Entity Services: readByCustomKeys operation mapped to External Service

Hello *,
in my CAF application I'd like to read a product from SAP PLM. Within my Entity Service materialNumber is my custom key and therefore a corresponding operation exists: readByCustomKeys.
I map this operation to my External Service (Web service provided by XI).
As I can't test this operation directly with the Service Browser (deosn't appear there), I wrap my Entity Service with an Application Service where I use the readByCustomKeys operation from Entity Service.
Now when I test the Application Service operation I get the following error message in Service Browser:
ERROR. Invalid type value :
In XI I can see that there was no error and I got well defined XML data as response. So the problem must occur anywhere in the mapping back from External Service data to Entity Service attributes.
Wrong data type mapping can be excluded as I already tested this possibility.
Does anyone know what could be the reason?
Thanks for your answers and best regards
Joschi

Hello Joachim,
I dont have a lot of experience with readByCustomKeys (one experience which failed) but uou can also use read itself. If you have defined materialNumber as a key in your entity service, then this field can be used in read operations as well (I have a lot of positve experiences with this approach). You will find materialNumber while mapping read with your external service and you need not map the key field generated by Entity Service.
For testing entity services, we have had several positive experiences with the config browser, specially for a findBy, read and even update operation. It was very easy to have a prototype UI to check the entity services.
I know this isnt the answer to your question, but just sharing my experiences.
All the best!!!
Regards,
Parag.

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Hi,
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Hi Ankit
I had managed to solve the problem with a workaround
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[No endpoints found. Check if the service is configured and if its
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Reuse PI Operation Mapping as a service in SAP NetWeaver BPM
Using Operation Mappings (PI) in a BPM Process - Process Orchestration - SAP Library
Using NetWeaver PI’s Mapping in NetWeaver BPM
- Marked as "local provider" and WS;
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Lucas Santos

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com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:101) at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:650) at com.sap.tc.webdynpro.clientserver.cal.ClientManager.processRequest(ClientManager.java:155) at com.sap.tc.webdynpro.clientserver.session.core.ApplicationHandle.doProcessing(ApplicationHandle.java:105) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:63) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:50) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:390) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:264) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:347) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:325) at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:887) at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:241) at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92) at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148) 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:95) at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:159)Caused by: java.lang.NullPointerException at com.sap.caf.mp.mmr.adapter.MMServiceRetrievalAdapter.readMappingRule(MMServiceRetrievalAdapter.java:232) at com.sap.caf.mp.mmr.ejb.MMServiceRetrievalAdapterCallerBean.readMappingRule(MMServiceRetrievalAdapterCallerBean.java:125) at com.sap.caf.mp.mmr.ejb.MMServiceRetrievalAdapterCallerLocalLocalObjectImpl0.readMappingRule(MMServiceRetrievalAdapterCallerLocalLocalObjectImpl0.java:553) ... 49 morejava.lang.NullPointerException at com.sap.caf.mp.mmr.adapter.MMServiceRetrievalAdapter.readMappingRule(MMServiceRetrievalAdapter.java:232) at com.sap.caf.mp.mmr.ejb.MMServiceRetrievalAdapterCallerBean.readMappingRule(MMServiceRetrievalAdapterCallerBean.java:125) at com.sap.caf.mp.mmr.ejb.MMServiceRetrievalAdapterCallerLocalLocalObjectImpl0.readMappingRule(MMServiceRetrievalAdapterCallerLocalLocalObjectImpl0.java:553) at com.sap.caf.mp.core.data.service.DataServiceBridge.getMappingRuleIds(DataServiceBridge.java:472) at com.sap.caf.mp_mmr_bridge.rt.impl.RuntimeHelper.getExternalOperationConfig(RuntimeHelper.java:141) at com.sap.caf.mp_mmr_bridge.rt.IRuntimeHelper.getExternalOperationConfig(IRuntimeHelper.java:48) at com.sap.caf.rt.bol.da.remote.RemoteDataAccessService.create(RemoteDataAccessService.java:465) at com.sap.xrfc.besrv.person.PersonServiceBean.create(PersonServiceBean.java:74) at com.sap.xrfc.besrv.person.PersonServiceLocalLocalObjectImpl0.create(PersonServiceLocalLocalObjectImpl0.java:345) 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.caf.rt.services.serviceaccess.ServiceWrapper.createDependentObject(ServiceWrapper.java:430) at com.sap.caf.rt.services.serviceaccess.ServiceWrapper.createDataContainerBean(ServiceWrapper.java:194) at com.sap.caf.rt.services.serviceaccess.CAFServiceAccessBeanImpl.createDataObject(CAFServiceAccessBeanImpl.java:159) at com.sap.caf.rt.services.serviceaccess.CAFServiceAccessLocalLocalObjectImpl20.createDataObject(CAFServiceAccessLocalLocalObjectImpl20.java:647) at com.sap.caf.rt.ui.cool.generic.AspectServiceAccess.insertAspectRow(AspectServiceAccess.java:211) at com.sap.caf.rt.ui.cool.generic.Aspect.insertRows(Aspect.java:1426) at com.sap.caf.rt.ui.cool.generic.Aspect.sendChanges(Aspect.java:1542) at com.sap.caf.rt.ui.cool.generic.ServiceModule.sendChanges(ServiceModule.java:299) at com.sap.caf.ui.servicebrowser.components.visualizer.controllers.TableViewCC.saveData(TableViewCC.java:377) at com.sap.caf.ui.servicebrowser.components.visualizer.controllers.wdp.InternalTableViewCC.saveData(InternalTableViewCC.java:196) at com.sap.caf.ui.servicebrowser.components.visualizer.views.TableViewCV.onActionSave(TableViewCV.java:396) at com.sap.caf.ui.servicebrowser.components.visualizer.views.wdp.InternalTableViewCV.wdInvokeEventHandler(InternalTableViewCV.java:371) at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:87) at com.sap.tc.webdynpro.progmodel.controller.Action.fire(Action.java:67) at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doHandleActionEvent(WindowPhaseModel.java:417) at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:132) at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:415) at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:101) at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:650) at com.sap.tc.webdynpro.clientserver.cal.ClientManager.processRequest(ClientManager.java:155) at com.sap.tc.webdynpro.clientserver.session.core.ApplicationHandle.doProcessing(ApplicationHandle.java:105) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:63) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:50) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:390) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:264) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:347) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:325) at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:887) at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:241) at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92) at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148) 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:95) at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:159)
I have configured RFC connections in the administrative tools. Still it is not working.
What should be the reason behind this?
Thanks,
Bhavik

Hi Guys,
i have the same issue when calling a external service ...
I'm calling a web service located on my server, and i get the same error ...
I have a error while the method "loadbycustomkeys" is trying to get data from the web service.
in the error trace i find the same error id : nullSourceOrTargetForMapping which occurs in the readMappingRule method.
have you found a solution for your issue please ? let me know !
Thxs
MCT

Entity Services: readByCustomKeys operation mapped to External Service

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