//
// Channel.h
//
// $Id: //poco/Main/Foundation/include/Foundation/Channel.h#5 $
//
// Definition of the Channel class.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, 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.
// 
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS 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
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef Foundation_Channel_INCLUDED
#define Foundation_Channel_INCLUDED


#ifndef Foundation_Foundation_INCLUDED
#include "Foundation/Foundation.h"
#endif
#ifndef Foundation_Configurable_INCLUDED
#include "Foundation/Configurable.h"
#endif
#ifndef Foundation_Mutex_INCLUDED
#include "Foundation/Mutex.h"
#endif
#ifndef Foundation_RefCountedObject_INCLUDED
#include "Foundation/RefCountedObject.h"
#endif


Foundation_BEGIN


class Message;


class Foundation_API Channel: public Configurable, public RefCountedObject
	/// The base class for all Channel classes.
	///
	/// Supports reference counting based garbage
	/// collection and provides trivial implementations
	/// of getProperty() and setProperty().
{
public:
	Channel();
		/// Creates the channel and initializes
		/// the reference count to one.

	virtual void open();
		/// Does whatever is necessary to open the channel. 
		/// The default implementation does nothing.
		
	virtual void close();
		/// Does whatever is necessary to close the channel.
		/// The default implementation does nothing.
		
	virtual void log(const Message& msg) = 0;
		/// Logs the given message to the channel. Must be
		/// overridden by subclasses.
		
	void setProperty(const std::string& name, const std::string& value);
		/// Throws a PropertyNotSupportedException.

	std::string getProperty(const std::string& name) const;
		/// Throws a PropertyNotSupportedException.
		
protected:
	virtual ~Channel();
};


Foundation_END


#endif // Foundation_Channel_INCLUDED