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/*
*
* 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.
*
*/
#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 "grpc/support/log.h"
#include "channel.h"
namespace grpc {
namespace node {
using std::unique_ptr;
using std::shared_ptr;
typedef Nan::Persistent<v8::Value, Nan::CopyablePersistentTraits<v8::Value>> PersistentValue;
v8::Local<v8::Value> nanErrorWithCode(const char *msg, grpc_call_error code);
v8::Local<v8::Value> ParseMetadata(const grpc_metadata_array *metadata_array);
struct Resources {
std::vector<unique_ptr<Nan::Utf8String> > strings;
std::vector<unique_ptr<PersistentValue> > handles;
};
bool CreateMetadataArray(v8::Local<v8::Object> metadata,
grpc_metadata_array *array,
shared_ptr<Resources> resources);
/* Wrapper class for grpc_call structs. */
class Call : public Nan::ObjectWrap {
public:
static void Init(v8::Local<v8::Object> exports);
static bool HasInstance(v8::Local<v8::Value> val);
/* Wrap a grpc_call struct in a javascript object */
static v8::Local<v8::Value> WrapStruct(grpc_call *call);
void CompleteBatch(bool is_final_op);
private:
explicit Call(grpc_call *call);
~Call();
// Prevent copying
Call(const Call &);
Call &operator=(const Call &);
static NAN_METHOD(New);
static NAN_METHOD(StartBatch);
static NAN_METHOD(Cancel);
static NAN_METHOD(CancelWithStatus);
static NAN_METHOD(GetPeer);
static NAN_METHOD(SetCredentials);
static Nan::Callback *constructor;
// Used for typechecking instances of this javascript class
static Nan::Persistent<v8::FunctionTemplate> fun_tpl;
grpc_call *wrapped_call;
// The number of ops that were started but not completed on this call
int pending_batches;
/* Indicates whether the "final" op on a call has completed. For a client
call, this is GRPC_OP_RECV_STATUS_ON_CLIENT and for a server call, this
is GRPC_OP_SEND_STATUS_FROM_SERVER */
bool has_final_op_completed;
};
class Op {
public:
virtual v8::Local<v8::Value> GetNodeValue() const = 0;
virtual bool ParseOp(v8::Local<v8::Value> value, grpc_op *out,
shared_ptr<Resources> resources) = 0;
virtual ~Op();
v8::Local<v8::Value> GetOpType() const;
virtual bool IsFinalOp() = 0;
protected:
virtual std::string GetTypeString() const = 0;
};
typedef std::vector<unique_ptr<Op>> OpVec;
struct tag {
tag(Nan::Callback *callback, OpVec *ops,
shared_ptr<Resources> resources, Call *call);
~tag();
Nan::Callback *callback;
OpVec *ops;
shared_ptr<Resources> resources;
Call *call;
};
v8::Local<v8::Value> GetTagNodeValue(void *tag);
Nan::Callback *GetTagCallback(void *tag);
void DestroyTag(void *tag);
void CompleteTag(void *tag);
} // namespace node
} // namespace grpc
#endif // NET_GRPC_NODE_CALL_H_
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