bundles/org.simantics.utils.datastructures/src/org/simantics/utils/datastructures/TimingUtil.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.utils.datastructures;
  13
  14 import java.io.PrintStream;
  15 import java.util.concurrent.TimeUnit;
  16
  17
  18 /**
  19  * @author Tuukka Lehtonen
  20  */
  21 public final class TimingUtil {
  22
  23     public abstract static class NamedRunnable implements Runnable {
  24         String name;
  25         public NamedRunnable(String name) {
  26             this.name = name;
  27         }
  28         @Override
  29         public String toString() {
  30             return name;
  31         }
  32     }
  33
  34     public static class PrintCallback implements BinaryCallback<Long, TimeUnit> {
  35         String task;
  36         PrintStream stream;
  37         PrintCallback(String task) {
  38             this(task, System.out);
  39         }
  40         PrintCallback(String task, PrintStream stream) {
  41             this.task = task;
  42             this.stream = stream;
  43         }
  44         @Override
  45         public void run(Long arg1, TimeUnit arg2) {
  46             stream.println(task + " took " + arg1 + " " + arg2.toString());
  47         }
  48     };
  49
  50     public static void time(Runnable runnable) {
  51         time(runnable, System.out);
  52     }
  53
  54     public static void time(Runnable runnable, PrintStream stream) {
  55         time(runnable, TimeUnit.MILLISECONDS, new PrintCallback(runnable.toString(), stream));
  56     }
  57
  58     public static void time(Runnable runnable, TimeUnit reportTimeUnit, PrintStream stream) {
  59         time(runnable, reportTimeUnit, new PrintCallback(runnable.toString(), stream));
  60     }
  61
  62     public static void time(Runnable runnable, TimeUnit reportTimeUnit, BinaryCallback<Long, TimeUnit> result) {
  63         long start = System.nanoTime();
  64         runnable.run();
  65         long end = System.nanoTime();
  66         result.run(reportTimeUnit.convert(end-start, TimeUnit.NANOSECONDS), reportTimeUnit);
  67     }
  68
  69 }