Clustering web applications

Clustering web applications requires the least effort. As we touched upon earlier, all you need to do to switch on clustering in a web application is add the following directive in the web.xml:

<web-app>
    <distributable/>
</web-app>

By default, clustered web applications will use the web cache contained in the Infinispan configuration. You also have the option of setting up a specific cache per deployment unit. This can be achieved by adding the replication-config directive to the jboss-web.xml file and specifying the cache name to use:

<jboss-web>
  <replication-config>
     <cache-name>web.dist</cache-name>
  </replication-config>
</jboss-web>

The previous configuration should obviously reference a cache defined in the main configuration file:

<cache-container name="web" default-cache="repl">
   <alias>standard-session-cache</alias>

   <distributed-cache mode="ASYNC" name="web.dist" batching...