http://www.slf4j.org: The slf4j API (QOS.ch)
  • Ceki Gulcu 
Copyright (c) 2004-2011 QOS.ch
All rights reserved.
Permission is hereby granted, free  of charge, to any person obtaining
a  copy  of this  software  and  associated  documentation files  (the
"Software"), to  deal in  the Software without  restriction, including
without limitation  the rights to  use, copy, modify,  merge, publish,
distribute,  sublicense, and/or sell  copies of  the Software,  and to
permit persons to whom the Software  is furnished to do so, subject to
the following conditions:
The  above  copyright  notice  and  this permission  notice  shall  be
included in all copies or substantial portions of the Software.
THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

/**
 * Copyright (c) 2004-2011 QOS.ch
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.slf4j;

import org.slf4j.helpers.BasicMarkerFactory;
import org.slf4j.helpers.Util;
import org.slf4j.impl.StaticMarkerBinder;


MarkerFactory is a utility class producing Marker instances as appropriate for the logging system currently in use. 
 This class is essentially implemented as a wrapper around an IMarkerFactory instance bound at compile time. 

Please note that all methods in this class are static.

Author:Ceki Gülcü
/**
 * MarkerFactory is a utility class producing {@link Marker} instances as
 * appropriate for the logging system currently in use.
 * 
 * <p>
 * This class is essentially implemented as a wrapper around an
 * {@link IMarkerFactory} instance bound at compile time.
 * 
 * <p>
 * Please note that all methods in this class are static.
 * 
 * @author Ceki G&uuml;lc&uuml;
 */
public class MarkerFactory {
    static IMarkerFactory MARKER_FACTORY;

    private MarkerFactory() {
    }

    
As of SLF4J version 1.7.14, StaticMarkerBinder classes shipping in various bindings
come with a getSingleton() method. Previously only a public field called SINGLETON 
was available.

Throws:
Returns:IMarkerFactory
Since:1.7.14
/**
     * As of SLF4J version 1.7.14, StaticMarkerBinder classes shipping in various bindings
     * come with a getSingleton() method. Previously only a public field called SINGLETON 
     * was available.
     * 
     * @return IMarkerFactory
     * @throws NoClassDefFoundError in case no binding is available
     * @since 1.7.14
     */
    private static IMarkerFactory bwCompatibleGetMarkerFactoryFromBinder() throws NoClassDefFoundError {
        try {
            return StaticMarkerBinder.getSingleton().getMarkerFactory();
        } catch (NoSuchMethodError nsme) {
            // binding is probably a version of SLF4J older than 1.7.14
            return StaticMarkerBinder.SINGLETON.getMarkerFactory();
        }
    }

    // this is where the binding happens
    static {
        try {
            MARKER_FACTORY = bwCompatibleGetMarkerFactoryFromBinder();
        } catch (NoClassDefFoundError e) {
            MARKER_FACTORY = new BasicMarkerFactory();
        } catch (Exception e) {
            // we should never get here
            Util.report("Unexpected failure while binding MarkerFactory", e);
        }
    }

    
Return a Marker instance as specified by the name parameter using the previously bound IMarkerFactoryinstance. 
Params:
  • name –  The name of the Marker object to return.
Returns:marker
/**
     * Return a Marker instance as specified by the name parameter using the
     * previously bound {@link IMarkerFactory}instance.
     * 
     * @param name
     *          The name of the {@link Marker} object to return.
     * @return marker
     */
    public static Marker getMarker(String name) {
        return MARKER_FACTORY.getMarker(name);
    }

    
Create a marker which is detached (even at birth) from the MarkerFactory.

Params:
  • name – the name of the marker
Returns:a dangling marker
Since:1.5.1
/**
     * Create a marker which is detached (even at birth) from the MarkerFactory.
     *
     * @param name the name of the marker
     * @return a dangling marker
     * @since 1.5.1
     */
    public static Marker getDetachedMarker(String name) {
        return MARKER_FACTORY.getDetachedMarker(name);
    }

    
Return the IMarkerFactoryinstance in use. 
The IMarkerFactory instance is usually bound with this class at 
compile time.

Returns:the IMarkerFactory instance in use
/**
     * Return the {@link IMarkerFactory}instance in use.
     * 
     * <p>The IMarkerFactory instance is usually bound with this class at 
     * compile time.
     * 
     * @return the IMarkerFactory instance in use
     */
    public static IMarkerFactory getIMarkerFactory() {
        return MARKER_FACTORY;
    }
}