Re: serialVersionUID

[Brill Pappin]

Nice.



- Brill Pappin





On 12-Apr-09, at 12:51 AM, Luther Baker wrote:

I think thats actually more important than we've been giving it credit for in this thread!

I don't know much about it ... but would something like Terracotta

normal, singly homed deployments?

I think I understand that it helps confirm or explicitly 'version'

automatically and, unless I want an older version to work with a newer
version, I am fine just letting that happen.


explicitly - every time I make a relevant, corresponding change to the
containing class) - I'm not really gaining any functionality that the


-Luther


On Sat, Apr 11, 2009 at 10:56 PM, Adriano dos Santos Fernandes <
adrian...@uol.com.br> wrote:

use/require/leverage the serialVersionUID for something not so obvious in components that might be working together or across, say, JVM boundaries - but it seems like, if not explicitly provided, a default value is built In fact, unless I am really abiding by serialVersionUID rules (changing it runtime can't already do. In fact, unless rigorously maintained, it seems I could likely end up with two different compiled versions with identical, explicit serialVersionUIDs - which surely seems worse then leaving it alone?

Brill Pappin wrote:

Actually i don't think a missing one will cause that to fail unless there

are a  lot of incompatible changes.

Just one incompatible change of class stored in the session and it will not

be deserialized.

However... even if it does matter, *in no way* should anyone depend on a serialized session to store data.... if your app can't recover from a clean

session, you have bigger problems than not adding a serialVersionId.

Hum? What about stateful pages, which is the Wicket "market"?


just the inclusion of one field and it will change making the
deserialization fail.



Adriano



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If you can control your serial IDs, you have the chance of write custom deserializers. That does not means you can't with an absent ID, but AFAIU

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