Access Portal Parameter from within ABAP-Web Dynpro

Hi all,
I have an ABAP Web Dynpro which is executed via an Web Dynpro iView in Enterprise Portal.
How can I read the UserID of the portal user within the web dynpro? (the portal user will not be the user who called the Web Dynpro)
Any suggestions on this?
Thanks in advance.
Kind Regards,
Martina
~~~~~~~~~~~~~~~~
ABAP Web Dynpro developed within CRM 5.0 system
Enterprise Portal 6.0

Hi Diz,
I tried doing the same thing by following the steps as mentioned by you. Just to re iterate,
1. Created a DC "Portal Application Standalone" project by the name myservice.
2. Created a portal service inside myservice by the ame AmitsService.
3. Exposed IAmitsService.class in the public part.
4 Build and deployed the DC on server and tested it through an abstract portal component and it worked FINE !!
Now..
5. Created anoter DC of type WebDynPro
6. Added SAP_JTECHS -> epbc.prtapi._api as a "Used DC" with dependency build time and runtime
7. Specified the sharing reference in the properties as PORTAL:sap.com/myservice
8. Tried to reference the service using the following code..
IAmitsService portalservice=(IAmitsService)WDPortalUtils.getServiceReference(IAmitsService.KEY);
9.Build and deployed the DC.
10. When I run the application I am getting the following error
Processing HTTP request to servlet [dispatcher] finished with error.
The error is: com.sap.engine.frame.core.load.SAPNoClassDefFoundError: com/sapportals/portal/prt/service/IService
Exception id: [000D6008418B005C0000002C00000D200004163CE6719E1D]
PLEASE ADVISE

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Hello Experts,
I tried to develop a portal service (EquiService) and a web dynpro application (wdequset) which accesses the portal service. I put my web dynpro in an IView to show it in the portal. The service is running but when I try to open the IView I always get an error. I debugged my web dynpro application and found out that I didnt get a reference to the service (portalEquiService is always null). See the following code and have a look to my comments.
public void wdDoInit()
 //@@begin wdDoInit()
 String key = IEquiService.KEY;
 * Here I get the right key. Thats OK so far.
// IEquiService portalEquiService = (IEquiService)PortalRuntime.getRuntimeResources().getService(key);
 * When I use this line to get an instance of the service, I get the following error:
 * java.lang.NoClassDefFoundError: com/sapportals/portal/prt/runtime/PortalRuntime
 * The package "com.sapportals.portal.prt.runtime.*" is imported
 IEquiService portalEquiService = (IEquiService) WDPortalUtils.getServiceReference(key);
 * I found this in the "How to Access a Portal Service Within a WebDynpro Java Application" document.
 * When I use this line, I get the following error:
 * java.lang.NoClassDefFoundError: com/company/service/equi/IEquiService
 * The package "com.company.service.equi.IEquiService" is also imported.
 wdContext.currentContextElement().setEquinummer(portalEquiService.getEquiData().getEquiNr());
 //@@end
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service: psequinr|EquiService
SAPJ2EE::company.com/wdequset
So the service seems to know my web dynpro application (after debugging for the first time).
Detailed error information 1 (when I try to get the reference by PortalRuntime.getRuntimeResources().getService(key) ):
java.lang.NoClassDefFoundError: com/sapportals/portal/prt/runtime/PortalRuntime
 at com.company.service.ServiceCust.wdDoInit(ServiceCust.java:107)
 at com.company.service.wdp.InternalServiceCust.wdDoInit(InternalServiceCust.java:112)
 at com.sap.tc.webdynpro.progmodel.generation.DelegatingCustomController.doInit(DelegatingCustomController.java:73)
 at com.sap.tc.webdynpro.progmodel.controller.Controller.initController(Controller.java:215)
 at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
 at com.sap.tc.webdynpro.progmodel.controller.Component.getCustomControllerInternal(Component.java:436)
 at com.sap.tc.webdynpro.progmodel.controller.Component.getMappableContext(Component.java:374)
 at com.sap.tc.webdynpro.progmodel.controller.Component.getMappableContext(Component.java:403)
 at com.sap.tc.webdynpro.progmodel.context.MappedAttributeInfo.initAttributeMapping(MappedAttributeInfo.java:319)
 at com.sap.tc.webdynpro.progmodel.context.MappedAttributeInfo.init(MappedAttributeInfo.java:278)
 at com.sap.tc.webdynpro.progmodel.context.NodeInfo.initAttributes(NodeInfo.java:674)
 at com.sap.tc.webdynpro.progmodel.context.DataNodeInfo.doInit(DataNodeInfo.java:238)
 at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init(NodeInfo.java:659)
 at com.sap.tc.webdynpro.progmodel.context.Context.init(Context.java:40)
 at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:199)
 at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:539)
 at com.sap.tc.webdynpro.progmodel.view.ViewManager.bindRoot(ViewManager.java:421)
 at com.sap.tc.webdynpro.progmodel.view.ViewManager.init(ViewManager.java:130)
 at com.sap.tc.webdynpro.progmodel.view.InterfaceView.initController(InterfaceView.java:41)
 at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
 at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.displayToplevelComponent(ClientComponent.java:135)
 at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.init(ClientApplication.java:404)
 at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:618)
 at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59)
 at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:251)
 at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154)
 at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116)
 at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doGet(DispatcherServlet.java:48)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
 at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
 at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)
 at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)
 at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)
 at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)
 at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
 at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:160)
 at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
 at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
 at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
 at java.security.AccessController.doPrivileged(Native Method)
 at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100)
 at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)
Detailed error information 2 (when I tryto get reference by WDPortalUtils.getServiceReference(key) ):
java.lang.NoClassDefFoundError: com/company/service/equi/IEquiService
 at com.company.service.ServiceCust.wdDoInit(ServiceCust.java:123)
 at com.company.service.wdp.InternalServiceCust.wdDoInit(InternalServiceCust.java:112)
 at com.sap.tc.webdynpro.progmodel.generation.DelegatingCustomController.doInit(DelegatingCustomController.java:73)
 at com.sap.tc.webdynpro.progmodel.controller.Controller.initController(Controller.java:215)
 at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
 at com.sap.tc.webdynpro.progmodel.controller.Component.getCustomControllerInternal(Component.java:436)
 at com.sap.tc.webdynpro.progmodel.controller.Component.getMappableContext(Component.java:374)
 at com.sap.tc.webdynpro.progmodel.controller.Component.getMappableContext(Component.java:403)
 at com.sap.tc.webdynpro.progmodel.context.MappedAttributeInfo.initAttributeMapping(MappedAttributeInfo.java:319)
 at com.sap.tc.webdynpro.progmodel.context.MappedAttributeInfo.init(MappedAttributeInfo.java:278)
 at com.sap.tc.webdynpro.progmodel.context.NodeInfo.initAttributes(NodeInfo.java:674)
 at com.sap.tc.webdynpro.progmodel.context.DataNodeInfo.doInit(DataNodeInfo.java:238)
 at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init(NodeInfo.java:659)
 at com.sap.tc.webdynpro.progmodel.context.Context.init(Context.java:40)
 at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:199)
 at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:539)
 at com.sap.tc.webdynpro.progmodel.view.ViewManager.bindRoot(ViewManager.java:421)
 at com.sap.tc.webdynpro.progmodel.view.ViewManager.init(ViewManager.java:130)
 at com.sap.tc.webdynpro.progmodel.view.InterfaceView.initController(InterfaceView.java:41)
 at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
 at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.displayToplevelComponent(ClientComponent.java:135)
 at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.init(ClientApplication.java:404)
 at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:618)
 at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59)
 at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:251)
 at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154)
 at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116)
 at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doGet(DispatcherServlet.java:48)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
 at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
 at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)
 at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)
 at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)
 at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)
 at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
 at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:160)
 at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
 at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
 at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
 at java.security.AccessController.doPrivileged(Native Method)
 at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100)
 at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)
Hope that anybody knows what could be wrong here.
Thanks a lot.
Rene

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service: psequinr|EquiService
SAPJ2EE::company.com/wdequset
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