| 1 | <html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat Architecture - Request Process Flow</title><meta value="Yoav Shapira" name="author"><meta value="yoavs@apache.org" name="email"></head><body vlink="#525D76" alink="#525D76" link="#525D76" text="#000000" bgcolor="#ffffff"><table cellspacing="0" width="100%" border="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img border="0" alt=" |
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| 2 | The Apache Tomcat Servlet/JSP Container |
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| 3 | " align="right" src="../images/tomcat.gif"></a></td><td><font face="arial,helvetica,sanserif"><h1>Apache Tomcat 6.0</h1></font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img border="0" alt="Apache Logo" align="right" src="../images/asf-logo.gif"></a></td></tr></table><table cellspacing="4" width="100%" border="0"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr size="1" noshade></td></tr><tr><!--LEFT SIDE NAVIGATION--><td nowrap="true" valign="top" width="20%"><p><strong>Links</strong></p><ul><li><a href="../index.html">Docs Home</a></li></ul><p><strong>Contents</strong></p><ul><li><a href="index.html">Contents</a></li><li><a href="overview.html">Overview</a></li><li><a href="startup.html">Server Startup</a></li><li><a href="requestProcess.html">Request Process</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td align="left" valign="top" width="80%"><table cellspacing="4" width="100%" border="0"><tr><td valign="top" align="left"><h1>Apache Tomcat Architecture</h1><h2>Request Process Flow</h2></td><td nowrap="true" valign="top" align="right"><small><a href="printer/requestProcess.html"><img alt="Printer Friendly Version" border="0" src="../images/printer.gif"><br>print-friendly<br>version |
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| 4 | </a></small></td></tr></table><table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#525D76"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Request Process Flow"><strong>Request Process Flow</strong></a></font></td></tr><tr><td><blockquote> |
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| 5 | |
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| 6 | <p> |
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| 7 | This page describes the process used by Tomcat to handle |
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| 8 | an incoming request. This process is largely defined by |
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| 9 | the Servlet Specification, which outlines the order |
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| 10 | of events that must take place. |
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| 11 | </p> |
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| 12 | |
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| 13 | <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="description"><strong>description</strong></a></font></td></tr><tr><td><blockquote> |
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| 14 | <p> |
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| 15 | TODO |
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| 16 | </p> |
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| 17 | </blockquote></td></tr></table> |
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| 18 | |
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| 19 | <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="diagram"><strong>diagram</strong></a></font></td></tr><tr><td><blockquote> |
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| 20 | <p> |
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| 21 | A UML sequence diagram of the request process is available |
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| 22 | <a href="requestProcess/requestProcess.pdf">here.</a> |
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| 23 | </p> |
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| 24 | </blockquote></td></tr></table> |
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| 25 | |
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| 26 | <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="comments"><strong>comments</strong></a></font></td></tr><tr><td><blockquote> |
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| 27 | <p> |
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| 28 | The Servlet Specification provides many opportunities for |
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| 29 | listening in (using Listeners) or modiying (using Filters) |
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| 30 | the request handling process even before the request arrives |
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| 31 | at the servlet that will handle it. |
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| 32 | </p> |
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| 33 | |
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| 34 | </blockquote></td></tr></table> |
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| 35 | |
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| 36 | </blockquote></td></tr></table></td></tr><!--FOOTER SEPARATOR--><tr><td colspan="2"><hr size="1" noshade></td></tr><!--PAGE FOOTER--><tr><td colspan="2"><div align="center"><font size="-1" color="#525D76"><em> |
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| 37 | Copyright © 1999-2008, Apache Software Foundation |
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| 38 | </em></font></div></td></tr></table></body></html> |
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