quartz/content/vault/Logger.md

#cs240 Example file given from teacher's files and lecture:

private static Logger logger;

static { // static initializer block - sorta like a constructor for static members of a class
	try {
		initLog();
	}
	catch (IOException e){
		System.out.println("Could not initialize log: " + e.getMessage());
		e.printStackTrace();
		}
}

You'll want an initLog function, to set the whole thing up

private static void initLog() throws IOException {

    Level logLevel = Level.FINEST;

    logger = Logger.getLogger("tickettoride"); 
    logger.setLevel(logLevel);
    logger.setUseParentHandlers(false);\

Actual Logging:

To log to the console:

    Handler consoleHandler = new ConsoleHandler();
    consoleHandler.setLevel(logLevel);
    consoleHandler.setFormatter(new SimpleFormatter());
    logger.addHandler(consoleHandler);

To log to a file:

    FileHandler fileHandler = new FileHandler("log.txt", false);
    fileHandler.setLevel(logLevel);
    fileHandler.setFormatter(new SimpleFormatter());
    logger.addHandler(fileHandler);
}
	// NON-STATIC MEMBERS
private HttpServer server;

private void run(String portNumber) {

    logger.info("Initializing HTTP Server");
    try {
        server = HttpServer.create(
				new InetSocketAddress(Integer.parseInt(portNumber)),
                MAX_WAITING_CONNECTIONS);
    }

It's important to log any exceptions.

    catch (IOException e) {
        logger.log(Level.SEVERE, e.getMessage(), e);
        return;
    }

    server.setExecutor(null); // use the default executor

    logger.info("Creating contexts");
    server.createContext("/games/list", new ListGamesHandler());
	server.createContext("/routes/claim", new ClaimRouteHandler());
	
    logger.info("Starting HTTP server");
    server.start();
}

There are entering and exiting methods available, too.

        logger.entering("ListGamesHandler", "handle");