////////////////////////////////////////////////////////////////////////////////
/// @brief task for general communication
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2010-2011 triagens GmbH, Cologne, Germany
///
/// 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.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
/// @author Achim Brandt
/// @author Copyright 2009-2011, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

#ifndef TRIAGENS_FYN_GENERAL_SERVER_GENERAL_ASYNC_COMM_TASK_H
#define TRIAGENS_FYN_GENERAL_SERVER_GENERAL_ASYNC_COMM_TASK_H 1

#include "GeneralServer/GeneralCommTask.h"

#include <Basics/Exceptions.h>

#include "Scheduler/AsyncTask.h"
#include "Rest/Handler.h"

namespace triagens {
  namespace rest {

    ////////////////////////////////////////////////////////////////////////////////
    /// @brief task for general communication
    ////////////////////////////////////////////////////////////////////////////////

    template<typename S, typename HF, typename T>
    class GeneralAsyncCommTask : public T, public AsyncTask {
      GeneralAsyncCommTask (GeneralAsyncCommTask const&);
      GeneralAsyncCommTask& operator= (GeneralAsyncCommTask const&);

      public:

        ////////////////////////////////////////////////////////////////////////////////
        /// @brief constructs a new task with a given socket
        ////////////////////////////////////////////////////////////////////////////////

        GeneralAsyncCommTask (S* server, socket_t fd, ConnectionInfo const& info)
          : Task("GeneralAsyncCommTask"),
            T(server, fd, info),
            _handler(0) {
        }

      protected:

        ////////////////////////////////////////////////////////////////////////////////
        /// @brief destructs a task
        ////////////////////////////////////////////////////////////////////////////////

        ~GeneralAsyncCommTask () {
        }

        ////////////////////////////////////////////////////////////////////////////////
        /// {@inheritDoc}
        ////////////////////////////////////////////////////////////////////////////////

        void setup (Scheduler* scheduler, EventLoop loop) {
          SocketTask::setup(scheduler, loop);
          AsyncTask::setup(scheduler, loop);
        }

        ////////////////////////////////////////////////////////////////////////////////
        /// {@inheritDoc}
        ////////////////////////////////////////////////////////////////////////////////

        void cleanup () {
          SocketTask::cleanup();
          AsyncTask::cleanup();
        }

        ////////////////////////////////////////////////////////////////////////////////
        /// {@inheritDoc}
        ////////////////////////////////////////////////////////////////////////////////

        bool handleEvent (EventToken token, EventType events) {
          bool result = T::handleEvent(token, events);

          if (result) {
            result = AsyncTask::handleEvent(token, events);
          }

          return result;
        }

      public:

        ////////////////////////////////////////////////////////////////////////////////
        /// @brief set the handler
        ////////////////////////////////////////////////////////////////////////////////

        void setHandler (Handler* handler) {
          _handler = handler;
        }

        
      protected:

        ////////////////////////////////////////////////////////////////////////////////
        /// @brief handles the signal
        ////////////////////////////////////////////////////////////////////////////////

        bool handleAsync () {
          if (_handler == 0) {
            return true;
          }

          return _handler->handleAsync();
        }

      private:
        Handler* _handler;
    };
  }
}

#endif