Java™ Application Development on Linux - Dator

512Chapter 23Deploying EJBsExample 23.5 Locating the home interface//Look up home interfaceInitialContext initctxt = new InitialContext();Object obj = initctxt.lookup("ejb/Money");MoneyHome homer = (MoneyHome) PortableRemoteObject.narrow(obj, MoneyHome.class);We’re putting this code in the init() method of a servlet; it could alsobe in a test program, or in a JSP. It needs to happen only once for our servlet(which is why we put it in the init() method) and then the connection canbe used many times, once for each contact with the bean.We get to the actual bean this way:Money mrbean;mrbean = homer.create();We then use the bean, making the calls on its remote interface (a Moneyobject, that extends EJBObject) as if it were just a simple method call on anordinary class:car = mrbean.save(20000.00, 0.04, 250.00);The math is done in the actual SessionBean, out there in the network,and the results are sent back to this application. Our application goes on todisplay this number as part of an HTML page.Then when we’re done with the bean, we need to clean up:mrbean.remove();23.2.3 Packaging the ServletWe will now package up the servlet, along with a simple startup page to invokeit. We’ll look at the WAR file and see how it’s built.23.2.3.1 What Is in the WAR FileThe other JAR-like file in the EAR is the WAR file. Let’s see what is in one ofthose (Table 23.3).Notice that the WAR file puts its XML descriptor not in the META-INFdirectory but in a WEB-INF directory along with the classes.