[jboss-dev-forums] [Design of JBossCache] - CacheListener events for state transfer marshalling

[bstansberry@jboss.com]

There's no CacheListener event generated before a node is about to be marshalled for state transfer.

Use case for this is EJB3 SFSB, where we are storing a bean context in the cache. EJB3 spec says we should invoke any prePassivate/postActivate callbacks the bean declares when we serialize/deserialize. These callbacks allow the bean to clean up it's state.

There are 3 types of serialization involved: replication, serialization to disk as part of eviction/passivation, and state transfer. The first is easy for the EJB3/JBC integration layer, as it causes the replication. The second we handle during the CacheListener callbacks.  But we have no hook to handle the third.

This is kind of a specialized case, but then again maybe not. We have events for all the other significant stuff that happens to a node, except this one.

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