10.3.2. Programmatic Configuration
Configuring eviction using the
Configuration
object entails the use of the org.jboss.cache.config.EvictionConfig
bean, which is passed into Configuration.setEvictionConfig()
. See the Chapter 3, Configuration for more on building a Configuration
programmatically.
The use of simple POJO beans to represent all elements in a cache's configuration also makes it fairly easy to programmatically add eviction regions after the cache is started. For example, assume we had an existing cache configured via XML with the EvictionConfig element shown above. Now at runtime we wished to add a new eviction region named "/org/jboss/fifo", using
LRUAlgorithm
but a different number of maxNodes
:
Fqn fqn = Fqn.fromString("/org/jboss/fifo"); // Create a configuration for an LRUPolicy LRUAlgorithmConfig lruc = new LRUAlgorithmConfig(); lruc.setMaxNodes(10000); // Create an eviction region config EvictionRegionConfig erc = new EvictionRegionConfig(fqn, lruc); // Create the region and set the config Region region = cache.getRegion(fqn, true); region.setEvictionRegionConfig(erc);