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// This may look like C, but it's really -*- C++ -*-
// $Id$
#ifndef TAO_CONNECT_H
# define TAO_CONNECT_H
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// Connect.h
//
// = AUTHOR
// Chris Cleeland
//
// ============================================================================
# include "ace/Reactor.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
# include "ace/Acceptor.h"
# include "ace/SOCK_Acceptor.h"
# include "ace/Synch.h"
# include "ace/Svc_Handler.h"
# include "tao/corbafwd.h"
// Forward Decls
class TAO_OA_Parameters;
class TAO_Transport;
class TAO_IIOP_Transport;
class TAO_IIOP_Client_Transport;
class TAO_IIOP_Server_Transport;
class TAO_ORB_Core;
typedef ACE_Svc_Handler<TAO_SOCK_STREAM, ACE_NULL_SYNCH>
TAO_SVC_HANDLER;
class TAO_IIOP_Handler_Base : public TAO_SVC_HANDLER
{
public:
TAO_IIOP_Handler_Base (ACE_Thread_Manager *t);
TAO_IIOP_Handler_Base (TAO_ORB_Core *orb_core);
virtual TAO_Transport *transport (void) = 0;
};
class TAO_Export TAO_Client_Connection_Handler : public TAO_IIOP_Handler_Base
{
// = TITLE
// <Svc_Handler> used on the client side and returned by the
// <TAO_CONNECTOR>.
public:
// = Intialization method.
TAO_Client_Connection_Handler (ACE_Thread_Manager *t = 0);
virtual ~TAO_Client_Connection_Handler (void);
// = <Connector> hook.
virtual int open (void *);
// Activation template method.
virtual int send_request (TAO_ORB_Core* orb_core,
TAO_OutputCDR &stream,
int is_twoway);
// Send the request in <stream>. If it is a twoway invocation, then
// this re-enters the reactor event loop so that incoming requests
// can continue to be serviced. This insures that a nested upcall,
// i.e., an invocation coming back from the remote during this
// invocation, will still be handled and deadlock averted.
// = Event Handler overloads
virtual int handle_input (ACE_HANDLE = ACE_INVALID_HANDLE);
// Called when a a response from a twoway invocation is available.
virtual int handle_close (ACE_HANDLE = ACE_INVALID_HANDLE,
ACE_Reactor_Mask = ACE_Event_Handler::NULL_MASK);
// Perform appropriate closing.
virtual int close (u_long flags = 0);
// Object termination hook.
virtual TAO_Transport *transport (void);
protected:
TAO_IIOP_Client_Transport *iiop_transport_;
// @@ New transport object reference.
// The handler is responsible for creating this object when
// it is instantiated. fredk
int check_unexpected_data (void);
// This method checks for unexpected data
int expecting_response_;
// State flag which, if non-zero, indicates that this handler is
// looking to get input. Otherwise, any input received is
// unexpected.
int input_available_;
// Flag indicating whether or not input is available. Only valid
// when <expecting_response_> is non-zero.
};
class TAO_Export TAO_ST_Client_Connection_Handler : public TAO_Client_Connection_Handler
{
public:
TAO_ST_Client_Connection_Handler (ACE_Thread_Manager *t = 0);
virtual ~TAO_ST_Client_Connection_Handler (void);
virtual int send_request (TAO_ORB_Core* orb_core,
TAO_OutputCDR &stream,
int is_twoway);
// Send the request in <stream>. If it is a twoway invocation, then
// this re-enters the reactor event loop so that incoming requests
// can continue to be serviced. This insures that a nested upcall,
// i.e., an invocation coming back from the remote during this
// invocation, will still be handled and deadlock averted.
virtual int handle_input (ACE_HANDLE = ACE_INVALID_HANDLE);
// Called when a a response from a twoway invocation is available.
protected:
};
class TAO_Export TAO_MT_Client_Connection_Handler : public TAO_Client_Connection_Handler
{
public:
TAO_MT_Client_Connection_Handler (ACE_Thread_Manager *t = 0);
virtual ~TAO_MT_Client_Connection_Handler (void);
virtual int send_request (TAO_ORB_Core* orb_core,
TAO_OutputCDR &stream,
int is_twoway);
// Send the request in <stream>. If it is a twoway invocation, then
// this re-enters the reactor event loop so that incoming requests
// can continue to be serviced. This insures that a nested upcall,
// i.e., an invocation coming back from the remote during this
// invocation, will still be handled and deadlock averted.
virtual int handle_input (ACE_HANDLE = ACE_INVALID_HANDLE);
// Called when a a response from a twoway invocation is available.
protected:
ACE_thread_t calling_thread_;
// the thread ID of the thread we were running in.
ACE_SYNCH_CONDITION* cond_response_available_;
// wait on reponse if the leader-follower model is active
};
// ****************************************************************
class TAO_ORB_Core;
class TAO_Export TAO_Server_Connection_Handler : public TAO_IIOP_Handler_Base
{
// = TITLE
// Handles requests on a single connection in a server.
public:
TAO_Server_Connection_Handler (ACE_Thread_Manager* t = 0);
TAO_Server_Connection_Handler (TAO_ORB_Core *orb_core);
// Constructor.
virtual int open (void *);
// Called by the <Strategy_Acceptor> when the handler is completely
// connected. Argument is unused.
// = Active object activation method.
virtual int activate (long flags = THR_NEW_LWP,
int n_threads = 1,
int force_active = 0,
long priority = ACE_DEFAULT_THREAD_PRIORITY,
int grp_id = -1,
ACE_Task_Base *task = 0,
ACE_hthread_t thread_handles[] = 0,
void *stack[] = 0,
size_t stack_size[] = 0,
ACE_thread_t thread_names[] = 0);
virtual int svc (void);
// Only used when the handler is turned into an active object by
// calling <activate>. This serves as the event loop in such cases.
// = Template Methods Called by <handle_input>
virtual int handle_message (TAO_InputCDR &msg,
TAO_OutputCDR &response,
CORBA::Boolean &response_required,
CORBA::ULong &request_id,
CORBA_Environment &TAO_IN_ENV = CORBA::default_environment ());
// Handle processing of the request residing in <msg>, setting
// <response_required> to zero if the request is for a oneway or
// non-zero if for a two-way and <response> to any necessary
// response (including errors). In case of errors, -1 is returned
// and additional information carried in <env>.
TAO_Transport *transport (void);
protected:
TAO_IIOP_Server_Transport *iiop_transport_;
// @@ New transport object reference.
virtual int handle_locate (TAO_InputCDR &msg,
TAO_OutputCDR &response,
CORBA::Boolean &response_required,
CORBA::ULong &request_id,
CORBA_Environment &TAO_IN_ENV = CORBA::default_environment ());
// Handle processing of the location request residing in <msg>,
// setting <response_required> to one if no errors are encountered.
// The LocateRequestReply is placed into <response>. In case of
// errors, -1 is returned and additional information carried in
// <TAO_IN_ENV>.
virtual void send_response (TAO_OutputCDR &response);
// Send <response> to the client on the other end.
void send_error (CORBA::ULong request_id,
CORBA::Exception *ex);
// Send <error> to the client on the other end, which
// means basically sending the exception.
// = Event Handler overloads
virtual int handle_input (ACE_HANDLE = ACE_INVALID_HANDLE);
// Reads a message from the <peer()>, dispatching and servicing it
// appropriately.
virtual int handle_close (ACE_HANDLE = ACE_INVALID_HANDLE,
ACE_Reactor_Mask = ACE_Event_Handler::NULL_MASK);
// Perform appropriate closing.
TAO_ORB_Core *orb_core_;
// Cache the ORB Core to minimize
};
#if defined (__ACE_INLINE__)
# include "tao/Connect.i"
#endif /* __ACE_INLINE__ */
#endif /* TAO_CONNECT_H */
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