| 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=" |
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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><!--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"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></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> |
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| 4 | |
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| 5 | <p>The <strong>Resources</strong> element represents the <em>web |
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| 6 | application static resources</em>, from which classes will be loaded, |
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| 7 | HTML, JSP and the other static files will be served. This allows the webapp |
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| 8 | to reside on various mediums other than the filesystem, like compressed |
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| 9 | in a WAR file, in a JDBC database, or in a more advanced versioning |
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| 10 | repository.</p> |
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| 11 | |
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| 12 | <p>A unified caching engine is provided for all accesses to the webapp |
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| 13 | resources made by the servlet container and web applications which use the |
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| 14 | container provided mechanisms to access such resources, such as class laoder |
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| 15 | access, access through the <code>ServletContext</code> interface, or native |
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| 16 | access through the <code>DirectoryContext</code> interface.</p> |
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| 17 | |
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| 18 | <p><strong>Note: Running a webapp with non-filesystem based |
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| 19 | Resources implementations is only possible when the webapp does not |
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| 20 | rely on direct filesystem access to its own resources, and uses the methods |
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| 21 | in the ServletContext interface to access them.</strong></p> |
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| 22 | |
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| 23 | <p>A Resources element MAY be nested inside a |
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| 24 | <a href="context.html">Context</a> component. If it is not included, |
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| 25 | a default filesystem based Resources will be created automatically, |
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| 26 | which is sufficient for most requirements.</p> |
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| 27 | |
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| 28 | </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> |
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| 29 | |
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| 30 | <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> |
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| 31 | |
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| 32 | <p>All implementations of <strong>Resources</strong> |
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| 33 | support the following attributes:</p> |
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| 34 | |
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| 35 | <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"> |
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| 36 | <p>Java class name of the implementation to use. This class must |
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| 37 | implement the <code>javax.naming.directory.DirContext</code> interface. |
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| 38 | It is recommended for optimal functionality and performance, |
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| 39 | but not mandatory, that the class extend |
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| 40 | <code>org.apache.naming.resources.BaseDirContext</code>, as well as |
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| 41 | use the special object types provided in the |
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| 42 | <code>org.apache.naming.resources</code> for returned objects. |
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| 43 | If not specified, the standard value (defined below) will be used.</p> |
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| 44 | </td></tr></table> |
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| 45 | |
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| 46 | </blockquote></td></tr></table> |
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| 47 | |
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| 48 | |
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| 49 | <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> |
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| 50 | |
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| 51 | <p>The standard implementation of <strong>Resources</strong> is |
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| 52 | <strong>org.apache.naming.resources.FileDirContext</strong>, and |
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| 53 | is configured by its parent Context element.</p> |
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| 54 | |
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| 55 | </blockquote></td></tr></table> |
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| 56 | |
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| 57 | |
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| 58 | </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> |
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| 59 | |
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| 60 | <p>No components may be nested inside a <strong>Resources</strong> element.</p> |
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| 61 | |
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| 62 | </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> |
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| 63 | |
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| 64 | <p>No special features are associated with a <strong>Resources</strong> |
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| 65 | element.</p> |
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| 66 | |
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| 67 | </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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| 68 | Copyright © 1999-2008, Apache Software Foundation |
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| 69 | </em></font></div></td></tr></table></body></html> |
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