bundles/org.simantics.utils.thread/src/org/simantics/utils/threads/logger/ThreadLogger.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.threads.logger;
  13
  14 import java.io.DataOutput;
  15 import java.io.DataOutputStream;
  16 import java.io.FileNotFoundException;
  17 import java.io.FileOutputStream;
  18 import java.io.IOException;
  19
  20 public class ThreadLogger implements IThreadLogger {
  21
  22     final private static ITask DUMMY = () -> {};
  23
  24     public static String LOG_FILE = "threads.log";
  25
  26     public static boolean LOG = false;
  27
  28     static Object loggerCreationLock = new Object();
  29     static ThreadLogger logger = null;
  30
  31     DataOutput log;
  32
  33     public ThreadLogger() {
  34         if(LOG) {
  35             try {
  36                 FileOutputStream stream = new FileOutputStream(LOG_FILE);
  37                 log = new DataOutputStream(stream);
  38             } catch (FileNotFoundException e) {
  39                 e.printStackTrace();
  40             }
  41         }
  42     }
  43
  44     public static ThreadLogger getInstance() {
  45         if(logger == null) {
  46             synchronized (loggerCreationLock) {
  47                 if(logger == null)
  48                     logger = new ThreadLogger();
  49             }
  50         }
  51         return logger;
  52     }
  53
  54     public class Task implements ITask {
  55
  56         String name;
  57         long beginTime;
  58         long endTime;
  59         long threadId;
  60
  61         public Task(String name) {
  62             this.name = name;
  63             this.threadId = Thread.currentThread().getId();
  64             this.beginTime = System.nanoTime();
  65         }
  66
  67         @Override
  68         public void finish() {
  69             this.endTime = System.nanoTime();
  70             if(LOG && log != null) {
  71
  72                 try {
  73                     synchronized(log) {
  74                         log.writeUTF(name);
  75                         log.writeLong(threadId);
  76                         log.writeLong(beginTime);
  77                         log.writeLong(endTime);
  78                     }
  79                 } catch(IOException e) {
  80                     e.printStackTrace();
  81                 }
  82
  83             }
  84         }
  85
  86     }
  87
  88     @Override
  89     public ITask begin(String taskName) {
  90         return new Task(taskName);
  91     }
  92
  93     final public static ITask task(Object taskName) {
  94         if(LOG)
  95             return getInstance().begin(taskName.toString());
  96         else
  97             return DUMMY;
  98     }
  99
 100 }