December 9, 2004 EC511 Java Pet Store Demo Chandra Donipati

1 Application Overview Source: Designing Enterprise Applications with the J2EE TM Platform

2 Application Architecture The Pet Store Demo Consists of the following sub applications:  Pet Store Website  Order Processing Center (OPC)  Administration Application  Supplier

3 Pet Store Website Source: Designing Enterprise Applications with the J2EE TM Platform

4 Order Processing Source: Sun Microsystems (

5 Order Processing – Workflow Source: Designing Enterprise Applications with the J2EE TM Platform

6 Order Processing – Messaging Source: Sun Microsystems (

7 Java Message Service (JMS)  Messaging is a method of communication between software components or applications.  The JMS is a Java API that allows applications to create, send, receive, and read messages.  Enables ‘loosely coupled’, ‘Asynchronous’ and ‘Reliable’ communication  An integral part of J2EE Platform (1.3 onwards)  Supported by most of the Middleware vendors

8 JMS API Architecture Source: The J2EE TM 1.4 Tutorial

9 JMS Messaging Source: The J2EE TM 1.4 Tutorial Point-to-Point Publish/Subscribe

10 Order Processing - JMS Source: Sun Microsystems (

11 Web Services  A software application, accessible on the Web through an URL  Accessed by clients using XML-based protocols, such as Simple Object Access Protocol (SOAP)  Clients access a Web service application through its interfaces and bindings, which are defined using XML artifacts, such as a Web Service Definition Language (WSDL) file  A Web service is a service-oriented architecture, which is simply a collection of services that communicate with each other (and with end-user clients) through well-defined and well-known interfaces.

12 Web Services Source: W3C Working Group on Web Services Architecture

13 Web Services Source: W3C Working Group on Web Services Architecture

14 Order Processing – Web Services Source: Sun Microsystems (

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