#include "LF_CH_Event.h"
#include "ace/Log_Msg.h"


#if !defined (__ACE_INLINE__)
# include "LF_CH_Event.inl"
#endif /* __ACE_INLINE__ */

ACE_RCSID(tao,
          LF_Invocation_Event,
          "$Id: LF_Event.cpp,v 1.4 2002/04/27 21:49:58 bala Exp $")

TAO_LF_CH_Event::TAO_LF_CH_Event (void)
  : TAO_LF_Event (),
    prev_state_ (TAO_LF_Event::LFS_IDLE)

{
}

TAO_LF_CH_Event::~TAO_LF_CH_Event (void)
{
}

void
TAO_LF_CH_Event::state_changed_i (int new_state)
{
  if (this->state_ == new_state)
    return;

    // Validate the state change
  if (this->state_ == TAO_LF_Event::LFS_IDLE)
    {
      // From the LFS_IDLE state we can only become active.
      if (new_state == TAO_LF_Event::LFS_CONNECTION_WAIT)
        {
          this->prev_state_ = this->state_;
          this->state_ = new_state;
        }
      return;
    }
  else if (this->state_ == TAO_LF_Event::LFS_CONNECTION_WAIT)
    {
      // Only a few states are possible from CONNECTION_WAIT states
      if (new_state == TAO_LF_Event::LFS_CONNECTION_CLOSED
          || new_state == TAO_LF_Event::LFS_SUCCESS)
        {
          this->prev_state_ = this->state_;
          this->state_ = new_state;
        }

      return;
    }
  else if (this->state_ == TAO_LF_Event::LFS_SUCCESS)
    {
      if (new_state == TAO_LF_Event::LFS_CONNECTION_CLOSED)
        {
          this->prev_state_ = this->state_;
          this->state_ = new_state;
        }
      return;
    }

  return;
}


int
TAO_LF_CH_Event::successful (void) const
{
  if (this->prev_state_ == TAO_LF_Event::LFS_CONNECTION_WAIT)
    return this->state_ == TAO_LF_Event::LFS_SUCCESS;
  else if (this->prev_state_ == TAO_LF_Event::LFS_SUCCESS)
    return this->state_ == TAO_LF_Event::LFS_CONNECTION_CLOSED;

  return 0;
}

int
TAO_LF_CH_Event::error_detected (void) const
{
  if (this->prev_state_ == TAO_LF_Event::LFS_CONNECTION_WAIT)
    return this->state_ == TAO_LF_Event::LFS_CONNECTION_CLOSED;
  else if (this->prev_state_ == TAO_LF_Event::LFS_SUCCESS)
    return (this->state_ != TAO_LF_Event::LFS_CONNECTION_CLOSED);

  return 0;
}

void
TAO_LF_CH_Event::set_state (int new_state)
{
  this->prev_state_ = this->state_;
  this->state_ = new_state;
}


int
TAO_LF_CH_Event::is_state_final (void)
{
  return this->state_ == TAO_LF_Event::LFS_CONNECTION_CLOSED;
}
// -*- C++ -*-

//=============================================================================
/**
 *  @file LF_CH_Event.h
 *
 *  $Id: LF_Event.h,v 1.6 2002/05/23 22:34:10 ossama Exp $
 *
 *  @author Balachandran Natarajan <bala@cs.wustl.edu>
 */
//=============================================================================
#ifndef TAO_LF_CH_EVENT_H
#define TAO_LF_CH_EVENT_H
#include "ace/pre.h"

#include "LF_Event.h"

#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */

/**
 * @class TAO_LF_CH_Event
 *
 * @brief Use the Leader/Follower loop to wait for one specific event
 * in the invocation path.
 *
 * Concrete event types and manipulation class which is used for
 * connection handleing purposes.
 */
class TAO_Export TAO_LF_CH_Event: public TAO_LF_Event
{
public:
  /// Constructor
  TAO_LF_CH_Event (void);

  /// Destructor
  virtual ~TAO_LF_CH_Event (void);

  /// Return 1 if the condition was satisfied successfully, 0 if it
  /// has not
  int successful (void) const;

  /// Return 1 if an error was detected while waiting for the
  /// event
  int error_detected (void) const;
  //@}

  /// Reset the state, irrespective of the previous states
  void reset_state (int new_state);


private:
  /// Validate and change the state
  /*
   * This concrete class uses the following states declared in the
   * class TAO_LF_Event to transition states
   *
   * LFS_IDLE              - The event is created, and is in initial
   *                         state.
   * LFS_CONNECTION_WAIT   - The event is waiting for connection
   *                         completion and it can transition to any of
   *                         the following states, all the states are
   *                         final.
   * LFS_SUCCESS           - The event, connection establishment, has
   *                         completed successfully.
   * LFS_TIMEOUT           - The event has timed out.
   * LFS_CONNECTION_CLOSED - The connection was closed since an error
   *                         occured while trying to establish
   *                         connection
   *
   */
  virtual void state_changed_i (int new_state);

  /// Check whether we have reached the final state..
  virtual int is_state_final (void);

  /// Set the state irrespective of anything.
  virtual void set_state (int new_state);

private:

  /// The previous state that the LF_CH_Event was in
  int prev_state_;
};

#if defined (__ACE_INLINE__)
# include "LF_Invocation_Event.inl"
#endif /* __ACE_INLINE__ */

#include "ace/post.h"
#endif  /* TAO_LF_CH_EVENT_H */
// -*- C++ -*-
#include "LF_Invocation_Event.h"


#if !defined (__ACE_INLINE__)
# include "tao/LF_Invocation_Event.inl"
#endif /* __ACE_INLINE__ */

ACE_RCSID(tao,
          LF_Invocation_Event,
          "$Id: LF_Event.cpp,v 1.4 2002/04/27 21:49:58 bala Exp $")

TAO_LF_Invocation_Event::TAO_LF_Invocation_Event (void)
  : TAO_LF_Event ()
{
}

TAO_LF_Invocation_Event::~TAO_LF_Invocation_Event (void)
{
}

void
TAO_LF_Invocation_Event::state_changed_i (int new_state)
{
  if (this->state_ == new_state)
    return;

  // Validate the state change
  if (this->state_ == TAO_LF_Event::LFS_IDLE)
    {
      // From the LFS_IDLE state we can only become active.
      if (new_state == TAO_LF_Event::LFS_ACTIVE
          || new_state == TAO_LF_Event::LFS_CONNECTION_CLOSED)
        this->state_ = new_state;
      return;
    }
  else if (this->state_ == TAO_LF_Event::LFS_ACTIVE)
    {
      // From LFS_ACTIVE we can only move to a few states
      if (new_state != TAO_LF_Event::LFS_IDLE)
        {
          if (new_state == TAO_LF_Event::LFS_CONNECTION_CLOSED)
            {
              this->state_ = TAO_LF_Event::LFS_FAILURE;
            }
          else
            {
              this->state_ = new_state;
            }
        }
      return;
    }
  else if (this->state_ == TAO_LF_Event::LFS_SUCCESS
           || this->state_ == TAO_LF_Event::LFS_CONNECTION_CLOSED)
    {
      // From the two states above we can go back to ACTIVE, as when a
      // request is restarted.
      if (new_state == TAO_LF_Event::LFS_ACTIVE)
        {
          this->state_ = new_state;
        }
      return;
    }
  else/* if (this->state_ == TAO_LF_Event::LFS_TIMEOUT || FAILURE */
    {
      // Other states are final..
    }

}

int
TAO_LF_Invocation_Event::successful (void) const
{
  return this->state_ == TAO_LF_Event::LFS_SUCCESS;
}

int
TAO_LF_Invocation_Event::error_detected (void) const
{
  return (this->state_ == TAO_LF_Event::LFS_FAILURE
          || this->state_ == TAO_LF_Event::LFS_TIMEOUT
          || this->state_ == TAO_LF_Event::LFS_CONNECTION_CLOSED);
}

int
TAO_LF_Invocation_Event::is_state_final (void)
{
  if (this->state_ == TAO_LF_Event::LFS_TIMEOUT ||
      this->state_ == TAO_LF_Event::LFS_FAILURE)
    return 1;

  return 0;
}
// -*- C++ -*-

//=============================================================================
/**
 *  @file LF_Invocation_Event.h
 *
 *  $Id: LF_Event.h,v 1.6 2002/05/23 22:34:10 ossama Exp $
 *
 *  @author Carlos O'Ryan <coryan@uci.edu>
 */
//=============================================================================

#ifndef TAO_LF_INVOCATION_EVENT_H
#define TAO_LF_INVOCATION_EVENT_H
#include "ace/pre.h"

#include "LF_Event.h"

#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */

/**
 * @class TAO_LF_Invocation_Event
 *
 * @brief Use the Leader/Follower loop to wait for one specific event
 * in the invocation path.
 *
 * Concrete event types and manipulation class through which the
 * invocation data path would flow. Typically state changes of
 * interest include whether a message has arrived, or timedout waiting
 * for a message or if the cionnection is closed waiting for a
 * message. Details of the states are documented within the class.
 *
 */
class TAO_Export TAO_LF_Invocation_Event: public TAO_LF_Event
{
public:
  /// Constructor
  TAO_LF_Invocation_Event (void);

  /// Destructor
  virtual ~TAO_LF_Invocation_Event (void);

  /// Return 1 if the condition was satisfied successfully, 0 if it
  /// has not
  int successful (void) const;

  /// Return 1 if an error was detected while waiting for the
  /// event
  int error_detected (void) const;
  //@}

protected:

  /// Validate and perform the state change
  /*
   * This concrete class uses the following states declared in the
   * class TAO_LF_Event
   *
   * LFS_IDLE    - The event is created, and is in initial state.
   * LFS_ACTIVE  - The event is active and it can transition to any of
   *               the following states, all the states are final.
   * LFS_SUCCESS - The event has completed successfully.
   * LFS_FAILURE - A failure has been detected while the event was
   *               active.
   * LFS_TIMEOUT - The event has timed out.
   * LFS_CONNECTION_CLOSED - The connection was closed when the state
   *                         was active.
   *
   */
  virtual void state_changed_i (int new_state);

private:
  /// Check whether we have reached the final state..
  int is_state_final (void);
};

#if defined (__ACE_INLINE__)
# include "LF_Invocation_Event.inl"
#endif /* __ACE_INLINE__ */

#include "ace/post.h"
#endif  /* TAO_LF_INVOCATION_EVENT_H */
// -*- C++ -*-
// $Id: LF_Event.inl,v 1.4 2001/11/02 13:10:40 bala Exp $
ACE_INLINE int
TAO_LF_Event::is_state_final (void)
{
  if (this->state_ == TAO_LF_Event::LFS_TIMEOUT ||
      this->state_ == TAO_LF_Event::LFS_FAILURE ||
      this->state_ == TAO_LF_Event::LFS_CONNECTION_CLOSED)
    return 1;

  return 0;
}