Re: I can't get the resource reference throught the element!

Marco Mistroni Sun, 25 Aug 2002 22:44:31 -0700

HI,

if u want to have a resource reference and use it in your web

application, you should put hte resource reference in a file called weblogic.xml (pls correct me if

i am wrong, it worked with WLS 5.1).

If the reference is used by an EJB, then it's fine to put it in ejb-xml.jar and weblogic-ejb.jar, but

if u are accessing that resource from a servlet etc, u should put it also in a weblogic.xml file.

hope this helps

marco

-----Original Message-----
From: ext kongtao [mailto:[EMAIL PROTECTED]]
Sent: 26. August 2002 8:50
To: [EMAIL PROTECTED]
Subject: I can't get the resource reference throught the <resource-ref> element!

Hi All:
In my EJB ,I can't get a connection through the PoolConnection.Follwing is fragment of EntityBean/config.xml/ejb-jar.xml/weblogic-ejb-jar.xml.Pls help me!
your help would be appreciated! In bean codes,The NullPointerException
will be thrown when I invoke the getConnection method.Maybe I can find
the JNDIName of DataSource .Why?

-------java code--------

env.put(Context.PROVIDER_URL,"t3://localhost:80");
ctx=new InitialContext(env);
ds=(DataSource)ctx.lookup("java:comp/env/jdbc/TXDataSource")

--------config.xml-----

-------web.xml-----

<resource-ref>
    <description />
    <res-ref-name>jdbc/TXDataSource</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
</resource-ref>

-------ejb-jar.xml-----

<entity>
            <resource-ref>
                <description />
                <res-ref-name>jdbc/TXDataSource</res-ref-name>
                <res-type>javax.sql.DataSource</res-type>
                <res-auth>Container</res-auth>
            </resource-ref>
</entity>

------weblogic-ejb-jar.xml------------

<weblogic-enterprise-bean>
        <ejb-name>StyleBean</ejb-name>
        <reference-descriptor>
            <resource-description>
                <res-ref-name>jdbc/TXDataSource</res-ref-name>
                <jndi-name>MyDataSource</jndi-name>
            </resource-description>
        </reference-descriptor>
        <jndi-name>StyleBean</jndi-name>
</weblogic-enterprise-bean>

------------------------exception fragment

java.lang.NullPointerException
        at com.sabrina.ejb.StyleBean.getConnection(StyleBean.java:341)
        at com.sabrina.ejb.StyleBean.ejbCreate(StyleBean.java:55)
        at =
com.sabrina.ejb.StyleBean_81hvkv_Impl.ejbCreate(StyleBean_81hvkv_Impl

..............

Re: I can't get the resource reference throught the element!

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