[jboss-dev-forums] [Design of JBossCache] - Re: Node removal not working with Invalidation?

[bstansberry@jboss.com]

Agreed; if leaving tombstones around on remote nodes makes sense, it makes sense to do it locally as well.

I was trying to think how this could break things; e.g. app removes some data and then tries to recreate it. Say an admin creates a "user" account entity; realizes he's mucked it up, deletes it and starts over with the same id. He could get version conflicts when he starts over.

But:

1) With the present approach of tombstones on remote nodes, that problem already exists, if the admin happens to work on a different node when he starts over.

2) If implicit data versioning is used, it wouldn't be a problem.

3) If explicit data versioning is used, it could be a problem. But perhaps that can be handled in the Hibernate/JBC integration, which separately handles cache insertions of newly created entities.

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