com.liferay.portal.kernel.util.LoggingTimer.java Source code

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Here is the source code for com.liferay.portal.kernel.util.LoggingTimer.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.util;

import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;

import java.io.Closeable;

/**
 * @author Shuyang Zhou
 */
public class LoggingTimer implements Closeable {

    public LoggingTimer() {
        this(_getInvokerName(null, null), System.currentTimeMillis());
    }

    public LoggingTimer(Class<?> clazz, String name) {
        this(_getInvokerName(clazz, name), System.currentTimeMillis());
    }

    public LoggingTimer(String name) {
        this(_getInvokerName(null, name), System.currentTimeMillis());
    }

    @Override
    public void close() {
        if (_log.isInfoEnabled()) {
            _log.info(StringBundler.concat("Completed ", _name, " in ",
                    String.valueOf(System.currentTimeMillis() - _startTime), " ms"));
        }
    }

    private static String _getInvokerName(Class<?> clazz, String name) {
        Thread thread = Thread.currentThread();

        StackTraceElement[] stackTraceElements = thread.getStackTrace();

        StackTraceElement stackTraceElement = stackTraceElements[3];

        StringBundler sb = new StringBundler(5);

        if (clazz == null) {
            sb.append(stackTraceElement.getClassName());
        } else {
            sb.append(clazz.getName());
        }

        sb.append(StringPool.POUND);
        sb.append(stackTraceElement.getMethodName());

        if (name != null) {
            sb.append(StringPool.POUND);
            sb.append(name);
        }

        return sb.toString();
    }

    private LoggingTimer(String name, long startTime) {
        _name = name;
        _startTime = startTime;

        if (_log.isInfoEnabled()) {
            _log.info("Starting " + name);
        }
    }

    private static final Log _log = LogFactoryUtil.getLog(LoggingTimer.class);

    private final String _name;
    private final long _startTime;

}