Logback: the reliable, generic, fast and flexible logging framework.
Copyright (C) 1999-2015, QOS.ch. All rights reserved.
This program and the accompanying materials are dual-licensed under
either the terms of the Eclipse Public License v1.0 as published by
the Eclipse Foundation
  or (per the licensee's choosing)
under the terms of the GNU Lesser General Public License version 2.1
as published by the Free Software Foundation.
/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.classic.turbo;

import org.slf4j.MDC;
import org.slf4j.Marker;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.core.spi.FilterReply;

This class allows output for a given MDC value.

When the given value is identified by this TurboFilter, 
the reply is based on the OnMatch option.
The information is taken from the MDC. For this TurboFilter to work,
one must set the key that will be used to 
access the information in the MDC.

To allow output for the value, set the OnMatch option
to ACCEPT. To disable output for the given value, set
the OnMatch option to DENY.

By default, values of the OnMatch and OnMisMatch
options are set to NEUTRAL.
Author:
Ceki Gülcü, Sébastien Pennec/**
 * This class allows output for a given MDC value.
 * 
 * <p>
 * When the given value is identified by this TurboFilter, 
 * the reply is based on the OnMatch option.
 * The information is taken from the MDC. For this TurboFilter to work,
 * one must set the key that will be used to 
 * access the information in the MDC.
 * 
 * <p>
 * To allow output for the value, set the OnMatch option
 * to ACCEPT. To disable output for the given value, set
 * the OnMatch option to DENY.
 * 
 * <p>
 * By default, values of the OnMatch and OnMisMatch
 * options are set to NEUTRAL.
 * 
 *
 * @author Ceki G&uuml;lc&uuml;
 * @author S&eacute;bastien Pennec
 */
public class MDCFilter extends MatchingFilter {

    String MDCKey;
    String value;

    @Override
    public FilterReply decide(Marker marker, Logger logger, Level level, String format, Object[] params, Throwable t) {
        if (MDCKey == null) {
            return FilterReply.NEUTRAL;
        }

        String value = MDC.get(MDCKey);
        if (this.value.equals(value)) {
            return onMatch;
        }
        return onMismatch;
    }

    public void setValue(String value) {
        this.value = value;
    }

    public void setMDCKey(String MDCKey) {
        this.MDCKey = MDCKey;
    }

}