TokenVendingMachineLogger.java

/*
 * Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

package com.amazonaws.tvm;

import java.io.IOException;
import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.SimpleFormatter;

/**
 * Utility used to enable logging for applications launched in AWS Elastic
 * BeanStalk.
 */
public class TokenVendingMachineLogger {

    private static Logger logger;

    @Override
    protected Object clone() throws CloneNotSupportedException {
        throw new CloneNotSupportedException();
    }

    /**
     * Get the logger for TVM
     */
    public synchronized static Logger getLogger() {
        if (null != logger) {
            return logger;
        }

        logger = Logger.getLogger("TokenVendingMachineLogger");
        FileHandler handler;
        try {
            handler = new FileHandler("MyLogFile.txt", true);

            SimpleFormatter formatter = new SimpleFormatter();
            handler.setFormatter(formatter);

            logger.addHandler(handler);
            logger.setLevel(Level.ALL);

        } catch (IOException e) {
            throw new RuntimeException("Failed to initialize logger. Aborting.", e);
        }

        return logger;
    }

    private TokenVendingMachineLogger() {
    }

}