mirror of https://github.com/grpc/grpc.git
Merge pull request #17797 from nicolasnoble/channel
Folding the Channel class into the grpc_impl namespace.pull/18054/head
Nicolas Noble
6 years ago
committed by
GitHub
commit
c22b9620d3
35 changed files with 259 additions and 162 deletions
@ -0,0 +1,115 @@ |
||||
/*
|
||||
* |
||||
* Copyright 2015 gRPC authors. |
||||
* |
||||
* Licensed under the Apache License, Version 2.0 (the "License"); |
||||
* you may not use this file except in compliance with the License. |
||||
* You may obtain a copy of the License at |
||||
* |
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
* |
||||
* Unless required by applicable law or agreed to in writing, software |
||||
* distributed under the License is distributed on an "AS IS" BASIS, |
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
||||
* See the License for the specific language governing permissions and |
||||
* limitations under the License. |
||||
* |
||||
*/ |
||||
|
||||
#ifndef GRPCPP_CHANNEL_IMPL_H |
||||
#define GRPCPP_CHANNEL_IMPL_H |
||||
|
||||
#include <memory> |
||||
#include <mutex> |
||||
|
||||
#include <grpc/grpc.h> |
||||
#include <grpcpp/impl/call.h> |
||||
#include <grpcpp/impl/codegen/channel_interface.h> |
||||
#include <grpcpp/impl/codegen/client_interceptor.h> |
||||
#include <grpcpp/impl/codegen/config.h> |
||||
#include <grpcpp/impl/codegen/grpc_library.h> |
||||
|
||||
struct grpc_channel; |
||||
|
||||
namespace grpc_impl { |
||||
|
||||
namespace experimental { |
||||
/// Resets the channel's connection backoff.
|
||||
/// TODO(roth): Once we see whether this proves useful, either create a gRFC
|
||||
/// and change this to be a method of the Channel class, or remove it.
|
||||
void ChannelResetConnectionBackoff(Channel* channel); |
||||
} // namespace experimental
|
||||
|
||||
/// Channels represent a connection to an endpoint. Created by \a CreateChannel.
|
||||
class Channel final : public ::grpc::ChannelInterface, |
||||
public ::grpc::internal::CallHook, |
||||
public std::enable_shared_from_this<Channel>, |
||||
private ::grpc::GrpcLibraryCodegen { |
||||
public: |
||||
~Channel(); |
||||
|
||||
/// Get the current channel state. If the channel is in IDLE and
|
||||
/// \a try_to_connect is set to true, try to connect.
|
||||
grpc_connectivity_state GetState(bool try_to_connect) override; |
||||
|
||||
/// Returns the LB policy name, or the empty string if not yet available.
|
||||
grpc::string GetLoadBalancingPolicyName() const; |
||||
|
||||
/// Returns the service config in JSON form, or the empty string if
|
||||
/// not available.
|
||||
grpc::string GetServiceConfigJSON() const; |
||||
|
||||
private: |
||||
template <class InputMessage, class OutputMessage> |
||||
friend class ::grpc::internal::BlockingUnaryCallImpl; |
||||
friend void experimental::ChannelResetConnectionBackoff(Channel* channel); |
||||
friend std::shared_ptr<Channel> CreateChannelInternal( |
||||
const grpc::string& host, grpc_channel* c_channel, |
||||
std::vector<std::unique_ptr< |
||||
::grpc::experimental::ClientInterceptorFactoryInterface>> |
||||
interceptor_creators); |
||||
friend class ::grpc::internal::InterceptedChannel; |
||||
Channel(const grpc::string& host, grpc_channel* c_channel, |
||||
std::vector<std::unique_ptr< |
||||
::grpc::experimental::ClientInterceptorFactoryInterface>> |
||||
interceptor_creators); |
||||
|
||||
::grpc::internal::Call CreateCall(const ::grpc::internal::RpcMethod& method, |
||||
::grpc::ClientContext* context, |
||||
::grpc::CompletionQueue* cq) override; |
||||
void PerformOpsOnCall(::grpc::internal::CallOpSetInterface* ops, |
||||
::grpc::internal::Call* call) override; |
||||
void* RegisterMethod(const char* method) override; |
||||
|
||||
void NotifyOnStateChangeImpl(grpc_connectivity_state last_observed, |
||||
gpr_timespec deadline, |
||||
::grpc::CompletionQueue* cq, void* tag) override; |
||||
bool WaitForStateChangeImpl(grpc_connectivity_state last_observed, |
||||
gpr_timespec deadline) override; |
||||
|
||||
::grpc::CompletionQueue* CallbackCQ() override; |
||||
|
||||
::grpc::internal::Call CreateCallInternal( |
||||
const ::grpc::internal::RpcMethod& method, ::grpc::ClientContext* context, |
||||
::grpc::CompletionQueue* cq, size_t interceptor_pos) override; |
||||
|
||||
const grpc::string host_; |
||||
grpc_channel* const c_channel_; // owned
|
||||
|
||||
// mu_ protects callback_cq_ (the per-channel callbackable completion queue)
|
||||
std::mutex mu_; |
||||
|
||||
// callback_cq_ references the callbackable completion queue associated
|
||||
// with this channel (if any). It is set on the first call to CallbackCQ().
|
||||
// It is _not owned_ by the channel; ownership belongs with its internal
|
||||
// shutdown callback tag (invoked when the CQ is fully shutdown).
|
||||
::grpc::CompletionQueue* callback_cq_ = nullptr; |
||||
|
||||
std::vector< |
||||
std::unique_ptr<::grpc::experimental::ClientInterceptorFactoryInterface>> |
||||
interceptor_creators_; |
||||
}; |
||||
|
||||
} // namespace grpc_impl
|
||||
|
||||
#endif // GRPCPP_CHANNEL_IMPL_H
|
||||
Loading…
Reference in new issue