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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef GRPCXX_SERVER_H
#define GRPCXX_SERVER_H
#include <condition_variable>
#include <list>
#include <memory>
#include <mutex>
#include <grpc++/completion_queue.h>
#include <grpc++/config.h>
#include <grpc++/impl/call.h>
#include <grpc++/impl/service_type.h>
#include <grpc++/status.h>
struct grpc_server;
namespace grpc {
class AsynchronousService;
class GenericServerContext;
class AsyncGenericService;
class RpcService;
class RpcServiceMethod;
class ServerCredentials;
class ThreadPoolInterface;
// Currently it only supports handling rpcs in a single thread.
class Server GRPC_FINAL : private CallHook,
private AsynchronousService::DispatchImpl {
public:
~Server();
// Shutdown the server, block until all rpc processing finishes.
void Shutdown();
// Block waiting for all work to complete (the server must either
// be shutting down or some other thread must call Shutdown for this
// function to ever return)
void Wait();
private:
friend class AsyncGenericService;
friend class ServerBuilder;
class SyncRequest;
class AsyncRequest;
// ServerBuilder use only
Server(ThreadPoolInterface* thread_pool, bool thread_pool_owned);
Server() = delete;
// Register a service. This call does not take ownership of the service.
// The service must exist for the lifetime of the Server instance.
bool RegisterService(RpcService* service);
bool RegisterAsyncService(AsynchronousService* service);
void RegisterAsyncGenericService(AsyncGenericService* service);
// Add a listening port. Can be called multiple times.
int AddPort(const grpc::string& addr, ServerCredentials* creds);
// Start the server.
bool Start();
void HandleQueueClosed();
void RunRpc();
void ScheduleCallback();
void PerformOpsOnCall(CallOpBuffer* ops, Call* call) GRPC_OVERRIDE;
// DispatchImpl
void RequestAsyncCall(void* registered_method, ServerContext* context,
grpc::protobuf::Message* request,
ServerAsyncStreamingInterface* stream,
CompletionQueue* cq, void* tag) GRPC_OVERRIDE;
void RequestAsyncGenericCall(GenericServerContext* context,
ServerAsyncStreamingInterface* stream,
CompletionQueue* cq, void* tag);
// Completion queue.
CompletionQueue cq_;
// Sever status
std::mutex mu_;
bool started_;
bool shutdown_;
// The number of threads which are running callbacks.
int num_running_cb_;
std::condition_variable callback_cv_;
std::list<SyncRequest> sync_methods_;
// Pointer to the c grpc server.
grpc_server* const server_;
ThreadPoolInterface* thread_pool_;
// Whether the thread pool is created and owned by the server.
bool thread_pool_owned_;
};
} // namespace grpc
#endif // GRPCXX_SERVER_H
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