| /* |
| * |
| * Copyright 2016 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include "test/cpp/end2end/test_service_impl.h" |
| |
| #include <string> |
| #include <thread> |
| |
| #include <grpc/support/log.h> |
| #include <grpcpp/security/credentials.h> |
| #include <grpcpp/server_context.h> |
| |
| #include "src/proto/grpc/testing/echo.grpc.pb.h" |
| #include "test/cpp/util/string_ref_helper.h" |
| |
| #include <gtest/gtest.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_transport_security_type, |
| const grpc::string& expected_client_identity) { |
| std::shared_ptr<const AuthContext> auth_ctx = context->auth_context(); |
| std::vector<grpc::string_ref> tst = |
| auth_ctx->FindPropertyValues("transport_security_type"); |
| EXPECT_EQ(1u, tst.size()); |
| EXPECT_EQ(expected_transport_security_type, ToString(tst[0])); |
| if (expected_client_identity.empty()) { |
| 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]); |
| } |
| } |
| |
| // Returns the number of pairs in metadata that exactly match the given |
| // key-value pair. Returns -1 if the pair wasn't found. |
| int MetadataMatchCount( |
| const std::multimap<grpc::string_ref, grpc::string_ref>& metadata, |
| const grpc::string& key, const grpc::string& value) { |
| int count = 0; |
| for (std::multimap<grpc::string_ref, grpc::string_ref>::const_iterator iter = |
| metadata.begin(); |
| iter != metadata.end(); ++iter) { |
| if (ToString(iter->first) == key && ToString(iter->second) == value) { |
| count++; |
| } |
| } |
| return count; |
| } |
| } // namespace |
| |
| namespace { |
| int GetIntValueFromMetadataHelper( |
| const char* key, |
| const std::multimap<grpc::string_ref, grpc::string_ref>& metadata, |
| int default_value) { |
| if (metadata.find(key) != metadata.end()) { |
| std::istringstream iss(ToString(metadata.find(key)->second)); |
| iss >> default_value; |
| gpr_log(GPR_INFO, "%s : %d", key, default_value); |
| } |
| |
| return default_value; |
| } |
| |
| int GetIntValueFromMetadata( |
| const char* key, |
| const std::multimap<grpc::string_ref, grpc::string_ref>& metadata, |
| int default_value) { |
| return GetIntValueFromMetadataHelper(key, metadata, default_value); |
| } |
| |
| void ServerTryCancel(ServerContext* context) { |
| EXPECT_FALSE(context->IsCancelled()); |
| context->TryCancel(); |
| gpr_log(GPR_INFO, "Server called TryCancel() to cancel the request"); |
| // Now wait until it's really canceled |
| while (!context->IsCancelled()) { |
| gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
| gpr_time_from_micros(1000, GPR_TIMESPAN))); |
| } |
| } |
| |
| void ServerTryCancelNonblocking(ServerContext* context) { |
| EXPECT_FALSE(context->IsCancelled()); |
| context->TryCancel(); |
| gpr_log(GPR_INFO, "Server called TryCancel() to cancel the request"); |
| } |
| |
| void LoopUntilCancelled(Alarm* alarm, ServerContext* context, |
| experimental::ServerCallbackRpcController* controller, |
| int loop_delay_us) { |
| if (!context->IsCancelled()) { |
| alarm->experimental().Set( |
| gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), |
| gpr_time_from_micros(loop_delay_us, GPR_TIMESPAN)), |
| [alarm, context, controller, loop_delay_us](bool) { |
| LoopUntilCancelled(alarm, context, controller, loop_delay_us); |
| }); |
| } else { |
| controller->Finish(Status::CANCELLED); |
| } |
| } |
| } // namespace |
| |
| Status TestServiceImpl::Echo(ServerContext* context, const EchoRequest* request, |
| EchoResponse* response) { |
| // A bit of sleep to make sure that short deadline tests fail |
| if (request->has_param() && request->param().server_sleep_us() > 0) { |
| gpr_sleep_until( |
| gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC), |
| gpr_time_from_micros(request->param().server_sleep_us(), |
| GPR_TIMESPAN))); |
| } |
| |
| if (request->has_param() && request->param().server_die()) { |
| gpr_log(GPR_ERROR, "The request should not reach application handler."); |
| GPR_ASSERT(0); |
| } |
| if (request->has_param() && request->param().has_expected_error()) { |
| const auto& error = request->param().expected_error(); |
| return Status(static_cast<StatusCode>(error.code()), error.error_message(), |
| error.binary_error_details()); |
| } |
| int server_try_cancel = GetIntValueFromMetadata( |
| kServerTryCancelRequest, context->client_metadata(), DO_NOT_CANCEL); |
| if (server_try_cancel > DO_NOT_CANCEL) { |
| // Since this is a unary RPC, by the time this server handler is called, |
| // the 'request' message is already read from the client. So the scenarios |
| // in server_try_cancel don't make much sense. Just cancel the RPC as long |
| // as server_try_cancel is not DO_NOT_CANCEL |
| ServerTryCancel(context); |
| return Status::CANCELLED; |
| } |
| |
| 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 if (!request->has_param() || |
| !request->param().skip_cancelled_check()) { |
| 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)); |
| } |
| // Terminate rpc with error and debug info in trailer. |
| if (request->param().debug_info().stack_entries_size() || |
| !request->param().debug_info().detail().empty()) { |
| grpc::string serialized_debug_info = |
| request->param().debug_info().SerializeAsString(); |
| context->AddTrailingMetadata(kDebugInfoTrailerKey, serialized_debug_info); |
| return Status::CANCELLED; |
| } |
| } |
| if (request->has_param() && |
| (request->param().expected_client_identity().length() > 0 || |
| request->param().check_auth_context())) { |
| CheckServerAuthContext(context, |
| request->param().expected_transport_security_type(), |
| 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; |
| } |
| |
| Status TestServiceImpl::CheckClientInitialMetadata(ServerContext* context, |
| const SimpleRequest* request, |
| SimpleResponse* response) { |
| EXPECT_EQ(MetadataMatchCount(context->client_metadata(), |
| kCheckClientInitialMetadataKey, |
| kCheckClientInitialMetadataVal), |
| 1); |
| EXPECT_EQ(1u, |
| context->client_metadata().count(kCheckClientInitialMetadataKey)); |
| return Status::OK; |
| } |
| |
| void CallbackTestServiceImpl::Echo( |
| ServerContext* context, const EchoRequest* request, EchoResponse* response, |
| experimental::ServerCallbackRpcController* controller) { |
| CancelState* cancel_state = new CancelState; |
| int server_use_cancel_callback = |
| GetIntValueFromMetadata(kServerUseCancelCallback, |
| context->client_metadata(), DO_NOT_USE_CALLBACK); |
| if (server_use_cancel_callback != DO_NOT_USE_CALLBACK) { |
| controller->SetCancelCallback([cancel_state] { |
| EXPECT_FALSE(cancel_state->callback_invoked.exchange( |
| true, std::memory_order_relaxed)); |
| }); |
| if (server_use_cancel_callback == MAYBE_USE_CALLBACK_EARLY_CANCEL) { |
| EXPECT_TRUE(context->IsCancelled()); |
| EXPECT_TRUE( |
| cancel_state->callback_invoked.load(std::memory_order_relaxed)); |
| } else { |
| EXPECT_FALSE(context->IsCancelled()); |
| EXPECT_FALSE( |
| cancel_state->callback_invoked.load(std::memory_order_relaxed)); |
| } |
| } |
| // A bit of sleep to make sure that short deadline tests fail |
| if (request->has_param() && request->param().server_sleep_us() > 0) { |
| // Set an alarm for that much time |
| alarm_.experimental().Set( |
| gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC), |
| gpr_time_from_micros(request->param().server_sleep_us(), |
| GPR_TIMESPAN)), |
| [this, context, request, response, controller, cancel_state](bool) { |
| EchoNonDelayed(context, request, response, controller, cancel_state); |
| }); |
| } else { |
| EchoNonDelayed(context, request, response, controller, cancel_state); |
| } |
| } |
| |
| void CallbackTestServiceImpl::CheckClientInitialMetadata( |
| ServerContext* context, const SimpleRequest* request, |
| SimpleResponse* response, |
| experimental::ServerCallbackRpcController* controller) { |
| EXPECT_EQ(MetadataMatchCount(context->client_metadata(), |
| kCheckClientInitialMetadataKey, |
| kCheckClientInitialMetadataVal), |
| 1); |
| EXPECT_EQ(1u, |
| context->client_metadata().count(kCheckClientInitialMetadataKey)); |
| controller->Finish(Status::OK); |
| } |
| |
| void CallbackTestServiceImpl::EchoNonDelayed( |
| ServerContext* context, const EchoRequest* request, EchoResponse* response, |
| experimental::ServerCallbackRpcController* controller, |
| CancelState* cancel_state) { |
| int server_use_cancel_callback = |
| GetIntValueFromMetadata(kServerUseCancelCallback, |
| context->client_metadata(), DO_NOT_USE_CALLBACK); |
| |
| // Safe to clear cancel callback even if it wasn't set |
| controller->ClearCancelCallback(); |
| if (server_use_cancel_callback == MAYBE_USE_CALLBACK_EARLY_CANCEL || |
| server_use_cancel_callback == MAYBE_USE_CALLBACK_LATE_CANCEL) { |
| EXPECT_TRUE(context->IsCancelled()); |
| EXPECT_TRUE(cancel_state->callback_invoked.load(std::memory_order_relaxed)); |
| delete cancel_state; |
| controller->Finish(Status::CANCELLED); |
| return; |
| } |
| |
| EXPECT_FALSE(cancel_state->callback_invoked.load(std::memory_order_relaxed)); |
| delete cancel_state; |
| |
| if (request->has_param() && request->param().server_die()) { |
| gpr_log(GPR_ERROR, "The request should not reach application handler."); |
| GPR_ASSERT(0); |
| } |
| if (request->has_param() && request->param().has_expected_error()) { |
| const auto& error = request->param().expected_error(); |
| controller->Finish(Status(static_cast<StatusCode>(error.code()), |
| error.error_message(), |
| error.binary_error_details())); |
| return; |
| } |
| int server_try_cancel = GetIntValueFromMetadata( |
| kServerTryCancelRequest, context->client_metadata(), DO_NOT_CANCEL); |
| if (server_try_cancel > DO_NOT_CANCEL) { |
| // Since this is a unary RPC, by the time this server handler is called, |
| // the 'request' message is already read from the client. So the scenarios |
| // in server_try_cancel don't make much sense. Just cancel the RPC as long |
| // as server_try_cancel is not DO_NOT_CANCEL |
| EXPECT_FALSE(context->IsCancelled()); |
| context->TryCancel(); |
| gpr_log(GPR_INFO, "Server called TryCancel() to cancel the request"); |
| |
| if (server_use_cancel_callback == DO_NOT_USE_CALLBACK) { |
| // Now wait until it's really canceled |
| LoopUntilCancelled(&alarm_, context, controller, 1000); |
| } |
| return; |
| } |
| |
| gpr_log(GPR_DEBUG, "Request message was %s", request->message().c_str()); |
| 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; |
| } |
| if (server_use_cancel_callback == DO_NOT_USE_CALLBACK) { |
| // Now wait until it's really canceled |
| LoopUntilCancelled(&alarm_, context, controller, |
| request->param().client_cancel_after_us()); |
| } |
| return; |
| } else if (request->has_param() && |
| request->param().server_cancel_after_us()) { |
| alarm_.experimental().Set( |
| gpr_time_add( |
| gpr_now(GPR_CLOCK_REALTIME), |
| gpr_time_from_micros(request->param().server_cancel_after_us(), |
| GPR_TIMESPAN)), |
| [controller](bool) { controller->Finish(Status::CANCELLED); }); |
| return; |
| } else if (!request->has_param() || |
| !request->param().skip_cancelled_check()) { |
| 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)); |
| } |
| // Terminate rpc with error and debug info in trailer. |
| if (request->param().debug_info().stack_entries_size() || |
| !request->param().debug_info().detail().empty()) { |
| grpc::string serialized_debug_info = |
| request->param().debug_info().SerializeAsString(); |
| context->AddTrailingMetadata(kDebugInfoTrailerKey, serialized_debug_info); |
| controller->Finish(Status::CANCELLED); |
| return; |
| } |
| } |
| if (request->has_param() && |
| (request->param().expected_client_identity().length() > 0 || |
| request->param().check_auth_context())) { |
| CheckServerAuthContext(context, |
| request->param().expected_transport_security_type(), |
| 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()); |
| } |
| controller->Finish(Status::OK); |
| } |
| |
| // Unimplemented is left unimplemented to test the returned error. |
| |
| Status TestServiceImpl::RequestStream(ServerContext* context, |
| ServerReader<EchoRequest>* reader, |
| EchoResponse* response) { |
| // If 'server_try_cancel' is set in the metadata, the RPC is cancelled by |
| // the server by calling ServerContext::TryCancel() depending on the value: |
| // CANCEL_BEFORE_PROCESSING: The RPC is cancelled before the server reads |
| // any message from the client |
| // CANCEL_DURING_PROCESSING: The RPC is cancelled while the server is |
| // reading messages from the client |
| // CANCEL_AFTER_PROCESSING: The RPC is cancelled after the server reads |
| // all the messages from the client |
| int server_try_cancel = GetIntValueFromMetadata( |
| kServerTryCancelRequest, context->client_metadata(), DO_NOT_CANCEL); |
| |
| EchoRequest request; |
| response->set_message(""); |
| |
| if (server_try_cancel == CANCEL_BEFORE_PROCESSING) { |
| ServerTryCancel(context); |
| return Status::CANCELLED; |
| } |
| |
| std::thread* server_try_cancel_thd = nullptr; |
| if (server_try_cancel == CANCEL_DURING_PROCESSING) { |
| server_try_cancel_thd = |
| new std::thread([context] { ServerTryCancel(context); }); |
| } |
| |
| int num_msgs_read = 0; |
| while (reader->Read(&request)) { |
| response->mutable_message()->append(request.message()); |
| } |
| gpr_log(GPR_INFO, "Read: %d messages", num_msgs_read); |
| |
| if (server_try_cancel_thd != nullptr) { |
| server_try_cancel_thd->join(); |
| delete server_try_cancel_thd; |
| return Status::CANCELLED; |
| } |
| |
| if (server_try_cancel == CANCEL_AFTER_PROCESSING) { |
| ServerTryCancel(context); |
| return Status::CANCELLED; |
| } |
| |
| return Status::OK; |
| } |
| |
| // Return 'kNumResponseStreamMsgs' messages. |
| // TODO(yangg) make it generic by adding a parameter into EchoRequest |
| Status TestServiceImpl::ResponseStream(ServerContext* context, |
| const EchoRequest* request, |
| ServerWriter<EchoResponse>* writer) { |
| // If server_try_cancel is set in the metadata, the RPC is cancelled by the |
| // server by calling ServerContext::TryCancel() depending on the value: |
| // CANCEL_BEFORE_PROCESSING: The RPC is cancelled before the server writes |
| // any messages to the client |
| // CANCEL_DURING_PROCESSING: The RPC is cancelled while the server is |
| // writing messages to the client |
| // CANCEL_AFTER_PROCESSING: The RPC is cancelled after the server writes |
| // all the messages to the client |
| int server_try_cancel = GetIntValueFromMetadata( |
| kServerTryCancelRequest, context->client_metadata(), DO_NOT_CANCEL); |
| |
| int server_coalescing_api = GetIntValueFromMetadata( |
| kServerUseCoalescingApi, context->client_metadata(), 0); |
| |
| int server_responses_to_send = GetIntValueFromMetadata( |
| kServerResponseStreamsToSend, context->client_metadata(), |
| kServerDefaultResponseStreamsToSend); |
| |
| if (server_try_cancel == CANCEL_BEFORE_PROCESSING) { |
| ServerTryCancel(context); |
| return Status::CANCELLED; |
| } |
| |
| EchoResponse response; |
| std::thread* server_try_cancel_thd = nullptr; |
| if (server_try_cancel == CANCEL_DURING_PROCESSING) { |
| server_try_cancel_thd = |
| new std::thread([context] { ServerTryCancel(context); }); |
| } |
| |
| for (int i = 0; i < server_responses_to_send; i++) { |
| response.set_message(request->message() + grpc::to_string(i)); |
| if (i == server_responses_to_send - 1 && server_coalescing_api != 0) { |
| writer->WriteLast(response, WriteOptions()); |
| } else { |
| writer->Write(response); |
| } |
| } |
| |
| if (server_try_cancel_thd != nullptr) { |
| server_try_cancel_thd->join(); |
| delete server_try_cancel_thd; |
| return Status::CANCELLED; |
| } |
| |
| if (server_try_cancel == CANCEL_AFTER_PROCESSING) { |
| ServerTryCancel(context); |
| return Status::CANCELLED; |
| } |
| |
| return Status::OK; |
| } |
| |
| Status TestServiceImpl::BidiStream( |
| ServerContext* context, |
| ServerReaderWriter<EchoResponse, EchoRequest>* stream) { |
| // If server_try_cancel is set in the metadata, the RPC is cancelled by the |
| // server by calling ServerContext::TryCancel() depending on the value: |
| // CANCEL_BEFORE_PROCESSING: The RPC is cancelled before the server reads/ |
| // writes any messages from/to the client |
| // CANCEL_DURING_PROCESSING: The RPC is cancelled while the server is |
| // reading/writing messages from/to the client |
| // CANCEL_AFTER_PROCESSING: The RPC is cancelled after the server |
| // reads/writes all messages from/to the client |
| int server_try_cancel = GetIntValueFromMetadata( |
| kServerTryCancelRequest, context->client_metadata(), DO_NOT_CANCEL); |
| |
| EchoRequest request; |
| EchoResponse response; |
| |
| if (server_try_cancel == CANCEL_BEFORE_PROCESSING) { |
| ServerTryCancel(context); |
| return Status::CANCELLED; |
| } |
| |
| std::thread* server_try_cancel_thd = nullptr; |
| if (server_try_cancel == CANCEL_DURING_PROCESSING) { |
| server_try_cancel_thd = |
| new std::thread([context] { ServerTryCancel(context); }); |
| } |
| |
| // kServerFinishAfterNReads suggests after how many reads, the server should |
| // write the last message and send status (coalesced using WriteLast) |
| int server_write_last = GetIntValueFromMetadata( |
| kServerFinishAfterNReads, context->client_metadata(), 0); |
| |
| int read_counts = 0; |
| while (stream->Read(&request)) { |
| read_counts++; |
| gpr_log(GPR_INFO, "recv msg %s", request.message().c_str()); |
| response.set_message(request.message()); |
| if (read_counts == server_write_last) { |
| stream->WriteLast(response, WriteOptions()); |
| } else { |
| stream->Write(response); |
| } |
| } |
| |
| if (server_try_cancel_thd != nullptr) { |
| server_try_cancel_thd->join(); |
| delete server_try_cancel_thd; |
| return Status::CANCELLED; |
| } |
| |
| if (server_try_cancel == CANCEL_AFTER_PROCESSING) { |
| ServerTryCancel(context); |
| return Status::CANCELLED; |
| } |
| |
| return Status::OK; |
| } |
| |
| experimental::ServerReadReactor<EchoRequest, EchoResponse>* |
| CallbackTestServiceImpl::RequestStream() { |
| class Reactor : public ::grpc::experimental::ServerReadReactor<EchoRequest, |
| EchoResponse> { |
| public: |
| Reactor() {} |
| void OnStarted(ServerContext* context, EchoResponse* response) override { |
| ctx_ = context; |
| response_ = response; |
| // If 'server_try_cancel' is set in the metadata, the RPC is cancelled by |
| // the server by calling ServerContext::TryCancel() depending on the |
| // value: |
| // CANCEL_BEFORE_PROCESSING: The RPC is cancelled before the server |
| // reads any message from the client CANCEL_DURING_PROCESSING: The RPC |
| // is cancelled while the server is reading messages from the client |
| // CANCEL_AFTER_PROCESSING: The RPC is cancelled after the server reads |
| // all the messages from the client |
| server_try_cancel_ = GetIntValueFromMetadata( |
| kServerTryCancelRequest, context->client_metadata(), DO_NOT_CANCEL); |
| |
| response_->set_message(""); |
| |
| if (server_try_cancel_ == CANCEL_BEFORE_PROCESSING) { |
| ServerTryCancelNonblocking(ctx_); |
| return; |
| } |
| |
| if (server_try_cancel_ == CANCEL_DURING_PROCESSING) { |
| ctx_->TryCancel(); |
| // Don't wait for it here |
| } |
| |
| StartRead(&request_); |
| } |
| void OnDone() override { delete this; } |
| void OnCancel() override { |
| EXPECT_TRUE(ctx_->IsCancelled()); |
| FinishOnce(Status::CANCELLED); |
| } |
| void OnReadDone(bool ok) override { |
| if (ok) { |
| response_->mutable_message()->append(request_.message()); |
| num_msgs_read_++; |
| StartRead(&request_); |
| } else { |
| gpr_log(GPR_INFO, "Read: %d messages", num_msgs_read_); |
| |
| if (server_try_cancel_ == CANCEL_DURING_PROCESSING) { |
| // Let OnCancel recover this |
| return; |
| } |
| if (server_try_cancel_ == CANCEL_AFTER_PROCESSING) { |
| ServerTryCancelNonblocking(ctx_); |
| return; |
| } |
| FinishOnce(Status::OK); |
| } |
| } |
| |
| private: |
| void FinishOnce(const Status& s) { |
| std::lock_guard<std::mutex> l(finish_mu_); |
| if (!finished_) { |
| Finish(s); |
| finished_ = true; |
| } |
| } |
| |
| ServerContext* ctx_; |
| EchoResponse* response_; |
| EchoRequest request_; |
| int num_msgs_read_{0}; |
| int server_try_cancel_; |
| std::mutex finish_mu_; |
| bool finished_{false}; |
| }; |
| |
| return new Reactor; |
| } |
| |
| // Return 'kNumResponseStreamMsgs' messages. |
| // TODO(yangg) make it generic by adding a parameter into EchoRequest |
| experimental::ServerWriteReactor<EchoRequest, EchoResponse>* |
| CallbackTestServiceImpl::ResponseStream() { |
| class Reactor |
| : public ::grpc::experimental::ServerWriteReactor<EchoRequest, |
| EchoResponse> { |
| public: |
| Reactor() {} |
| void OnStarted(ServerContext* context, |
| const EchoRequest* request) override { |
| ctx_ = context; |
| request_ = request; |
| // If 'server_try_cancel' is set in the metadata, the RPC is cancelled by |
| // the server by calling ServerContext::TryCancel() depending on the |
| // value: |
| // CANCEL_BEFORE_PROCESSING: The RPC is cancelled before the server |
| // reads any message from the client CANCEL_DURING_PROCESSING: The RPC |
| // is cancelled while the server is reading messages from the client |
| // CANCEL_AFTER_PROCESSING: The RPC is cancelled after the server reads |
| // all the messages from the client |
| server_try_cancel_ = GetIntValueFromMetadata( |
| kServerTryCancelRequest, context->client_metadata(), DO_NOT_CANCEL); |
| server_coalescing_api_ = GetIntValueFromMetadata( |
| kServerUseCoalescingApi, context->client_metadata(), 0); |
| server_responses_to_send_ = GetIntValueFromMetadata( |
| kServerResponseStreamsToSend, context->client_metadata(), |
| kServerDefaultResponseStreamsToSend); |
| if (server_try_cancel_ == CANCEL_BEFORE_PROCESSING) { |
| ServerTryCancelNonblocking(ctx_); |
| return; |
| } |
| |
| if (server_try_cancel_ == CANCEL_DURING_PROCESSING) { |
| ctx_->TryCancel(); |
| } |
| if (num_msgs_sent_ < server_responses_to_send_) { |
| NextWrite(); |
| } |
| } |
| void OnDone() override { delete this; } |
| void OnCancel() override { |
| EXPECT_TRUE(ctx_->IsCancelled()); |
| FinishOnce(Status::CANCELLED); |
| } |
| void OnWriteDone(bool ok) override { |
| if (num_msgs_sent_ < server_responses_to_send_) { |
| NextWrite(); |
| } else if (server_coalescing_api_ != 0) { |
| // We would have already done Finish just after the WriteLast |
| } else if (server_try_cancel_ == CANCEL_DURING_PROCESSING) { |
| // Let OnCancel recover this |
| } else if (server_try_cancel_ == CANCEL_AFTER_PROCESSING) { |
| ServerTryCancelNonblocking(ctx_); |
| } else { |
| FinishOnce(Status::OK); |
| } |
| } |
| |
| private: |
| void FinishOnce(const Status& s) { |
| std::lock_guard<std::mutex> l(finish_mu_); |
| if (!finished_) { |
| Finish(s); |
| finished_ = true; |
| } |
| } |
| |
| void NextWrite() { |
| response_.set_message(request_->message() + |
| grpc::to_string(num_msgs_sent_)); |
| if (num_msgs_sent_ == server_responses_to_send_ - 1 && |
| server_coalescing_api_ != 0) { |
| num_msgs_sent_++; |
| StartWriteLast(&response_, WriteOptions()); |
| // If we use WriteLast, we shouldn't wait before attempting Finish |
| FinishOnce(Status::OK); |
| } else { |
| num_msgs_sent_++; |
| StartWrite(&response_); |
| } |
| } |
| ServerContext* ctx_; |
| const EchoRequest* request_; |
| EchoResponse response_; |
| int num_msgs_sent_{0}; |
| int server_try_cancel_; |
| int server_coalescing_api_; |
| int server_responses_to_send_; |
| std::mutex finish_mu_; |
| bool finished_{false}; |
| }; |
| return new Reactor; |
| } |
| |
| experimental::ServerBidiReactor<EchoRequest, EchoResponse>* |
| CallbackTestServiceImpl::BidiStream() { |
| class Reactor : public ::grpc::experimental::ServerBidiReactor<EchoRequest, |
| EchoResponse> { |
| public: |
| Reactor() {} |
| void OnStarted(ServerContext* context) override { |
| ctx_ = context; |
| // If 'server_try_cancel' is set in the metadata, the RPC is cancelled by |
| // the server by calling ServerContext::TryCancel() depending on the |
| // value: |
| // CANCEL_BEFORE_PROCESSING: The RPC is cancelled before the server |
| // reads any message from the client CANCEL_DURING_PROCESSING: The RPC |
| // is cancelled while the server is reading messages from the client |
| // CANCEL_AFTER_PROCESSING: The RPC is cancelled after the server reads |
| // all the messages from the client |
| server_try_cancel_ = GetIntValueFromMetadata( |
| kServerTryCancelRequest, context->client_metadata(), DO_NOT_CANCEL); |
| server_write_last_ = GetIntValueFromMetadata( |
| kServerFinishAfterNReads, context->client_metadata(), 0); |
| if (server_try_cancel_ == CANCEL_BEFORE_PROCESSING) { |
| ServerTryCancelNonblocking(ctx_); |
| return; |
| } |
| |
| if (server_try_cancel_ == CANCEL_DURING_PROCESSING) { |
| ctx_->TryCancel(); |
| } |
| |
| StartRead(&request_); |
| } |
| void OnDone() override { delete this; } |
| void OnCancel() override { |
| EXPECT_TRUE(ctx_->IsCancelled()); |
| FinishOnce(Status::CANCELLED); |
| } |
| void OnReadDone(bool ok) override { |
| if (ok) { |
| num_msgs_read_++; |
| gpr_log(GPR_INFO, "recv msg %s", request_.message().c_str()); |
| response_.set_message(request_.message()); |
| if (num_msgs_read_ == server_write_last_) { |
| StartWriteLast(&response_, WriteOptions()); |
| // If we use WriteLast, we shouldn't wait before attempting Finish |
| } else { |
| StartWrite(&response_); |
| return; |
| } |
| } |
| |
| if (server_try_cancel_ == CANCEL_DURING_PROCESSING) { |
| // Let OnCancel handle this |
| } else if (server_try_cancel_ == CANCEL_AFTER_PROCESSING) { |
| ServerTryCancelNonblocking(ctx_); |
| } else { |
| FinishOnce(Status::OK); |
| } |
| } |
| void OnWriteDone(bool ok) override { |
| std::lock_guard<std::mutex> l(finish_mu_); |
| if (!finished_) { |
| StartRead(&request_); |
| } |
| } |
| |
| private: |
| void FinishOnce(const Status& s) { |
| std::lock_guard<std::mutex> l(finish_mu_); |
| if (!finished_) { |
| Finish(s); |
| finished_ = true; |
| } |
| } |
| |
| ServerContext* ctx_; |
| EchoRequest request_; |
| EchoResponse response_; |
| int num_msgs_read_{0}; |
| int server_try_cancel_; |
| int server_write_last_; |
| std::mutex finish_mu_; |
| bool finished_{false}; |
| }; |
| |
| return new Reactor; |
| } |
| |
| } // namespace testing |
| } // namespace grpc |
