Use servlet cache instances

Perform this task so that the application can access dynamic cache servlet cache instances. Using servlet cache instances can improve the performance of the application because we can store the output and the side effects of an invoked servlet. Servlet cache instances also give you the necessary control over the cache for multiple applications running in an application server. Refer to the Cache instances topic for more information.

Before beginning this task, enable the dynamic cache service.

Tasks

1. Enable servlet caching. Refer to the Configuring servlet caching topic for more information.

2. Configure one or more cache instances.

   1. In the administrative console, click...
      Resources > Cache instances > Servlet cache instances

   2. Specify the scope of the cache instance. Specify a scope of cell to make the cache instance available to all the servers in the cell. Node scope makes the cache instance available to all servers in a node. Server scope makes the cache instance available to the selected server only. If necessary, we can mix the scopes.

      We cannot create cache instances (object or servlet) at different scopes with the same cache name or JNDI name.

   3. Click Apply to save the scope.

   4. Specify the settings for the cache instance. The Name and Java Naming and Directory interface (JNDI) name fields are required. The JNDI name is the name attribute specified in the <cache-instance> element in the cachepec.xml file. An example of a JNDI name specified in the cachespec.xml file follows:
      <cache-instance name="services/cache/instance_one">

      In this example, specify services/cache/instance_one as the JNDI name.

3. Update the application. To use a servlet cache instance, specify a <cache-instance> element that has a name that is equal to the JNDI Name for this cache instance.

Subtopics

• Invalidating entries in a servlet cache
  
• Servlet cache instance collection
  
• Servlet cache instance settings
  
• Use the DynamicContentProvider interface for dynamic cache
  

Related:

Cache instances

Invalidating entries in a servlet cache

Use object cache instances

Use the dynamic cache service

Configure servlet caching