apps/MQTTSN-Gateway/src/org/eclipse/paho/mqttsn/gateway/utils/GatewayLogger.java

/*******************************************************************************
 * Copyright (c) 2008, 2014 IBM Corp.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution. 
 *
 * The Eclipse Public License is available at 
 *    http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 *   http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Ian Craggs - initial API and implementation and/or initial documentation
 *******************************************************************************/

package org.eclipse.paho.mqttsn.gateway.utils;


import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.eclipse.paho.mqttsn.gateway.exceptions.MqttsException;

public class GatewayLogger {
	
	public final static int INFO  = 1;
	public final static int WARN  = 2;
	public final static int ERROR = 3;
	
	private static int LOG_LEVEL = INFO;
	

	public static void info(String msg) {
		DateFormat dFormat = new SimpleDateFormat("dd MMM yyyy HH:mm:ss z");
		System.out.println(dFormat.format(new Date())+ "  INFO:  " + msg);
		if(printWriter != null){
			printWriter.println(dFormat.format(new Date())+ "  INFO:  " + msg);
			printWriter.flush();
		}			
	}
	
	public static void warn(String msg) {
		DateFormat dFormat= new SimpleDateFormat("dd MMM yyyy HH:mm:ss z");
		System.err.println(dFormat.format(new Date())+ "  WARN:  "+ msg);
		if(printWriter != null){
			printWriter.println(dFormat.format(new Date())+ "  WARN:  "+ msg);
			printWriter.flush();
		}
	}

	public static void error(String msg) {	
		DateFormat dFormat= new SimpleDateFormat("dd MMM yyyy HH:mm:ss z");
		System.err.println(dFormat.format(new Date())+ "  ERROR: " + msg);
		if(printWriter != null){
			printWriter.println(dFormat.format(new Date())+ "  ERROR: " + msg);
			printWriter.flush();
		}
	}

	
	public static void log(int logLevel, String msg) {
		if(logLevel >= LOG_LEVEL) {			
			switch (logLevel){
				case INFO:
					info(msg);
					break;
				case WARN:
					warn(msg);
					break;
				case ERROR:
					error(msg);
					break;
				default:
			}
		}
	}

	
	public static void setLogLevel(int logLevel) {
		LOG_LEVEL = logLevel;
	}
	
	
	private static FileWriter fileWriter;
	private static PrintWriter printWriter;
	
	public static void setLogFile(String file) throws MqttsException {
		DateFormat dFormat = new SimpleDateFormat("dd MMM yyyy HH:mm:ss z");
		try {
			fileWriter = new FileWriter(file);
			printWriter = new PrintWriter(fileWriter);
			printWriter.println();
			printWriter.println(dFormat.format(new Date())+ "  INFO:  -----------------------------------------Mqtts Gateway starting----------------------------------------");
			printWriter.println(dFormat.format(new Date())+ "  INFO:  Loading Mqtts Gateway parameters....");
		} catch(IOException e) {
			e.printStackTrace();
			throw new MqttsException (e.getMessage());
		}
	}
}