644
--- a/src/node/test/math_client_test.js
+++ b/src/node/test/math_client_test.js
@@ -63,9 +63,6 @@ describe('Math client', function() {
       assert.ifError(err);
       assert.equal(value.quotient, 1);
       assert.equal(value.remainder, 3);
-    });
-    call.on('status', function checkStatus(status) {
-      assert.strictEqual(status.code, grpc.status.OK);
       done();
     });
   });
diff --git a/src/node/test/server_test.js b/src/node/test/server_test.js
deleted file mode 100644
index a3e1edf50f..0000000000
--- a/src/node/test/server_test.js
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- *
- * Copyright 2014, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-var assert = require('assert');
-var grpc = require('bindings')('grpc.node');
-var Server = require('../src/server');
-
-/**
- * This is used for testing functions with multiple asynchronous calls that
- * can happen in different orders. This should be passed the number of async
- * function invocations that can occur last, and each of those should call this
- * function's return value
- * @param {function()} done The function that should be called when a test is
- *     complete.
- * @param {number} count The number of calls to the resulting function if the
- *     test passes.
- * @return {function()} The function that should be called at the end of each
- *     sequence of asynchronous functions.
- */
-function multiDone(done, count) {
-  return function() {
-    count -= 1;
-    if (count <= 0) {
-      done();
-    }
-  };
-}
-
-/**
- * Responds to every request with the same data as a response
- * @param {Stream} stream
- */
-function echoHandler(stream) {
-  stream.pipe(stream);
-}
-
-describe('echo server', function() {
-  var server;
-  var channel;
-  before(function() {
-    server = new Server();
-    var port_num = server.bind('[::]:0');
-    server.register('echo', echoHandler);
-    server.start();
-
-    channel = new grpc.Channel('localhost:' + port_num);
-  });
-  after(function() {
-    server.shutdown();
-  });
-  it('should echo inputs as responses', function(done) {
-    done = multiDone(done, 4);
-
-    var req_text = 'echo test string';
-    var status_text = 'OK';
-
-    var deadline = new Date();
-    deadline.setSeconds(deadline.getSeconds() + 3);
-    var call = new grpc.Call(channel,
-                             'echo',
-                             deadline);
-    call.invoke(function(event) {
-      assert.strictEqual(event.type,
-                         grpc.completionType.CLIENT_METADATA_READ);
-      done();
-    },function(event) {
-      assert.strictEqual(event.type, grpc.completionType.FINISHED);
-      var status = event.data;
-      assert.strictEqual(status.code, grpc.status.OK);
-      assert.strictEqual(status.details, status_text);
-      done();
-    }, 0);
-    call.startWrite(
-        new Buffer(req_text),
-        function(event) {
-          assert.strictEqual(event.type,
-                             grpc.completionType.WRITE_ACCEPTED);
-          assert.strictEqual(event.data, grpc.opError.OK);
-          call.writesDone(function(event) {
-            assert.strictEqual(event.type,
-                               grpc.completionType.FINISH_ACCEPTED);
-            assert.strictEqual(event.data, grpc.opError.OK);
-            done();
-          });
-        }, 0);
-    call.startRead(function(event) {
-      assert.strictEqual(event.type, grpc.completionType.READ);
-      assert.strictEqual(event.data.toString(), req_text);
-      done();
-    });
-  });
-});
diff --git a/src/node/test/surface_test.js b/src/node/test/surface_test.js
index 1038f9ab33..34e4ab4013 100644
--- a/src/node/test/surface_test.js
+++ b/src/node/test/surface_test.js
@@ -33,9 +33,9 @@
 
 var assert = require('assert');
 
-var surface_server = require('../src/surface_server.js');
+var surface_server = require('../src/server.js');
 
-var surface_client = require('../src/surface_client.js');
+var surface_client = require('../src/client.js');
 
 var ProtoBuf = require('protobufjs');