http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html<BR>
/WEB-INF/web.xml contents which contain a jndi reference <BR><web-app
xmlns="http://java.sun.com/xml/ns/j2ee";<BR>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";<BR>
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee<BR>
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";<BR>
version="2.4"><BR>
<description>MySQL Test App</description><BR>
<resource-ref><BR>
<description>DB Connection</description><BR>
<res-ref-name>teststring</res-ref-name><BR>
<res-type>javax.sql.DataSource</res-type><BR>
<res-auth>Container</res-auth><BR>
</resource-ref><BR>
</web-app><BR>
the lookup to teststring will get you a connection to the DB<BR>
HTH<BR>
Martin<BR>
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> Date: Wed, 3 Sep 2008 01:01:40 +0100
> From: [EMAIL PROTECTED]
> To: users@tomcat.apache.org
> Subject: Problem with JNDI environment entry resources
>
> Tomcat 6.0.18
> java version "1.6.0_06" (sun-java6-jdk on Ubuntu 8.04 i386)
>
> I'm attempting to create environment entry resources, of type
> java.lang.String, within conf/server.xml and access them from web
> applications using JNDI. I've created a bare-bones test web app,
> jndistring, with the following conf/server.xml configuration:
>
> server.xml (snipped):
> -----------------------------
> <Host name="localhost"
> appBase="webapps"
> unpackWARs="true"
> autoDeploy="false"
> deployOnStarup="true"
> xmlValidation="false"
> xmlNamespaceAware="false">
>
> <Context docBase="jndistring.war"
> path="jndistring"
> useNaming="true">
>
> <Environment name="teststring"
> value="a test value"
> type="java.lang.String"
> override="false"
> />
> </Context>
>
> </Host>
>
> For the purpose of this test I've used jsp to access the value of teststring.
>
> jndistring.jsp (snipped):
> --------------------------------
> <%
> Context initCtx = new InitialContext();
> Context envCtx = (Context) initCtx.lookup("java:comp/env");
>
> String teststring = (String) envCtx.lookup("teststring");
> out.println("teststring: " + teststring);
> %>
>
> Accessing this page throws an exception:
> org.apache.jasper.JasperException: An exception occurred processing
> JSP page /test.jsp at line 18
> 15: Context initCtx = new InitialContext();
> 16: Context envCtx = (Context) initCtx.lookup("java:comp/env");
> 17:
> 18: String teststring = (String) envCtx.lookup("teststring");
> 19: out.println("teststring: " + teststring);
> 20: %>
>
> The top frame of the root cause is shown as:
> javax.servlet.ServletException: javax.naming.NameNotFoundException:
> Name teststring is not bound in this Context
>
> If I attempt to create an environment entry resource using
> <env-entry/> (and sub-elements) within web.xml, then the resource is
> created and I can access it!!!
>
> I've read the "JNDI resources howto", docs regarding the <Host/>,
> <Context/> and <Environment/> elements (and others), but don't see
> that I have missed anything.
>
> Can anyone suggest what I might have missed? Has anyone else had
> similar problems?
>
> Thanks,
>
> Paul.
>
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