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7017458: (cal) Multithreaded deserialization of Calendar leads to Cla…
…ssCastException Reviewed-by: okutsu
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peytoia
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Jan 27, 2012
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/* | ||
* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. | ||
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
* | ||
* This code is free software; you can redistribute it and/or modify it | ||
* under the terms of the GNU General Public License version 2 only, as | ||
* published by the Free Software Foundation. | ||
* | ||
* This code is distributed in the hope that it will be useful, but WITHOUT | ||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
* version 2 for more details (a copy is included in the LICENSE file that | ||
* accompanied this code). | ||
* | ||
* You should have received a copy of the GNU General Public License version | ||
* 2 along with this work; if not, write to the Free Software Foundation, | ||
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
* | ||
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
* or visit www.oracle.com if you need additional information or have any | ||
* questions. | ||
*/ | ||
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/* | ||
* @test | ||
* @bug 7017458 | ||
* @summary Test of multithreaded serialization/deserialization of Calendar. | ||
*/ | ||
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import java.io.*; | ||
import java.util.Calendar; | ||
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public class Bug7017458 { | ||
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static volatile boolean err = false; | ||
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public static void main(String[] args) { | ||
try { | ||
new Bug7017458().perform(); | ||
} | ||
catch (Exception e) { | ||
e.printStackTrace(); | ||
err = true; | ||
} | ||
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if (err) { | ||
throw new RuntimeException("Multithreaded serialization/deserialization test failed."); | ||
} else { | ||
System.out.println("Multithreaded serialization/deserialization test passed."); | ||
} | ||
} | ||
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public void perform() throws Exception { | ||
int nbThreads = 8; | ||
Calendar cal = Calendar.getInstance(); | ||
SerializationThread[] threads = new SerializationThread[nbThreads]; | ||
for (int i = 0; i < nbThreads; i++) { | ||
threads[i] = new SerializationThread(cal); | ||
} | ||
for (int i = 0; i < nbThreads; i++) { | ||
threads[i].start(); | ||
} | ||
for (int i = 0; i < nbThreads; i++) { | ||
threads[i].join(); | ||
} | ||
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DeserializationThread[] threads2 = new DeserializationThread[nbThreads]; | ||
for (int i = 0; i < nbThreads; i++) { | ||
threads2[i] = new DeserializationThread(threads[i].data); | ||
} | ||
for (int i = 0; i < nbThreads; i++) { | ||
threads2[i].start(); | ||
} | ||
for (int i = 0; i < nbThreads; i++) { | ||
threads2[i].join(); | ||
} | ||
} | ||
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public class SerializationThread extends Thread { | ||
private Calendar cal; | ||
public byte[] data; | ||
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public SerializationThread(Calendar cal) { | ||
this.cal = cal; | ||
} | ||
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public void run() { | ||
try { | ||
ByteArrayOutputStream baos = new ByteArrayOutputStream(); | ||
ObjectOutputStream oos = new ObjectOutputStream(baos); | ||
oos.writeObject(cal); | ||
oos.flush(); | ||
oos.close(); | ||
data = baos.toByteArray(); | ||
} | ||
catch (Exception e) { | ||
e.printStackTrace(); | ||
err = true; | ||
} | ||
} | ||
} | ||
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public class DeserializationThread extends Thread { | ||
public Calendar cal; | ||
public byte[] data; | ||
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public DeserializationThread(byte[] data) { | ||
this.data = data; | ||
} | ||
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public void run() { | ||
try { | ||
ByteArrayInputStream bais = new ByteArrayInputStream(data); | ||
ObjectInputStream ois = new ObjectInputStream(bais); | ||
cal = (Calendar) ois.readObject(); | ||
ois.close(); | ||
} | ||
catch (Exception e) { | ||
e.printStackTrace(); | ||
err = true; | ||
} | ||
} | ||
} | ||
} | ||
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