Web proxy server - Overview 15 Dell.com Web application finds out that
Overview 15 Dell.com Web application finds out that chips needs to be procured for fulfilling the order. It submits the request for the same A Dell customer orders 100 computers on dell.com to its internal procurement application. HTTP RMI/IIOP Dell.com EJB Procurement Application EJB acts as Web service client Intel Order Parts Application EJB as Web service Web service Wrapper RMI/IIOP SOAP/HTTP Dell s procurement application communicates with Intel s order parts Web service. Figure 1.4 EJBs as Web Service clients. The EJB Ecosystem To get an EJB deployment up and running successfully, you need more than just an application server and components. In fact, EJB encourages collaboration of more than six different parties. Each of these parties is an expert in its own field and is responsible for a key part of a successful EJB deployment. Because each party is a specialist, the total time required to build an enterprise- class deployment is significantly reduced. Together, these players form the EJB Ecosystem. Let s discuss who the players are in the EJB Ecosystem. As you read on, think about your company s business model to determine which role you fill. If you re not sure, ask yourself what the core competency of your business is. Also think about what roles you might play in upcoming projects. The EJB Ecosystem is not for everyone. At my company, we ve heard ghastly stories of businesses choosing EJB because everyone else is using it, or because it is new and exciting. Those are the wrong reasons to use EJB and can result in disappointing results. For best practices and a discussion surrounding the issue of when and when not to use EJB, see Chapters 11 and 16.
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