Starting a Java Persistence project InitialContext initialContext = (Best web design)
Starting a Java Persistence project InitialContext initialContext = new InitialContext(); // Look up the stateless MessageHandler EJB MessageHandler msgHandler = (MessageHandler) initialContext .lookup(”MessageHandlerBean/local”); // Call the stateless EJB msgHandler.saveMessages(); msgHandler.showMessages(); // Shut down EJB container EJB3StandaloneBootstrap.shutdown(); } } The first command in main() boots the server s kernel and deploys the base services found in the service configuration files. Next, the datasource factory configuration you created earlier in helloworld-beans.xml is deployed, and the datasource is bound to JNDI by the container. From that point on, the container is ready to deploy EJBs. The easiest (but often not the fastest) way to deploy all EJBs is to let the container search the whole classpath for any class that has an EJB annotation. To learn about the many other deployment options available, check the JBoss AS documentation bundled in the download. To look up an EJB, you need an InitialContext, which is your entry point for the JNDI registry. If you instantiate an InitialContext, Java automatically looks for the file jndi.properties on your classpath. You need to create this file in WORKDIR/ etc with settings that match the JBoss server s JNDI registry configuration: java.naming.factory.initial . org.jnp.interfaces.LocalOnlyContextFactory java.naming.factory.url.pkgs org.jboss.naming:org.jnp.interfaces You don t need to know exactly what this configuration means, but it basically points your InitialContext to a JNDI registry running in the local virtual machine (remote EJB client calls would require a JNDI service that supports remote communication). By default, you look up the MessageHandler bean by the name of an implementation class, with the /local suffix for a local interface. How EJBs are named, how they re bound to JNDI, and how you look them up varies and can be customized. These are the defaults for the JBoss server. Finally, you call the MessageHandler EJB and let it do all the work automatically in two units each method call will result in a separate transaction.
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