Handles requests on a single connection. More...

#include <UIOP_Connection_Handler.h>

Inheritance diagram for TAO_UIOP_Connection_Handler:

Collaboration diagram for TAO_UIOP_Connection_Handler:

Public Member Functions
	TAO_UIOP_Connection_Handler (ACE_Thread_Manager *t=0)
	TAO_UIOP_Connection_Handler (TAO_ORB_Core *orb_core)
	Constructor.
	~TAO_UIOP_Connection_Handler (void)
	Destructor.
int	close (u_long=0)
int	add_transport_to_cache (void)
	Add ourselves to Cache.


virtual int	open_handler (void *)
Event Handler overloads

virtual int	open (void *)
virtual int	resume_handler (void)
virtual int	close_connection (void)
	Close the underlying connection.
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)
Protected Member Functions
TAO_Connection Handler overloads

virtual int	release_os_resources (void)
	Release the OS resources related to this handler.
virtual int	handle_write_ready (const ACE_Time_Value *timeout)

Detailed Description

Handles requests on a single connection.

The Connection handler which is common for the Acceptor and the Connector

Definition at line 45 of file UIOP_Connection_Handler.h.

Constructor & Destructor Documentation

TAO_UIOP_Connection_Handler::TAO_UIOP_Connection_Handler ( ACE_Thread_Manager * t = 0 )

Definition at line 27 of file UIOP_Connection_Handler.cpp.

  : TAO_UIOP_SVC_HANDLER (t, 0 , 0),
    TAO_Connection_Handler (0)
{
  // This constructor should *never* get called, it is just here to
  // make the compiler happy: the default implementation of the
  // Creation_Strategy requires a constructor with that signature, we
  // don't use that implementation, but some (most?) compilers
  // instantiate it anyway.
  ACE_ASSERT (0);
}

TAO_UIOP_Connection_Handler::TAO_UIOP_Connection_Handler ( TAO_ORB_Core * orb_core )

Constructor.

Definition at line 40 of file UIOP_Connection_Handler.cpp.

  : TAO_UIOP_SVC_HANDLER (orb_core->thr_mgr (), 0, 0),
    TAO_Connection_Handler (orb_core)
{
  TAO_UIOP_Transport* specific_transport = 0;
  ACE_NEW (specific_transport,
           TAO_UIOP_Transport (this, orb_core));

  // store this pointer (indirectly increment ref count)
  this->transport (specific_transport);
}

TAO_UIOP_Connection_Handler::~TAO_UIOP_Connection_Handler ( void )

Destructor.

Definition at line 53 of file UIOP_Connection_Handler.cpp.

{
  delete this->transport ();
  int const result =
    this->release_os_resources ();

  if (result == -1 && TAO_debug_level)
    {
      ACE_ERROR ((LM_ERROR,
                  ACE_TEXT("TAO (%P|%t) - UIOP_Connection_Handler::")
                  ACE_TEXT("~UIOP_Connection_Handler, ")
                  ACE_TEXT("release_os_resources() failed %m\n")));
    }
}

Member Function Documentation

int TAO_UIOP_Connection_Handler::add_transport_to_cache ( void )

Add ourselves to Cache.

Definition at line 220 of file UIOP_Connection_Handler.cpp.

{
  ACE_UNIX_Addr addr;

  // Get the peername.
  if (this->peer ().get_remote_addr (addr) == -1)
    return -1;

  // Construct an  UIOP_Endpoint object
  TAO_UIOP_Endpoint endpoint (addr);

  // Construct a property object
  TAO_Base_Transport_Property prop (&endpoint);

  TAO::Transport_Cache_Manager &cache =
    this->orb_core ()->lane_resources ().transport_cache ();

  // Add the handler to Cache
  return cache.cache_transport (&prop, this->transport ());
}

int TAO_UIOP_Connection_Handler::close ( u_long flags = 0 )

Close called by the Acceptor or Connector when connection establishment fails.

Definition at line 208 of file UIOP_Connection_Handler.cpp.

{
  return this->close_handler (flags);
}

int TAO_UIOP_Connection_Handler::close_connection ( void ) [virtual]

Close the underlying connection.

Used by the ORB to actively close connections that are idle, stale or somehow are determined to be broken before the Reactor does.

Returns:: Return 0 if the connection was already closed, non-zero otherwise.

Implements TAO_Connection_Handler.

Definition at line 152 of file UIOP_Connection_Handler.cpp.

{
  return this->close_connection_eh (this);
}

int TAO_UIOP_Connection_Handler::handle_close	(	ACE_HANDLE	,
		ACE_Reactor_Mask
	)			`[virtual]`

Definition at line 201 of file UIOP_Connection_Handler.cpp.

{
  ACE_ASSERT (0);
  return 0;
}

int TAO_UIOP_Connection_Handler::handle_input ( ACE_HANDLE fd ) [virtual]

The event handler calls, here so that other objects who hold a reference to this object can call the event handler methods.

Implements TAO_Connection_Handler.

Definition at line 158 of file UIOP_Connection_Handler.cpp.

{
  return this->handle_input_eh (h, this);
}

int TAO_UIOP_Connection_Handler::handle_output ( ACE_HANDLE handle ) [virtual]

Definition at line 164 of file UIOP_Connection_Handler.cpp.

{
  int const result = this->handle_output_eh (handle, this);

  if (result == -1)
    {
      this->close_connection ();
      return 0;
    }

  return result;
}

int TAO_UIOP_Connection_Handler::handle_timeout	(	const ACE_Time_Value &	current_time,
		const void *	act = `0`
	)			`[virtual]`

Definition at line 178 of file UIOP_Connection_Handler.cpp.

{
  // Using this to ensure this instance will be deleted (if necessary)
  // only after reset_state(). Without this, when this refcount==1 -
  // the call to close() will cause a call to remove_reference() which
  // will delete this. At that point this->reset_state() is in no
  // man's territory and that causes SEGV on some platforms (Windows!)

  TAO_Auto_Reference<TAO_UIOP_Connection_Handler> safeguard (*this);

  // NOTE: Perhaps not the best solution, as it feels like the upper
  // layers should be responsible for this?

  // We don't use this upcall for I/O.  This is only used by the
  // Connector to indicate that the connection timedout.  Therefore,
  // we should call close().
  int const ret = this->close ();
  this->reset_state (TAO_LF_Event::LFS_TIMEOUT);
  return ret;
}

int TAO_UIOP_Connection_Handler::handle_write_ready ( const ACE_Time_Value * timeout ) [protected, virtual]

Derived classes should implement this for proper support with the Blocking Flushing Strategy.

Reimplemented from TAO_Connection_Handler.

Definition at line 242 of file UIOP_Connection_Handler.cpp.

{
  return ACE::handle_write_ready (this->peer ().get_handle (), t);
}

int TAO_UIOP_Connection_Handler::open ( void * ) [virtual]

Definition at line 75 of file UIOP_Connection_Handler.cpp.

{
  if (this->shared_open() == -1)
    return -1;

  TAO_UIOP_Protocol_Properties protocol_properties;

  // Initialize values from ORB params.
  protocol_properties.send_buffer_size_ =
    this->orb_core ()->orb_params ()->sock_sndbuf_size ();
  protocol_properties.recv_buffer_size_ =
    this->orb_core ()->orb_params ()->sock_rcvbuf_size ();

  TAO_Protocols_Hooks *tph = this->orb_core ()->get_protocols_hooks ();

  if (tph != 0)
    {
      try
        {
          if (this->transport ()->opened_as () == TAO::TAO_CLIENT_ROLE)
            {
              tph->client_protocol_properties_at_orb_level (protocol_properties);
            }
          else
            {
              tph->server_protocol_properties_at_orb_level (protocol_properties);
            }
        }
      catch (const ::CORBA::Exception&)
        {
          return -1;
        }
    }

  if (this->set_socket_option (this->peer (),
                               protocol_properties.send_buffer_size_,
                               protocol_properties.recv_buffer_size_) == -1)
    return -1;

  if (this->transport ()->wait_strategy ()->non_blocking ())
    {
      if (this->peer ().enable (ACE_NONBLOCK) == -1)
        return -1;
    }

  // Called by the <Strategy_Acceptor> when the handler is completely
  // connected.
  ACE_UNIX_Addr addr;

  if (this->peer ().get_remote_addr (addr) == -1)
    return -1;

  if (TAO_debug_level > 0)
    ACE_DEBUG ((LM_DEBUG,
                ACE_TEXT ("TAO (%P|%t) UIOP connection to server ")
                ACE_TEXT ("<%C> on %d\n"),
                addr.get_path_name (), this->peer ().get_handle ()));

  // Set that the transport is now connected, if fails we return -1
  // Use C-style cast b/c otherwise we get warnings on lots of
  // compilers
  if (!this->transport ()->post_open ((size_t) this->get_handle ()))
    return -1;

  this->state_changed (TAO_LF_Event::LFS_SUCCESS,
                       this->orb_core ()->leader_follower ());

  return 0;
}

int TAO_UIOP_Connection_Handler::open_handler ( void * v ) [virtual]

Connection_Handler overloads

Implements TAO_Connection_Handler.

Definition at line 69 of file UIOP_Connection_Handler.cpp.

{
  return this->open (v);
}

int TAO_UIOP_Connection_Handler::release_os_resources ( void ) [protected, virtual]

Release the OS resources related to this handler.

Reimplemented from TAO_Connection_Handler.

Definition at line 214 of file UIOP_Connection_Handler.cpp.

{
  return this->peer().close ();
}

int TAO_UIOP_Connection_Handler::resume_handler ( void ) [virtual]

Definition at line 146 of file UIOP_Connection_Handler.cpp.

{
  return ACE_Event_Handler::ACE_APPLICATION_RESUMES_HANDLER;
}

The documentation for this class was generated from the following files:

TAO_UIOP_Connection_Handler Class Reference

Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation