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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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79 lines
2.7 KiB
79 lines
2.7 KiB
7 years ago
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/*
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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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