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     public static String LOG_FILE = "d:\\threads.log";
  23
  24     public static boolean LOG = false;
  25
  26     static Object loggerCreationLock = new Object();
  27     static ThreadLogger logger = null;
  28
  29     DataOutput log;
  30
  31     public ThreadLogger() {
  32         if(LOG) {
  33             try {
  34                 FileOutputStream stream = new FileOutputStream(LOG_FILE);
  35                 log = new DataOutputStream(stream);
  36             } catch (FileNotFoundException e) {
  37                 e.printStackTrace();
  38             }
  39         }
  40     }
  41
  42     public static ThreadLogger getInstance() {
  43         if(logger == null) {
  44             synchronized (loggerCreationLock) {
  45                 if(logger == null)
  46                     logger = new ThreadLogger();
  47             }
  48         }
  49         return logger;
  50     }
  51
  52     public class Task implements ITask {
  53
  54         String name;
  55         long beginTime;
  56         long endTime;
  57         long threadId;
  58
  59         public Task(String name) {
  60             this.name = name;
  61             this.threadId = Thread.currentThread().getId();
  62             this.beginTime = System.nanoTime();
  63         }
  64
  65         @Override
  66         public void finish() {
  67             this.endTime = System.nanoTime();
  68             if(LOG && log != null) {
  69
  70                 try {
  71                     synchronized(log) {
  72                         log.writeUTF(name);
  73                         log.writeLong(threadId);
  74                         log.writeLong(beginTime);
  75                         log.writeLong(endTime);
  76                     }
  77                 } catch(IOException e) {
  78                     e.printStackTrace();
  79                 }
  80
  81             }
  82         }
  83
  84     }
  85
  86     @Override
  87     public ITask begin(String taskName) {
  88         return new Task(taskName);
  89     }
  90
  91 }