Expose Existing EJB as Web Service

Hello,
I've recently installed studio enterprise. I've written and deployed the requisite "Hello, World!" stateless ejb. Now, I would like to expose that existing bean as a web service. I know that it simply requires a new interface and some new xml. When I try to expose it with the studio 8 ide, it seems to want to generate a new class file for the web service. Is there a clear tutorial on how to expose an existing bean as a web service without generating unnecessary classes?
All suggestions much appreciated!

Thanks for the quick reply! I took a look, and they are similar to what I am familiar with. I think what I am looking for is specific to the Java Studio IDE. I know that all I need to do is add an interface. The IDE should ( optimally ) genereate all the additional xml, wsdl, etc. This is all easy to do in WebSphere through RAD. I am looking for the equivalent in the Studio Enterprise IDE. The only tutorials I have found have been muddled at best.
I don't want the IDE to generate a new bean class. I just need a new interface to expose the bean as a Web Service. The IDE should be able to incorporate the interface into the existing jar and provide the wsdl.

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I have used Glue (http://www.themindelectric.com/products/glue/glue.html) to expose some of our stuff as Web Services. I recently found this on serverside. It's pretty good.
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Hi!
Does somebody know how can I expose a process as a web service on Oracle BPM 11g? How does it works?
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Hello All,
I am working on a SOAP to SOAP (Backend as ECC where I am exposing an RFC as Web Service). Once the Web service is generated for RFC and the WSDL is imported in PI, I can see that all the fields in different nodes become mandatory.
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Cheers
KanesI

Hi,
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http://help.sap.com/saphelp_nw2004s/helpdata/en/2e/96fd3f2d14e869e10000000a155106/content.htm
See the below links
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Benefits of exposing function module as web services

Hi All,
We are developing a case study about exposing function modules as web services.
Those web services would be later used for integration to SAP box with a Java application.
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Thanks,
Varun

Hi Varun,
Pros--->
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Hi,
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Cheers,
Heiko

Hi,
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michal

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PLEASE HELP ME.
>>> Warning: delete security configuration [apps/com.areva/ear/ejb/security/com.areva~ejb.jar]
[EXCEPTION]
java.lang.Exception
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     at com.sap.engine.services.ejb.EJBAdmin.remove(EJBAdmin.java:2538)
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     at com.sap.engine.services.deploy.server.application.RemoveTransaction.prepare(RemoveTransaction.java:178)
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     at com.sap.engine.services.deploy.server.DeployRuntimeControlImpl.remove(DeployRuntimeControlImpl.java:271)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at com.sap.pj.jmx.introspect.DefaultMBeanInvoker.invoke(DefaultMBeanInvoker.java:58)
     at com.sap.pj.jmx.mbeaninfo.AdditionalInfoProviderMBean.invoke(AdditionalInfoProviderMBean.java:289)
     at com.sap.pj.jmx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:944)
     at com.sap.pj.jmx.server.interceptor.MBeanServerWrapperInterceptor.invoke(MBeanServerWrapperInterceptor.java:288)
     at com.sap.engine.services.jmx.CompletionInterceptor.invoke(CompletionInterceptor.java:400)
     at com.sap.engine.services.jmx.RedirectInterceptor.invoke(RedirectInterceptor.java:340)
     at com.sap.pj.jmx.server.interceptor.MBeanServerInterceptorChain.invoke(MBeanServerInterceptorChain.java:330)
     at com.sap.engine.services.jmx.MBeanServerSecurityWrapper.invoke(MBeanServerSecurityWrapper.java:287)
     at com.sap.engine.services.jmx.MBeanServerInvoker.invokeMbs(MBeanServerInvoker.java:157)
     at com.sap.engine.services.jmx.ClusterInterceptor.invokeMbs(ClusterInterceptor.java:220)
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     at com.sap.engine.services.jmx.MBeanServerInterceptorInvoker.invokeMbs(MBeanServerInterceptorInvoker.java:102)
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     at com.sap.engine.services.jmx.connector.p4.P4ConnectorServerImplp4_Skel.dispatch(P4ConnectorServerImplp4_Skel.java:64)
     at com.sap.engine.services.rmi_p4.DispatchImpl._runInternal(DispatchImpl.java:291)
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     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
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     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:162)

I have the same message. I am running sp11.
Does anyone have an answer for this?????
>>> Warning: delete security configuration [apps/avalero.com/rtfa-ear/contextRoot]
[EXCEPTION]
java.lang.Exception
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     at com.sap.engine.services.deploy.server.DeployRuntimeControlImpl.remove(DeployRuntimeControlImpl.java:271)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
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     at java.lang.reflect.Method.invoke(Method.java:324)
     at com.sap.pj.jmx.introspect.DefaultMBeanInvoker.invoke(DefaultMBeanInvoker.java:58)
     at com.sap.pj.jmx.mbeaninfo.AdditionalInfoProviderMBean.invoke(AdditionalInfoProviderMBean.java:289)
     at com.sap.pj.jmx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:944)
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     at com.sap.engine.services.jmx.MBeanServerInvoker.invokeMbs(MBeanServerInvoker.java:157)
     at com.sap.engine.services.jmx.ClusterInterceptor.invokeMbs(ClusterInterceptor.java:220)
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     at com.sap.engine.services.rmi_p4.DispatchImpl._runInternal(DispatchImpl.java:294)
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     at com.sap.engine.services.rmi_p4.server.P4SessionProcessor.request(P4SessionProcessor.java:119)
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     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
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Injecting both SessionContext & WebServiceContext in an EJB 3 Web Service

Hi,
Is it valid/legal to inject both of WebServiceContext and SessionContext in an EJB 3 Web Service, e.g.:
@WebService
@Stateless
public class MyService
@Resource private SessionContext sessionContext;
@Resource private WebServiceContext webServiceContext;
}Thanks in advance.

Hello Bhupesh,
A Classpath has to be defined for a server process to avoid the exception "NoClassDefFoundError"
Refer to the below url for more clarity
http://help.sap.com/saphelp_erp2005/helpdata/en/06/24d17099f2f245822fce0ba1ab4065/frameset.htm
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Exposing backend data as Web Service

I have an RFC which takes in employee name as input and supervisor name as output.
I want to expose this functionality as Web Service using NWDS. What should I do? Any good tutorial?

Hi,
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Cannot find the WSDL as I expose a process to web service

Hi,
I have a simple process, and I try to expose it to a web service by using "Process Web Service", and I start the studio web server and test it with "http://localhost:8598/Lesson19-4WebService/webservices/ProcessService?WSDL" but no WSDL appear. Could you help me? Thanks in advance.
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EJBs and web services in Application server ??

Hi all,
I just wanted to ask for a help in a scenario that i am facing:
I have a Application that relies on EJBs for Business Logic
I basically use the Jboss A/s[4.2.2 GA] server for the same and now there is a need to Expose these bean methods through a web service
so that our web team can make use of the same Business logic.
Currently i have implemented a End point interface that my Bean class implements so that i can expose
my bean methods to the web team
Req:
I want to create a separate Enterprise Bean which resides in the same JVM as my Application bean , and acts as a wrapper for my application bean
Also,
Further elaboration of the problem is as follows:
THE existing Application beans Remote interface has all the business methods that i want to expose.
The new bean should act as a delegate which intercepts the web clients call extracts the request from the call
and passes it to the application bean methods.
So this basically requires that new bean should be able to communicate with my application bean +(Which is BTW a stateless session bean)+
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Kindly provide suggestion for the same or any ideas as soon as possible
thanks again
veneet
Edited by: RainaV on 14 May, 2009 6:49 PM
Edited by: RainaV on 14 May, 2009 6:57 PM

Let me make it more clear for everyone
Let [A] be my application bean which has all the business Logic.
is a new wrapper bean that needs to communicate to bean [A] for accessing the Business Logic
The requirement for creating Bean[B] is two folds
1) it will provide a wrapper class for breaking down the web client requests,
which are in XML format;
into simpler data structure which can be passed as parameters to bean [A}.
2)This bean [B] will send the response back to the web client who is in need of the service
Now as pointed out by one of the guys why not create a Local interface that is not possible at this point as Most of the session bean methods have been declared to throw
Remote Exceptions and i am faced with the issue that this Design mistake is irreversible due to the Size of the Code and other factors
Now i have been looking and some Alternatives for the same .
The problem is i have not been able to find any way to do the same and need suggestions and ideas if anyone has some on this issue
i hope this clears the matter
thanks again
veneet

How to check resource existance using standard web-services?

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There was the web-service KMNodeServiceStrdWSVi_Document in the SAP EP 7.0 that exposed the function "exists" checking whether the folder exists or not.
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Expose ejb3 as jaxws web service

Dear,
I want to expose my ejb3 stateless sessionbean as a jaxws web service (in order to have versioning for production redeployment high availability). I followed these docs a bit: http://e-docs.bea.com/wls/docs92/webserv/jws.html
excerpt of my class :
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@JndiName(remote="...")
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When I try to build the web service with the jws ant task, I get following errors:
[jwsc] [ERROR] - The annotation weblogic.ejbgen.RoleMapping is not allowed on ...MyWSBean because it is a JAX-WS type web service.
[jwsc] [ERROR] - The annotation weblogic.ejbgen.Session is not allowed on ...MyWSBean because it is a JAX-WS type web service.
Seems its not allowed to mix jaxws and ejb3 annotations. What is the way to go to expose my ejb3 bean as a resource?
thx

Thx for your reply.
I did it differently: Creating a EJB3 bean (using the weblogic.ejbgen annotations) and afterwords creating a seperate file for the JAXWS webservice and there injecting the bean via the EJB annotation. Works smoothly.
Although I would rather use 1 file for both sessionbean and web service
Therefore, like I said, in the EJB3 sessionbean I now use following ejbgen annotations:
@Session(ejbName="...",
               runAs="...", runAsIdentityPrincipal="...",
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@MethodIsolationLevelPattern(pattern="*", isolationLevel=IsolationLevel.TRANSACTION_READ_COMMITTED)
@RoleMapping(principals="...", roleName="...")
Not sure why this is 'ejbgen' annotations, instead of just ejb or javaee general annotations... Arent there any more standard annotations or so in order to specify these configurations (rolemapping, MethodIsolationLevelPattern, Session, runas, createasprincipalname...) ?
thanks

Expose Existing EJB as Web Service

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