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jsync.io is a non-blocking, event-driven networking framework for Java

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/*
 * Copyright 2009 Red Hat, Inc.
 * Red Hat licenses this file to you under the Apache License, version
 * 2.0 (the "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *    http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * Modified from original form by Tim Fox
 */
package io.jsync.logging.impl;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.LogRecord;

/**
 * @author Andy Taylor
 */
public class DefaultLoggerFormatter extends java.util.logging.Formatter {
    private static String LINE_SEPARATOR = System.getProperty("line.separator");

    @Override
    public String format(final LogRecord record) {
        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss,SSS");
        StringBuffer sb = new StringBuffer();
        // Minimize memory allocations here.
        date.setTime(record.getMillis());
        sb.append("[").append(Thread.currentThread().getName()).append("] ");
        sb.append(dateFormat.format(date)).append(" ");
        sb.append(record.getLevel()).append(" [");
        sb.append(record.getLoggerName()).append("]").append("  ");
        sb.append(record.getMessage());

        sb.append(DefaultLoggerFormatter.LINE_SEPARATOR);
        if (record.getThrown() != null) {
            try {
                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();
    }

}