1 /*

     2  * Copyright (c) 2012, 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 /*

    25  * @test

    26  * @bug 7017458

    27  * @summary Test of multithreaded serialization/deserialization of Calendar.

    28  */

    29 

    30 import java.io.*;

    31 import java.util.Calendar;

    32 

    33 public class Bug7017458 {

    34 

    35     static volatile boolean err = false;

    36 

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

    38         try {

    39             new Bug7017458().perform();

    40         }

    41         catch (Exception e) {

    42             e.printStackTrace();

    43             err = true;

    44         }

    45 

    46         if (err) {

    47             throw new RuntimeException("Multithreaded serialization/deserialization test failed.");

    48         } else {

    49             System.out.println("Multithreaded serialization/deserialization test passed.");

    50         }

    51     }

    52 

    53     public void perform() throws Exception {

    54         int nbThreads = 8;

    55         Calendar cal = Calendar.getInstance();

    56         SerializationThread[] threads = new SerializationThread[nbThreads];

    57         for (int i = 0; i < nbThreads; i++) {

    58             threads[i] = new SerializationThread(cal);

    59         }

    60         for (int i = 0; i < nbThreads; i++) {

    61             threads[i].start();

    62         }

    63         for (int i = 0; i < nbThreads; i++) {

    64             threads[i].join();

    65         }

    66 

    67         DeserializationThread[] threads2 = new DeserializationThread[nbThreads];

    68         for (int i = 0; i < nbThreads; i++) {

    69             threads2[i] = new DeserializationThread(threads[i].data);

    70         }

    71         for (int i = 0; i < nbThreads; i++) {

    72             threads2[i].start();

    73         }

    74         for (int i = 0; i < nbThreads; i++) {

    75             threads2[i].join();

    76         }

    77     }

    78 

    79     public class SerializationThread extends Thread {

    80         private Calendar cal;

    81         public byte[] data;

    82 

    83         public SerializationThread(Calendar cal) {

    84             this.cal = cal;

    85         }

    86 

    87         public void run() {

    88             try {

    89                 ByteArrayOutputStream baos = new ByteArrayOutputStream();

    90                 ObjectOutputStream oos = new ObjectOutputStream(baos);

    91                 oos.writeObject(cal);

    92                 oos.flush();

    93                 oos.close();

    94                 data = baos.toByteArray();

    95                 }

    96             catch (Exception e) {

    97                 e.printStackTrace();

    98                 err = true;

    99             }

   100         }

   101     }

   102 

   103     public class DeserializationThread extends Thread {

   104         public Calendar cal;

   105         public byte[] data;

   106 

   107         public DeserializationThread(byte[] data) {

   108             this.data = data;

   109         }

   110 

   111         public void run() {

   112             try {

   113                 ByteArrayInputStream bais = new ByteArrayInputStream(data);

   114                 ObjectInputStream ois = new ObjectInputStream(bais);

   115                 cal = (Calendar) ois.readObject();

   116                 ois.close();

   117             }

   118             catch (Exception e) {

   119                 e.printStackTrace();

   120                 err = true;

   121             }

   122         }

   123     }

   124 }

   125