Stopwatch is a debugging tool for manually profiling code execution
package com.dbxml.util;
/*
* dbXML - Native XML Database
* Copyright (C) 1999-2004 The dbXML Group, L.L.C.
*
* This program 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 2
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Id: Stopwatch.java,v 1.2 2004/02/12 00:17:58 bradford Exp $
*/
/**
* Stopwatch is a debugging tool for manually profiling code execution.
* This class will probably be removed for a production release.
*/
public final class Stopwatch {
private String label;
private long total = 0;
private long begin = 0;
private long end = 0;
public Stopwatch() {
}
public Stopwatch(boolean immediate) {
if ( immediate )
start();
}
public Stopwatch(String label) {
this.label = label;
}
public Stopwatch(String label, boolean immediate) {
this.label = label;
if ( immediate )
start();
}
public void start() {
begin = System.currentTimeMillis();
}
public long stop() {
end = System.currentTimeMillis();
total += (end - begin);
return total;
}
public void cancel() {
begin = 0;
end = 0;
}
public void reset() {
total = 0;
begin = 0;
end = 0;
}
public long elapsed() {
if ( end != 0 )
return end - begin;
else
return System.currentTimeMillis() - begin;
}
public long total() {
if ( end != 0 )
return total;
else
return (System.currentTimeMillis() - begin) + total;
}
public String toString() {
return toString(total());
}
public String toString(long t) {
StringBuffer sb = new StringBuffer();
if ( label != null )
sb.append(label + ": ");
long hour = t / 3600000;
if ( hour > 0 ) {
sb.append(hour + "h ");
t = t % 3600000;
}
long min = t / 60000;
if ( min > 0 ) {
sb.append(min + "m ");
t = t % 60000;
}
long sec = t / 1000;
if ( sec > 0 ) {
sb.append(sec + "s ");
t = t % 1000;
}
if ( t > 0 || total() == 0 )
sb.append(t + "ms");
return sb.toString();
}
}
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