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<?xml version="1.0" encoding="ISO-8859-1"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">  <head>    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />    <meta http-equiv="Content-Style-Type" content="text/css" />    <title>The Coffee Break Application</title>    <link rel="StyleSheet" href="document.css" type="text/css" media="all" />    <link rel="StyleSheet" href="catalog.css" type="text/css" media="all" />    <link rel="Table of Contents" href="J2EETutorialTOC.html" />    <link rel="Previous" href="JMSJ2EEex5.html" />    <link rel="Next" href="CB2.html" />    <link rel="Index" href="J2EETutorialIX.html" />  </head>  <body>    <table width="550" summary="layout" id="SummaryNotReq1">      <tr>	<td align="left" valign="center">	<font size="-1">	<a href="http://java.sun.com/j2ee/1.4/download.html#tutorial" target="_blank">Download</a>	<br>	<a href="http://java.sun.com/j2ee/1.4/docs/tutorial/information/faq.html" target="_blank">FAQ</a>	<br>	<a href="http://java.sun.com/j2ee/1.4/docs/tutorial/information/history.html" target="_blank">History</a>	</td>        <td align="center" valign="center"><a accesskey="p" href="JMSJ2EEex5.html"><img id="LongDescNotReq1" src="images/PrevArrow.gif" width="26" height="26" border="0" alt="Prev" /></a><a accesskey="c" href="J2EETutorialFront.html"><img id="LongDescNotReq1" src="images/UpArrow.gif" width="26" height="26" border="0" alt="Home" /></a><a accesskey="n" href="CB2.html"><img id="LongDescNotReq3" src="images/NextArrow.gif" width="26" height="26" border="0" alt="Next" /></a><a accesskey="i" href="J2EETutorialIX.html"></a>        </td>	<td align="right" valign="center">	<font size="-1">	<a href="http://java.sun.com/j2ee/1.4/docs/api/index.html" target="_blank">API</a>	<br>	<a href="http://java.sun.com/j2ee/1.4/docs/tutorial/information/search.html" target="_blank">Search</a>	<br>	<a href="http://java.sun.com/j2ee/1.4/docs/tutorial/information/sendusmail.html" target="_blank">Feedback</a></font>	</font>	</td>      </tr>    </table>    <img src="images/blueline.gif" width="550" height="8" ALIGN="BOTTOM" NATURALSIZEFLAG="3" ALT="Divider">    <blockquote><a name="wp64222"> </a><h2 class="pTitle">The Coffee Break Application</h2><a name="wp65570"> </a><p class="pBody">This chapter describes the Coffee Break Application, a set of Web applications that demonstrate how to use several of the Java Web services APIs together. The Coffee Break sells coffee on the Internet. Customers communicate with the Coffee Break server to order coffee online. The server consists of Java Servlets, JSP pages, and JavaBeans components. A customer enters the quantity of each coffee to order and clicks the &quot;Submit&quot; button to send the order.</p><a name="wp65571"> </a><p class="pBody">The Coffee Break does not maintain any inventory. It handles customer and order management and billing. Each order is filled by forwarding suborders to one or more coffee distributors. This process is depicted in <a  href="CB.html#wp65776">Figure 31-1</a>.</p><a name="wp65774"> </a><p class="pBody"></p><div align="left"><img src="images/Fig19-1.gif" height="256" width="359" alt="Coffee Break Application Flow" border="0" hspace="0" vspace="0"/></div><p class="pBody"></p><p>  <a name="65776"> </a><strong><font >Figure 31-1    Coffee Break Application Flow</font></strong></p><a name="wp65575"> </a><p class="pBody">The Coffee Break server obtains the coffee varieties it sells and their prices by querying distributors at startup and on demand.</p><div class="pSmartList1"><ol type="1" class="pSmartList1"><a name="wp65576"> </a><div class="pSmartList1"><li>The Coffee Break server uses SAAJ messaging to communicate with one of its distributors. It has been dealing with this distributor for some time and has previously made the necessary arrangements for doing request-response SAAJ messaging. The two parties have agreed to exchange four kinds of XML messages and have set up the DTDs those messages will follow.</li></div><a name="wp65577"> </a><div class="pSmartList1"><li>The Coffee Break server uses JAXR to send a query searching for coffee distributors that support JAX-RPC to the Java WSDP Registry Server.</li></div><a name="wp65578"> </a><div class="pSmartList1"><li>The Coffee Break server requests price lists from each of the coffee distributors. The server makes the appropriate remote procedure calls and waits for the response, which is a JavaBeans component representing a price list. The SAAJ distributor returns price lists as XML documents. </li></div><a name="wp65651"> </a><div class="pSmartList1"><li>Upon receiving the responses, the Coffee Break server processes the price lists from the JavaBeans components returned by calls to the distributors.</li></div><a name="wp65652"> </a><div class="pSmartList1"><li>The Coffee Break Server creates a local database of distributors. </li></div><a name="wp65653"> </a><div class="pSmartList1"><li>When an order is placed, suborders are sent to one or more distributors using the distributor's preferred protocol.</li></div></ol></div>    </blockquote>   <img src="images/blueline.gif" width="550" height="8" ALIGN="BOTTOM" NATURALSIZEFLAG="3" ALT="Divider">    <table width="550" summary="layout" id="SummaryNotReq1">      <tr>	<td align="left" valign="center">	<font size="-1">	<a href="http://java.sun.com/j2ee/1.4/download.html#tutorial" target="_blank">Download</a>	<br>	<a href="http://java.sun.com/j2ee/1.4/docs/tutorial/information/faq.html" target="_blank">FAQ</a>	<br>	<a href="http://java.sun.com/j2ee/1.4/docs/tutorial/information/history.html" target="_blank">History</a>	</td>        <td align="center" valign="center"><a accesskey="p" href="JMSJ2EEex5.html"><img id="LongDescNotReq1" src="images/PrevArrow.gif" width="26" height="26" border="0" alt="Prev" /></a><a accesskey="c" href="J2EETutorialFront.html"><img id="LongDescNotReq1" src="images/UpArrow.gif" width="26" height="26" border="0" alt="Home" /></a><a accesskey="n" href="CB2.html"><img id="LongDescNotReq3" src="images/NextArrow.gif" width="26" height="26" border="0" alt="Next" /></a><a accesskey="i" href="J2EETutorialIX.html"></a>        </td>	<td align="right" valign="center">	<font size="-1">	<a href="http://java.sun.com/j2ee/1.4/docs/api/index.html" target="_blank">API</a>	<br>	<a href="http://java.sun.com/j2ee/1.4/docs/tutorial/information/search.html" target="_blank">Search</a>	<br>	<a href="http://java.sun.com/j2ee/1.4/docs/tutorial/information/sendusmail.html" target="_blank">Feedback</a></font>	</font>	</td>      </tr>    </table>    <img src="images/blueline.gif" width="550" height="8" ALIGN="BOTTOM" NATURALSIZEFLAG="3" ALT="Divider"><p><font size="-1">All of the material in <em>The J2EE(TM) 1.4 Tutorial</em> is <a href="J2EETutorialFront2.html">copyright</a>-protected and may not be published in other workswithout express written permission from Sun Microsystems.</font>  </body></html>
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