[
http://jira.jboss.com/jira/browse/JBAS-1579?page=comments#action_12316392 ]
Clebert Suconic commented on JBAS-1579:
---------------------------------------
I didn't know there is another testcase doing something to serialUIDs. When I
saw JBAS-1598 I understood I needed to verify serialUIDs.
Well... let's talk about the differences.
First difference:
I'm checking if every class into a given JAR has implemented serialUID.
I'm doing that by getField/introspection.
As it's a private field, I'm changing the property in the same way
ObjectOutputStream does:
Field field = parameterClass.getDeclaredField("serialVersionUID");
field.setAccessible(true);
Second difference:
If you add older versions in a configured directory (through a property in the
system... good option for cruisecontrol), I will check if all the older
versions also have serialUID defined.
Them I'm checking if both are the same.
Third difference:
If I have a default constructor, I'm serializing the Object using the older
versions in the configured directory.
I deserialize in the current version using ObjectInputStreamWithClassLoader.
Forth difference:
You will see every class tested as a TestResult. Fancy feature only
I'm attaching the sourcecode, as I will commit it after validated.
> Need to cleanup the serialVersionUIDs for Serializable/Externalizable classes
> -----------------------------------------------------------------------------
>
> Key: JBAS-1579
> URL: http://jira.jboss.com/jira/browse/JBAS-1579
> Project: JBoss Application Server
> Type: Bug
> Versions: JBossAS-4.0.2RC1, JBossAS-4.0.1 SP1
> Reporter: Scott M Stark
> Assignee: Clebert Suconic
> Priority: Blocker
> Fix For: JBossAS-4.0.2 Final
> Attachments: SerializableHasSerialVersionUIDField.zip, TestResultSample.zip
>
>
> I'm seeing incomptibilities between versions that are simply due to the fact
> that Serializable/Externalizable classes are letting their serialVersionUIDs
> float instead of explicitly defining them. We need to get this cleaned up.
> There should not be a single Serializable/Externalizable class that does not
> fix its serialVersionUID and then take responsibility for maintaining
> compatibility with the indicated version.
> The attached SerializableHasSerialVersionUIDField.zip unzips to create a
> SerializableHasSerialVersionUIDField-index.html and
> SerializableHasSerialVersionUIDField directory which is a report of all
> classes in the 4.0 codebase that are not defining a serialVersionUID as they
> should.
> The JDK object serialization spec defines all you need to know about the apis
> and contracts for object serialization:
> http://java.sun.com/j2se/1.4.2/docs/guide/serialization/spec/serialTOC.html
> In particular, Versioning of Serializable Objects:
> http://java.sun.com/j2se/1.4.2/docs/guide/serialization/spec/version.html#wp9419
> talks about binary compatibility and what is available to manage this.
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