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1<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat Configuration Reference - The Resources Component</title><meta value="Remy Maucherat" name="author"><meta value="remm@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="
2    The Apache Tomcat Servlet/JSP Container
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><li><a href="index.html">Config Ref. Home</a></li></ul><p><strong>Top Level Elements</strong></p><ul><li><a href="server.html">Server</a></li><li><a href="service.html">Service</a></li></ul><p><strong>Executors</strong></p><ul><li><a href="executor.html">Executor</a></li></ul><p><strong>Connectors</strong></p><ul><li><a href="http.html">HTTP</a></li><li><a href="ajp.html">AJP</a></li></ul><p><strong>Containers</strong></p><ul><li><a href="context.html">Context</a></li><li><a href="engine.html">Engine</a></li><li><a href="host.html">Host</a></li><li><a href="cluster.html">Cluster</a></li></ul><p><strong>Nested Components</strong></p><ul><li><a href="globalresources.html">Global Resources</a></li><li><a href="loader.html">Loader</a></li><li><a href="manager.html">Manager</a></li><li><a href="realm.html">Realm</a></li><li><a href="resources.html">Resources</a></li><li><a href="valve.html">Valve</a></li></ul><p><strong>Cluster Elements</strong></p><ul><li><a href="cluster.html">Cluster</a></li><li><a href="cluster-manager.html">Manager</a></li><li><a href="cluster-channel.html">Channel</a></li><li><a href="cluster-membership.html">Channel/Membership</a></li><li><a href="cluster-sender.html">Channel/Sender</a></li><li><a href="cluster-receiver.html">Channel/Receiver</a></li><li><a href="cluster-interceptor.html">Channel/Interceptor</a></li><li><a href="cluster-valve.html">Valve</a></li><li><a href="cluster-deployer.html">Deployer</a></li><li><a href="cluster-listener.html">ClusterListener</a></li></ul><p><strong>Global Settings</strong></p><ul><li><a href="systemprops.html">System properties</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 Configuration Reference</h1><h2>The Resources Component</h2></td><td nowrap="true" valign="top" align="right"><small><a href="printer/resources.html"><img alt="Printer Friendly Version" border="0" src="../images/printer.gif"><br>print-friendly<br>version
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="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>
5
6  <p>The <strong>Resources</strong> element represents the <em>web
7  application static resources</em>, from which classes will be loaded,
8  HTML, JSP and the other static files will be served. This allows the webapp
9  to reside on various mediums other than the filesystem, like compressed
10  in a WAR file, in a JDBC database, or in a more advanced versioning
11  repository.</p>
12
13  <p>A unified caching engine is provided for all accesses to the webapp
14  resources made by the servlet container and web applications which use the
15  container provided mechanisms to access such resources, such as class laoder
16  access, access through the <code>ServletContext</code> interface, or native
17  access through the <code>DirectoryContext</code> interface.</p>
18
19  <p><strong>Note: Running a webapp with non-filesystem based
20  Resources implementations is only possible when the webapp does not
21  rely on direct filesystem access to its own resources, and uses the methods
22  in the ServletContext interface to access them.</strong></p>
23
24  <p>A Resources element MAY be nested inside a
25  <a href="context.html">Context</a> component.  If it is not included,
26  a default filesystem based Resources will be created automatically,
27  which is sufficient for most requirements.</p>
28
29</blockquote></td></tr></table><table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#525D76"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Attributes"><strong>Attributes</strong></a></font></td></tr><tr><td><blockquote>
30
31  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Common Attributes"><strong>Common Attributes</strong></a></font></td></tr><tr><td><blockquote>
32
33    <p>All implementations of <strong>Resources</strong>
34    support the following attributes:</p>
35
36    <table cellpadding="5" border="1"><tr><th bgcolor="#023264" width="15%"><font color="#ffffff">Attribute</font></th><th bgcolor="#023264" width="85%"><font color="#ffffff">Description</font></th></tr><tr><td valign="center" align="left"><code>className</code></td><td valign="center" align="left">
37        <p>Java class name of the implementation to use.  This class must
38        implement the <code>javax.naming.directory.DirContext</code> interface.
39        It is recommended for optimal functionality and performance,
40        but not mandatory, that the class extend
41        <code>org.apache.naming.resources.BaseDirContext</code>, as well as
42        use the special object types provided in the
43        <code>org.apache.naming.resources</code> for returned objects.
44        If not specified, the standard value (defined below) will be used.</p>
45      </td></tr></table>
46
47  </blockquote></td></tr></table>
48
49
50  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Standard Implementation"><strong>Standard Implementation</strong></a></font></td></tr><tr><td><blockquote>
51
52    <p>The standard implementation of <strong>Resources</strong> is
53    <strong>org.apache.naming.resources.FileDirContext</strong>, and
54    is configured by its parent Context element.</p>
55
56  </blockquote></td></tr></table>
57
58
59</blockquote></td></tr></table><table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#525D76"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Nested Components"><strong>Nested Components</strong></a></font></td></tr><tr><td><blockquote>
60
61  <p>No components may be nested inside a <strong>Resources</strong> element.</p>
62
63</blockquote></td></tr></table><table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#525D76"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Special Features"><strong>Special Features</strong></a></font></td></tr><tr><td><blockquote>
64
65  <p>No special features are associated with a <strong>Resources</strong>
66  element.</p>
67
68</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>
69        Copyright &copy; 1999-2008, Apache Software Foundation
70        </em></font></div></td></tr></table></body></html>
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