serverlogger.java

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/*
 * Created on May 28, 2005
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package org.GTADS.debug;

import java.io.BufferedWriter;
import java.io.EOFException;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Vector;

import org.GTADS.server.*;
import org.GTADS.helper.*;

/**
 * @author Steven Day
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public final class ServerLogger extends Thread {
	public static ServerLogger instance;
	private Vector logLineQueue = new Vector();
	
	public static ServerLogger getInstance(){
		if (instance == null){
			synchronized(ServerLogger.class){
				instance = new ServerLogger();
			}
		}
		return instance;
	}
	
	public static void clearInstance(){
		if (instance != null){
			instance = null;
		}
	}
	
	public static boolean hasInstance(){
		return instance != null;
	}
	
	public ServerLogger (){
		ServerLogger.sendConsoleOutput("Starting up Logging to " + ServerConfig.getInstance().getLogFileName(), this.getClass());
		this.setName("File Logging Thread");
		this.setPriority(10);
		start();
	}
	
	public void run(){
		try {
			while (true) {
				Thread.sleep(2000);
				synchronized(ServerLogger.class){
					writeLinesToFile();
				}
			}
		} catch (InterruptedException ie){
			
		} catch (EOFException eof) {
			instance = null;
			ServerLogger.sendConsoleDebugMessage("Error writing to file " + ServerConfig.getInstance().getLogFileName(), ServerLogger.class, 5);
		} catch (IOException ioe) {
			ServerLogger.sendConsoleDebugMessage("Error writing to file " + ServerConfig.getInstance().getLogFileName(), ServerLogger.class, 5);
		}
	}
	
	private void writeLinesToFile() throws EOFException, IOException{
		File logFile = new File(ServerConfig.getInstance().getLogFileName());
		BufferedWriter buffer = new BufferedWriter(new FileWriter(logFile, true));
		
		for (int i = 0; i < logLineQueue.size(); i++){
			buffer.newLine();
			buffer.write((String)logLineQueue.get(i));
		}
		logLineQueue.clear();
		buffer.close();
	}
	
	private void addToVectorQueue(String logLine){
		//try {
			//this.wait();
			logLineQueue.add(logLine);
		//} //catch (InterruptedException ie){
			
		//}
	}
	
	public static void sendConsoleOutput(Object printable, Class printableClass){
		if (ServerConfig.getInstance().isConsoleOutAllowed()) {
			String logLine = Helper.getDate(true) + " -- " + printableClass.toString() + " -- " + printable;
			System.out.println(logLine);
			if (ServerLogger.hasInstance()){
				ServerLogger.getInstance().addToVectorQueue(logLine);
			}
		}
		
		/* TODO
		 * Give the option to write to a log file
		 * */
	}
	
	public static void sendConsoleDebugMessage(String printable, Class printableClass, int debugLevel) {
		if (ServerConfig.getInstance().consoleDebugLevel() >= debugLevel){
			String logLine = Helper.getDate(true) + " ++ " + printableClass.toString() + " ++ Debug Message ++ " + printable;
			System.err.println(logLine);
			if (ServerLogger.hasInstance()){
				ServerLogger.getInstance().addToVectorQueue(logLine);
			}
		}
	}
	
	public static void sendConsoleDebugMessage(String printable, Class printableClass){
		if (ServerConfig.getInstance().consoleDebugLevel() > 0)
			sendConsoleDebugMessage(printable, printableClass, 0);
	}
}