001/*
002 * JGrapes Event Driven Framework
003 * Copyright (C) 2016-2026 Michael N. Lipp
004 * 
005 * This program is free software; you can redistribute it and/or modify it 
006 * under the terms of the GNU Affero General Public License as published by 
007 * the Free Software Foundation; either version 3 of the License, or 
008 * (at your option) any later version.
009 * 
010 * This program is distributed in the hope that it will be useful, but 
011 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
012 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public
013 * 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.jgrapes.core.internal;
020
021import org.jgrapes.core.ComponentType;
022import org.jgrapes.core.events.Error;
023
024/**
025 * A fallback error printer.
026 */
027public class ErrorPrinter implements ComponentType {
028
029    /**
030     * Prints the error.
031     *
032     * @param event the event
033     */
034    @SuppressWarnings({ "PMD.SystemPrintln",
035        "PMD.AvoidPrintStackTrace" })
036    public void printError(Error event) {
037        String msg = "Unhandled " + event;
038        System.err.println(msg);
039        if (event.throwable() == null) {
040            System.err.println("No stack trace available.");
041        } else {
042            event.throwable().printStackTrace();
043        }
044    }
045
046}