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/*
* Copyright (c) 2012 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.emf.cdo.tests.util;
import java.util.concurrent.Callable;
import java.util.concurrent.TimeUnit;
/**
* @author Eike Stepper
*/
public class Timer
{
private long sum;
private long start;
public Timer()
{
start();
}
public void start()
{
start = System.nanoTime();
}
public void stop()
{
if (start > 0)
{
long nanos = System.nanoTime() - start;
sum += nanos;
start = 0;
}
}
public void done()
{
done(TimeUnit.NANOSECONDS);
}
public void done(TimeUnit timeUnit)
{
stop();
long converted = timeUnit.convert(sum, TimeUnit.NANOSECONDS);
System.out.println(converted);
}
public static <T> T execute(Callable<T> callable) throws Exception
{
return execute(TimeUnit.NANOSECONDS, callable);
}
public static <T> T execute(TimeUnit timeUnit, Callable<T> callable) throws Exception
{
Timer timer = new Timer();
try
{
return callable.call();
}
finally
{
timer.done(timeUnit);
}
}
}
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