com.jaeksoft.searchlib.util.Timer.java Source code

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Here is the source code for com.jaeksoft.searchlib.util.Timer.java

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/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 2008-2012 Emmanuel Keller / Jaeksoft
 * 
 * http://www.open-search-server.com
 * 
 * This file is part of OpenSearchServer.
 *
 * OpenSearchServer is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * OpenSearchServer 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OpenSearchServer. 
 *  If not, see <http://www.gnu.org/licenses/>.
 **/

package com.jaeksoft.searchlib.util;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.StringEscapeUtils;

import com.jaeksoft.searchlib.Logging;

public class Timer {

    private long startTime;
    private long endTime;
    private String info;
    private String error;
    final private List<Timer> childs;

    public Timer(String info) {
        reset();
        setInfo(info);
        childs = new ArrayList<Timer>(0);
    }

    public Timer(Timer parent, String info) {
        this(info);
        if (parent != null)
            parent.childs.add(this);
    }

    final public void reset() {
        startTime = System.currentTimeMillis();
        endTime = 0;
        info = null;
        error = null;
    }

    final public long getStartTime() {
        return startTime;
    }

    final public long getEndTime() {
        return endTime;
    }

    final public String getInfo() {
        return info;
    }

    final public void setInfo(String info) {
        this.info = info;
    }

    final public void end(String info) {
        getDuration();
        if (info != null)
            setInfo(info);
    }

    final public long tempDuration() {
        return System.currentTimeMillis() - this.startTime;
    }

    final public long getDuration() {
        if (this.endTime == 0) {
            this.endTime = System.currentTimeMillis();
            for (Timer timer : childs)
                timer.getDuration();
        }
        return this.endTime - this.startTime;
    }

    final public long getStartOffset(final long offset) {
        return startTime + offset;
    }

    final public void setError(Exception exception) {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        exception.printStackTrace(pw);
        pw.close();
        try {
            sw.close();
        } catch (IOException e) {
            Logging.warn(e.getMessage(), e);
        }
        this.error = sw.toString();
    }

    final public String getError() {
        return this.error;
    }

    final public void writeXml(PrintWriter writer, int minTime, int maxLevel) {
        if (maxLevel == 0)
            return;
        if (maxLevel > 0)
            maxLevel--;
        long d = getDuration();
        if (d < minTime)
            return;
        writer.print("<timer info=\"");
        writer.print(StringEscapeUtils.escapeXml(info));
        writer.print("\" duration=\"");
        writer.print(d);
        writer.println("\">");
        for (Timer timer : childs)
            timer.writeXml(writer, minTime, maxLevel);
        writer.println("</timer>");
    }

}