Month: November 2010

Previously I’ve just mentioned that I am working on JbossCache deployed to glassfish. I want to have it distributed. My frustration was I couldn’t find any configuration file online of replication mode. It turned out that example configuration was inside JBoss Cache zip file, Core Edition version 3.2.5 “Malagueta” (download full zip jbosscache-core-3.2.5.GA-all.zip) in file jbosscache-core-3.2.5.GA\etc\config-samples\total-replication.xml.

• remember to put your configuration-cache.xml in WEB-INF/classes
• I’ve changed they way of communication from sync to async. (should be faster)
• upload 7 jar to your AS and restart: commons-logging.jar, jbosscache-core.jar, jboss-common-core.jar, jboss-logging-spi.jar, jboss-transaction-api.jar, jcip-annotations.jar, jgroups.jar

After loading 7jars to domain/libs and restarting Glassfish I was able to deploy web application with one class: JbossCacheActivatorServletContextListener

public class JbossCacheActivatorServletContextListener implements ServletContextListener {

    private Cache cache = null;

    public void contextInitialized(ServletContextEvent sce) {
        try {
            CacheFactory factory = new DefaultCacheFactory();
            cache = factory.createCache("cache-configuration.xml");
            InitialContext ctx = new InitialContext();
            ctx.bind("JBossCacheRef", cache);
        } catch (NamingException ex) {
            Logger.getLogger(JbossCacheActivatorServletContextListener.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public void contextDestroyed(ServletContextEvent sce) {
        try {
            InitialContext ctx = new InitialContext();
            ctx.unbind("JBossCacheRef");
            cache.stop();
        } catch (NamingException ex) {
            Logger.getLogger(JbossCacheActivatorServletContextListener.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

after all if there is cache instance. You can login to jconsole localhost:8686 and look for (ObjectName jboss.cache) it under MBeans node.

Testing.

1. I run cache on two separate Glassfish AS. They are in the same network (same mask; I am sure it works either in opposite condition but it will need more configuration).
2. I’ve coded two ejb’s as with @WebService annotation, one i puting into cache and second is reading from it.
3. I’ve turned off one node and put something into second one cache. I check for content… is ok. Then I start first node and check… and content is being replicated from the second what makes it work perfect.

Attention.

In jboss cache user guide guys from jboss cache suggest to register it into JMX (5.4.2. Registering the CacheJmxWrapper with the MBeanServer). As you can see I put referance to cache into InitialContext. That is why becasue I could not get into jbosscache trought the jmx mbeans cuz Glassfished sets a different ObjectName for this object, so I’ve got problems with finding it.