Oracle ATG Web Commerce includes a JMS-based system for explicitly invalidating caches in an SQL repository, where Oracle ATG Web Commerce servers in a cache invalidation cluster act as message sinks and sources. Cache invalidation messages are initially created by invoking a client method remotely via RMI to a specific server. All servers in the cluster, configured as message sinks or subscribers to the GSA Invalidation topic, accept the message and perform the appropriate cache invalidation as specified by message parameters.

You can specify several levels of cache invalidation:

The Cache Invalidator can be used in two different ways: