<p> layer is completely independent and distinct.</p><p> clients and servers are very loosely coupled. You need infrastructure to accommodate messaging.</p><p>SOA and Web Services</p><p> demands or when they are required to support new customers and their IT systems.</p><p>(enterprise beans) can perform any of the following tasks:</p><p> interface. This scenario is shown in Figure 1.4.</p><p> operational solution. The system administrator is responsible for the upkeep and monitoring of</p><p>J2EE stack consists of the following:</p><p>EJB is the cornerstone for J2EE and uses several other J2EE technologies.</p><p> better suited to handling simple request/response needs, and they do not require sophisticated</p><p> lookup in a service-oriented architecture as supported by Web Services technologies.</p><p>}</p><p> archive’s META-INF directory. Your specific J2EE product may</p><p> functionally equivalent. Actually, there is a third option that relies on a dynamic invocation</p><p>// Call the hello() method</p><p>This is shown in Figure 6.1.</p><p> significant.</p><p>¦¦ Persistable, so that it can be saved back into storage again, thus updating the database data</p><p> instances needs to be refreshed depending on the current transactional state (see Chapter 12).</p><p> method should</p><p> method after activation. This is shown in Figure 6.5.</p><p>. In this case, you</p><p> identify the bean.</p><p> public javax.ejb.EJBLocalObject getEJBLocalObject();</p><p> took a look at entity contexts.</p><p> load old entity bean data.</p><p> details the class diagram for our bank account.</p><p>* @throw AccountException thrown if amount > available balance</p><p>, shown in Source 7.5.</p><p>. We</p><p>/**</p><p> primary keys.</p><p>* Deposits amt into account.</p><p>Connection conn = null;</p><p>}</p><p>*/</p><p> try {</p><p>* 2) Store account in DB</p><p>}</p><p>}</p><p> try {</p><p> performance.</p><p>Iterator i = home.findByOwnerName( “John Smith”).iterator();</p><p>}</p><p>Passivate Your Bean:</p><p> synchronization.</p>