message_receiver.h

ACE自适配通信环境（ADAPTIVE Communication Environment）是可以自由使用、开放源码的面向对象（OO）框架（Framework）

/**
 * Message_Receiver.h,v 1.1 2004/01/01 21:01:00 shuston Exp
 *
 * Sample code from The ACE Programmer's Guide,
 * copyright 2003 Addison-Wesley. All Rights Reserved.
 */

#ifndef __MESSAGE_RECEIVER_H_
#define __MESSAGE_RECEIVER_H_

#include "ace/Log_Msg.h"
#include "ace/Message_Block.h"
#include "ace/SOCK_Stream.h"
#include "ace/Svc_Handler.h"
#include "ace/Synch.h"
#include "ace/Task.h"

// Listing 1 code/ch12
struct DeviceCommandHeader
{
  int length_;
  int deviceId_;
};
// Listing 1

class HA_Device_Repository
{
public:
  HA_Device_Repository ();

  int update_device (int device_id, char *commands);
    
private:
  ACE_Task_Base *owner_;
};

HA_Device_Repository::HA_Device_Repository ()
{ }

int
HA_Device_Repository::update_device (int, char *)
{
  return 0;
}

class HA_CommandHandler : public ACE_Task<ACE_MT_SYNCH>
{
public:
  HA_CommandHandler (HA_Device_Repository &rep) : rep_(rep)
  { }

  virtual int svc();

private:
  HA_Device_Repository &rep_;
};

class Message_Receiver :
  public ACE_Svc_Handler<ACE_SOCK_STREAM, ACE_MT_SYNCH>
{
public:
  Message_Receiver () : handler_(0)
  {
    ACE_ASSERT(0);
  }
  
  Message_Receiver (HA_CommandHandler *ch) : handler_(ch)
  { }

  ACE_Message_Block *shut_down_message (void);
    
  virtual int handle_input (ACE_HANDLE fd);

  virtual int handle_close (ACE_HANDLE = ACE_INVALID_HANDLE,
                            ACE_Reactor_Mask = ACE_Event_Handler::ALL_EVENTS_MASK)
  {
    this->peer ().close ();
    delete this;
    return 0;
  }
    
private:
  int read_header (DeviceCommandHeader *dch);
  int copy_payload (ACE_Message_Block *mb, int payload_length);

private:
  HA_CommandHandler *handler_;
};

#endif /* __MESSAGE_RECEIVER_H */