Re: [infinispan-dev] CassandraCacheStore

Dear all, I am new here and I (would like to) bring gifts :) First of all thanks for the great work you have been doing on Infinispan. I was introduced to Infinispan by Sanne, with whom I have collaborated in the past (hi Sanne!). Over the last few days I have been writing a CacheStore implementation for Apache Cassandra, but I have a few unanswered questions I would like to submit to you before I proceed. I have written my code by taking inspiration from other CacheStore providers, namely the JDBM and Hibernate stores. I hash the key of an entry to produce an appropriate key for Cassandra. I then store the marshalled value in a Column named "entry" within a ColumnFamily named "Infinispan". If the entry has an expiration I create another Column within the "Infinispan" ColumnFamily using the following pattern: "expiration"+"0paddedtimestamp" containg a placeholder value. When purgeInternal is invoked I delete all rows which have a column in the range "Infinispan:expiration0000000000000000" to "Infinispan:expiration0paddednowtimestamp".

I have noticed that the JDBM CacheStore keeps expiration entries in an internal LinkedHashMap: is that just for performance reasons ? Also, Cassandra doesn't support transactional operations, but merely batched operations: within the applyModifications() method I just send all operations in one batch invocation. Is this ok ? I guess that Infinispan manages the transactional side of things.

I am currently developing in my own private Subversion repository and using my own package name and Junit+mockito in place of testng+easymock. Would such an object be worthy of potential inclusion within Infinispan itself (and so should I refactor everything around the org.infinispan package and integrate nicely with the rest of the tree?). Should I submit a patch to the current Infinispan trunk ?