| /* |
| * 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.net4j.util.tests; |
| |
| 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); |
| } |
| } |
| } |