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 import java.util.function.BiConsumer;
  17
  18
  19 /**
  20  * @author Tuukka Lehtonen
  21  */
  22 public final class TimingUtil {
  23
  24     public abstract static class NamedRunnable implements Runnable {
  25         String name;
  26         public NamedRunnable(String name) {
  27             this.name = name;
  28         }
  29         @Override
  30         public String toString() {
  31             return name;
  32         }
  33     }
  34
  35     public static class PrintCallback implements BiConsumer<Long, TimeUnit> {
  36         String task;
  37         PrintStream stream;
  38         PrintCallback(String task) {
  39             this(task, System.out);
  40         }
  41         PrintCallback(String task, PrintStream stream) {
  42             this.task = task;
  43             this.stream = stream;
  44         }
  45         @Override
  46         public void accept(Long arg1, TimeUnit arg2) {
  47             stream.println(task + " took " + arg1 + " " + arg2.toString());
  48         }
  49     };
  50
  51     public static void time(Runnable runnable) {
  52         time(runnable, System.out);
  53     }
  54
  55     public static void time(Runnable runnable, PrintStream stream) {
  56         time(runnable, TimeUnit.MILLISECONDS, new PrintCallback(runnable.toString(), stream));
  57     }
  58
  59     public static void time(Runnable runnable, TimeUnit reportTimeUnit, PrintStream stream) {
  60         time(runnable, reportTimeUnit, new PrintCallback(runnable.toString(), stream));
  61     }
  62
  63     public static void time(Runnable runnable, TimeUnit reportTimeUnit, BiConsumer<Long, TimeUnit> result) {
  64         long start = System.nanoTime();
  65         runnable.run();
  66         long end = System.nanoTime();
  67         result.accept(reportTimeUnit.convert(end-start, TimeUnit.NANOSECONDS), reportTimeUnit);
  68     }
  69
  70 }