1 /* 2 * 3 * Copyright 2019 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #ifndef GRPCPP_IMPL_CODEGEN_DELEGATING_CHANNEL_H 20 #define GRPCPP_IMPL_CODEGEN_DELEGATING_CHANNEL_H 21 22 #include <memory> 23 24 #include <grpcpp/impl/codegen/channel_interface.h> 25 26 namespace grpc { 27 namespace experimental { 28 29 class DelegatingChannel : public ::grpc::ChannelInterface { 30 public: ~DelegatingChannel()31 ~DelegatingChannel() override {} 32 DelegatingChannel(std::shared_ptr<::grpc::ChannelInterface> delegate_channel)33 explicit DelegatingChannel( 34 std::shared_ptr<::grpc::ChannelInterface> delegate_channel) 35 : delegate_channel_(delegate_channel) {} 36 GetState(bool try_to_connect)37 grpc_connectivity_state GetState(bool try_to_connect) override { 38 return delegate_channel()->GetState(try_to_connect); 39 } 40 delegate_channel()41 std::shared_ptr<::grpc::ChannelInterface> delegate_channel() { 42 return delegate_channel_; 43 } 44 45 private: CreateCall(const internal::RpcMethod & method,ClientContext * context,::grpc::CompletionQueue * cq)46 internal::Call CreateCall(const internal::RpcMethod& method, 47 ClientContext* context, 48 ::grpc::CompletionQueue* cq) final { 49 return delegate_channel()->CreateCall(method, context, cq); 50 } 51 PerformOpsOnCall(internal::CallOpSetInterface * ops,internal::Call * call)52 void PerformOpsOnCall(internal::CallOpSetInterface* ops, 53 internal::Call* call) final { 54 delegate_channel()->PerformOpsOnCall(ops, call); 55 } 56 RegisterMethod(const char * method)57 void* RegisterMethod(const char* method) final { 58 return delegate_channel()->RegisterMethod(method); 59 } 60 NotifyOnStateChangeImpl(grpc_connectivity_state last_observed,gpr_timespec deadline,::grpc::CompletionQueue * cq,void * tag)61 void NotifyOnStateChangeImpl(grpc_connectivity_state last_observed, 62 gpr_timespec deadline, 63 ::grpc::CompletionQueue* cq, 64 void* tag) override { 65 delegate_channel()->NotifyOnStateChangeImpl(last_observed, deadline, cq, 66 tag); 67 } 68 WaitForStateChangeImpl(grpc_connectivity_state last_observed,gpr_timespec deadline)69 bool WaitForStateChangeImpl(grpc_connectivity_state last_observed, 70 gpr_timespec deadline) override { 71 return delegate_channel()->WaitForStateChangeImpl(last_observed, deadline); 72 } 73 CreateCallInternal(const internal::RpcMethod & method,ClientContext * context,::grpc::CompletionQueue * cq,size_t interceptor_pos)74 internal::Call CreateCallInternal(const internal::RpcMethod& method, 75 ClientContext* context, 76 ::grpc::CompletionQueue* cq, 77 size_t interceptor_pos) final { 78 return delegate_channel()->CreateCallInternal(method, context, cq, 79 interceptor_pos); 80 } 81 CallbackCQ()82 ::grpc::CompletionQueue* CallbackCQ() final { 83 return delegate_channel()->CallbackCQ(); 84 } 85 86 std::shared_ptr<::grpc::ChannelInterface> delegate_channel_; 87 }; 88 89 } // namespace experimental 90 } // namespace grpc 91 92 #endif // GRPCPP_IMPL_CODEGEN_DELEGATING_CHANNEL_H 93