[Jboss-dev-forums] [Design of JBossCache] - Re: [JBCACHE-669] Enable data gravitation for PojoCache inte

[<bst...@jb...>]

I want to clarify a bit the use of terms, 'cause "region" has too many meanings :-)

A 'subtree' is a portion of the cache that's rooted in a particular node.

A 'region' is a subtree for which special behaviors have been configured.  Currently these are either eviction or marshalling related.

We don't have 'region-based gravitation'.  We have 'subtree-based gravitation'.

For example, with HttpSession repl, the region would be:

/JSESSIONID/localhost/mywebapp

The thing that would be gravitated following failover would be a subtree such as:

/JSESSIONID/localhost/mywebapp/54321adfad98760**

In order to resolve the problem I'm seeing with shared objects and FIELD replication, there would have to be a /JSESSIONID/localhost/mywebapp/54321adfad98760**/_JBossInternal_ node -- having /JSESSIONID/localhost/mywebapp/_JBossInternal_ would not help, since that node would not be gravitated along with the rest of the session.

I don't see how PojoCache could know that /JSESSIONID/localhost/mywebapp/54321adfad98760**/ is an appropriate place to create a _JBossInternal_ node.  Only JBossCacheManager understands that that's a significant Fqn.

View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3953088#3953088

Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3953088