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// -*- C++ -*-
// Copyright (C) 2013-2017, Vaclav Zeman. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modifica-
// tion, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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#ifndef LOG4CPLUS_HELPERS_CONNECTORTHREAD_H
#define LOG4CPLUS_HELPERS_CONNECTORTHREAD_H
#include <log4cplus/config.hxx>
#if defined (LOG4CPLUS_HAVE_PRAGMA_ONCE)
#pragma once
#endif
#include <log4cplus/thread/syncprims.h>
#include <log4cplus/thread/threads.h>
#include <log4cplus/helpers/socket.h>
#if ! defined (LOG4CPLUS_SINGLE_THREADED)
namespace log4cplus { namespace helpers {
class LOG4CPLUS_EXPORT ConnectorThread;
//! Interface implemented by users of ConnectorThread.
class LOG4CPLUS_EXPORT IConnectorThreadClient
{
protected:
virtual ~IConnectorThreadClient ();
//! \return Mutex for synchronization between ConnectorThread and
//! its client object. This is usually SharedObject::access_mutex.
virtual thread::Mutex const & ctcGetAccessMutex () const = 0;
//! \return Socket variable in ConnectorThread client to maintain.
virtual helpers::Socket & ctcGetSocket () = 0;
//! \return ConnectorThread client's function returning connected
//! socket.
virtual helpers::Socket ctcConnect () = 0;
//! Sets connected flag to true in ConnectorThread's client.
virtual void ctcSetConnected () = 0;
friend class LOG4CPLUS_EXPORT ConnectorThread;
};
//! This class is used by SocketAppender and (remote) SysLogAppender
//! to provide asynchronous re-connection.
class LOG4CPLUS_EXPORT ConnectorThread
: public thread::AbstractThread
{
public:
//! \param client reference to ConnectorThread's client object
ConnectorThread (IConnectorThreadClient & client);
virtual ~ConnectorThread ();
virtual void run();
//! Call this function to terminate ConnectorThread. The function
//! sets `exit_flag` and then triggers `trigger_ev` to wake up the
//! ConnectorThread.
void terminate ();
//! This function triggers (`trigger_ev`) connection check and
//! attempt to re-connect a broken connection, when necessary.
void trigger ();
protected:
//! reference to ConnectorThread's client
IConnectorThreadClient & ctc;
//! This event is the re-connection trigger.
thread::ManualResetEvent trigger_ev;
//! When this variable set to true when ConnectorThread is signaled to
bool exit_flag;
};
} } // namespace log4cplus { namespace helpers {
#endif // ! defined (LOG4CPLUS_SINGLE_THREADED)
#endif // LOG4CPLUS_HELPERS_CONNECTORTHREAD_H
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