include/grpc++/server.h

/*
 *
 * Copyright 2014, 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:
 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * 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
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#ifndef __GRPCPP_SERVER_H__
#define __GRPCPP_SERVER_H__

#include <condition_variable>
#include <map>
#include <memory>
#include <mutex>

#include <grpc++/completion_queue.h>
#include <grpc++/config.h>
#include <grpc++/status.h>

struct grpc_server;

namespace google {
namespace protobuf {
class Message;
}
}

namespace grpc {
class AsyncServerContext;
class RpcService;
class RpcServiceMethod;
class ThreadPoolInterface;

// Currently it only supports handling rpcs in a single thread.
class Server {
 public:
  ~Server();

  // Shutdown the server, block until all rpc processing finishes.
  void Shutdown();

 private:
  friend class ServerBuilder;

  // ServerBuilder use only
  explicit Server(ThreadPoolInterface* thread_pool);
  Server();
  // Register a service. This call does not take ownership of the service.
  // The service must exist for the lifetime of the Server instance.
  void RegisterService(RpcService* service);
  // Add a listening port. Can be called multiple times.
  void AddPort(const grpc::string& addr);
  // Start the server.
  void Start();

  void AllowOneRpc();
  void HandleQueueClosed();
  void RunRpc();
  void ScheduleCallback();

  // 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_;

  // Pointer to the c grpc server.
  grpc_server* server_;

  // A map for all method information.
  std::map<grpc::string, RpcServiceMethod*> method_map_;

  ThreadPoolInterface* thread_pool_;
  // Whether the thread pool is created and owned by the server.
  bool thread_pool_owned_;
};

}  // namespace grpc

#endif  // __GRPCPP_SERVER_H__