Verify that you can do
FileOutputStream fos = new FileOutputStream(...);
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeInt(1);
oos.close();
in the same application using the same File and FileOutputStream.
-W
On 09/07/2012, chrisLi <[email protected]> wrote:
> Hi, all
>
> I am trying to serialize a StatefulKnowledgeSession into a file as a
> snapshot. But I got the following error:
>
> java.io.IOException: Write error
> at java.io.FileOutputStream.writeBytes(Native Method)
> at java.io.FileOutputStream.write(FileOutputStream.java:282)
> at
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
> at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
> at
> java.io.ObjectOutputStream$BlockDataOutputStream.flush(ObjectOutputStream.java:1793)
> at java.io.ObjectOutputStream.flush(ObjectOutputStream.java:699)
> at java.io.ObjectOutputStream.close(ObjectOutputStream.java:720)
> at com.sample.test.EventDataConsumer.run(EventDataConsumer.java:44)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
>
> However, when I serialized it to a ByteArrayOutputStream, it works
> well.
>
> I wrapped the stateful session in a class as a field. And I wrote
> writeObject and readObject methods in this class to provide custom
> serializing behaviour. The code is as follows:
>
> private void writeObject(ObjectOutputStream out) throws IOException {
> System.out.println("writing");
> out.defaultWriteObject();
>
> DroolsObjectOutputStream droolsOut = new
> DroolsObjectOutputStream(
> (OutputStream) out);
> droolsOut.writeObject(knowledgeBase);
>
> Marshaller marshaller =
> createSerializableMarshaller(knowledgeBase);
> marshaller.marshall(droolsOut, session);
> System.out.println("written");
> }
>
> private void readObject(ObjectInputStream in) throws IOException,
> ClassNotFoundException {
> System.out.println("read");
> in.defaultReadObject();
>
> DroolsObjectInputStream droolsIn = new DroolsObjectInputStream(
> (InputStream) in);
> this.knowledgeBase = (KnowledgeBase) droolsIn.readObject();
>
> Marshaller marshaller =
> createSerializableMarshaller(knowledgeBase);
> session = marshaller.unmarshall(droolsIn);
> }
>
> private Marshaller createSerializableMarshaller(KnowledgeBase
> knowledgeBase) {
> ObjectMarshallingStrategyAcceptor acceptor = MarshallerFactory
> .newClassFilterAcceptor(new String[] { "*.*" });
> ObjectMarshallingStrategy strategy = MarshallerFactory
> .newSerializeMarshallingStrategy(acceptor);
> Marshaller marshaller =
> MarshallerFactory.newMarshaller(knowledgeBase,
> new ObjectMarshallingStrategy[] { strategy });
> return marshaller;
> }
>
> Out of this class, I utilized the ordinary ObjectoutputStream to serialize
> an instance of this class to a file.
>
> Unfortunately, I got the Exception.
>
> Any idea or response will be appreciated, Thank you very much.
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Write-Error-when-Serializing-a-stateful-session-to-a-file-tp4018545.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> [email protected]
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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