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// This may look like C, but it's really -*- C++ -*-
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// IIOP_Transport.h
//
// = DESCRIPTION
// IIOP Transport specific processing
//
// = AUTHOR
// Fred Kuhns <fredk@cs.wustl.edu>
//
// ============================================================================
#ifndef TAO_IIOP_TRANSPORT_H
#define TAO_IIOP_TRANSPORT_H
#include "tao/Pluggable.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/GIOP.h"
// Forward decls.
class TAO_IIOP_Handler_Base;
class TAO_IIOP_Client_Connection_Handler;
class TAO_IIOP_Server_Connection_Handler;
class TAO_ORB_Core;
class TAO_Export TAO_IIOP_Transport : public TAO_Transport
{
// = TITLE
// This class acts as a bridge class to the transport specific
// connection handler (handler_).
//
// = DESCRIPTION
// Specialization of the base TAO_Transport class to handle the IIOP
// protocol. This class in turn will be further specialized for
// the client and server side.
public:
TAO_IIOP_Transport (TAO_IIOP_Handler_Base *handler,
TAO_ORB_Core *orb_core);
// Base object's creator method.
~TAO_IIOP_Transport (void);
// Default destructor.
CORBA::ULong tag (void);
// Returns the specific IOP instance, in this case IIOP.
void close_connection (void);
// Call the corresponding connection handlers close method.
int idle (void);
// Idles the corresponding connection handler.
TAO_IIOP_Handler_Base *&handler (void);
// Return a reference to the corresponding connection handler.
ACE_HANDLE handle (void);
// Return the underlying connection handle.
ssize_t send (const ACE_Message_Block *mblk,
ACE_Time_Value *s = 0);
// Write the contents of the Message_Block to the connection.
ssize_t send (const u_char *buf,
size_t len,
ACE_Time_Value *s = 0);
// Write the contents of the buffer of length len to the connection.
ssize_t send (const iovec *iov,
int iovcnt,
ACE_Time_Value *s = 0);
// Write the contents of iovcnt iovec's to the connection.
ssize_t recv (char *buf,
size_t len,
ACE_Time_Value *s = 0);
// Read len bytes from into buf.
ssize_t recv (char *buf,
size_t len,
int flags,
ACE_Time_Value *s = 0);
// Read len bytes from into buf using flags.
ssize_t recv (iovec *iov,
int iovcnt,
ACE_Time_Value *s = 0);
// Read received data into the iovec buffers.
virtual int send_request (TAO_ORB_Core *orb_core ,
TAO_OutputCDR &stream,
int twoway,
ACE_Time_Value *max_wait_time);
// Default action to be taken for send request.
protected:
TAO_IIOP_Handler_Base *handler_;
// the connection service handler used for accessing lower layer
// communication protocols.
};
class TAO_Export TAO_IIOP_Client_Transport : public TAO_IIOP_Transport
{
// = TITLE
// The Transport class used for Client side communication with a
// server.
//
// = DESCRIPTION
// Specialization of the TAO_IIOP_Transport class for client
// side. Methods related to sending one and two way requests
// lives here.
public:
TAO_IIOP_Client_Transport (TAO_IIOP_Client_Connection_Handler *handler,
TAO_ORB_Core *orb_core);
// Constructor. Note, TAO_IIOP_Handler_Base is the base class for
// both TAO_IIOP_Client_Connection_Handler and
// TAO_IIOP_Server_Connection_Handler.
~TAO_IIOP_Client_Transport (void);
// destructor
TAO_IIOP_Client_Connection_Handler *client_handler (void);
// return a pointer to the client's connection handler.
virtual void start_request (TAO_ORB_Core *orb_core,
const TAO_Profile *profile,
const char* opname,
CORBA::ULong request_id,
CORBA::Boolean is_twoway,
TAO_OutputCDR &output,
CORBA::Environment &ACE_TRY_ENV = TAO_default_environment ())
ACE_THROW_SPEC ((CORBA::SystemException));
// Fill into <output> the right headers to make a request.
virtual void start_locate (TAO_ORB_Core *orb_core,
const TAO_Profile *profile,
CORBA::ULong request_id,
TAO_OutputCDR &output,
CORBA::Environment &ACE_TRY_ENV = TAO_default_environment ())
ACE_THROW_SPEC ((CORBA::SystemException));
// Fill into <output> the right headers to make a locate request.
int send_request (TAO_ORB_Core *orb_core,
TAO_OutputCDR &stream,
int twoway,
ACE_Time_Value *max_wait_time);
// This is a bridge method for the connection handlers
// <send_request> method. The connection handler is responsible for
// concurrency strategies, typically using the leader-follower
// pattern.
int handle_client_input (int block = 0,
ACE_Time_Value *max_time_value = 0);
// Read and handle the reply. Returns 0 when there is Short Read on
// the connection. Returns 1 when the full reply is read and
// handled. If <block> is 1, then reply is read in a blocking
// manner.
virtual int register_handler (void);
// Register the handler with the reactor. This will be called by the
// Wait Strategy if Reactor is used for that strategy.
protected:
int check_unexpected_data (void);
// This method checks for unexpected data.
private:
TAO_IIOP_Client_Connection_Handler *client_handler_;
// pointer to the corresponding client side connection handler.
};
// ****************************************************************
class TAO_Export TAO_IIOP_Server_Transport : public TAO_IIOP_Transport
{
// = TITLE
// The Transport class used for server communication with a
// connected client.
//
// = DESCRIPTION
// Specialization of the TAO_IIOP_Transport class for the server side.
// methods for reading messages (requests) and sending replies live
// here.
public:
TAO_IIOP_Server_Transport (TAO_IIOP_Server_Connection_Handler *handler,
TAO_ORB_Core *orb_core);
// Default creator method.
~TAO_IIOP_Server_Transport (void);
// Default destructor
TAO_IIOP_Server_Connection_Handler *server_handler_;
// Pointer to the corresponding connection handler.
TAO_GIOP_Message_State message_state_;
// This keep the state of the current message, to enable
// non-blocking reads, fragment reassembly, etc.
};
#endif /* TAO_IIOP_TRANSPORT_H */
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