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Posted to users@tomcat.apache.org by Michael Delamere <ho...@michael-delamere.de> on 2002/07/27 16:10:44 UTC
Tomcat + JNDI
Hi,
I´m trying to access a bean via JNDI using Tomcat. Unfortunately, reading
documentation and mailing-lists hasn´t helped me very much. Could someone
please expalin to me what is involved in accessing a bean in tomcat via
JNDI. Here´s what I´ve done so far:
========== WEB.XML ====================
<resource-env-ref>
<description>
Object factory for MyBean instances.
</description>
<resource-env-ref-name>
jdo/FindMe
</resource-env-ref-name>
<resource-env-ref-type>
com.test.osforum.services.FindMe
</resource-env-ref-type>
</resource-env-ref>
======== MY ACTION SERVLET ============
Context context;
Context envCtx;
try {
context = new InitialContext();
envCtx = (Context) context.lookup("java:comp/env");
FindMe findme = (FindMe) envCtx.lookup("jdo/FindMe");
message = findme.getSillyMessage();
request.setAttribute("message", message);
} catch (NamingException e) {
System.out.println("-----| CATCH NAMING EXCEPTION-: " + e.toString() + "
|----- \n\n");
e.printStackTrace();
}
========================================
The above results in a " javax.naming.NamingException: Cannot create
resource instance". Could someone please point me in the right direction.
Regards,
Michael
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Re: Tomcat + JNDI
Posted by Michael Delamere <ho...@michael-delamere.de>.
thanks Craig,
that´s what I thought I read.... I was hoping that maybe there is an easier
way then wrinting my own factory to retreive objects via JNDI. What I need
is a factory which can return any JDO objects. I noticed in the particular
example provided by tomcat that you have to initialize the object in the
factory. So that would mean that every time I create a new JDO object, I
have to add it to the factory. Or have I missed something here? Any
suggestions?
Thanks very much,
Michael
----- Original Message -----
From: "Craig R. McClanahan" <cr...@apache.org>
To: "Tomcat Users List" <to...@jakarta.apache.org>
Sent: Saturday, July 27, 2002 6:09 PM
Subject: Re: Tomcat + JNDI
> Have you defined the resource itself in server.xml? You'll need to set up
> the appropriate <Resource> and <ResourceParams> elements there in order to
> define how Tomcat is actually supposed to create the object factory for
> this resource. See the jndi-resources-howto.html for more information on
> creating object factories for your own beans.
>
> Craig
>
>
> On Sat, 27 Jul 2002, Michael Delamere wrote:
>
> > Date: Sat, 27 Jul 2002 16:10:44 +0200
> > From: Michael Delamere <ho...@michael-delamere.de>
> > Reply-To: Tomcat Users List <to...@jakarta.apache.org>
> > To: tomcat-user@jakarta.apache.org
> > Subject: Tomcat + JNDI
> >
> > Hi,
> >
> > I´m trying to access a bean via JNDI using Tomcat. Unfortunately,
reading
> > documentation and mailing-lists hasn´t helped me very much. Could
someone
> > please expalin to me what is involved in accessing a bean in tomcat via
> > JNDI. Here´s what I´ve done so far:
> >
> > ========== WEB.XML ====================
> > <resource-env-ref>
> > <description>
> > Object factory for MyBean instances.
> > </description>
> > <resource-env-ref-name>
> > jdo/FindMe
> > </resource-env-ref-name>
> > <resource-env-ref-type>
> > com.test.osforum.services.FindMe
> > </resource-env-ref-type>
> > </resource-env-ref>
> >
> > ======== MY ACTION SERVLET ============
> > Context context;
> > Context envCtx;
> > try {
> > context = new InitialContext();
> > envCtx = (Context) context.lookup("java:comp/env");
> >
> > FindMe findme = (FindMe) envCtx.lookup("jdo/FindMe");
> > message = findme.getSillyMessage();
> > request.setAttribute("message", message);
> > } catch (NamingException e) {
> > System.out.println("-----| CATCH NAMING EXCEPTION-: " + e.toString()
+ "
> > |----- \n\n");
> > e.printStackTrace();
> > }
> > ========================================
> >
> > The above results in a " javax.naming.NamingException: Cannot create
> > resource instance". Could someone please point me in the right
direction.
> >
> > Regards,
> >
> > Michael
> >
> >
> >
> > --
> > To unsubscribe, e-mail:
<ma...@jakarta.apache.org>
> > For additional commands, e-mail:
<ma...@jakarta.apache.org>
> >
> >
>
>
> --
> To unsubscribe, e-mail:
<ma...@jakarta.apache.org>
> For additional commands, e-mail:
<ma...@jakarta.apache.org>
>
--
To unsubscribe, e-mail: <ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>
Re: Tomcat + JNDI
Posted by "Craig R. McClanahan" <cr...@apache.org>.
Have you defined the resource itself in server.xml? You'll need to set up
the appropriate <Resource> and <ResourceParams> elements there in order to
define how Tomcat is actually supposed to create the object factory for
this resource. See the jndi-resources-howto.html for more information on
creating object factories for your own beans.
Craig
On Sat, 27 Jul 2002, Michael Delamere wrote:
> Date: Sat, 27 Jul 2002 16:10:44 +0200
> From: Michael Delamere <ho...@michael-delamere.de>
> Reply-To: Tomcat Users List <to...@jakarta.apache.org>
> To: tomcat-user@jakarta.apache.org
> Subject: Tomcat + JNDI
>
> Hi,
>
> I´m trying to access a bean via JNDI using Tomcat. Unfortunately, reading
> documentation and mailing-lists hasn´t helped me very much. Could someone
> please expalin to me what is involved in accessing a bean in tomcat via
> JNDI. Here´s what I´ve done so far:
>
> ========== WEB.XML ====================
> <resource-env-ref>
> <description>
> Object factory for MyBean instances.
> </description>
> <resource-env-ref-name>
> jdo/FindMe
> </resource-env-ref-name>
> <resource-env-ref-type>
> com.test.osforum.services.FindMe
> </resource-env-ref-type>
> </resource-env-ref>
>
> ======== MY ACTION SERVLET ============
> Context context;
> Context envCtx;
> try {
> context = new InitialContext();
> envCtx = (Context) context.lookup("java:comp/env");
>
> FindMe findme = (FindMe) envCtx.lookup("jdo/FindMe");
> message = findme.getSillyMessage();
> request.setAttribute("message", message);
> } catch (NamingException e) {
> System.out.println("-----| CATCH NAMING EXCEPTION-: " + e.toString() + "
> |----- \n\n");
> e.printStackTrace();
> }
> ========================================
>
> The above results in a " javax.naming.NamingException: Cannot create
> resource instance". Could someone please point me in the right direction.
>
> Regards,
>
> Michael
>
>
>
> --
> To unsubscribe, e-mail: <ma...@jakarta.apache.org>
> For additional commands, e-mail: <ma...@jakarta.apache.org>
>
>
--
To unsubscribe, e-mail: <ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>