Make number of stubs per channel configurable and expose metrics from

client

build.yaml

@@ -1891,6 +1891,20 @@ targets:
   - mac
   - linux
   - posix
+- name: metrics_client
+  build: test
+  run: false
+  language: c++
+  headers:
+  - test/cpp/util/metrics_server.h
+  src:
+  - test/proto/metrics.proto
+  - test/cpp/interop/metrics_client.cc
+  deps:
+  - grpc++
+  - grpc
+  - gpr
+  - grpc++_test_config
 - name: mock_test
   build: test
   language: c++
@@ -2114,13 +2128,16 @@ targets:
   - test/cpp/interop/client_helper.h
   - test/cpp/interop/interop_client.h
   - test/cpp/interop/stress_interop_client.h
+  - test/cpp/util/metrics_server.h
   src:
   - test/proto/empty.proto
   - test/proto/messages.proto
+  - test/proto/metrics.proto
   - test/proto/test.proto
   - test/cpp/interop/interop_client.cc
   - test/cpp/interop/stress_interop_client.cc
   - test/cpp/interop/stress_test.cc
+  - test/cpp/util/metrics_server.cc
   deps:
   - grpc++_test_util
   - grpc_test_util

test/cpp/interop/metrics_client.cc

@@ -0,0 +1,98 @@
+/*
+ *
+ * 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.
+ *is % allowed in string
+ */
+
+#include <memory>
+#include <string>
+
+#include <gflags/gflags.h>
+#include <grpc++/grpc++.h>
+
+#include "test/cpp/util/metrics_server.h"
+#include "test/cpp/util/test_config.h"
+#include "test/proto/metrics.grpc.pb.h"
+#include "test/proto/metrics.pb.h"
+
+DEFINE_string(metrics_server_address, "",
+              "The metrics server addresses in the fomrat <hostname>:<port>");
+
+using grpc::testing::EmptyMessage;
+using grpc::testing::GuageResponse;
+using grpc::testing::MetricsService;
+using grpc::testing::MetricsServiceImpl;
+
+void PrintMetrics(grpc::string& server_address) {
+  gpr_log(GPR_INFO, "creating a channel to %s", server_address.c_str());
+  std::shared_ptr<grpc::Channel> channel(
+      grpc::CreateChannel(server_address, grpc::InsecureCredentials()));
+
+  std::unique_ptr<MetricsService::Stub> stub(MetricsService::NewStub(channel));
+
+  grpc::ClientContext context;
+  EmptyMessage message;
+
+  std::unique_ptr<grpc::ClientReader<GuageResponse>> reader(
+      stub->GetAllGuages(&context, message));
+
+  GuageResponse guage_response;
+  long overall_rps = 0;
+  int idx = 0;
+  while (reader->Read(&guage_response)) {
+    gpr_log(GPR_INFO, "Guage: %d (%s: %ld)", ++idx,
+            guage_response.name().c_str(), guage_response.value());
+    overall_rps += guage_response.value();
+  }
+
+  gpr_log(GPR_INFO, "OVERALL: %ld", overall_rps);
+
+  const grpc::Status status = reader->Finish();
+  if (!status.ok()) {
+    gpr_log(GPR_ERROR, "Error in getting metrics from the client");
+  }
+}
+
+int main(int argc, char** argv) {
+  grpc::testing::InitTest(&argc, &argv, true);
+
+  // Make sure server_addresses flag is not empty
+  if (FLAGS_metrics_server_address.length() == 0) {
+    gpr_log(
+        GPR_ERROR,
+        "Cannot connect to the Metrics server. Please pass the address of the"
+        "metrics server to connect to via the 'metrics_server_address' flag");
+    return 1;
+  }
+
+  PrintMetrics(FLAGS_metrics_server_address);
+
+  return 0;
+}

test/cpp/interop/stress_interop_client.cc

@@ -40,6 +40,7 @@
 #include <grpc++/create_channel.h>
 
 #include "test/cpp/interop/interop_client.h"
+#include "test/cpp/util/metrics_server.h"
 
 namespace grpc {
 namespace testing {
@@ -81,21 +82,19 @@ TestCaseType WeightedRandomTestSelector::GetNextTest() const {
 
 StressTestInteropClient::StressTestInteropClient(
     int test_id, const grpc::string& server_address,
+    std::shared_ptr<Channel> channel,
     const WeightedRandomTestSelector& test_selector, long test_duration_secs,
-    long sleep_duration_ms)
+    long sleep_duration_ms, long metrics_collection_interval_secs)
     : test_id_(test_id),
       server_address_(server_address),
+      channel_(channel),
+      interop_client_(new InteropClient(channel, false)),
       test_selector_(test_selector),
       test_duration_secs_(test_duration_secs),
-      sleep_duration_ms_(sleep_duration_ms) {
-  // TODO(sreek): This will change once we add support for other tests
-  // that won't work with InsecureCredentials()
-  std::shared_ptr<Channel> channel(
-      CreateChannel(server_address, InsecureCredentials()));
-  interop_client_.reset(new InteropClient(channel, false));
-}
+      sleep_duration_ms_(sleep_duration_ms),
+      metrics_collection_interval_secs_(metrics_collection_interval_secs) {}
 
-void StressTestInteropClient::MainLoop() {
+void StressTestInteropClient::MainLoop(std::shared_ptr<Guage> rps_guage) {
   gpr_log(GPR_INFO, "Running test %d. ServerAddr: %s", test_id_,
           server_address_.c_str());
 
@@ -104,21 +103,38 @@ void StressTestInteropClient::MainLoop() {
                    gpr_time_from_seconds(test_duration_secs_, GPR_TIMESPAN));
 
   gpr_timespec current_time = gpr_now(GPR_CLOCK_REALTIME);
+  gpr_timespec next_stat_collection_time = current_time;
+  gpr_timespec collection_interval =
+      gpr_time_from_seconds(metrics_collection_interval_secs_, GPR_TIMESPAN);
+  long num_calls_per_interval = 0;
+
   while (test_duration_secs_ < 0 ||
-         gpr_time_cmp(current_time, test_end_time) < 0) {
+         gpr_time_cmp(gpr_now(GPR_CLOCK_REALTIME), test_end_time) < 0) {
     // Select the test case to execute based on the weights and execute it
     TestCaseType test_case = test_selector_.GetNextTest();
     gpr_log(GPR_INFO, "%d - Executing the test case %d", test_id_, test_case);
     RunTest(test_case);
 
+    num_calls_per_interval++;
+
+    // See if its time to collect stats yet
+    current_time = gpr_now(GPR_CLOCK_REALTIME);
+    if (gpr_time_cmp(next_stat_collection_time, current_time) < 0) {
+      rps_guage->Set(num_calls_per_interval /
+                     metrics_collection_interval_secs_);
+
+      num_calls_per_interval = 0;
+      next_stat_collection_time =
+          gpr_time_add(current_time, collection_interval);
+    }
+
     // Sleep between successive calls if needed
     if (sleep_duration_ms_ > 0) {
-      gpr_timespec sleep_time = gpr_time_add(
-          current_time, gpr_time_from_millis(sleep_duration_ms_, GPR_TIMESPAN));
+      gpr_timespec sleep_time =
+          gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                       gpr_time_from_millis(sleep_duration_ms_, GPR_TIMESPAN));
       gpr_sleep_until(sleep_time);
     }
-
-    current_time = gpr_now(GPR_CLOCK_REALTIME);
   }
 }
 

test/cpp/interop/stress_interop_client.h

@@ -41,6 +41,7 @@
 #include <grpc++/create_channel.h>
 
 #include "test/cpp/interop/interop_client.h"
+#include "test/cpp/util/metrics_server.h"
 
 namespace grpc {
 namespace testing {
@@ -84,20 +85,26 @@ class WeightedRandomTestSelector {
 class StressTestInteropClient {
  public:
   StressTestInteropClient(int test_id, const grpc::string& server_address,
+                          std::shared_ptr<Channel> channel,
                           const WeightedRandomTestSelector& test_selector,
-                          long test_duration_secs, long sleep_duration_ms);
+                          long test_duration_secs, long sleep_duration_ms,
+                          long metrics_collection_interval_secs);
 
-  void MainLoop();  // The main function. Use this as the thread entry point.
+  // The main funciton. Use this as the thread entry point.
+  // rps_guage is the Guage to record the request per second metric
+  void MainLoop(std::shared_ptr<Guage> rps_guage);
 
  private:
   void RunTest(TestCaseType test_case);
 
   int test_id_;
-  std::unique_ptr<InteropClient> interop_client_;
   const grpc::string& server_address_;
+  std::shared_ptr<Channel> channel_;
+  std::unique_ptr<InteropClient> interop_client_;
   const WeightedRandomTestSelector& test_selector_;
   long test_duration_secs_;
   long sleep_duration_ms_;
+  long metrics_collection_interval_secs_;
 };
 
 }  // namespace testing

test/cpp/interop/stress_test.cc

@@ -44,7 +44,15 @@
 
 #include "test/cpp/interop/interop_client.h"
 #include "test/cpp/interop/stress_interop_client.h"
+#include "test/cpp/util/metrics_server.h"
 #include "test/cpp/util/test_config.h"
+#include "test/proto/metrics.grpc.pb.h"
+#include "test/proto/metrics.pb.h"
+
+DEFINE_int32(metrics_port, 8081, "The metrics server port.");
+
+DEFINE_int32(metrics_collection_interval_secs, 5,
+             "How often (in seconds) should metrics be recorded.");
 
 DEFINE_int32(sleep_duration_ms, 0,
              "The duration (in millisec) between two"
@@ -61,6 +69,11 @@ DEFINE_string(server_addresses, "localhost:8080",
               " \"<name_1>:<port_1>,<name_2>:<port_1>...<name_N>:<port_N>\"\n"
               " Note: <name> can be servername or IP address.");
 
+DEFINE_int32(num_stubs_per_channel, 1,
+             "Number of stubs per each channels to server. This number also "
+             "indicates the max number of parallel RPC calls on each channel "
+             "at any given time.");
+
 // TODO(sreek): Add more test cases here in future
 DEFINE_string(test_cases, "",
               "List of test cases to call along with the"
@@ -84,10 +97,12 @@ using std::thread;
 using std::vector;
 
 using grpc::testing::kTestCaseList;
+using grpc::testing::MetricsService;
+using grpc::testing::MetricsServiceImpl;
 using grpc::testing::StressTestInteropClient;
 using grpc::testing::TestCaseType;
-using grpc::testing::WeightedRandomTestSelector;
 using grpc::testing::UNKNOWN_TEST;
+using grpc::testing::WeightedRandomTestSelector;
 
 TestCaseType GetTestTypeFromName(const grpc::string& test_name) {
   TestCaseType test_case = UNKNOWN_TEST;
@@ -199,23 +214,47 @@ int main(int argc, char** argv) {
   LogParameterInfo(server_addresses, tests);
 
   WeightedRandomTestSelector test_selector(tests);
+  MetricsServiceImpl metrics_service;
 
   gpr_log(GPR_INFO, "Starting test(s)..");
 
   vector<thread> test_threads;
+
   int thread_idx = 0;
   for (auto it = server_addresses.begin(); it != server_addresses.end(); it++) {
-    StressTestInteropClient* client = new StressTestInteropClient(
-        ++thread_idx, *it, test_selector, FLAGS_test_duration_secs,
-        FLAGS_sleep_duration_ms);
-
-    test_threads.emplace_back(
-        thread(&StressTestInteropClient::MainLoop, client));
+    // TODO(sreek): This will change once we add support for other tests
+    // that won't work with InsecureCredentials()
+    std::shared_ptr<grpc::Channel> channel(
+        CreateChannel(*it, grpc::InsecureCredentials()));
+
+    // Make multiple stubs (as defined by num_stubs_per_channel flag) to use the
+    // same channel. This is to test calling multiple RPC calls in parallel on
+    // each channel.
+    for (int i = 0; i < FLAGS_num_stubs_per_channel; i++) {
+      StressTestInteropClient* client = new StressTestInteropClient(
+          ++thread_idx, *it, channel, test_selector, FLAGS_test_duration_secs,
+          FLAGS_sleep_duration_ms, FLAGS_metrics_collection_interval_secs);
+
+      bool is_already_created;
+      grpc::string metricName = "/stress_test/rps/thread/" + std::to_string(i);
+      test_threads.emplace_back(
+          thread(&StressTestInteropClient::MainLoop, client,
+                 metrics_service.CreateGuage(metricName, is_already_created)));
+
+      // The Guage should not have been already created
+      GPR_ASSERT(!is_already_created);
+    }
   }
 
+  // Start metrics server before waiting for the stress test threads
+  std::unique_ptr<grpc::Server> metrics_server =
+      metrics_service.StartServer(FLAGS_metrics_port);
+
+  // Wait for the stress test threads to complete
   for (auto it = test_threads.begin(); it != test_threads.end(); it++) {
     it->join();
   }
 
+  metrics_server->Wait();
   return 0;
 }

test/cpp/util/metrics_server.cc

@@ -0,0 +1,118 @@
+/*
+ *
+ * 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.
+ *is % allowed in string
+ */
+
+#include "test/cpp/util/metrics_server.h"
+
+#include <vector>
+
+#include <grpc++/server_builder.h>
+
+#include "test/proto/metrics.grpc.pb.h"
+#include "test/proto/metrics.pb.h"
+
+namespace grpc {
+namespace testing {
+
+using std::vector;
+
+Guage::Guage(long initial_val) : val_(initial_val) {}
+
+void Guage::Set(long new_val) {
+  val_.store(new_val, std::memory_order_relaxed);
+}
+
+long Guage::Get() { return val_.load(std::memory_order_relaxed); }
+
+grpc::Status MetricsServiceImpl::GetAllGuages(
+    ServerContext* context, const EmptyMessage* request,
+    ServerWriter<GuageResponse>* writer) {
+  gpr_log(GPR_INFO, "GetAllGuages called");
+
+  std::lock_guard<std::mutex> lock(mu_);
+  for (auto it = guages_.begin(); it != guages_.end(); it++) {
+    GuageResponse resp;
+    resp.set_name(it->first);           // Guage name
+    resp.set_value(it->second->Get());  // Guage value
+    writer->Write(resp);
+  }
+
+  return Status::OK;
+}
+
+grpc::Status MetricsServiceImpl::GetGuage(ServerContext* context,
+                                          const GuageRequest* request,
+                                          GuageResponse* response) {
+  std::lock_guard<std::mutex> lock(mu_);
+
+  auto it = guages_.find(request->name());
+  if (it != guages_.end()) {
+    response->set_name(it->first);
+    response->set_value(it->second->Get());
+  }
+
+  return Status::OK;
+}
+
+std::shared_ptr<Guage> MetricsServiceImpl::CreateGuage(string name,
+                                                       bool& already_present) {
+  std::lock_guard<std::mutex> lock(mu_);
+
+  std::shared_ptr<Guage> guage(new Guage(0));
+  auto p = guages_.emplace(name, guage);
+
+  // p.first is an iterator pointing to <name, shared_ptr<Guage>> pair. p.second
+  // is a boolean indicating if the Guage is already present in the map
+  already_present = !p.second;
+  return p.first->second;
+}
+
+// Starts the metrics server and returns the grpc::Server instance. Call
+// wait() on the returned server instance.
+std::unique_ptr<grpc::Server> MetricsServiceImpl::StartServer(int port) {
+  gpr_log(GPR_INFO, "Building metrics server..");
+
+  grpc::string address = "0.0.0.0:" + std::to_string(port);
+
+  ServerBuilder builder;
+  builder.AddListeningPort(address, grpc::InsecureServerCredentials());
+  builder.RegisterService(this);
+
+  std::unique_ptr<grpc::Server> server(builder.BuildAndStart());
+  gpr_log(GPR_INFO, "Metrics server %s started. Ready to receive requests..",
+          address.c_str());
+
+  return server;
+}
+
+}  // namespace testing
+}  // namespace grpc

test/cpp/util/metrics_server.h

@@ -0,0 +1,101 @@
+/*
+ *
+ * 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.
+ *is % allowed in string
+ */
+#ifndef GRPC_TEST_CPP_METRICS_SERVER_H
+#define GRPC_TEST_CPP_METRICS_SERVER_H
+
+#include <atomic>
+#include <map>
+#include <mutex>
+#include <vector>
+
+#include "test/proto/metrics.grpc.pb.h"
+#include "test/proto/metrics.pb.h"
+
+/*
+ * This implements a Metrics server defined in test/proto/metrics.proto. Any
+ * test service can use this to export Metrics (TODO (sreek): Only Guages for
+ * now).
+ *
+ * Example:
+ *    MetricsServiceImpl metricsImpl;
+ *    ..
+ *    // Create Guage(s). Note: Guages can be created even after calling
+ *    // 'StartServer'.
+ *    Guage guage1 = metricsImpl.CreateGuage("foo",is_present);
+ *    // guage1 can now be used anywhere in the program to set values.
+ *    ...
+ *    // Create the metrics server
+ *    std::unique_ptr<grpc::Server> server = metricsImpl.StartServer(port);
+ *    server->Wait(); // Note: This is blocking.
+ */
+namespace grpc {
+namespace testing {
+
+using std::map;
+using std::vector;
+
+class Guage {
+ public:
+  Guage(long initial_val);
+  void Set(long new_val);
+  long Get();
+
+ private:
+  std::atomic_long val_;
+};
+
+class MetricsServiceImpl GRPC_FINAL : public MetricsService::Service {
+ public:
+  grpc::Status GetAllGuages(ServerContext* context, const EmptyMessage* request,
+                            ServerWriter<GuageResponse>* writer) GRPC_OVERRIDE;
+
+  grpc::Status GetGuage(ServerContext* context, const GuageRequest* request,
+                        GuageResponse* response) GRPC_OVERRIDE;
+
+  // Create a Guage with name 'name'. is_present is set to true if the Guage
+  // is already present in the map.
+  // NOTE: CreateGuage can be called anytime (i.e before or after calling
+  // StartServer).
+  std::shared_ptr<Guage> CreateGuage(string name, bool& is_present);
+
+  std::unique_ptr<grpc::Server> StartServer(int port);
+
+ private:
+  std::map<string, std::shared_ptr<Guage>> guages_;
+  std::mutex mu_;
+};
+
+}  // namespace testing
+}  // namespace grpc
+
+#endif  // GRPC_TEST_CPP_METRICS_SERVER_H

test/proto/metrics.proto

@@ -0,0 +1,51 @@
+
+// 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.
+
+// An integration test service that covers all the method signature permutations
+// of unary/streaming requests/responses.
+syntax = "proto3";
+
+package grpc.testing;
+
+message GuageResponse {
+  string name = 1;
+  int64 value = 2;
+}
+
+message GuageRequest {
+  string name = 1;
+}
+
+message EmptyMessage {}
+
+service MetricsService {
+  rpc GetAllGuages(EmptyMessage) returns (stream GuageResponse);
+  rpc GetGuage(GuageRequest) returns (GuageResponse);
+}

tools/run_tests/sources_and_headers.json

@@ -1412,6 +1412,25 @@
       "test/cpp/interop/interop_test.cc"
     ]
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "grpc", 
+      "grpc++", 
+      "grpc++_test_config"
+    ], 
+    "headers": [
+      "test/cpp/util/metrics_server.h", 
+      "test/proto/metrics.grpc.pb.h", 
+      "test/proto/metrics.pb.h"
+    ], 
+    "language": "c++", 
+    "name": "metrics_client", 
+    "src": [
+      "test/cpp/interop/metrics_client.cc", 
+      "test/cpp/util/metrics_server.h"
+    ]
+  }, 
   {
     "deps": [
       "gpr", 
@@ -1680,10 +1699,13 @@
       "test/cpp/interop/client_helper.h", 
       "test/cpp/interop/interop_client.h", 
       "test/cpp/interop/stress_interop_client.h", 
+      "test/cpp/util/metrics_server.h", 
       "test/proto/empty.grpc.pb.h", 
       "test/proto/empty.pb.h", 
       "test/proto/messages.grpc.pb.h", 
       "test/proto/messages.pb.h", 
+      "test/proto/metrics.grpc.pb.h", 
+      "test/proto/metrics.pb.h", 
       "test/proto/test.grpc.pb.h", 
       "test/proto/test.pb.h"
     ], 
@@ -1695,7 +1717,9 @@
       "test/cpp/interop/interop_client.h", 
       "test/cpp/interop/stress_interop_client.cc", 
       "test/cpp/interop/stress_interop_client.h", 
-      "test/cpp/interop/stress_test.cc"
+      "test/cpp/interop/stress_test.cc", 
+      "test/cpp/util/metrics_server.cc", 
+      "test/cpp/util/metrics_server.h"
     ]
   }, 
   {

vsprojects/vcxproj/test/metrics_client/metrics_client.vcxproj

@@ -0,0 +1,197 @@
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+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{FE8631BA-DF40-EC70-6078-C2DAF316E329}</ProjectGuid>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\..\..\..\vsprojects\cpptest.props" />
+    <Import Project="..\..\..\..\vsprojects\global.props" />
+    <Import Project="..\..\..\..\vsprojects\openssl.props" />
+    <Import Project="..\..\..\..\vsprojects\protobuf.props" />
+    <Import Project="..\..\..\..\vsprojects\winsock.props" />
+    <Import Project="..\..\..\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>metrics_client</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>metrics_client</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
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+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;_USE_32BIT_TIME_T;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+    </ClCompile>
+    <Link>
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+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
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+      <SDLCheck>true</SDLCheck>
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+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
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+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
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+      <OptimizeReferences>true</OptimizeReferences>
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+    </ClCompile>
+    <ClInclude Include="..\..\..\..\test\proto\metrics.pb.h">
+    </ClInclude>
+    <ClCompile Include="..\..\..\..\test\proto\metrics.grpc.pb.cc">
+    </ClCompile>
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+    </ClInclude>
+    <ClCompile Include="..\..\..\..\test\cpp\interop\metrics_client.cc">
+    </ClCompile>
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+  <ItemGroup>
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+      <Project>{C187A093-A0FE-489D-A40A-6E33DE0F9FEB}</Project>
+    </ProjectReference>
+    <ProjectReference Include="..\..\..\..\vsprojects\vcxproj\.\grpc\grpc.vcxproj">
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+    <ProjectReference Include="..\..\..\..\vsprojects\vcxproj\.\grpc++_test_config\grpc++_test_config.vcxproj">
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+  <ItemGroup>
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+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  <Import Project="..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.9\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.9\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.9\build\native\grpc.dependencies.zlib.targets" Condition="Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.9\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
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+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
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+    <Error Condition="!Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.9\build\native\grpc.dependencies.zlib.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.9\build\native\grpc.dependencies.zlib.targets')" />
+    <Error Condition="!Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.2.3\build\native\grpc.dependencies.openssl.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.2.3\build\native\grpc.dependencies.openssl.redist.targets')" />
+    <Error Condition="!Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.2.3\build\native\grpc.dependencies.openssl.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.2.3\build\native\grpc.dependencies.openssl.props')" />
+    <Error Condition="!Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.2.3\build\native\grpc.dependencies.openssl.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.2.3\build\native\grpc.dependencies.openssl.targets')" />
+  </Target>
+</Project>
+

vsprojects/vcxproj/test/metrics_client/metrics_client.vcxproj.filters

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClCompile Include="..\..\..\..\test\proto\metrics.proto">
+      <Filter>test\proto</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\test\cpp\interop\metrics_client.cc">
+      <Filter>test\cpp\interop</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\..\..\test\cpp\util\metrics_server.h">
+      <Filter>test\cpp\util</Filter>
+    </ClInclude>
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+
+  <ItemGroup>
+    <Filter Include="test">
+      <UniqueIdentifier>{2c00b6b1-865c-55b2-0d9d-8d7b42ad7d03}</UniqueIdentifier>
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+      <UniqueIdentifier>{a62a5921-b3d4-6069-e9cc-73f34609c99b}</UniqueIdentifier>
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+      <UniqueIdentifier>{fbd5c6ac-f3a9-1b16-6310-c205aadc9075}</UniqueIdentifier>
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+      <UniqueIdentifier>{16f4e45d-a509-3e4d-4a19-9383576bec54}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\proto">
+      <UniqueIdentifier>{c638ed75-9aa0-ccc3-a8d2-a1a6203977b1}</UniqueIdentifier>
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+

vsprojects/vcxproj/test/stress_test/stress_test.vcxproj

@@ -148,6 +148,7 @@
     <ClInclude Include="..\..\..\..\test\cpp\interop\client_helper.h" />
     <ClInclude Include="..\..\..\..\test\cpp\interop\interop_client.h" />
     <ClInclude Include="..\..\..\..\test\cpp\interop\stress_interop_client.h" />
+    <ClInclude Include="..\..\..\..\test\cpp\util\metrics_server.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\..\..\test\proto\empty.pb.cc">
@@ -166,6 +167,14 @@
     </ClCompile>
     <ClInclude Include="..\..\..\..\test\proto\messages.grpc.pb.h">
     </ClInclude>
+    <ClCompile Include="..\..\..\..\test\proto\metrics.pb.cc">
+    </ClCompile>
+    <ClInclude Include="..\..\..\..\test\proto\metrics.pb.h">
+    </ClInclude>
+    <ClCompile Include="..\..\..\..\test\proto\metrics.grpc.pb.cc">
+    </ClCompile>
+    <ClInclude Include="..\..\..\..\test\proto\metrics.grpc.pb.h">
+    </ClInclude>
     <ClCompile Include="..\..\..\..\test\proto\test.pb.cc">
     </ClCompile>
     <ClInclude Include="..\..\..\..\test\proto\test.pb.h">
@@ -180,6 +189,8 @@
     </ClCompile>
     <ClCompile Include="..\..\..\..\test\cpp\interop\stress_test.cc">
     </ClCompile>
+    <ClCompile Include="..\..\..\..\test\cpp\util\metrics_server.cc">
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\..\..\vsprojects\vcxproj\.\grpc++_test_util\grpc++_test_util.vcxproj">

vsprojects/vcxproj/test/stress_test/stress_test.vcxproj.filters

@@ -7,6 +7,9 @@
     <ClCompile Include="..\..\..\..\test\proto\messages.proto">
       <Filter>test\proto</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\test\proto\metrics.proto">
+      <Filter>test\proto</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\test\proto\test.proto">
       <Filter>test\proto</Filter>
     </ClCompile>
@@ -19,6 +22,9 @@
     <ClCompile Include="..\..\..\..\test\cpp\interop\stress_test.cc">
       <Filter>test\cpp\interop</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\test\cpp\util\metrics_server.cc">
+      <Filter>test\cpp\util</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\..\test\cpp\interop\client_helper.h">
@@ -30,6 +36,9 @@
     <ClInclude Include="..\..\..\..\test\cpp\interop\stress_interop_client.h">
       <Filter>test\cpp\interop</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\test\cpp\util\metrics_server.h">
+      <Filter>test\cpp\util</Filter>
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   </ItemGroup>
 
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@@ -42,6 +51,9 @@
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+    <Filter Include="test\cpp\util">
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     <Filter Include="test\proto">
       <UniqueIdentifier>{7172a335-47bf-8284-380d-a28a05c07311}</UniqueIdentifier>
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