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From Aaron Mulder <ammul...@alumni.princeton.edu>
Subject Re: <ejb-ref> <ejb-link> Implementation in 4.0.b1
Date Sat, 10 Mar 2001 13:40:28 GMT
	I'm a little confused by all of the discussion around this.
Acoording to the spec, the <ejb-link> is supposed to have the name of
an EJB deployed in the same application unit.  In other words, no JNDI
stuff, no factories, just a name.  "MyBean", or whatever.
	If Tomcat wants you to put JNDI stuff in there, isn't that an
abuse of the spec?  Shouldn't Tomcat be using a separate server-specific
deployment descriptor to provide the extra information to reference beans
that are in a different application (i.e. those that require cusotm JNDI
settings)?

Aaron

On Fri, 9 Mar 2001 tttye@ticnet.com wrote:
> Weining Qi writes:
>
> > if you are running tomcat 3.x in the same window (tomcat run), look at the
> > feedback from tomcat when call the ejb that way, you can see that tomcat
> > does not recognize the namespace "java:com/env/" for calling ejb as
>   The name is "java:comp/ejb"  NOT --------------.
>   And yes tomcat does recognize it!!!!
>   Because it is defined in web.xml as shown in the snip.
>
> > the sun j2ee specification v1.3. you should call ejb directly by its jndi
> > name, which you gave when you deployed it.
> I tried that, it does not work.  I get "NamingException".
> Note: the EJB is deployed in a different machine than tomcat.
> When I try to open the context to that machine directly from a servlet in
> tomcat, I get:
> javax.naming.NoInitialContextException: Cannot instantiate class:
> org.jnp.interfaces.NamingContextFactory.  Root exception is
> java.lang.ClassCastException: org.jnp.interfaces.NamingContextFactory
>     at
> javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:659)
>     at
> javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:250)
>     at javax.naming.InitialContext.init(InitialContext.java:226)
>     at javax.naming.InitialContext.<init>(InitialContext.java:202)
>     at SimpleServlet.printContextInfo(SimpleServlet.java:168)
>     at SimpleServlet.doIt(SimpleServlet.java:99)
>     at SimpleServlet.doGet(SimpleServlet.java:30)
>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
>     at
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:573)
>     at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:321)
>     at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:236)
>     at
> org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:386)
>     at
> org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:144)
>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
>     at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
>     at filters.ExampleFilter.doFilter(ExampleFilter.java:140)
>     at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:180)
>     at filters.ExampleFilter.doFilter(ExampleFilter.java:140)
>     at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:180)
>     at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:251)
>     at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
>     at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:196)
>     at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
>     at
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:464)
>     at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
>     at
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2041)
>     at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
>     at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
>     at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:414)
>     at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
>     at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:159)
>     at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
>     at
> org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:818)
>     at
> org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:897)
>     at java.lang.Thread.run(Thread.java:484)
>
> YET: this same code works when I run it from a standalone Java application.
> I believe that tomcat's InitialContext() is preventing the remote
> connection from being established.
>
> >
> > Weining
> > ================================
> > Weining Qi
> > RabobankICT and Info.nl, Amsterdam
> > IPO, TU/e, Eindhoven, The Netherlands
> > http://weining.n3.net/
> > Tel: +31.628161183
> >
> > ----- Original Message -----
> > From: <tttye@ticnet.com>
> > To: <tomcat-dev@jakarta.apache.org>
> > Sent: Friday, March 09, 2001 5:55 PM
> > Subject: <ejb-ref> <ejb-link> Implementation in 4.0.b1
> >
> >
> > >
> > > I am trying to obtain a remote reference to an EJB in another machine.
> > > I have set the ejb-ref in web.xml as follows:
> > > <ejb-ref>
> > >     <description>Sample bean generated by coolgen placed here for ease
of
> > >                      early testing</description>
> > >     <ejb-ref-name>ejb/S_STRESS_32K</ejb-ref-name>
> > >     <ejb-ref-type>Session</ejb-ref-type>
> > >     <home>cool.models.coop07.java.S_STRESS_32KpsHome</home>
> > >     <remote>cool.models.coop07.java.S_STRESS_32Kps</remote>
> > >     <ejb-link>jndi:/ttt1.ca.com:1099/S_STRESS_32Kps</ejb-link>
> > > </ejb-ref>
> > > However, when I do ctx.lookup("java:/comp/ejb/S_STRESS_32K") I get a null
> > > reference instead of the necessary remote reference to the home interface.
> > > Is ejb-link implemented and documented?
> > > Which code is involved in ejb-link lookup?
> > > Is this fixed in the latest 4.0?
> > >
> > > ---------------------------------------------------------------------
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> >
> >
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> >
>
>
>
>
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>


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