/*
** TP_Logging_Server.h,v 1.6 2002/10/18 22:16:06 bala Exp
**
** Copyright 2002 Addison Wesley. All Rights Reserved.
*/

#ifndef _TP_LOGGING_SERVER_H
#define _TP_LOGGING_SERVER_H

#include "ace/OS.h"
#include "ace/Auto_Ptr.h"
#include "ace/Singleton.h"
#include "ace/Synch.h"
#include "ace/Task.h"
#include "Logging_Acceptor.h"
#include "Logging_Event_Handler.h"
#include "Reactor_Logging_Server.h"
#include "TPLS_export.h"

class TP_Logging_Task : public ACE_Task<ACE_SYNCH> {
         // Instantiated with an MT synchronization trait.
public:
  enum { MAX_THREADS = 4 };

  virtual int open (void * = 0)
  { return activate (THR_NEW_LWP, MAX_THREADS); }

  virtual int put (ACE_Message_Block *mblk,
                   ACE_Time_Value *timeout = 0)
  { return putq (mblk, timeout); }

  virtual int svc (void);
};

typedef ACE_Unmanaged_Singleton<TP_Logging_Task, ACE_Null_Mutex>
        TP_LOGGING_TASK;

/*******************************************************/

class TP_Logging_Acceptor;

class TP_Logging_Handler : public Logging_Event_Handler {
  friend class TP_Logging_Acceptor;
protected:
  virtual ~TP_Logging_Handler () {} // No-op destructor.

  // Number of pointers to this class instance that currently
  // reside in the <TP_LOGGING_TASK> singleton's message queue.
  int queued_count_;

  // Indicates whether <Logging_Event_Handler::handle_close()>
  // must be called to cleanup and delete this object.
  int deferred_close_;

  // Serialize access to <queued_count_> and <deferred_close_>.
  ACE_SYNCH_MUTEX lock_;

public:
  TP_Logging_Handler (ACE_Reactor *reactor)
    : Logging_Event_Handler (reactor),
      queued_count_ (0),
      deferred_close_ (0) {}

  // Called when input events occur, e.g., connection or data.
  virtual int handle_input (ACE_HANDLE);

  // Called when this object is destroyed, e.g., when it's
  // removed from a reactor.
  virtual int handle_close (ACE_HANDLE, ACE_Reactor_Mask);
};

/*******************************************************/

class TP_Logging_Acceptor : public Logging_Acceptor {
public:
  TP_Logging_Acceptor (ACE_Reactor *r = ACE_Reactor::instance ())
    : Logging_Acceptor (r) {}

  virtual int handle_input (ACE_HANDLE) {
    TP_Logging_Handler *peer_handler = 0;
    ACE_NEW_RETURN (peer_handler,
                    TP_Logging_Handler (reactor ()), -1);
    if (acceptor_.accept (peer_handler->peer ()) == -1) {
      delete peer_handler;
      return -1;
    } else if (peer_handler->open () == -1)
      peer_handler->handle_close (ACE_INVALID_HANDLE, 0);
    return 0;
  }
};

/*******************************************************/

class TP_Logging_Server : public ACE_Service_Object {
protected:
  // Contains the reactor, acceptor, and handlers.
  typedef Reactor_Logging_Server<TP_Logging_Acceptor>
          LOGGING_DISPATCHER;
  LOGGING_DISPATCHER *logging_dispatcher_;

public:
  TP_Logging_Server (): logging_dispatcher_ (0) {}

  virtual int init (int argc, ACE_TCHAR *argv[]) {
    int i;
    char **array = 0;
    ACE_NEW_RETURN (array, char*[argc], -1);
    ACE_Auto_Array_Ptr<char *> char_argv (array);

    for (i = 0; i < argc; ++i)
      char_argv[i] = ACE::strnew (ACE_TEXT_ALWAYS_CHAR (argv[i]));
    ACE_NEW_NORETURN
      (logging_dispatcher_,
       TP_Logging_Server::LOGGING_DISPATCHER
       (i, char_argv.get (), ACE_Reactor::instance ()));
    for (i = 0; i < argc; ++i) ACE::strdelete (char_argv[i]);
    if (logging_dispatcher_ == 0) return -1;
    else return TP_LOGGING_TASK::instance ()->open ();
  }

  virtual int fini () {
    TP_LOGGING_TASK::instance ()->flush ();
    TP_LOGGING_TASK::instance ()->wait ();
    TP_LOGGING_TASK::close ();
    delete logging_dispatcher_;
    return 0;
  }
};

ACE_FACTORY_DECLARE (TPLS, TP_Logging_Handler)

#endif /* _TP_LOGGING_SERVER_H */
