server.h

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#ifndef GRPCXX_SERVER_H
#define GRPCXX_SERVER_H

#include <list>
#include <memory>
#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++/impl/sync.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 GenericServerContext;
class AsyncGenericService;
class ServerAsyncStreamingInterface;
class ServerContext;
class ServerInitializer;
class ThreadPoolInterface;

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

  void Wait() GRPC_OVERRIDE;

  class GlobalCallbacks {
   public:
    virtual ~GlobalCallbacks() {}
    virtual void UpdateArguments(ChannelArguments* args) {}
    virtual void PreSynchronousRequest(ServerContext* context) = 0;
    virtual void PostSynchronousRequest(ServerContext* context) = 0;
  };
  static void SetGlobalCallbacks(GlobalCallbacks* callbacks);

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

  // Returns a \em raw pointer to the underlying CompletionQueue.
  CompletionQueue* completion_queue();

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

  class SyncRequest;
  class AsyncRequest;
  class ShutdownRequest;

  class UnimplementedAsyncRequestContext;
  class UnimplementedAsyncRequest;
  class UnimplementedAsyncResponse;

  Server(ThreadPoolInterface* thread_pool, bool thread_pool_owned,
         int max_message_size, ChannelArguments* args);

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

  void RegisterAsyncGenericService(AsyncGenericService* service) GRPC_OVERRIDE;

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

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

  void RunRpc() GRPC_OVERRIDE;

  void ScheduleCallback() GRPC_OVERRIDE;

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

  void ShutdownInternal(gpr_timespec deadline) GRPC_OVERRIDE;

  int max_message_size() const GRPC_OVERRIDE { return max_message_size_; };

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

  ServerInitializer* initializer();

  const int max_message_size_;

  // Completion queue.
  CompletionQueue cq_;

  // Sever status
  grpc::mutex mu_;
  bool started_;
  bool shutdown_;
  bool shutdown_notified_;
  // The number of threads which are running callbacks.
  int num_running_cb_;
  grpc::condition_variable callback_cv_;

  grpc::condition_variable shutdown_cv_;

  std::shared_ptr<GlobalCallbacks> global_callbacks_;

  std::list<SyncRequest>* sync_methods_;
  std::vector<grpc::string> services_;
  std::unique_ptr<RpcServiceMethod> unknown_method_;
  bool has_generic_service_;

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

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

  std::unique_ptr<ServerInitializer> server_initializer_;
};

}  // namespace grpc

#endif  // GRPCXX_SERVER_H