001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2023 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.util;
020
021/**
022 * A specific log listener that filters all LogEvents that doesn't
023 * contain any exception.
024 * @author Alejandro Revilla
025 * @version $Revision$ $Date$
026 */
027public class ExceptionLogFilter implements LogListener {
028    public ExceptionLogFilter () {
029        super();
030    }
031    public synchronized LogEvent log (LogEvent evt) {
032        synchronized (evt.getPayLoad()) {
033            for (Object o : evt.getPayLoad()) {
034                if (o instanceof Throwable)
035                    return evt;
036            }
037        }
038        return null;
039    }
040}
041