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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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78 lines
2.7 KiB
78 lines
2.7 KiB
/* |
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* |
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* Copyright 2015 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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#ifndef GRPCPP_CHANNEL_H |
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#define GRPCPP_CHANNEL_H |
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#include <memory> |
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#include <grpc/grpc.h> |
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#include <grpcpp/impl/call.h> |
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#include <grpcpp/impl/codegen/channel_interface.h> |
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#include <grpcpp/impl/codegen/config.h> |
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#include <grpcpp/impl/codegen/grpc_library.h> |
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struct grpc_channel; |
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namespace grpc { |
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/// Channels represent a connection to an endpoint. Created by \a CreateChannel. |
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class Channel final : public ChannelInterface, |
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public internal::CallHook, |
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public std::enable_shared_from_this<Channel>, |
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private GrpcLibraryCodegen { |
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public: |
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~Channel(); |
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/// Get the current channel state. If the channel is in IDLE and |
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/// \a try_to_connect is set to true, try to connect. |
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grpc_connectivity_state GetState(bool try_to_connect) override; |
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/// Returns the LB policy name, or the empty string if not yet available. |
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grpc::string GetLoadBalancingPolicyName() const; |
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/// Returns the service config in JSON form, or the empty string if |
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/// not available. |
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grpc::string GetServiceConfigJSON() const; |
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private: |
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template <class InputMessage, class OutputMessage> |
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friend class internal::BlockingUnaryCallImpl; |
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friend std::shared_ptr<Channel> CreateChannelInternal( |
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const grpc::string& host, grpc_channel* c_channel); |
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Channel(const grpc::string& host, grpc_channel* c_channel); |
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internal::Call CreateCall(const internal::RpcMethod& method, |
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ClientContext* context, |
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CompletionQueue* cq) override; |
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void PerformOpsOnCall(internal::CallOpSetInterface* ops, |
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internal::Call* call) override; |
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void* RegisterMethod(const char* method) override; |
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void NotifyOnStateChangeImpl(grpc_connectivity_state last_observed, |
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gpr_timespec deadline, CompletionQueue* cq, |
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void* tag) override; |
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bool WaitForStateChangeImpl(grpc_connectivity_state last_observed, |
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gpr_timespec deadline) override; |
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const grpc::string host_; |
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grpc_channel* const c_channel_; // owned |
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}; |
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} // namespace grpc |
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#endif // GRPCPP_CHANNEL_H
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