Entries in permissions cache

Question

Hi,
I am working with Weblogic server 6.1 sp1. The permissions cache size is set to
10007.
I want to find out the number of entries in the permissions cache. How do I get
the number of entries in permissions cache at any give time?

Answer 1

Hi Henry,
Simple approach
Alternatively you could use explicit partition locking. Lock whole partition, invoke entry processor, unlock whole partition (tip you can lock/unlock key even if there is not associated entry in key).
Complex approach
I in may days before Coherence, I were using following pattern.
Each entity has additional attributes for managing cross entry transactions.
1. Update one entry, but store transaction object (update details for both accounts) as additional attribute.
2. Update second entry, but keep transaction ID in list of commited transactions associated with entry.
3. Remove transaction object from first entry, storing transaction ID in list of completed transactions.
Have recovery process which in monitoring entries with associated uncommited transactions and roll forward uncommited transactions (you can use index to track transaction in process).
Then you applying transaction to entry, check first if this transaction ID already in commited list for that entry.
Simple put, you are keeping write-ahead-transaction log associated with each entry.
General implementation sounds complex but if you tailor it to your use case it may become much simpler.
* Few cavets, lists of commited transactions may grow. You may need clean them (removing transactions confirmed on all participating entries).
* Your transaction object should be deterministic.
* You still have to do with logical concurrency issues, this approach does not support rolling back (at least in simple way).
Haven't tryed it with Coherence yet :)
Regards,
Alexey