1 /*

     2  * Copyright (c) 2009, 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 import java.net.MalformedURLException;

    25 import java.net.URL;

    26 

    27 public class Starter implements Runnable {

    28 

    29     private String id;

    30     private DelegatingLoader dl;

    31     private String startClass;

    32 

    33     private static DelegatingLoader saLoader, sbLoader;

    34 

    35     public static void log(String line) {

    36         System.out.println(line);

    37     }

    38 

    39     public static void main(String[] args) {

    40         URL[] urlsa = new URL[1];

    41         URL[] urlsb = new URL[1];

    42         try {

    43             String testDir = System.getProperty("test.classes", ".");

    44             String sep = System.getProperty("file.separator");

    45             urlsa[0] = new URL("file://" + testDir + sep + "SA" + sep);

    46             urlsb[0] = new URL("file://" + testDir + sep + "SB" + sep);

    47         } catch (MalformedURLException e) {

    48             e.printStackTrace();

    49         }

    50         // Set up Classloader delegation hierarchy

    51         saLoader = new DelegatingLoader(urlsa);

    52         sbLoader = new DelegatingLoader(urlsb);

    53 

    54         String[] saClasses = { "comSA.SupBob", "comSA.Alice" };

    55         String[] sbClasses = { "comSB.SupAlice", "comSB.Bob" };

    56 

    57         saLoader.setDelegate(sbClasses, sbLoader);

    58         sbLoader.setDelegate(saClasses, saLoader);

    59 

    60         // test one-way delegate

    61         String testType = args[0];

    62         if (testType.equals("one-way")) {

    63             test("comSA.Alice", "comSA.SupBob");

    64         } else if (testType.equals("cross")) {

    65             // test cross delegate

    66             test("comSA.Alice", "comSB.Bob");

    67         } else {

    68             System.out.println("ERROR: unsupported - " + testType);

    69         }

    70     }

    71 

    72     private static void test(String clsForSA, String clsForSB) {

    73         Starter ia = new Starter("SA", saLoader, clsForSA);

    74         Starter ib = new Starter("SB", sbLoader, clsForSB);

    75         new Thread(ia).start();

    76         new Thread(ib).start();

    77     }

    78 

    79     public static void sleep() {

    80         try {

    81             Thread.sleep(500);

    82         } catch (InterruptedException e) {

    83             e.printStackTrace();

    84             log("Thread interrupted");

    85         }

    86     }

    87 

    88     private Starter(String id, DelegatingLoader dl, String startClass) {

    89         this.id = id;

    90         this.dl = dl;

    91         this.startClass = startClass;

    92     }

    93 

    94     public void run() {

    95         log("Spawned thread " + id + " running");

    96         try {

    97             // To mirror the WAS deadlock, need to ensure class load

    98             // is routed via the VM.

    99             Class.forName(startClass, true, dl);

   100         } catch (ClassNotFoundException e) {

   101             e.printStackTrace();

   102         }

   103         log("Thread " + id + " terminating");

   104     }

   105 }