1 /*
   2  * Copyright (c) 2000, 2002, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /* Utility class for test threads
  25  *
  26  */
  27 
  28 import java.io.*;
  29 
  30 
  31 public abstract class TestThread
  32     extends Thread
  33 {
  34     Exception failure = null;
  35     String name;
  36     protected final PrintStream log;
  37     Thread main;
  38 
  39     TestThread(String name, PrintStream log) {
  40         super("TestThread-" + name);
  41         this.name = name;
  42         this.log = log;
  43         this.main = Thread.currentThread();
  44         setDaemon(true);
  45     }
  46 
  47     TestThread(String name) {
  48         this(name, System.err);
  49     }
  50 
  51     abstract void go() throws Exception;
  52 
  53     public void run() {
  54         try {
  55             go();
  56         } catch (Exception x) {
  57             failure = x;
  58             main.interrupt();
  59         }
  60     }
  61 
  62     int finish(long timeout) {
  63         try {
  64             join(timeout);
  65         } catch (InterruptedException x) { }
  66         if (isAlive() && (failure == null))
  67             failure = new Exception(name + ": Timed out");
  68         if (failure != null) {
  69             failure.printStackTrace(log);
  70             return 0;
  71         }
  72         return 1;
  73     }
  74 
  75     void finishAndThrow(long timeout) throws Exception {
  76         try {
  77             join(timeout);
  78         } catch (InterruptedException x) { }
  79         if (failure != null)
  80             failure = new Exception(name + " threw an exception",
  81                                     failure);
  82         if (isAlive() && (failure == null))
  83             failure = new Exception(name + " timed out");
  84         if (failure != null)
  85             throw failure;
  86     }
  87 
  88     public String toString() {
  89         return name;
  90     }
  91 
  92 }