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// -*- C++ -*-
//=============================================================================
/**
* @file Client_Logging_Handler.h
*
* $Id$
*
* @author Doug Schmidt <schmidt@.cs.wustl.edu>
*/
//=============================================================================
#ifndef ACE_CLIENT_LOGGER_H
#define ACE_CLIENT_LOGGER_H
#include "ace/SPIPE_Stream.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/SOCK_Stream.h"
#include "ace/Svc_Handler.h"
#include "ace/svc_export.h"
#if defined (ACE_HAS_STREAM_PIPES)
#define LOGGING_STREAM ACE_SPIPE_STREAM
#define LOGGING_ACCEPTOR ACE_SPIPE_ACCEPTOR
#define LOGGING_ADDR ACE_SPIPE_Addr
#else
#define LOGGING_STREAM ACE_SOCK_STREAM
#define LOGGING_ACCEPTOR ACE_SOCK_ACCEPTOR
#define LOGGING_ADDR ACE_INET_Addr
#endif /* ACE_HAS_STREAM_PIPES */
#if defined ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION_EXPORT
template class ACE_Svc_Export ACE_Svc_Handler<LOGGING_STREAM, ACE_NULL_SYNCH>;
#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION_EXPORT */
/**
* @class ACE_Client_Logging_Handler
*
* @brief This client logging daemon is a mediator that receives logging
* records from local applications processes and forwards them to
* the server logging daemon running on another host.
*
* The default implementation uses an <ACE_SPIPE_Stream> to
* receive the logging message from the application and an
* <ACE_SOCK_Stream> to forward the logging message to the
* server. However, on platforms that don't support
* <ACE_SPIPEs> (e.g., Win32) we use sockets instead.
*/
class ACE_Svc_Export ACE_Client_Logging_Handler : public ACE_Svc_Handler<LOGGING_STREAM, ACE_NULL_SYNCH>
{
public:
// = Initialization and termination.
/// Default constructor. <handle> is where the output is sent.
ACE_Client_Logging_Handler (ACE_HANDLE handle = ACE_STDERR);
/// Activate this instance of the <ACE_Client_Logging_Handler>
/// (called by the <ACE_Client_Logging_Acceptor>).
virtual int open (void * = 0);
/// Return the handle of the <ACE_SPIPE_Stream>;
virtual ACE_HANDLE get_handle (void) const;
/// Called when object is removed from the <ACE_Reactor>.
virtual int close (u_long);
private:
/// Handle SIGPIPE.
virtual int handle_signal (int signum,
siginfo_t *,
ucontext_t *);
/// Receive logging records from applications.
virtual int handle_input (ACE_HANDLE);
/**
* Receive logging records from applications. This is necessary to
* handle madness with UNIX select, which can't deal with MSG_BAND
* data easily due to its overly simple interface... This just
* calls <handle_input>.
*/
virtual int handle_exception (ACE_HANDLE);
/// Called back when it's ok to send.
virtual int handle_output (ACE_HANDLE);
/// Send the <log_record> to the logging server.
int send (ACE_Log_Record &log_record);
/// This is either a SOCKET (if we're connected to a logging server)
/// or ACE_STDERR.
ACE_HANDLE logging_output_;
};
ACE_SVC_FACTORY_DECLARE (ACE_Client_Logging_Acceptor)
#endif /* ACE_CLIENT_LOGGER_H */
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