/*
 * Copyright (c) 2005-2011 Grameen Foundation USA
 * 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.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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.
 *
 * See also http://www.apache.org/licenses/LICENSE-2.0.html for an
 * explanation of the license and how it is applied.
 */

package org.mifos.framework.components.logger;

import java.lang.reflect.Method;

import org.apache.commons.lang.time.StopWatch;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Deprecated // used only in reporting
public class ServiceActivityLogger implements ServiceLogger {

    private static final Logger logger = LoggerFactory.getLogger(ServiceActivityLogger.class);
    protected final String serviceName;
    private StopWatch stopWatch;

    public ServiceActivityLogger() {
        this(null);
    }

    public ServiceActivityLogger(String serviceName) {
        super();
        this.serviceName = serviceName;
        stopWatch = new StopWatch();
    }

    @Override
	public void startOfServiceCall(Method method, Object[] args) {
        startTiming();
        logStartActivity(method);
    }

    @Override
	public void endOfServiceCall(Method method, Object[] args) {
        stopTiming();
        logEndActivity(method);
        stopWatch.reset();
    }

    private void logStartActivity(Method method) {
        logger.info("Calling Service  : " + createStartLogMessage(method));
    }

    private void logEndActivity(Method method) {
        logger.info("Finished Service : " + createEndLogMessage(method));
    }

    protected String createStartLogMessage(Method method) {
        return serviceInfoMsg(method);
    }

    protected String createEndLogMessage(Method method) {
        return "Time Taken " + getTiming() + createStartLogMessage(method);
    }

    private String serviceInfoMsg(Method method) {
        return "Service " + serviceName + " invoked Method " + method.getName();
    }

    // Apparently stop watch is not thread safe, will refine it if required
    private void startTiming() {
        try {
            stopWatch.start();
        } catch (IllegalStateException e) {

        }
    }

    private void stopTiming() {
        try {
            stopWatch.stop();
        } catch (IllegalStateException e) {
        }
    }

    private long getTiming() {
        long totalTimeSpent;
        try {
            totalTimeSpent = stopWatch.getTime();
        } catch (RuntimeException e) {
            return 0;
        }
        return totalTimeSpent;
    }
}