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From John Walstra <jwals...@spoonserver.com>
Subject JNDI woes
Date Mon, 02 Sep 2002 01:00:51 GMT
I'm trying to use JNDI. I followed the JNDI HOWTO on the Tomcat web site, but 
I'm getting errors. This is the error message I'm getting.

javax.naming.NamingException: Cannot create resource instance
        at 
org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:167)
        at 
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:299)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:835)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:181)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:822)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:194)
        at lms.core.page.Page.<init>(Page.java:44)
        at java.lang.Class.newInstance0(Native Method)



--Page.java (snippet)

  public Page()
  {
    try
    {
      Context initCtx = new InitialContext();
      Context envCtx = (Context) initCtx.lookup("java:comp/env");

      this.setImageServer( (Server)envCtx.lookup( "server/Image" ) );
    }
    catch( NamingException e)
    {
      e.printStackTrace( System.err );
    }
  }

--server.xml
        <Context path="/lms" docBase="lms" debug="3" reloadable="true"
          crossContext="true">
(snip)
          <Resource name="server/Image" auth="Container"
                    type="lms.core.Server"/>
          <ResourceParams name="server/Image">
            <parameter>
              <name>hostname</name>
              <value>localhost</value>
            </parameter>
            <parameter>
              <name>port</name>
              <value>80</value>
            </parameter>
         </ResourceParams>
      </Context>

--web.xml
 <?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>

  <resource-env-ref>
    <description>
      Default image server
    </description>
    <resource-env-ref-name>
      server/Image
    </resource-env-ref-name>
    <resource-env-ref-type>
      lms.core.Server
    </resource-env-ref-type>
  </resource-env-ref>

</web-app>

lms.core.Server is just a bean with two attributes and operators to set and 
get them. Very basic.

Now for some debug info. When I start the server I get the following message. 
So it's finding it.

XmlMapper: org.apache.catalina.core.StandardContext.addResourceEnvRef( 
server/Image, lms.core.Server)

However I also get:

2002-09-01 20:22:14 StandardContext[/lms]: Bind naming operation failed : 
javax.naming.NamingException: Name Image is already bound in this Context

What else should I look for?

Thanks,
John

-- 
John Walstra
jwalstra@spoonserver.com


Workers of the world, arise!  You have nothing to lose but your chairs.

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