server.h

Go to the documentation of this file.

/*
 *
 * 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 <vector>

#include <grpc++/completion_queue.h>
#include <grpc++/impl/call.h>
#include <grpc++/impl/codegen/grpc_library.h>
#include <grpc++/impl/codegen/server_interface.h>
#include <grpc++/impl/rpc_service_method.h>
#include <grpc++/security/server_credentials.h>
#include <grpc++/support/channel_arguments.h>
#include <grpc++/support/config.h>
#include <grpc++/support/status.h>
#include <grpc/compression.h>

struct grpc_server;

namespace grpc {

class AsyncGenericService;
class HealthCheckServiceInterface;
class ServerContext;
class ServerInitializer;

class Server final : public ServerInterface, private GrpcLibraryCodegen {
 public:
  ~Server();

  void Wait() override;

  class GlobalCallbacks {
   public:
    virtual ~GlobalCallbacks() {}
    virtual void UpdateArguments(ChannelArguments* args) {}
    virtual void PreSynchronousRequest(ServerContext* context) = 0;
    virtual void PostSynchronousRequest(ServerContext* context) = 0;
    virtual void PreServerStart(Server* server) {}
    virtual void AddPort(Server* server, int port) {}
  };
  static void SetGlobalCallbacks(GlobalCallbacks* callbacks);

  // Returns a \em raw pointer to the underlying grpc_server instance.
  grpc_server* c_server();

  HealthCheckServiceInterface* GetHealthCheckService() const {
    return health_check_service_.get();
  }

 private:
  friend class AsyncGenericService;
  friend class ServerBuilder;
  friend class ServerInitializer;

  class SyncRequest;
  class AsyncRequest;
  class ShutdownRequest;

  class SyncRequestThreadManager;

  class UnimplementedAsyncRequestContext;
  class UnimplementedAsyncRequest;
  class UnimplementedAsyncResponse;

  Server(int max_message_size, ChannelArguments* args,
         std::shared_ptr<std::vector<std::unique_ptr<ServerCompletionQueue>>>
             sync_server_cqs,
         int min_pollers, int max_pollers, int sync_cq_timeout_msec);

  bool RegisterService(const grpc::string* host, Service* service) override;

  void RegisterAsyncGenericService(AsyncGenericService* service) override;

  int AddListeningPort(const grpc::string& addr,
                       ServerCredentials* creds) override;

  bool Start(ServerCompletionQueue** cqs, size_t num_cqs) override;

  void PerformOpsOnCall(CallOpSetInterface* ops, Call* call) override;

  void ShutdownInternal(gpr_timespec deadline) override;

  int max_receive_message_size() const override {
    return max_receive_message_size_;
  };

  grpc_server* server() override { return server_; };

  ServerInitializer* initializer();

  const int max_receive_message_size_;

  std::shared_ptr<std::vector<std::unique_ptr<ServerCompletionQueue>>>
      sync_server_cqs_;

  std::vector<std::unique_ptr<SyncRequestThreadManager>> sync_req_mgrs_;

  // Sever status
  std::mutex mu_;
  bool started_;
  bool shutdown_;
  bool shutdown_notified_;  // Was notify called on the shutdown_cv_

  std::condition_variable shutdown_cv_;

  std::shared_ptr<GlobalCallbacks> global_callbacks_;

  std::vector<grpc::string> services_;
  bool has_generic_service_;

  // Pointer to the wrapped grpc_server.
  grpc_server* server_;

  std::unique_ptr<ServerInitializer> server_initializer_;

  std::unique_ptr<HealthCheckServiceInterface> health_check_service_;
  bool health_check_service_disabled_;
};

}  // namespace grpc

#endif  // GRPCXX_SERVER_H