http://logback.qos.ch/logback-classic: logback-classic module (QOS.ch)
  • Ceki Gulcu
  • Joern Huxhorn 
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.filter;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.filter.Filter;
import ch.qos.logback.core.spi.FilterReply;


Filters events below the threshold level.
Events with a level below the specified
level will be denied, while events with a level
equal or above the specified level will trigger a
FilterReply.NEUTRAL result, to allow the rest of the
filter chain process the event.
For more information about filters, please refer to the online manual at
http://logback.qos.ch/manual/filters.html#thresholdFilter

Author:Sébastien Pennec
/**
 * Filters events below the threshold level.
 * 
 * Events with a level below the specified
 * level will be denied, while events with a level
 * equal or above the specified level will trigger a
 * FilterReply.NEUTRAL result, to allow the rest of the
 * filter chain process the event.
 * 
 * For more information about filters, please refer to the online manual at
 * http://logback.qos.ch/manual/filters.html#thresholdFilter
 *
 * @author Sébastien Pennec
 */
public class ThresholdFilter extends Filter<ILoggingEvent> {

    Level level;

    @Override
    public FilterReply decide(ILoggingEvent event) {
        if (!isStarted()) {
            return FilterReply.NEUTRAL;
        }

        if (event.getLevel().isGreaterOrEqual(level)) {
            return FilterReply.NEUTRAL;
        } else {
            return FilterReply.DENY;
        }
    }

    public void setLevel(String level) {
        this.level = Level.toLevel(level);
    }

    public void start() {
        if (this.level != null) {
            super.start();
        }
    }
}