Applet as EJB client error

hello
Is it possible to invoke EJB's from signed applets ?
I have signed weblogic.jar and jar of my applet.
APPLET CODE="MyApplet.class" ARCHIVE="MyAppletArchive.jar,weblogic.jar"
WIDTH=600 HEIGHT=400
When applet tries to invoke EJB it throws exception:
java.lang.ClassNotFoundException: weblogic.jndi.internal.ServerNamingNode_WLStub
I think that applet cannot load stub class from server because of security restrictions.
Do you know how to solve the problem ?
thanx
Maris

Hello Maris,
This particular issue that you are facing is mentioned in the WLS documentation.
Basically, you have to take caution when running ejbc (-disableHotCodeGen), and
avoiding the ClassNotFoundException by accessing the InitialContext in only the
thread that deals with applet lifecycle methods (such as start, stop, init, destroy).
Please see the following link for more information:
http://e-docs.bea.com/wls/docs70/applets/usingapplets.html#1075866
Best regards,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
"Maris Orbidans" <[email protected]> wrote:
>
hello
Is it possible to invoke EJB's from signed applets ?
I have signed weblogic.jar and jar of my applet.
APPLET CODE="MyApplet.class" ARCHIVE="MyAppletArchive.jar,weblogic.jar"
WIDTH=600 HEIGHT=400
When applet tries to invoke EJB it throws exception:
java.lang.ClassNotFoundException: weblogic.jndi.internal.ServerNamingNode_WLStub
I think that applet cannot load stub class from server because of security
restrictions.
Do you know how to solve the problem ?
thanx
Maris

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In article <[email protected]>,
[email protected] says...
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stuff at all). Needless to say there are no examples of such an app in
the samples dir, they are all web-based.
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exception is org.omg.CORBA.COMM_FAILURE: minor code: 1 completed:
Maybe]" error.
This is a very simple test, and I'm getting quite frustrated in trying
to figure out what's actually wrong.
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module called achptestEjb, the bean name is TestService)
TestService service = null;
TestServiceHome home=null;
String host = "localhost";
String port = "12345";
try {
Properties env = new Properties();
Context context=null;
String jndiName="ejb/achptestEjb/TestService";
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env.put
("java.naming.factory.initial","com.sun.jndi.cosnaming.CNCtxFactory");
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"Matthew Shinn" <[email protected]> wrote in message
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<mapping-properties>pcImpl0/moduleComp1/Data/MensagemM112.mapping</mapping-properties>
</cmp>
<refresh-period-in-seconds>600</refresh-period-in-seconds>
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<ejb-name>Registo</ejb-name>
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<pass-by-reference>false</pass-by-reference>
<cmp>
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</cmp>
<refresh-period-in-seconds>600</refresh-period-in-seconds>
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<pass-by-reference>false</pass-by-reference>
<cmp>
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<refresh-period-in-seconds>600</refresh-period-in-seconds>
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</cmp>
<refresh-period-in-seconds>600</refresh-period-in-seconds>
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<ejb-name>TransaccaoIniciada</ejb-name>
<jndi-name>ejb/TransaccaoIniciada</jndi-name>
<pass-by-reference>false</pass-by-reference>
<cmp>
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</cmp>
<refresh-period-in-seconds>600</refresh-period-in-seconds>
</ejb>
<pm-descriptors>
<pm-descriptor>
<pm-identifier>SunONE</pm-identifier>
<pm-version>1.0</pm-version>
<pm-class-generator>com.iplanet.ias.persistence.internal.ejb.ejbc.JDOCodeGenerator</pm-class-generator>
<pm-mapping-factory>com.iplanet.ias.cmp.NullFactory</pm-mapping-factory>
</pm-descriptor>
<pm-inuse>
<pm-identifier>SunONE</pm-identifier>
<pm-version>1.0</pm-version>
</pm-inuse>
</pm-descriptors>
<cmp-resource>
<jndi-name>mysqlpmanager</jndi-name>
<default-resource-principal>
<name>bes</name>
<password>besbes</password>
</default-resource-principal>
</cmp-resource>
</enterprise-beans>
</sun-ejb-jar>
Thanks in advance for any help.
Nuno

http://docs.sun.com/source/817-2175-10/decmp.html
Please go to the above docs and look thru the examples given in it.
Example 2
This query returns all products in a specified price range. It defines two query parameters which are the lower and upper bound for the price: double low, double high. The filter compares the query parameters with the price field:
"low < price && price < high"
The finder element of the sun-ejb-jar.xml file would look like this:
<finder>
<method-name>findInRange</method-name>
<query-params>double low, double high</query-params>
<query-filter>low < price && price &lt
high</query-filter
</finder>
I hope this hepls. In your case u just have to make it null.

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Any help really appreciated.
Chris Taylor

hi Chris Taylor, did you find the solution for this error. i too get this error and i am looking for the answer. if you find any answer please share with me too. if i get any answer for this i will reply you too.

URGENT : ejb client in Oracle 8

We developed a EJB client. This client should be called from an Oracle Database 8.1 (ejb compliant). But, each time we tried to load weblogic.jar, we have several errors into Oracle (ie : ORA-29534 NamingContext could not be resolved)
Do you have an idea why ? Someone already developed an ejb client into Oracle 8.1 ?

They are reccomended because the next step going from your simple single EJB
to anything interesting, like adding more EJB's adding web-apps, adding
web-services etc etc involves ears. If the setup and overhead for an EAR is
easy, then just start there.
But no if you just doing helloworld you of course dont have to ears.
cheers
mbg
"Christopher R. Gardner" <[email protected]> wrote in message
news:3fc0560e$[email protected]..
>
"Mark Griffith" <[email protected]> wrote:
You can still run ejbc from the command line its still there. And you
can
still run weblogic.Deployer. (I dont ever reccomend jaring up in dev,
it
just takes longer, do exploded its easier and faster).
But ear's are easy, see:So ears are recommended even if you're just doing EJBs (e.g., a simpleHello World)
and no web apps (none needed for the Hello World or a PC client)?
http://www.niffgurd.com/mark/work/blog/
Cheers
mbg
"Christopher R. Gardner" <[email protected]> wrote in message
news:3fbfd6c6$[email protected]..
My understanding is ejbc has been deprecated and replaced with appc.Moreover,
BEA is encourgaging developers to deploy ear files. All I want todo is
to use
ant to deploy a jar file with a single EJB in it. I'm not findingthe WL
documentation
very helpful. Hopefully, you'll have better luck than I.
"skmurali" <[email protected]> wrote:
Hi
In order deploy EJB application in Weblogic 8.1, is it necessary
to compile
the application in WebLogic.ejbc. I did not find such files in
WebLogic
8.1
In weblogic 7.0 versiion has such files.
The present procedure is as follows.
1. Create a jar file contains all class files.
2. Create a jar file contains class jar files, plus .xml files
3. Deploy into weblogic 8.1 server EJB Deployment utility.
==================
Please help me.
Murali

Building an EJB Client

I'm completely confused on how to build an EJB client automagically using Ant.
I have a simple EJB, which I compile using the wlwBuild Ant task. If I set the "ejbgen.jar-settings.ejb-client-jar" property in the project's build.properties, the client jar gets built, but it then ends up in the application EAR file. Worse yet, the generated application.xml descriptor includes the client module. Deploying the ear file fails since WebLogic tries to deploy both modules, and it blows up on NamingExceptions.
I've kludged the process by using wlwBuild and then 'fixing' the resulting EAR file, but that's far from ideal. It works for simple projects, but not Integration projects with the auto-generated very ugly EJB names.
I've looked at wlappc, but the documentation is so scarce I can't tell if this is the tool to use, or how to make it work. Trial and error has gotten me nowhere...:(
So the question is: how can I build the EJB client through Ant without having it end up in the application EAR?
thanks
mike

I'm looking for too and there isn't any.
Here is an example. I hope it could be helpful.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<%@ page import="javax.naming.*" %>
<%@ page import="javax.rmi.*" %>
<%@ page import="java.rmi.*" %>
<%@ page import="javax.ejb.*" %>
<%@ page import="modelo.ejb.*" %>
<%@ page
language="java"
contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"
%>
<%!
Fachada sbFachada = null;
public void jspInit() {
     String sJNDI = "ejb/modelo/ejb/FachadaHome";
     try{
          Context ejbCtx = (Context) new InitialContext();
          System.out.println("Obteniendo la referencia JNDI: " + sJNDI);
          Object oRef = ejbCtx.lookup(sJNDI);
          FachadaHome home = (FachadaHome) PortableRemoteObject.narrow(oRef, FachadaHome.class);
          try {
               sbFachada = home.create();
          } catch (CreateException ce){
               System.out.println("Error en la creaci�n");
          } catch (RemoteException re) {
               System.out.println("Error remoto en creaci�n");
     } catch (NamingException ne){
          System.out.println("NamingException " + ne.toString());
%>
<TITLE>InvocarEJB2.jsp</TITLE>
</HEAD>
<BODY>
<%
     out.println(sbFachada.contador());
%>
</BODY>
</HTML>
Salu2.
V�ctor.

Help regarding applet for querying client's MAC?

Please help with an applet and java code that uses Runtime.getRuntime().exec("ipconfig -all") and gets the client's machine MAC address?
If any one already worked with applets for querying client mahchine MAC , please give me a solution.

remus.dragos wrote:
vasu.mtech wrote:
I am giving an explanation where I want this:
We have an application, where user will be given a specific machine(with one MAC) and have to login from there only. If he tries to login from different machine with same user id, we should throw an error message. That's concept. We know that this reduces/kills operatability of the user from different machines.
But we shouldn't allow the user operating from diffrent machines.What happens if the admins NIC burns? And he gets a news one? He can't log in until you manually change his
MAC in the database ???Database? That's not secure!
It has to be hardcoded into the exe (guess what the kid's next question will be?).

I am getting this problem when running ejb client

Hi,
Any one help me , i am getting this error when i run my ejb Client
D:\sample\Client>
java -Djava.naming.factory.initial=com.sun.jndi.cosnamin
g.CNCtxFactory -Djava.naming.provider.url=iiop://localhost:1050 com.net.ejbexamples.slsb.EJBClient
Exception in thread "main" org.omg.CORBA.COMM_FAILURE: minor code: 1398079490
completed: No
at com.sun.corba.se.internal.iiop.IIOPConnection.writeLock(IIOPConnectio
n.java:956)
at com.sun.corba.se.internal.iiop.IIOPConnection.send(IIOPConnection.jav
a:1017)
at com.sun.corba.se.internal.iiop.IIOPOutputStream.invoke(IIOPOutputStre
am.java:71)
at com.sun.corba.se.internal.iiop.ClientRequestImpl.invoke(ClientRequest
Impl.java:82)
at com.sun.corba.se.internal.corba.ClientDelegate.invoke(ClientDelegate.
java:153)
at com.sun.corba.se.internal.corba.InitialNamingClient.resolve(InitialNa
mingClient.java:195)
at com.sun.corba.se.internal.corba.InitialNamingClient.cachedInitialRefe
rences(InitialNamingClient.java:260)
at com.sun.corba.se.internal.corba.InitialNamingClient.resolve_initial_r
eferences(InitialNamingClient.java:183)
at com.sun.corba.se.internal.corba.ORB.resolve_initial_references(ORB.ja
va:1465)
at weblogic.iiop.IORManager.createInitialReference(IORManager.java:113)
at weblogic.corba.j2ee.naming.InitialContextFactoryImpl.getInitialContex
t(InitialContextFactoryImpl.java:96)
at weblogic.corba.j2ee.naming.InitialContextFactoryImpl.getInitialContex
t(InitialContextFactoryImpl.java:86)
at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialCont
extFactory.java:149)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:6
60)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:241
at javax.naming.InitialContext.init(InitialContext.java:217)
at javax.naming.InitialContext.<init>(InitialContext.java:193)
at com.net.ejbexamples.slsb.EJBClient.main(EJBClient.java:15)
Thanks

Found in negative cache.... very strange.
RFC found in negative cache
What is the negative cache?

[Jeveloper + EJB client - EJB on OAS] Problem connecting

I having problems getting a simple client from within JDeveloper 3.0(Code snippet - OAS/EJB Client) talking to a simple EJB on OAS 4.0.8.
I have deployed OK (red flag against status?) but when I run the client using port - 5512(ORB port)I get the message below
Anybody any ideas?
Creating an initial context
Looking for the EJB published as 'MyOASApp/MyEJB'
Naming exception occurred!
Cause: This may be an unknown URL, or some classes required by the EJB are missing from your classpath, or your OAS host is short of resources
Suggestion: Check the components of the URL, and make sure your project includes a library containing the EJB .jar files generated by the deployment utility.
[Root exception is java.net.UnknownServiceException: no content-type]javax.naming.NamingException: Failure to access http://hfxcap4:5512/ows-bin/rmproxy.ior; listener inaccessible or configured wrongly
at oracle.oas.jndi.oas.SiteResolver.getIOR(Compiled Code)
at oracle.oas.jndi.oas.SiteResolver.resolveListenerURL(Compiled Code)
at oracle.oas.jndi.oas.SiteResolver.resolveSiteContact(Compiled Code)
at oracle.oas.jndi.oas.SiteResolver.resolveSiteContact(Compiled Code)
at oracle.oas.jndi.oas.SiteResolver.resolveSiteObject(Compiled Code)
at oracle.oas.jndi.oas.BeanInitialContext.resolve(Compiled Code)
at oracle.oas.jndi.oas.BeanContext.lookup(Compiled Code)
at oracle.oas.jndi.oas.BeanInitialContext.lookup(Compiled Code)
at oracle.oas.jndi.oas.WrapperContext.lookup(Compiled Code)
at oracle.oas.jndi.oas.BeanContext.lookup(Compiled Code)
at javax.naming.InitialContext.lookup(Compiled Code)
at package1.MyOASAppClient.main(Compiled Code)
**************

HI, I have the same problem that you had, maybe did you manage through ?? Thanks for all the help you could bring me.
Nico
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by pFrooney:
Back Again ...
I have tried all ao the above
now using this code below but it fails on the lookup with the error message below:
..created library with client stub, using 1.1.8, moved OASRuntime to top of included libraries
Any suggestions
String oasUrl = "oas://hfxcap4:80";
String oasEJB = "MyOASApp/MyEJB" ;
// Setup the environment
Hashtable environment = new Hashtable();
// Turn JNDI on to OAS
environment.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, "oracle.oas.naming.jndi.RemoteInitCtxFactory");
// Lookup the URL
conv_package.MyEJBHome homeInterface = null;
try {
System.out.println("Creating an initial context");
// Get initial JNDI context
Context site = (Context) ((new InitialContext(environment)).lookup(oasUrl));
org.omg.CORBA.COMM_FAILURE:
at oracle.oas.orb.CORBA.Request._invoke(Compiled Code)
at oracle.oas.orb.CORBA.Delegate._invoke(Compiled Code)
at org.omg.CORBA.portable.ObjectImpl._invoke(Compiled Code)
at oracle.oas.orb.CORBA.Delegate.is_a(Compiled Code)
at org.omg.CORBA.portable.ObjectImpl._is_a(Compiled Code)
at oracle.oas.jndi.oas.BeanInitialContext.resolve(Compiled Code)
at oracle.oas.jndi.oas.BeanContext.lookup(Compiled Code)
at oracle.oas.jndi.oas.BeanInitialContext.lookup(Compiled Code)
at oracle.oas.jndi.oas.WrapperContext.lookup(Compiled Code)
at oracle.oas.jndi.oas.BeanContext.lookup(Compiled Code)
at javax.naming.InitialContext.lookup(Compiled Code)
at CClient_package.MyOASAppClient.main(Compiled Code)<HR></BLOCKQUOTE>
null

Applet as EJB client error

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