exceptionlogfilter.java

POS is a Java&#174 platform-based, mission-critical, ISO-8583 based financial transaction library/fr

/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2008 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.util;

import java.util.Iterator;

/**
 * A specific log listener that filters all LogEvents that doesn't
 * contain any exception.
 * @author Alejandro Revilla
 * @version $Revision: 2594 $ $Date: 2008-01-22 14:41:31 -0200 (Tue, 22 Jan 2008) $
 */
public class ExceptionLogFilter implements LogListener {
    public ExceptionLogFilter () {
        super();
    }
    public synchronized LogEvent log (LogEvent evt) {
        Iterator iter = evt.getPayLoad().iterator();
        while (iter.hasNext()) {
            if (iter.next() instanceof Throwable)
                return evt;
        }
        return null;
    }
}