| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #ifndef GRPCXX_ASYNC_UNARY_CALL_H |
| #define GRPCXX_ASYNC_UNARY_CALL_H |
| |
| #include <grpc++/channel_interface.h> |
| #include <grpc++/client_context.h> |
| #include <grpc++/completion_queue.h> |
| #include <grpc++/server_context.h> |
| #include <grpc++/impl/call.h> |
| #include <grpc++/impl/service_type.h> |
| #include <grpc++/status.h> |
| #include <grpc/support/log.h> |
| |
| namespace grpc { |
| template <class R> |
| class ClientAsyncResponseReader GRPC_FINAL { |
| public: |
| ClientAsyncResponseReader(ChannelInterface* channel, CompletionQueue* cq, |
| const RpcMethod& method, ClientContext* context, |
| const grpc::protobuf::Message& request, void* tag) |
| : context_(context), |
| call_(channel->CreateCall(method, context, cq)) { |
| init_buf_.Reset(tag); |
| init_buf_.AddSendInitialMetadata(&context->send_initial_metadata_); |
| init_buf_.AddSendMessage(request); |
| init_buf_.AddClientSendClose(); |
| call_.PerformOps(&init_buf_); |
| } |
| |
| void ReadInitialMetadata(void* tag) { |
| GPR_ASSERT(!context_->initial_metadata_received_); |
| |
| meta_buf_.Reset(tag); |
| meta_buf_.AddRecvInitialMetadata(context_); |
| call_.PerformOps(&meta_buf_); |
| } |
| |
| void Finish(R* msg, Status* status, void* tag) { |
| finish_buf_.Reset(tag); |
| if (!context_->initial_metadata_received_) { |
| finish_buf_.AddRecvInitialMetadata(context_); |
| } |
| finish_buf_.AddRecvMessage(msg); |
| finish_buf_.AddClientRecvStatus(context_, status); |
| call_.PerformOps(&finish_buf_); |
| } |
| |
| private: |
| ClientContext* context_; |
| Call call_; |
| CallOpBuffer init_buf_; |
| CallOpBuffer meta_buf_; |
| CallOpBuffer finish_buf_; |
| }; |
| |
| template <class W> |
| class ServerAsyncResponseWriter GRPC_FINAL |
| : public ServerAsyncStreamingInterface { |
| public: |
| explicit ServerAsyncResponseWriter(ServerContext* ctx) |
| : call_(nullptr, nullptr, nullptr), ctx_(ctx) {} |
| |
| void SendInitialMetadata(void* tag) GRPC_OVERRIDE { |
| GPR_ASSERT(!ctx_->sent_initial_metadata_); |
| |
| meta_buf_.Reset(tag); |
| meta_buf_.AddSendInitialMetadata(&ctx_->initial_metadata_); |
| ctx_->sent_initial_metadata_ = true; |
| call_.PerformOps(&meta_buf_); |
| } |
| |
| void Finish(const W& msg, const Status& status, void* tag) { |
| finish_buf_.Reset(tag); |
| if (!ctx_->sent_initial_metadata_) { |
| finish_buf_.AddSendInitialMetadata(&ctx_->initial_metadata_); |
| ctx_->sent_initial_metadata_ = true; |
| } |
| // The response is dropped if the status is not OK. |
| if (status.IsOk()) { |
| finish_buf_.AddSendMessage(msg); |
| } |
| finish_buf_.AddServerSendStatus(&ctx_->trailing_metadata_, status); |
| call_.PerformOps(&finish_buf_); |
| } |
| |
| void FinishWithError(const Status& status, void* tag) { |
| GPR_ASSERT(!status.IsOk()); |
| finish_buf_.Reset(tag); |
| if (!ctx_->sent_initial_metadata_) { |
| finish_buf_.AddSendInitialMetadata(&ctx_->initial_metadata_); |
| ctx_->sent_initial_metadata_ = true; |
| } |
| finish_buf_.AddServerSendStatus(&ctx_->trailing_metadata_, status); |
| call_.PerformOps(&finish_buf_); |
| } |
| |
| private: |
| void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; } |
| |
| Call call_; |
| ServerContext* ctx_; |
| CallOpBuffer meta_buf_; |
| CallOpBuffer finish_buf_; |
| }; |
| |
| } // namespace grpc |
| |
| #endif // GRPCXX_ASYNC_UNARY_CALL_H |