001/**
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v1.0 as published by
007 * the Eclipse Foundation
008 *
009 *   or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014package chapters.migrationFromLog4j;
015
016import ch.qos.logback.classic.spi.ILoggingEvent;
017import ch.qos.logback.core.AppenderBase;
018import ch.qos.logback.core.Layout;
019
020public class TrivialLogbackAppender extends AppenderBase<ILoggingEvent> {
021
022    Layout<ILoggingEvent> layout;
023
024    @Override
025    public void start() {
026        if (this.layout == null) {
027            addError("No layout set for the appender named [" + name + "].");
028            return;
029        }
030        String header = layout.getFileHeader();
031        System.out.println(header);
032        super.start();
033    }
034
035    @Override
036    protected void append(ILoggingEvent loggingEvent) {
037        // note that AppenderBase.doAppend will invoke this method only if
038        // this appender was successfully started.
039        String eventAsStr = this.layout.doLayout(loggingEvent);
040        System.out.println(eventAsStr);
041    }
042
043
044    public Layout<ILoggingEvent> getLayout() {
045        return layout;
046    }
047
048    public void setLayout(Layout<ILoggingEvent> layout) {
049        this.layout = layout;
050    }
051
052}