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Emulated SDN-WISE Java Nodes

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/*
 * Copyright (C) 2015 SDN-WISE
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package com.github.sdnwiselab.sdnwise.mote.logger;

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

/**
 * Representation of the formatter used by the loggers of the nodes.
 *
 * @author Sebastiano Milardo
 */
public class MoteFormatter extends Formatter {

    /**
     * Format the given LogRecord.
     *
     * @param record the log record to be formatted.
     * @return a formatted log record
     */
    @Override
    public final synchronized String format(final LogRecord record) {

        StringBuilder sb = new StringBuilder();
        String message = formatMessage(record);

        sb.append(message);

        if (record.getThrown() != null) {
            try {
                StringWriter sw = new StringWriter();
                try (PrintWriter pw = new PrintWriter(sw)) {
                    record.getThrown().printStackTrace(pw);
                }
                sb.append(sw.toString());
            } catch (Exception ex) {
                System.err.println(ex.getLocalizedMessage());
            }
        }
        return sb.append("\n").toString();
    }
}