profiler.java

POS is a Java&#174 platform-based, mission-critical, ISO-8583 based financial transaction library/fr

/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2008 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.util;

import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

/**
 * Simple Profiler
 * @author Alejandro P. Revilla
 * @version $Id: Profiler.java 2594 2008-01-22 16:41:31Z apr $
 */
public class Profiler implements Loggeable {
    long start, parcial;
    Collection events;
    public Profiler () {
        super();
        reset();
    }
    /**
     * reset timers
     */
    public void reset() {
        start = parcial = System.currentTimeMillis();
        events = new ArrayList();
    }
    /**
     * mark checkpoint
     * @param detail checkpoint information
     */
    public synchronized void checkPoint (String detail) {
        long now = System.currentTimeMillis();
        StringBuffer sb = new StringBuffer (detail);
        sb.append (" [");
        sb.append (Long.toString (now - parcial));
        sb.append ('/');
        sb.append (Long.toString (now - start));
        sb.append (']');
        events.add (sb.toString());
        parcial = now;
    }
    /**
     * @return total elapsed time since last reset
     */
    public long getElapsed() {
        return System.currentTimeMillis() - start;
    }
    /**
     * @return parcial elapsed time since last reset
     */
    public long getParcial() {
        return System.currentTimeMillis() - parcial;
    }
    public void dump (PrintStream p, String indent) {
        String inner = indent + "  ";
        parcial = start;
        checkPoint ("end");
        Iterator iter = events.iterator();
        p.println (indent + "<profiler>");
        while (iter.hasNext()) 
            p.println (inner + (String) iter.next());

        p.println (indent + "</profiler>");
    }
}