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);

   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);

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10.3.2. Programmatic Configuration

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