com.ikon.util.FileLogger.java Source code

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Here is the source code for com.ikon.util.FileLogger.java

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/**
 *  openkm, Open Document Management System (http://www.openkm.com)
 *  Copyright (c) 2006-2013  Paco Avila & Josep Llort
 *
 *  No bytes were intentionally harmed during the development of this application.
 *
 *  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 2 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, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package com.ikon.util;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.text.MessageFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.io.IOUtils;

import com.ikon.core.Config;

public class FileLogger {
    private static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss,SSS";
    private static final String LEVEL_INFO = "INFO ";
    private static final String LEVEL_WARN = "WARN ";
    private static final String LEVEL_ERROR = "ERROR";

    private Writer cLogger = null;

    /**
     * Create a new file logger.
     * 
     * @param baseName The base name of the log file
     * @throws IOException If there is an exception when creating.
     */
    public FileLogger(String baseName) throws IOException {
        cLogger = new FileWriter(getLogFile(baseName), true);
    }

    /**
     * Write message to log file.
     * 
     * @param message Message to write.
     * @throws IOException If there is an exception when writing.
     */
    public void info(String message, Object... params) throws IOException {
        cLogger.write(getLogEntry(LEVEL_INFO, message, params));
        cLogger.flush();
    }

    /**
     * Write message to log file.
     * 
     * @param message Message to write.
     * @throws IOException If there is an exception when writing.
     */
    public void warn(String message, Object... params) throws IOException {
        cLogger.write(getLogEntry(LEVEL_WARN, message, params));
        cLogger.flush();
    }

    /**
     * Write message to log file.
     * 
     * @param message Message to write.
     * @throws IOException If there is an exception when writing.
     */
    public void error(String message, Object... params) throws IOException {
        cLogger.write(getLogEntry(LEVEL_ERROR, message, params));
        cLogger.flush();
    }

    /**
     * Close log file.
     */
    public void close() {
        IOUtils.closeQuietly(cLogger);
    }

    /**
     * Static file logger.
     * 
     * @throws IOException If there is an exception when writing.
     */
    public static void info(String baseName, String message, Object... params) throws IOException {
        logWrite(baseName, LEVEL_INFO, message, params);
    }

    /**
     * Static file logger.
     * 
     * @throws IOException If there is an exception when writing.
     */
    public static void warn(String baseName, String message, Object... params) throws IOException {
        logWrite(baseName, LEVEL_WARN, message, params);
    }

    /**
     * Static file logger.
     * 
     * @throws IOException If there is an exception when writing.
     */
    public static void error(String baseName, String message, Object... params) throws IOException {
        logWrite(baseName, LEVEL_ERROR, message, params);
    }

    /**
     * Write to log file
     * 
     * @throws IOException If there is an exception when writing.
     */
    private static void logWrite(String baseName, String level, String message, Object... params)
            throws IOException {
        Writer sLogger = new FileWriter(getLogFile(baseName), true);
        sLogger.write(getLogEntry(level, message, params));
        sLogger.flush();
        sLogger.close();
    }

    /**
     * Create a log file name from a base name.
     * 
     * @param baseName The base name to construct the file name.
     * @return The result file name.
     */
    private static String getLogFile(String baseName) {
        String fileDate = new SimpleDateFormat("yyyyMMdd").format(new Date());
        return Config.HOME_DIR + File.separator + baseName + "_" + fileDate + ".log";
    }

    /**
     * Build a long entry.
     * 
     * @param message Message to log.
     * @param params Optional menssage params.
     * @return An String with the long entry.
     */
    private static String getLogEntry(String level, String message, Object... params) {
        StringBuilder sb = new StringBuilder();
        sb.append(new SimpleDateFormat(DATE_FORMAT).format(new Date()));
        sb.append(" ");
        sb.append(level);
        sb.append(" ");
        sb.append(MessageFormat.format(message, params));
        sb.append("\n");
        return sb.toString();
    }
}