TAO_SHMIOP_Connection_Handler Class Reference

Handles requests on a single connection. More...

#include <SHMIOP_Connection_Handler.h>

Inheritance diagram for TAO_SHMIOP_Connection_Handler:

[legend]Collaboration diagram for TAO_SHMIOP_Connection_Handler:

[legend]List of all members.

Public Member Functions
	TAO_SHMIOP_Connection_Handler (ACE_Thread_Manager *t=0)
	Constructor.
	TAO_SHMIOP_Connection_Handler (TAO_ORB_Core *orb_core)
	Constructor.
	~TAO_SHMIOP_Connection_Handler (void)
	Destructor.
virtual int	open (void *)
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	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)
Protected Member Functions
TAO_Connection Handler overloads
virtual int	release_os_resources (void)
Private Attributes
int	resume_flag_

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Detailed Description

Handles requests on a single connection.

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

Definition at line 44 of file SHMIOP_Connection_Handler.h.

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Constructor & Destructor Documentation

TAO_BEGIN_VERSIONED_NAMESPACE_DECL TAO_SHMIOP_Connection_Handler::TAO_SHMIOP_Connection_Handler

(

ACE_Thread_Manager *

t = 0

)

Constructor.

Definition at line 29 of file SHMIOP_Connection_Handler.cpp.

References ACE_ASSERT.

  : TAO_SHMIOP_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_SHMIOP_Connection_Handler::TAO_SHMIOP_Connection_Handler

(

TAO_ORB_Core *

orb_core

)

Constructor.

Definition at line 42 of file SHMIOP_Connection_Handler.cpp.

References ACE_NEW, TAO_Connection_Handler::orb_core(), and TAO_Connection_Handler::transport().

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

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

TAO_SHMIOP_Connection_Handler::~TAO_SHMIOP_Connection_Handler

(

void

)

Destructor.

Definition at line 55 of file SHMIOP_Connection_Handler.cpp.

References ACE_ERROR, ACE_TEXT, LM_ERROR, release_os_resources(), TAO_debug_level, and TAO_Connection_Handler::transport().

{
  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) - SHMIOP_Connection_Handler::")
                  ACE_TEXT("~SHMIOP_Connection_Handler, ")
                  ACE_TEXT("release_os_resources() failed %m\n")));
    }

}

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Member Function Documentation

int TAO_SHMIOP_Connection_Handler::add_transport_to_cache

(

void

)

Add ourselves to Cache.

Definition at line 246 of file SHMIOP_Connection_Handler.cpp.

References TAO_ORB_Core::lane_resources(), TAO_Connection_Handler::orb_core(), and TAO_Thread_Lane_Resources::transport_cache().

{
  ACE_INET_Addr addr;

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

  // Construct an  SHMIOP_Endpoint object
  TAO_SHMIOP_Endpoint endpoint (
      addr,
      this->orb_core()->orb_params()->use_dotted_decimal_addresses ());

  // 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_idle_transport (&prop,
                                     this->transport ());
}

int TAO_SHMIOP_Connection_Handler::close

(

u_long

= 0

)

[virtual]

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

Reimplemented from ACE_Svc_Handler< ACE_MEM_STREAM, ACE_NULL_SYNCH >.

Definition at line 234 of file SHMIOP_Connection_Handler.cpp.

References TAO_Connection_Handler::close_handler().

Referenced by handle_timeout(), and TAO_SHMIOP_Connector::make_connection().

{
  return this->close_handler ();
}

int TAO_SHMIOP_Connection_Handler::close_connection

(

void

)

[virtual]

Implements TAO_Connection_Handler.

Definition at line 176 of file SHMIOP_Connection_Handler.cpp.

References TAO_Connection_Handler::close_connection_eh().

Referenced by handle_output().

{
  return this->close_connection_eh (this);
}

int TAO_SHMIOP_Connection_Handler::handle_close	(	ACE_HANDLE	,
		ACE_Reactor_Mask
	)			[virtual]

Reimplemented from ACE_Svc_Handler< ACE_MEM_STREAM, ACE_NULL_SYNCH >.

Definition at line 226 of file SHMIOP_Connection_Handler.cpp.

References ACE_ASSERT.

{
  ACE_ASSERT (0);
  return 0;
}

int TAO_SHMIOP_Connection_Handler::handle_input

(

ACE_HANDLE

)

[virtual]

Implements TAO_Connection_Handler.

Definition at line 182 of file SHMIOP_Connection_Handler.cpp.

References TAO_Connection_Handler::handle_input_eh().

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

int TAO_SHMIOP_Connection_Handler::handle_output

(

ACE_HANDLE

)

[virtual]

Reimplemented from ACE_Event_Handler.

Definition at line 188 of file SHMIOP_Connection_Handler.cpp.

References close_connection(), and TAO_Connection_Handler::handle_output_eh().

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

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

  return result;
}

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

Reimplemented from ACE_Svc_Handler< ACE_MEM_STREAM, ACE_NULL_SYNCH >.

Definition at line 203 of file SHMIOP_Connection_Handler.cpp.

References close(), TAO_LF_Event::LFS_TIMEOUT, and TAO_LF_Event::reset_state().

{
  // 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_SHMIOP_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 ret = this->close ();
  this->reset_state (TAO_LF_Event::LFS_TIMEOUT);
  return ret;
}

int TAO_SHMIOP_Connection_Handler::open

(

void *

)

[virtual]

Called by the <Strategy_Acceptor> when the handler is completely connected. Argument is unused.

Reimplemented from ACE_Svc_Handler< ACE_MEM_STREAM, ACE_NULL_SYNCH >.

Definition at line 78 of file SHMIOP_Connection_Handler.cpp.

References ACE_DEBUG, ACE_IPPROTO_TCP, ACE_NONBLOCK, ACE_TEXT, ACE_INET_Addr::addr_to_string(), TAO_Protocols_Hooks::client_protocol_properties_at_orb_level(), TAO_ORB_Core::get_protocols_hooks(), TAO_LF_Event::LFS_SUCCESS, LM_DEBUG, MAXHOSTNAMELEN, TAO_SHMIOP_Protocol_Properties::no_delay_, TAO_ORB_Parameters::nodelay(), TAO_Connection_Handler::orb_core(), TAO_ORB_Core::orb_params(), TAO_SHMIOP_Protocol_Properties::recv_buffer_size_, TAO_SHMIOP_Protocol_Properties::send_buffer_size_, TAO_Protocols_Hooks::server_protocol_properties_at_orb_level(), TAO_ORB_Parameters::sock_rcvbuf_size(), TAO_ORB_Parameters::sock_sndbuf_size(), TAO_LF_Event::state_changed(), TAO::TAO_CLIENT_ROLE, TAO_debug_level, and TCP_NODELAY.

Referenced by open_handler().

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

  TAO_SHMIOP_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 ();
  protocol_properties.no_delay_ =
    this->orb_core ()->orb_params ()->nodelay ();

  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 !defined (ACE_LACKS_TCP_NODELAY)
  if (this->peer ().set_option (ACE_IPPROTO_TCP,
                                TCP_NODELAY,
                                (void *) &protocol_properties.no_delay_,
                                sizeof (protocol_properties.no_delay_)) == -1)
    return -1;

#endif /* ! ACE_LACKS_TCP_NODELAY */

  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_INET_Addr addr;

  ACE_TCHAR local_as_string[MAXHOSTNAMELEN + 16];

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

  // Verify that we can resolve the peer hostname.
  else if (addr.addr_to_string (local_as_string, sizeof (local_as_string)) == -1)
    return -1;

  if (TAO_debug_level > 0)
    {
      ACE_DEBUG ((LM_DEBUG,
                  ACE_TEXT ("TAO (%P|%t) - SHMIOP connection from client")
                  ACE_TEXT ("<%s> on %d\n"),
                  local_as_string, 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;

  // Not needed, anyway
  this->state_changed (TAO_LF_Event::LFS_SUCCESS,
                       this->orb_core ()->leader_follower ());

  return 0;
}

int TAO_SHMIOP_Connection_Handler::open_handler

(

void *

)

[virtual]

Connection_Handler overloads

Implements TAO_Connection_Handler.

Definition at line 72 of file SHMIOP_Connection_Handler.cpp.

References open().

{
  return this->open (v);
}

int TAO_SHMIOP_Connection_Handler::release_os_resources

(

void

)

[protected, virtual]

Reimplemented from TAO_Connection_Handler.

Definition at line 240 of file SHMIOP_Connection_Handler.cpp.

References ACE_Svc_Handler< ACE_MEM_STREAM, ACE_NULL_SYNCH >::peer().

Referenced by ~TAO_SHMIOP_Connection_Handler().

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

int TAO_SHMIOP_Connection_Handler::resume_handler

(

void

)

[virtual]

Reimplemented from ACE_Event_Handler.

Definition at line 170 of file SHMIOP_Connection_Handler.cpp.

References ACE_Event_Handler::ACE_APPLICATION_RESUMES_HANDLER.

{
  return ACE_Event_Handler::ACE_APPLICATION_RESUMES_HANDLER;
}

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Member Data Documentation

int TAO_SHMIOP_Connection_Handler::resume_flag_ [private]

Flag that we will be passing to the event handler to indicate whether the handle will be resumed by the method or not.

Definition at line 101 of file SHMIOP_Connection_Handler.h.

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

• SHMIOP_Connection_Handler.h
• SHMIOP_Connection_Handler.cpp

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