Craig Tiller
10 years ago
parent
40fcdaff0a
commit
b470169252
8 changed files with 14 additions and 223 deletions
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/*
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* |
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* Copyright 2014, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include "src/cpp/server/server_rpc_handler.h" |
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#include <grpc/support/log.h> |
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#include "src/cpp/server/server_context_impl.h" |
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#include "src/cpp/stream/stream_context.h" |
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#include <grpc++/async_server_context.h> |
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#include <grpc++/impl/rpc_service_method.h> |
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namespace grpc { |
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ServerRpcHandler::ServerRpcHandler(AsyncServerContext *async_server_context, |
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RpcServiceMethod *method) |
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: async_server_context_(async_server_context), method_(method) {} |
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void ServerRpcHandler::StartRpc() { |
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if (method_ == nullptr) { |
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// Method not supported, finish the rpc with error.
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// TODO(rocking): do we need to call read to consume the request?
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FinishRpc(Status(StatusCode::UNIMPLEMENTED, "No such method.")); |
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return; |
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} |
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ServerContextImpl user_context(async_server_context_->absolute_deadline()); |
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if (method_->method_type() == RpcMethod::NORMAL_RPC) { |
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// Start the rpc on this dedicated completion queue.
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async_server_context_->Accept(cq_.cq()); |
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// Allocate request and response.
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std::unique_ptr<google::protobuf::Message> request( |
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method_->AllocateRequestProto()); |
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std::unique_ptr<google::protobuf::Message> response( |
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method_->AllocateResponseProto()); |
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// Read request
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async_server_context_->StartRead(request.get()); |
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auto type = WaitForNextEvent(); |
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GPR_ASSERT(type == CompletionQueue::SERVER_READ_OK); |
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// Run the application's rpc handler
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MethodHandler *handler = method_->handler(); |
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Status status = handler->RunHandler(MethodHandler::HandlerParameter( |
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&user_context, request.get(), response.get())); |
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if (status.IsOk()) { |
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// Send the response if we get an ok status.
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async_server_context_->StartWrite(*response, GRPC_WRITE_BUFFER_HINT); |
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type = WaitForNextEvent(); |
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if (type != CompletionQueue::SERVER_WRITE_OK) { |
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status = Status(StatusCode::INTERNAL, "Error writing response."); |
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} |
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} |
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FinishRpc(status); |
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} else { |
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// Allocate request and response.
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// TODO(yangg) maybe not allocate both when not needed?
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std::unique_ptr<google::protobuf::Message> request( |
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method_->AllocateRequestProto()); |
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std::unique_ptr<google::protobuf::Message> response( |
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method_->AllocateResponseProto()); |
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StreamContext stream_context(*method_, async_server_context_->call(), |
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cq_.cq(), request.get(), response.get()); |
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// Run the application's rpc handler
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MethodHandler *handler = method_->handler(); |
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Status status = handler->RunHandler(MethodHandler::HandlerParameter( |
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&user_context, request.get(), response.get(), &stream_context)); |
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if (status.IsOk() && |
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method_->method_type() == RpcMethod::CLIENT_STREAMING) { |
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stream_context.Write(response.get(), false); |
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} |
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// TODO(yangg) Do we need to consider the status in stream_context?
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FinishRpc(status); |
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} |
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} |
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CompletionQueue::CompletionType ServerRpcHandler::WaitForNextEvent() { |
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void *tag = nullptr; |
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CompletionQueue::CompletionType type = cq_.Next(&tag); |
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if (type != CompletionQueue::QUEUE_CLOSED && |
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type != CompletionQueue::RPC_END) { |
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GPR_ASSERT(static_cast<AsyncServerContext *>(tag) == |
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async_server_context_.get()); |
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} |
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return type; |
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} |
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void ServerRpcHandler::FinishRpc(const Status &status) { |
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async_server_context_->StartWriteStatus(status); |
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CompletionQueue::CompletionType type; |
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// HALFCLOSE_OK and RPC_END events come in either order.
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type = WaitForNextEvent(); |
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GPR_ASSERT(type == CompletionQueue::HALFCLOSE_OK || |
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type == CompletionQueue::RPC_END); |
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type = WaitForNextEvent(); |
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GPR_ASSERT(type == CompletionQueue::HALFCLOSE_OK || |
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type == CompletionQueue::RPC_END); |
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cq_.Shutdown(); |
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type = WaitForNextEvent(); |
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GPR_ASSERT(type == CompletionQueue::QUEUE_CLOSED); |
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} |
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} // namespace grpc
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@ -1,67 +0,0 @@ |
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/*
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* |
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* Copyright 2014, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#ifndef __GRPCPP_INTERNAL_SERVER_SERVER_RPC_HANDLER_H__ |
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#define __GRPCPP_INTERNAL_SERVER_SERVER_RPC_HANDLER_H__ |
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#include <memory> |
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#include <grpc++/completion_queue.h> |
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#include <grpc++/status.h> |
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namespace grpc { |
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class
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class ServerContext; |
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class RpcServiceMethod; |
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class ServerRpcHandler { |
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public: |
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ServerRpcHandler(Call *call, |
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ServerContext *server_context, |
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RpcServiceMethod *method); |
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void StartRpc(); |
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private: |
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void FinishRpc(const Status &status); |
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Call *call_; |
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ServerContext* server_context_; |
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RpcServiceMethod *method_; |
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CompletionQueue cq_; |
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}; |
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} // namespace grpc
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#endif // __GRPCPP_INTERNAL_SERVER_SERVER_RPC_HANDLER_H__
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