IIOP_Connection_Handler.h

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// -*- C++ -*-

// ===================================================================
/**
 *  @file   IIOP_Connection_Handler.h
 *
 *  IIOP_Connection_Handler.h,v 1.33 2006/06/01 09:49:38 jwillemsen Exp
 *
 *  @author Originally by Chris Cleeland as IIOP_Connect.h
 *  @author Balachandran Natarajan <bala@cs.wustl.edu>
 */
// ===================================================================

#ifndef TAO_IIOP_CONNECTION_HANDLER_H
#define TAO_IIOP_CONNECTION_HANDLER_H

#include /**/ "ace/pre.h"

#include "tao/orbconf.h"

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

#if defined (TAO_HAS_IIOP) && (TAO_HAS_IIOP != 0)

#include "tao/Connection_Handler.h"
#include "tao/Basic_Types.h"

#include "ace/SOCK_Stream.h"
#include "ace/Svc_Handler.h"

TAO_BEGIN_VERSIONED_NAMESPACE_DECL

/// Service Handler for this transport
typedef ACE_Svc_Handler<ACE_SOCK_STREAM, ACE_NULL_SYNCH>
        TAO_IIOP_SVC_HANDLER;

#if defined ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION_EXPORT
template class TAO_Export ACE_Svc_Handler<ACE_SOCK_STREAM, ACE_NULL_SYNCH>;
#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION_EXPORT */

namespace IIOP
{
  class ListenPointList;
}

// Forward Decls
class TAO_Pluggable_Messaging;

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

/**
 * @class TAO_IIOP_Connection_Handler
 *
 * @brief  Handles requests on a single connection.
 *
 * The Connection handler which is common for the Acceptor and
 * the Connector
 */
class TAO_Export TAO_IIOP_Connection_Handler : public TAO_IIOP_SVC_HANDLER,
                                               public TAO_Connection_Handler
{

public:

  TAO_IIOP_Connection_Handler (ACE_Thread_Manager * = 0);

  /// Constructor.
  TAO_IIOP_Connection_Handler (TAO_ORB_Core *orb_core,
                               CORBA::Boolean flag);

  /// Destructor.
  ~TAO_IIOP_Connection_Handler (void);

  /// Called by the @c Strategy_Acceptor when the handler is completely
  /// connected.  Argument is unused.
  virtual int open (void *);

  /// Close called by the Acceptor or Connector when connection
  /// establishment fails.
  int close (u_long = 0);

  //@{
  /** @name Event Handler overloads
   */
  virtual int resume_handler (void);
  virtual int close_connection (void);
  virtual int handle_input (ACE_HANDLE);
  virtual int handle_output (ACE_HANDLE);
  virtual int handle_close (ACE_HANDLE, ACE_Reactor_Mask);
  virtual int handle_timeout (const ACE_Time_Value &current_time,
                              const void *act = 0);
  //@}

  /// Add ourselves to Cache.
  int add_transport_to_cache (void);

  /// Process the @a listen_list
  int process_listen_point_list (IIOP::ListenPointList &listen_list);

  /// Check if network priority needs to be enabled
  int enable_network_priority (void);

  /// Set Diff-Serv codepoint on outgoing packets.
  int set_dscp_codepoint (CORBA::Boolean set_network_priority);

  virtual int open_handler (void *);

  /// This is used during a canceled connection attempt. Force the
  /// SO_LINGER timeout to 0 so that when the peer is closed, it won't
  /// hang around.
  void abort (void);

protected:

  /// Constructor that could be used by the derived classes.
  /**
   * Sometimes new pluggable protocols which have similarities with
   * IIOP may be tempted to this class for their use. Classical
   * example being that of IIOP_SSL_Connection_Handler. This
   * constructor just initializes its base class and sets all of its
   * contents to the default value, if any
   */
  TAO_IIOP_Connection_Handler (TAO_ORB_Core *orb_core);

  //@{
  /**
   * @name TAO_Connection Handler overloads
   */
  virtual int release_os_resources (void);
  //@}

private:

  /// Stores the type of service value.
  int dscp_codepoint_;
};

TAO_END_VERSIONED_NAMESPACE_DECL

#endif /* TAO_HAS_IIOP && TAO_HAS_IIOP != 0 */

#include /**/ "ace/post.h"
#endif /* TAO_IIOP_CONNECTION_HANDLER_H */

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