jndi datasource not found?

[maomao1234]

i am use jboss-3.0_tomcat-4.1 . after deployed, running, system post error :
jndi datasource not found?
code below:
//ctx is initContext object.
Datasource ds = (DataSource)ctx.lookup("java:comp/jdbc/DataSource");
how to write "java:comp/jdbc/DataSource" ???
i am using Sybase 11.5 Database and using jconnect5.5 .
please help me ,and glad to any hint . thanks

[jonlee]

OK. Assume you have a datasource, sybase-ds.xml defined in the server/default/deploy directory of JBoss.
<?xml version="1.0" encoding="UTF-8"?>

<!-- ===================================================================== -->
<!-- -->
<!-- JBoss Server Configuration -->
<!-- -->
<!-- New ConnectionManager setup for Sybase ASE/ASA jConnect driver -->
<!-- Thanks to Marc Zampetti <[e-mail]> -->
<!-- This is a minimal example. See the generic example for other stuff -->
<!-- ===================================================================== -->

<!-- $Id: sybase-ds.xml,v 1.1 2002/07/31 21:58:44 d_jencks Exp $ -->



<local-tx-datasource>
<jndi-name>jdbc/SybaseDB</jndi-name>
<!-- Sybase jConnect URL for the database.
NOTE: The hostname and port are made up values. The optional
database name is provided, as well as some additinal Driver
parameters.
-->
<connection-url>jdbc:sybase:Tds:host.at.some.domain:5000/db_name?JCONNECT_VERSION=6</connection-url>
<driver-class>com.sybase.jdbc2.jdbc.SybDataSource</driver-class>
<user-name>x</user-name>
y
</local-tx-datasource>



The datasource connection is:
Datasource ds = (DataSource)ctx.lookup("java:/jdbc/SybaseDB");

You can also see your JNDI bindings in the JBoss jmx-console webapp, from the jndi-view link.