de.fhg.iais.commons.time.StopWatch.java Source code

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Here is the source code for de.fhg.iais.commons.time.StopWatch.java

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package de.fhg.iais.commons.time;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

/******************************************************************************
 * Copyright 2011 (c) Fraunhofer IAIS Netmedia  http://www.iais.fraunhofer.de *
 * ************************************************************************** *
 * 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.                                             *
 ******************************************************************************/

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

public final class StopWatch {
    private static final Logger LOG = LoggerFactory.getLogger(StopWatch.class);

    private long start;
    private long daysMilliseconds = 86400000;

    private StopWatch() {
    }

    public static synchronized StopWatch start() {
        StopWatch st = new StopWatch();
        st.start = System.currentTimeMillis();
        return st;
    }

    public long stop() {
        long diff = System.currentTimeMillis() - this.start;
        return diff;
    }

    public void stop(String explain) {
        LOG.info(explain + " " + stopTime());
    }

    public String stopTime() {
        return DateFormatUtils.formatUTC(stop(), DateFormatUtils.ISO_TIME_NO_T_FORMAT.getPattern());
    }

    public String stopTimeFormat(String format, TimeZone zone) {
        if (format == null || format.equals("")) {
            format = "'P'DDD'DT'HH'H'mm'M'ss'S'";
        }
        if (zone == null) {
            zone = TimeZone.getTimeZone("GMT0");
        }
        long end = stop();
        if (end < this.daysMilliseconds) {
            Date endDate = new Date(end);
            SimpleDateFormat formatter = new SimpleDateFormat("'000D:'HH'h:'mm'm:'ss's'");
            formatter.setTimeZone(zone);
            return formatter.format(endDate);
        } else {
            end -= this.daysMilliseconds;
            Date endDate = new Date(end);
            SimpleDateFormat formatter = new SimpleDateFormat(format);
            formatter.setTimeZone(zone);
            return formatter.format(endDate);
        }
    }
}