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//
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//
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// Copyright 2017 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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//
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#include <thread>
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#include <gtest/gtest.h>
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#include "absl/strings/str_format.h"
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#include <grpc/support/log.h>
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#include <grpcpp/create_channel.h>
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#include <grpcpp/security/credentials.h>
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#include <grpcpp/server.h>
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#include <grpcpp/server_builder.h>
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#include <grpcpp/support/config.h>
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#include "src/core/lib/gprpp/crash.h"
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#include "src/proto/grpc/testing/echo.grpc.pb.h"
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#include "test/core/test_util/port.h"
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#include "test/core/test_util/test_config.h"
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namespace grpc {
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namespace {
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TEST(ServerRequestCallTest, ShortDeadlineDoesNotCauseOkayFalse) {
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std::mutex mu;
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bool shutting_down = false;
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// grpc server config.
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std::ostringstream s;
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int p = grpc_pick_unused_port_or_die();
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s << "[::1]:" << p;
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const string address = s.str();
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testing::EchoTestService::AsyncService service;
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ServerBuilder builder;
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builder.AddListeningPort(address, InsecureServerCredentials());
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auto cq = builder.AddCompletionQueue();
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builder.RegisterService(&service);
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auto server = builder.BuildAndStart();
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// server thread.
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std::thread t([address, &service, &cq, &mu, &shutting_down] {
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for (int n = 0; true; n++) {
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ServerContext ctx;
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testing::EchoRequest req;
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ServerAsyncResponseWriter<testing::EchoResponse> responder(&ctx);
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// if shutting down, don't enqueue a new request.
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{
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std::lock_guard<std::mutex> lock(mu);
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if (!shutting_down) {
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service.RequestEcho(&ctx, &req, &responder, cq.get(), cq.get(),
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reinterpret_cast<void*>(1));
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}
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}
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bool ok;
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void* tag;
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if (!cq->Next(&tag, &ok)) {
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break;
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}
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EXPECT_EQ((void*)1, tag);
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// If not shutting down, ok must be true for new requests.
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{
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std::lock_guard<std::mutex> lock(mu);
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if (!shutting_down && !ok) {
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grpc_core::Crash(absl::StrFormat("!ok on request %d", n));
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}
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if (shutting_down && !ok) {
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// Failed connection due to shutdown, continue flushing the CQ.
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continue;
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}
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}
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// Send a simple response after a small delay that would ensure the client
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// deadline is exceeded.
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gpr_log(GPR_INFO, "Got request %d", n);
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testing::EchoResponse response;
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response.set_message("foobar");
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// A bit of sleep to make sure the deadline elapses.
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gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
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gpr_time_from_seconds(1, GPR_TIMESPAN)));
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{
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std::lock_guard<std::mutex> lock(mu);
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if (shutting_down) {
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gpr_log(GPR_INFO,
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"shut down while processing call, not calling Finish()");
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// Continue flushing the CQ.
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continue;
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}
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gpr_log(GPR_INFO, "Finishing request %d", n);
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responder.Finish(response, grpc::Status::OK,
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reinterpret_cast<void*>(2));
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if (!cq->Next(&tag, &ok)) {
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break;
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}
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EXPECT_EQ((void*)2, tag);
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}
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}
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});
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auto stub = testing::EchoTestService::NewStub(
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grpc::CreateChannel(address, InsecureChannelCredentials()));
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for (int i = 0; i < 100; i++) {
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gpr_log(GPR_INFO, "Sending %d.", i);
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testing::EchoRequest request;
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/////////
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// Comment out the following line to get ok=false due to invalid request.
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// Otherwise, ok=false due to deadline being exceeded.
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/////////
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request.set_message("foobar");
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// A simple request with a short deadline. The server will always exceed the
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// deadline, whether due to the sleep or because the server was unable to
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// even fetch the request from the CQ before the deadline elapsed.
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testing::EchoResponse response;
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grpc::ClientContext ctx;
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ctx.set_fail_fast(false);
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ctx.set_deadline(std::chrono::system_clock::now() +
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std::chrono::milliseconds(1));
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grpc::Status status = stub->Echo(&ctx, request, &response);
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EXPECT_EQ(StatusCode::DEADLINE_EXCEEDED, status.error_code());
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gpr_log(GPR_INFO, "Success.");
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}
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gpr_log(GPR_INFO, "Done sending RPCs.");
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// Shut down everything properly.
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gpr_log(GPR_INFO, "Shutting down.");
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{
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std::lock_guard<std::mutex> lock(mu);
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shutting_down = true;
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}
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server->Shutdown();
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cq->Shutdown();
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server->Wait();
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t.join();
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}
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void ServerFunction(ServerCompletionQueue* cq, std::atomic_bool* shutdown) {
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for (;;) {
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bool ok;
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void* tag;
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if (!cq->Next(&tag, &ok)) {
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break;
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}
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if (shutdown->load()) {
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break;
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}
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// For UnimplementedAsyncRequest, the server handles it internally and never
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// returns from Next except when shutdown.
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grpc_core::Crash("unreached");
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}
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}
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void ClientFunction(testing::UnimplementedEchoService::Stub* stub) {
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constexpr int kNumRpcPerThreads = 5000;
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for (int i = 0; i < kNumRpcPerThreads; i++) {
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testing::EchoRequest request;
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request.set_message("foobar");
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testing::EchoResponse response;
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grpc::ClientContext ctx;
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grpc::Status status = stub->Unimplemented(&ctx, request, &response);
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EXPECT_EQ(StatusCode::UNIMPLEMENTED, status.error_code());
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}
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}
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TEST(ServerRequestCallTest, MultithreadedUnimplementedService) {
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std::atomic_bool shutdown(false);
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// grpc server config.
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std::ostringstream s;
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int p = grpc_pick_unused_port_or_die();
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s << "[::1]:" << p;
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const string address = s.str();
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testing::EchoTestService::AsyncService service;
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ServerBuilder builder;
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builder.AddListeningPort(address, InsecureServerCredentials());
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auto cq = builder.AddCompletionQueue();
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builder.RegisterService(&service);
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auto server = builder.BuildAndStart();
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ServerContext ctx;
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testing::EchoRequest req;
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ServerAsyncResponseWriter<testing::EchoResponse> responder(&ctx);
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service.RequestEcho(&ctx, &req, &responder, cq.get(), cq.get(),
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reinterpret_cast<void*>(1));
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// server threads
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constexpr int kNumServerThreads = 2;
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std::vector<std::thread> server_threads;
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server_threads.reserve(kNumServerThreads);
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for (int i = 0; i < kNumServerThreads; i++) {
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server_threads.emplace_back(ServerFunction, cq.get(), &shutdown);
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}
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auto stub = testing::UnimplementedEchoService::NewStub(
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grpc::CreateChannel(address, InsecureChannelCredentials()));
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// client threads
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constexpr int kNumClientThreads = 2;
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std::vector<std::thread> client_threads;
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client_threads.reserve(kNumClientThreads);
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for (int i = 0; i < kNumClientThreads; i++) {
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client_threads.emplace_back(ClientFunction, stub.get());
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}
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for (auto& t : client_threads) {
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t.join();
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}
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// Shut down everything properly.
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gpr_log(GPR_INFO, "Shutting down.");
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shutdown.store(true);
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server->Shutdown();
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cq->Shutdown();
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server->Wait();
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for (auto& t : server_threads) {
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t.join();
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}
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}
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} // namespace
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} // namespace grpc
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int main(int argc, char** argv) {
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grpc::testing::TestEnvironment env(&argc, argv);
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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