Some thoughts about cache / distributed caching

[lalmeras]

Current status about cache / distributed caching:

• ehcache 2.x used as hibernate second level cache backend and spring cache backend
• infinispan integration (configuration) and a home-made wrapper to manage locks and message communication over infinispan

We already use hibernate + ehcache + jgroups to manage distributed cache eviction, but it is not integrated in igloo.

We may choose a strategy for the future:

• drop ehcache and use infinispan

  • infinispan provides hibernate caching module
  • infinispan is a JSR-107 (JCache) provider and spring can wrap JSR-107 providers
  • our current ehcache's usage are basics and may not be impacted by this move
  • we need to implement again cache management interface for hibernate and web-caches

• no changes:

  • ehcache as second level cache and spring backend and if we need distributed behavior:
    • switch caches to spring + infinispan JSR-107
    • configure ehcache + jgroups
  • infinispan triggered only for distributed behaviors