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diff --git a/test/cpp/end2end/test_service_impl.cc b/test/cpp/end2end/test_service_impl.cc
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+++ b/test/cpp/end2end/test_service_impl.cc
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+/*
+ *
+ * Copyright 2016, 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 "test/cpp/end2end/test_service_impl.h"
+
+#include <grpc++/security/credentials.h>
+#include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <gtest/gtest.h>
+
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/cpp/util/string_ref_helper.h"
+
+using std::chrono::system_clock;
+
+namespace grpc {
+namespace testing {
+namespace {
+
+// When echo_deadline is requested, deadline seen in the ServerContext is set in
+// the response in seconds.
+void MaybeEchoDeadline(ServerContext* context, const EchoRequest* request,
+                       EchoResponse* response) {
+  if (request->has_param() && request->param().echo_deadline()) {
+    gpr_timespec deadline = gpr_inf_future(GPR_CLOCK_REALTIME);
+    if (context->deadline() != system_clock::time_point::max()) {
+      Timepoint2Timespec(context->deadline(), &deadline);
+    }
+    response->mutable_param()->set_request_deadline(deadline.tv_sec);
+  }
+}
+
+void CheckServerAuthContext(const ServerContext* context,
+                            const grpc::string& expected_client_identity) {
+  std::shared_ptr<const AuthContext> auth_ctx = context->auth_context();
+  std::vector<grpc::string_ref> ssl =
+      auth_ctx->FindPropertyValues("transport_security_type");
+  EXPECT_EQ(1u, ssl.size());
+  EXPECT_EQ("ssl", ToString(ssl[0]));
+  if (expected_client_identity.length() == 0) {
+    EXPECT_TRUE(auth_ctx->GetPeerIdentityPropertyName().empty());
+    EXPECT_TRUE(auth_ctx->GetPeerIdentity().empty());
+    EXPECT_FALSE(auth_ctx->IsPeerAuthenticated());
+  } else {
+    auto identity = auth_ctx->GetPeerIdentity();
+    EXPECT_TRUE(auth_ctx->IsPeerAuthenticated());
+    EXPECT_EQ(1u, identity.size());
+    EXPECT_EQ(expected_client_identity, identity[0]);
+  }
+}
+}  // namespace
+
+Status TestServiceImpl::Echo(ServerContext* context, const EchoRequest* request,
+                             EchoResponse* response) {
+  response->set_message(request->message());
+  MaybeEchoDeadline(context, request, response);
+  if (host_) {
+    response->mutable_param()->set_host(*host_);
+  }
+  if (request->has_param() && request->param().client_cancel_after_us()) {
+    {
+      std::unique_lock<std::mutex> lock(mu_);
+      signal_client_ = true;
+    }
+    while (!context->IsCancelled()) {
+      gpr_sleep_until(gpr_time_add(
+          gpr_now(GPR_CLOCK_REALTIME),
+          gpr_time_from_micros(request->param().client_cancel_after_us(),
+                               GPR_TIMESPAN)));
+    }
+    return Status::CANCELLED;
+  } else if (request->has_param() &&
+             request->param().server_cancel_after_us()) {
+    gpr_sleep_until(gpr_time_add(
+        gpr_now(GPR_CLOCK_REALTIME),
+        gpr_time_from_micros(request->param().server_cancel_after_us(),
+                             GPR_TIMESPAN)));
+    return Status::CANCELLED;
+  } else {
+    EXPECT_FALSE(context->IsCancelled());
+  }
+
+  if (request->has_param() && request->param().echo_metadata()) {
+    const std::multimap<grpc::string_ref, grpc::string_ref>& client_metadata =
+        context->client_metadata();
+    for (std::multimap<grpc::string_ref, grpc::string_ref>::const_iterator
+             iter = client_metadata.begin();
+         iter != client_metadata.end(); ++iter) {
+      context->AddTrailingMetadata(ToString(iter->first),
+                                   ToString(iter->second));
+    }
+  }
+  if (request->has_param() &&
+      (request->param().expected_client_identity().length() > 0 ||
+       request->param().check_auth_context())) {
+    CheckServerAuthContext(context,
+                           request->param().expected_client_identity());
+  }
+  if (request->has_param() && request->param().response_message_length() > 0) {
+    response->set_message(
+        grpc::string(request->param().response_message_length(), '\0'));
+  }
+  if (request->has_param() && request->param().echo_peer()) {
+    response->mutable_param()->set_peer(context->peer());
+  }
+  return Status::OK;
+}
+
+// Unimplemented is left unimplemented to test the returned error.
+
+Status TestServiceImpl::RequestStream(ServerContext* context,
+                                      ServerReader<EchoRequest>* reader,
+                                      EchoResponse* response) {
+  EchoRequest request;
+  response->set_message("");
+  int cancel_after_reads = 0;
+  const std::multimap<grpc::string_ref, grpc::string_ref>&
+      client_initial_metadata = context->client_metadata();
+  if (client_initial_metadata.find(kServerCancelAfterReads) !=
+      client_initial_metadata.end()) {
+    std::istringstream iss(ToString(
+        client_initial_metadata.find(kServerCancelAfterReads)->second));
+    iss >> cancel_after_reads;
+    gpr_log(GPR_INFO, "cancel_after_reads %d", cancel_after_reads);
+  }
+  while (reader->Read(&request)) {
+    if (cancel_after_reads == 1) {
+      gpr_log(GPR_INFO, "return cancel status");
+      return Status::CANCELLED;
+    } else if (cancel_after_reads > 0) {
+      cancel_after_reads--;
+    }
+    response->mutable_message()->append(request.message());
+  }
+  return Status::OK;
+}
+
+// Return 3 messages.
+// TODO(yangg) make it generic by adding a parameter into EchoRequest
+Status TestServiceImpl::ResponseStream(ServerContext* context,
+                                       const EchoRequest* request,
+                                       ServerWriter<EchoResponse>* writer) {
+  EchoResponse response;
+  response.set_message(request->message() + "0");
+  writer->Write(response);
+  response.set_message(request->message() + "1");
+  writer->Write(response);
+  response.set_message(request->message() + "2");
+  writer->Write(response);
+
+  return Status::OK;
+}
+
+Status TestServiceImpl::BidiStream(
+    ServerContext* context,
+    ServerReaderWriter<EchoResponse, EchoRequest>* stream) {
+  EchoRequest request;
+  EchoResponse response;
+  while (stream->Read(&request)) {
+    gpr_log(GPR_INFO, "recv msg %s", request.message().c_str());
+    response.set_message(request.message());
+    stream->Write(response);
+  }
+  return Status::OK;
+}
+
+}  // namespace testing
+}  // namespace grpc