Indexing technique in Ehcache

Question

I just went to almost all the documentation of ehcache. They are using indexes to perform queries in cache. What they didn't mentioned is what technique they are using?

Also I want to use EHcache as a cache store and create index on that cache with lucene. Does anyone know how to do that i already did an exhaustive search but didn't find anything is it even possible to with EHcache?

Answer 1

Ehcache has different types of storage. If you refer to the most commonly used one (MemoryStore), it uses SelectableConcurrentHashMap which is a somewhat customized version of ConcurrentHashMap. Just to be clear, this is completely different from how Lucene works.

If you want to Lucene-index your cache entries, one of the ways of doing that would be implementing CacheEventListener and calling relevant Lucene APIs on each cache event (remove, put, expired, etc.).