[jboss-dev-forums] [Design of JBossCache] - Re: Optimistic locking doesn't scale well with large 'flat'

[manik.surtani@jboss.com]

Listeners may not be necessary - the WorkspaceNodeImpl could do something like:

1)  Load child nodes lazily.  I.e., when the base node is loaded into the workspace, don't load child map.

2)  Changes made to child node map maintained as a delta in the workspace (e.g., adds, modifications, removes) with lazy loading of children.

3)  trying to get a child node will cache a null in the workspace if the child node doesn't exist - to maintain repeatable_read

4)  Merge back changes on commit time.

The drawback here is that it allows for s slight difference in semantics from pessimistic locking, due to the lazy locking (copying into workspace) of children ... 

Is this approach workable?

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