001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.q2.qbean;
020
021import org.jdom2.Element;
022import org.jpos.core.ConfigurationException;
023import org.jpos.q2.QBeanSupport;
024import org.jpos.q2.QFactory;
025import org.jpos.util.*;
026
027import java.io.IOException;
028import java.io.PrintStream;
029
030public class LoggerAdaptor extends QBeanSupport {
031    private Logger logger;
032    private PrintStream originalOut = null;
033    private PrintStream originalErr = null;
034
035    protected void initService () {
036        logger = Logger.getLogger (getName());
037    }
038    protected void startService () throws ConfigurationException, IOException {
039        logger.removeAllListeners ();
040        for (Element lle : getPersist().getChildren("log-listener"))
041            addListener(lle);
042
043        String redirect = cfg.get("redirect");
044        long delay = cfg.getLong("delay", 500);
045
046        if (redirect.contains("stdout")) {
047            originalOut = System.out;
048            System.setOut(new PrintStream(new LogEventOutputStream(logger, "stdout", delay)));
049        }
050        if (redirect.contains("stderr")) {
051            originalErr = System.err;
052            System.setErr(new PrintStream(new LogEventOutputStream(logger, "stderr", delay)));
053        }
054    }
055    protected void stopService() {
056        if (originalOut != null)
057            System.setOut(originalOut);
058        if (originalErr != null)
059            System.setErr(originalErr);
060        logger.removeAllListeners ();
061    }
062    protected void destroyService() {
063        // we don't destroy (that would unregister the logger from the
064        // NameRegistrar) because other components might have references
065        // to this logger.
066        //
067        // logger.destroy ();
068    }
069
070    private void addListener (Element e) throws ConfigurationException {
071        QFactory factory = getServer().getFactory();
072        LogListener listener = factory.newInstance(e);
073        if (listener != null) {
074            attemptToAddWriter(e.getChild("writer"), listener);
075            logger.addListener(listener);
076        }
077    }
078
079    private void attemptToAddWriter (Element e, LogListener listener) throws ConfigurationException {
080        if (e != null) {
081            QFactory factory = getServer().getFactory();
082            if (QFactory.isEnabled(e)) {
083                String clazz = e.getAttributeValue("class");
084                LogEventWriter writer = factory.newInstance(clazz);
085                factory.setConfiguration(writer, e);
086                listener.setLogEventWriter (writer);
087            }
088        }
089    }
090}