SimplestFormatter.java

/**
 * Copyright 2005-2014 Restlet
 * 
 * The contents of this file are subject to the terms of one of the following
 * open source licenses: Apache 2.0 or or EPL 1.0 (the "Licenses"). You can
 * select the license that you prefer but you may not use this file except in
 * compliance with one of these Licenses.
 * 
 * You can obtain a copy of the Apache 2.0 license at
 * http://www.opensource.org/licenses/apache-2.0
 * 
 * You can obtain a copy of the EPL 1.0 license at
 * http://www.opensource.org/licenses/eclipse-1.0
 * 
 * See the Licenses for the specific language governing permissions and
 * limitations under the Licenses.
 * 
 * Alternatively, you can obtain a royalty free commercial license with less
 * limitations, transferable or non-transferable, directly at
 * http://restlet.com/products/restlet-framework
 * 
 * Restlet is a registered trademark of Restlet S.A.S.
 */

package org.restlet.engine.log;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;

/**
 * Special log formatter that displays the actual message only. It also displays
 * the stack trace if available.
 * 
 * This is particularly useful for debugging.
 * 
 * @author Jerome Louvel
 */
public class SimplestFormatter extends Formatter {

    /**
     * Format the given LogRecord.
     * 
     * @param record
     *            the log record to be formatted.
     * @return a formatted log record
     */
    public synchronized String format(LogRecord record) {
        StringBuilder sb = new StringBuilder();

        sb.append(formatMessage(record));
        sb.append('\n');

        if (record.getThrown() != null) {
            try {
                sb.append(System.getProperty("line.separator"));
                StringWriter sw = new StringWriter();
                PrintWriter pw = new PrintWriter(sw);
                record.getThrown().printStackTrace(pw);
                pw.close();
                sb.append(sw.toString());
            } catch (Exception ex) {
            }
        }

        return sb.toString();
    }

}