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// -*- C++ -*-
//=============================================================================
/**
* @file Transport_Acceptor.h
*
* Interface for the Acceptor component of the TAO pluggable protocol
* framework.
*
* @author Fred Kuhns <fredk@cs.wustl.edu>
*/
//=============================================================================
#ifndef TAO_ACCEPTOR_H
#define TAO_ACCEPTOR_H
#include /**/ "ace/pre.h"
#include /**/ "tao/TAO_Export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Acceptor.h"
#include "tao/Basic_Types.h"
// Forward declarations.
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
class ACE_Addr;
class ACE_Reactor;
ACE_END_VERSIONED_NAMESPACE_DECL
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
class TAO_ORB_Core;
class TAO_MProfile;
class TAO_Endpoint;
class TAO_Transport;
namespace IOP
{
struct TaggedProfile;
}
namespace TAO
{
class ObjectKey;
}
//@@ TAO_ACCEPTOR_SPL_INCLUDE_FORWARD_DECL_ADD_HOOK
// ****************************************************************
/// The TAO-specific OMG assigned value for the TAG_ORB_TYPE tagged
/// component.
/**
* This number was assigned by the OMG. Do *NOT* change. The ASCII
* representation is "TA\x00". If necessary, we can request more ORB
* types later.
*/
const CORBA::ULong TAO_ORB_TYPE = 0x54414f00U;
// ****************************************************************
/**
* @class TAO_Acceptor
*
* @brief Abstract Acceptor class used for pluggable transports.
*
* Base class for the Acceptor bridge class.
*
* @todo Need to rename the class as TAO_Transport_Acceptor.
*/
class TAO_Export TAO_Acceptor
{
public:
TAO_Acceptor (CORBA::ULong tag);
/// Destructor
virtual ~TAO_Acceptor (void);
/// The tag, each concrete class will have a specific tag value.
CORBA::ULong tag (void) const;
/// Set the amount of time to delay accepting new connections in the
/// event that we encounter an error that may be transient.
void set_error_retry_delay (time_t delay);
/// Method to initialize acceptor for address.
virtual int open (TAO_ORB_Core *orb_core,
ACE_Reactor *reactor,
int version_major,
int version_minor,
const char *address,
const char *options = 0) = 0;
/**
* Open an acceptor with the given protocol version on a default
* endpoint
*/
virtual int open_default (TAO_ORB_Core *,
ACE_Reactor *reactor,
int version_major,
int version_minor,
const char *options = 0) = 0;
/// Closes the acceptor
virtual int close (void) = 0;
/**
* Create the corresponding profile for this endpoint.
* If share_profile is set to true, the pluggable protocol
* implementation should try to add the endpoint to a profile
* in the mprofile that is of the same type. Currently, this
* is used when RT CORBA is enabled.
*/
virtual int create_profile (const TAO::ObjectKey &object_key,
TAO_MProfile &mprofile,
CORBA::Short priority) = 0;
/// Return 1 if the @a endpoint has the same address as the acceptor.
virtual int is_collocated (const TAO_Endpoint *endpoint) = 0;
/**
* Returns the number of endpoints this acceptor is listening on. This
* is used for determining how many profiles will be generated
* for this acceptor.
*/
virtual CORBA::ULong endpoint_count (void) = 0;
/**
* This method fetches the @a key from the @a profile. Protocols that
* are pluggable can send data that are specific in the
* @c profile_data field encapsulated as a octet stream. This method
* allows those protocols to get the object key from the
* encapsulation.
*/
virtual int object_key (IOP::TaggedProfile &profile,
TAO::ObjectKey &key) = 0;
/// This method is not directly associated with the method of the same
/// name on the ACE_Acceptor template class. However, it is called by
/// the TAO_Strategy_Acceptor method of the same name.
int handle_accept_error (ACE_Event_Handler* base_acceptor);
/// Perform the handle_timeout functionality to put this acceptor back
/// into the reactor to try accepting again.
int handle_expiration (ACE_Event_Handler* base_acceptor);
/*
* Hook to add public methods from derived acceptor classes onto
* this class.
*/
//@@ TAO_ACCEPTOR_SPL_PUBLIC_METHODS_ADD_HOOK
private:
/// IOP protocol tag.
CORBA::ULong const tag_;
time_t error_retry_delay_;
/*
* Hook to add data members from concrete acceptor implementations onto
* the base class.
*/
//@@ TAO_ACCEPTOR_SPL_DATA_MEMBERS_ADD_HOOK
};
/// This is a drop-in replacement class for the ACE_Strategy_Acceptor.
/// It provides all of the same functionality and the additional
/// functionality of handling accept() errors with some sort of
/// configured action. All of the actual code is in the TAO_Acceptor
/// to avoid multiply-instantiated code that would be, in effect,
/// identical.
///
/// It is not declared nested within TAO_Acceptor as I originally wanted
/// because it caused an internal compiler error for the Tornado 2.2.1
/// compiler.
template <class SVC_HANDLER, ACE_PEER_ACCEPTOR_1>
class TAO_Strategy_Acceptor:
public ACE_Strategy_Acceptor<SVC_HANDLER, ACE_PEER_ACCEPTOR_2>
{
public:
TAO_Strategy_Acceptor (TAO_Acceptor* acceptor)
: acceptor_ (acceptor)
{
}
virtual int handle_accept_error (void)
{
return this->acceptor_->handle_accept_error (this);
}
virtual int handle_timeout (const ACE_Time_Value&, const void*)
{
return this->acceptor_->handle_expiration (this);
}
private:
TAO_Acceptor* acceptor_;
};
//@@ TAO_ACCEPTOR_SPL_EXTERN_ADD_HOOK
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
# include "tao/Transport_Acceptor.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_ACCEPTOR_H */
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