//
// Channel.h
//
// Library: Foundation
// Package: Logging
// Module:  Channel
//
// Definition of the Channel class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_Channel_INCLUDED
#define Foundation_Channel_INCLUDED


#include "Poco/Configurable.h"
#include "Poco/Foundation.h"
#include "Poco/Mutex.h"
#include "Poco/RefCountedObject.h"


namespace Poco
{


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.
    ///
    /// If the channel has not been opened yet, the log()
    /// method will open it.

    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();

private:
    Channel(const Channel &);
    Channel & operator=(const Channel &);
};


} // namespace Poco


#endif // Foundation_Channel_INCLUDED