Complex Webdynpro application architecture on JAVA WAS

Hello,
I am planning to develop quite complex application with Webdynpro presentation layer. I'm not so sure in j2ee technologies but I have some experience but only from quite simple applications mostly which shows some issue in j2ee programming model. I want to run my application on Java stack of WAS and underlying DB. In my DB model there is cca. 40 tables. So I'm now looking for some choice of overal architecture. I'm thinking about that there will be on bussiness layer Stateless session bean(s) which will be wrap almost all functionality and I plan to access database from bussines methods (directly or probably through some other wrapper class through openSQL/jdbc).
My question is if can anyone advice me if this architecture is good or not. I was thinking about object persistence too (mainly JDO) but in my count of tables seems it to me as really hard work, and with entity beans I haven't so much experiences. When to use JDO and when jdbc acces ?
Secondly I want to ask this:
I am used to program in java in jdbc to regular database (mysql, oracle) and there I am able to create my DB tables and so on through script generated from modeling tool. Is this can be in Java Dictionary ? or I have to click my tables in Java Dictionary Perspective. And how can I set foreign key constraints in Java Dictionary Perspective ? is it posible ? or I have to check reference integrity each time I use Insert, Update, Delete commands ?
I know this is quite many question at once, but I will be glad if anyone can answer any of that.
Best Regards,
Miroslav Koskar

Miroslav,
Your application seems to reach "critical mass" of business objects involved. If you can -- go ahead with CAF.
Any other approach will work too -- be it either Entity EJB with session facade or JDO (directly / indirectly exposed). But...
You'll will have to create plain JavaBeans for DTO in case of EJB... Even with JDO you'll have to track CUD operations in CRUD differently hence repeating work that CAF team already did. Next you'll have to create JavaBean models for your objects (thought, not a rocket science till time of model upgrades). Next you'll have to tweak this model to use types from data dictionary... And, again, this is provided with CAF out of the box...
Your second question is actually minor one -- using DDIC is possible with either approach and referntial integrity will be preserved with either technology.
Valery Silaev
EPAM Systems
http://www.NetWeaverTeam.com

Similar Messages

Complex WebDynpro Applications

Hi Friends,
Till now I have been working on simple or plain WebDynpro Components.
Please give some complex scenarios on WebDynpro that you faced and do we have any Design Patterns that we need to follow for them.
Regards,
Lakshmi Prasad.

Hi,
The Floor Plan Manager (FPM) is a framework for developing self-service applications using Web Dynpro for Java.
The Floor Plan Manager insures that all self-service applications follow a consistent pattern or road map. The pattern itself was designed to make the applications easily recognizable, clearly structured and simple to use. As a result, once you have set up the self-service applications for your enterprise, there is no requirement for end-user training or documentation.
Events in FPM
Different types of framework events lead to the FPM processing the event loop in different ways. A "user" event starts an event loop. The user event can be an application-specific event that is communicated between visible VACs in a current perspective. A user event can include clicking on a button on a UI, navigating to a new UI (e.g., a new Web page), or the like, which can result in a change of perspective.
A "save" event starts an event loop to save all modified or created UI elements. The save event is a special version of a user event, which causes the self-service application to save data. The save event is triggered after the user has modified UI elements (e.g., screen objects) and saves the modified elements.
A "review" event is a special version of a user event, which allows a user to preview changes before they are saved.
A "selection change" event is an event that is triggered when a UI selection, such as a selected skill in a profile, changes. In response to a selection change event, the FPM checks every VAC to determine if the VAC has unsaved data. If a VAC has unsaved data, the VAC "vetoes" the selection change and the FPM displays a warning message, in response to which the user may discontinue the event loop.
An "exit" event corresponds to exiting from, or shutting-down, an application. In response to an exit event, the FPM notifies all active components, including VACs and BLCs, that the application is about to shut-down. In turn, the components remove all locks on objects they have accumulated over time. The components also perform any necessary "clean-up" operations (e.g.. deleting unsaved data), and shut down.
Regards,
Sunaina Reddy T

HOw to start the project for first view in webdynpro application

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Hanif,
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Web Dynpro Java
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Embedding an existing Adobe Form into a Webdynpro Application

Hi Everyone,
I have an existing adobe form created thro transaction SFP and its working well.
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thanks for your suggestions in advance !
Liz

Pradeep,
You are right. This time I could bind the context from my interface (even though it was ABAP based).
I have one quick one for you - you mentioned earlier that when we embed an existing form into Web. View, we cannot have an Interactive form even when we check the 'enabled' property. Can you throw more light onto this pls?
The runtime error that i am encountering now says :
Adobe Processing Exception: PDF is not interactive. Data can be only imported into Interactive forms.
the source text of error is:
get result
m_pdf_object->get_document ( importing pdfdata = pdf ).
catch cx_fp_exception into lr_fpexc.
raise exception type cx_wd_general
exporting
previous = lr_fpexc
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Liz

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Hi,
I have a webdynpro application running on SAP WAS 7.0(NO portal).
Based on the request parameter, the application should show translated content. I am aware of the translation process using .xlf files. But how can a webdynpro application receive language parameter in request and show translated content?
regards,
Sujesh

Hi,
In WD4J via URL it is the parameter "sap-locale".
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Regards,
Jürgen
PS: But be sure you did not set another language for the user in the user store (e.g. UME, LDAP, etc) because this has higher prio.
See table at http://help.sap.com/saphelp_nw70/helpdata/EN/18/f3674039c6c549e10000000a1550b0/content.htm

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Hi All,
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Regards,
Basha.

Hi,
And as you said it Java Webdynpro application, it should be possible to generate the URL for the Application at runtime.
I also haven't tried, but it should work. Please let me know if LinkTOURL doesnt suffice, we can try and check if it works.
Thanks,
Anand

How to access custom JAVA webdynpro application from an iPad?

Hi,
We are trying to access custom JAVA webdynpro application from an iPad, but nothing is opening up from the iPad browser.
What can be the possible reasons for this? Any kind of SICF enablement or opening up of ports in the network?
Any inputs are welcome!!
TIA,
Regards
Deepthi

Hi,
it is possible to show Java Web Dynpro applications on a mobile device in general, but the controls and the ui should be optimized for the mobile device.
Safari devices are not officially supported so far for Mobile Web Dynpro.
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You can find more inforamtion on Mobile Always Connected at:
ht[http://help.sap.com/saphelp_nwce711core/helpdata/en/7d/28fa3e7cb1d861e10000000a114084/content.htm|http://help.sap.com/saphelp_nwce711core/helpdata/en/7d/28fa3e7cb1d861e10000000a114084/content.htm]
Best Regards,
Stefan

Testing of Java-Based Webdynpro application in NWDS

hi
Hi
I would like to test Java-Based webdynpro application in
NWDS
I am able to start and stop recording.
But when press Start Replay Button.
i am getting this error in the lower text area where messages area;
ERROR: Invalid Xml document received from the Xml Client. WindowId attribute is missing
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Ravi Shankar

Hi
Ok now i get it. Well i guess i need to come out of mental block that WebDynpro for ABAP is not there :)..
Well in that case it should work if you just record your test case.. What version of NDS are you using. It has worked for me.
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Then you right click on the application and say Record. It should run you through the screen. Once you are through stop the recording.
The XML file can be viewed in the NWDS with the test data that you entered.
regards
Ravi

Calling JAVA webdynpro applications from SAP Business workflow

Experts,
Is it possible to call JAVA webdynpro application as a task from SAP Business workflow? If yes, please pass on any links to relevant documents.
Thanks,
Deepak

Hello,
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I suggest you go trough the SAP documentation about UWL. Start for example here:
http://help.sap.com/saphelp_nw2004s/helpdata/en/39/a1bb5c4c0d4ab4a417e87ef35f1efa/frameset.htm
Regards,
Karri

Debugging WebDynpro Application( Java)

Hi All,
Can anyone help me to understand how to debug a webdynpro application in java.
To be more clear what are the steps right from starting the debugger to viewing the data in the variable.
Thanks in Advance.

hi Hemalata,
to debug an webdynpro application follow these steps:-
1.First put breakpoints in your code on the lines you wish to debug.(double click to put breakpoint).
2. First step would be to goto Window Menu -> Preferences
In Preferences setup the SAP J2EE with the appropriate Host and Port.
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5.Next goto Run ->Select Debug -> Select Webdynpro Application -> click on New.
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7.Your application should run automatically.In case it doesnt run it manually.Now once you trigger the event which contains the breakpoint given code the window should automatically shift from INTERNET EXPLORER to NETWEAVER.
8.Now select any variable you wish to see the value for , right click and select Watch.You should see the values in the top right window in Debug view.
9.Use F6 for step by step debug, or F5 for breakpoint to breakpoint debugging.
Reward points if this is of any help.
Thank you in advance.

Using Java Applet in WebDynpro Application

Hello,
I have the problem that I must access the client in my WebDynpro Application.
But I found no way to include a Java Applet in my application, so my question: Is it generally possible to include a Java Applet or not?
If it is not possible with an Applet, is there any other way to access the client?
Thanks a lot

We actually embed Java applets in our application. But only on the portal.
Wrap the applet around a BSP.
Call the URL in an iframe.
To prevent the reloading problems that we see with applets and actions, we put the applet in a modal window, with an OK button at the bottom so that when applet processing is finished, the rest of the web dynpro functionality resumes.
If you need to have them both in the same page, you can embed the BSP iview in the same portal page.

Is it possible to execute a simple java webdynpro application without deploying?

Hi,
I am a beginner and just have created an elementary java webdynpro application that enables to switch between two views. When I tried to execute the application it prompts me to configure server settings(above screenshot).Is there a way to test the working of my app without deploying in server.
regards,
Ajeeth Kumar S

Hi Jun Wu,
Because without deploying, it doesn't allow me check how my java webdynpro application works!!
I need to execute my java web dynpro application and I dont have any access to SDM pins/passwords.
Please share your valuable thoughts on the same.
regards,
Ajeeth Kumar S

How to close current window of webdynpro application using webdynpro java

Hi All,
u201CTo close the current window of webdynpro application"
if i using exit plug its giving the following error in portal runtime.
u201Ccom.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Exit-Plug must no be triggered with an URL when running in portal. Use portal navigation instead to navigate to another application! u201C .
could you send me the process how to use portal navigation for the above scenariou2026u2026instead of exitplug.
Thanks& Regards,
Srinivas.

Hi,
Follow the steps below:
1. Create a new Window and embed a View which needs to be opened from the main view.
2. Create a context attribute of type IWDWindow (Java Native Type Option)
3. Write the following code in the controller for opening the new window:
IWDWindowInfo windowInfo = (IWDWindowInfo)
wdComponentAPI.getComponentInfo().findInWindows("<windowname>");
IWDWindow window = wdComponentAPI.getWindowManager().createModalWindow(windowInfo);
wdContext.currentContextElement().set<contextattributename>(window);
window.show();
4. In the new window, create a contextattribute and bind it to the attribute created in controller and on action of the close button write the following code:
IWDWindow window = wdContext.currentContextElement().get<attributename>();
window.destroyInstance();
Hope this helps you.
Regards,
Poojith MV

How to add third-party libs to Java WAS for my Webdynpro DC?

Hello all,
Here is my scenario:
I have some thrid-party libs(some jars) which is necessary to my Webdynpro application. It is ok to add these files in the webdynpro project's classpath. But because these jars are missing on my server, somy webdynpro app not works.
Could anyone give me some proposal for this kind of problem? How to add these jars to the J2EE server and access them in the webdynpro project?
Thanks and Best regards
Deyang

Hi Deyang,
Also add these jars in the lib folder of your WebDynpro application. Open the application in the Navigator mode and there under the folder structure you will find the lib folder. Copy and paste these required jars in this folder as well.
See this pic:
<a href="http://img508.imageshack.us/img508/4614/jars9jq.jpg">Put jar files in Lib Folder</a>
This will solve your problem.
Regards
Pravesh
PS: Please consider rewarding points if helpful and solved.

Error while running webdynpro application with an Interactive form

Hi all,
I am getting the following defect when I run a adobe interactive form (webdynpro application). Any pointers?
Regards,
Deepak
500 Internal Server Error
Failed to process request. Please contact your system administrator.
Error Summary
While processing the current request, an exception occured which could not be handled by the application or the framework.
If the information contained on this page doesn't help you to find and correct the cause of the problem, please contact your system administrator. To facilitate analysis of the problem, keep a copy of this error page. Hint: Most browsers allow to select all content, copy it and then paste it into an empty document (e.g. email or simple text file).
Root Cause
The initial exception that caused the request to fail, was:
 java.net.ConnectException: Connection refused: connect
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
 at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
 at java.net.Socket.connect(Socket.java:464)
 ... 47 more
See full exception chain for details.
System Environment
Client
Web Dynpro Client Type HTML Client
User agent Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; InfoPath.1)
Version null
DOM version null
Client Type msie7
Client Type Profile ie6
ActiveX enabled
Cookies enabled
Frames enabled
Java Applets enabled
JavaScript enabled
Tables enabled
VB Script enabled
Server
Web Dynpro Runtime Vendor: SAP, build ID: 7.0013.20070717142021.0000 (release=645_VAL_REL, buildtime=2007-08-11:15:13:14[UTC], changelist=455669, host=pwdfm101), build date: Wed Oct 10 10:17:00 EDT 2007
J2EE Engine 7.00 patchlevel 109044.44
Java VM Java HotSpot(TM) Server VM, version:1.4.2_13-b06, vendor: Sun Microsystems Inc.
Operating system Windows 2003, version: 5.2, architecture: x86
Session & Other
Session Locale en_US
Time of Failure Thu Oct 18 17:39:22 EDT 2007 (Java Time: 1192743562661)
Web Dynpro Code Generation Infos
local/NIBCOSecurityFormWD
SapDictionaryGenerationCore 7.0013.20061002105236.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:26:06[UTC], changelist=419377, host=PWDFM101.wdf.sap.corp)
SapDictionaryGenerationTemplates (unknown)
SapGenerationFrameworkCore 7.0013.20060719095755.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:13:54[UTC], changelist=411255, host=PWDFM101.wdf.sap.corp)
SapIdeWebDynproCheckLayer 7.0013.20061002110128.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:32:11[UTC], changelist=419396, host=PWDFM101.wdf.sap.corp)
SapMetamodelCommon 7.0013.20061002105432.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:14:42[UTC], changelist=419384, host=PWDFM101.wdf.sap.corp)
SapMetamodelCore 7.0013.20061002105432.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:14:35[UTC], changelist=419384, host=PWDFM101.wdf.sap.corp)
SapMetamodelDictionary 7.0013.20060719095619.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:23:29[UTC], changelist=411251, host=PWDFM101.wdf.sap.corp)
SapMetamodelWebDynpro 7.0013.20070703112649.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:28:49[UTC], changelist=454024, host=PWDFM101.wdf.sap.corp)
SapWebDynproGenerationCTemplates 7.0013.20070717142021.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:42:07[UTC], changelist=455669, host=pwdfm101)
SapWebDynproGenerationCore 7.0013.20061002110128.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:32:21[UTC], changelist=419396, host=PWDFM101.wdf.sap.corp)
SapWebDynproGenerationTemplates 7.0013.20070717142021.0000 (release=645_VAL_REL, buildtime=2007-08-07:13:42:07[UTC], changelist=455669, host=pwdfm101)
sap.com/tcwddispwda
No information available null
sap.com/tcwdcorecomp
No information available null
Detailed Error Information
Detailed Exception Chain
com.sap.tc.webdynpro.clientserver.adobe.pdfdocument.base.core.PDFDocumentRuntimeException: Failed to UPDATEDATAINPDF
 at com.sap.tc.webdynpro.clientserver.uielib.adobe.impl.InteractiveForm.afterHandleActionEvent(InteractiveForm.java:418)
 at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.afterApplicationModification(ClientApplication.java:1132)
 at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.afterApplicationModification(ClientComponent.java:895)
 at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doRespond(WindowPhaseModel.java:573)
 at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:152)
 at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:335)
 at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:143)
 at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:313)
 at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingStandalone(ClientSession.java:713)
 at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:666)
 at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:250)
 at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:149)
 at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)
 at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doGet(DispatcherServlet.java:46)
 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:175)
 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)
Caused by: com.sap.tc.webdynpro.clientserver.adobe.pdfdocument.base.core.PDFDocumentRuntimeException: PDFDocument Processor failed to process Render Request.
 at com.sap.tc.webdynpro.clientserver.adobe.pdfdocument.base.core.PDFDocumentProcessor.process(PDFDocumentProcessor.java:55)
 at com.sap.tc.webdynpro.clientserver.adobe.pdfdocument.base.core.PDFDocumentInteractiveFormHandlingContext.execute(PDFDocumentInteractiveFormHandlingContext.java:100)
 at com.sap.tc.webdynpro.clientserver.adobe.pdfdocument.base.core.PDFDocumentInteractiveFormHandlingContext.execute(PDFDocumentInteractiveFormHandlingContext.java:123)
 at com.sap.tc.webdynpro.clientserver.uielib.adobe.impl.InteractiveForm.afterHandleActionEvent(InteractiveForm.java:340)
 ... 29 more
Caused by: com.sap.tc.webdynpro.pdfobject.core.PDFObjectRuntimeException: Service call exception; nested exception is:
 java.net.ConnectException: Connection refused: connect
 at com.sap.tc.webdynpro.pdfobject.core.PDFObject.doSoapCall(PDFObject.java:408)
 at com.sap.tc.webdynpro.pdfobject.core.PDFObject.render(PDFObject.java:3948)
 at com.sap.tc.webdynpro.clientserver.adobe.pdfdocument.base.core.PDFDocumentRenderHandler.handle(PDFDocumentRenderHandler.java:148)
 at com.sap.tc.webdynpro.clientserver.adobe.pdfdocument.base.core.PDFDocumentProcessor.process(PDFDocumentProcessor.java:52)
 ... 32 more
Caused by: java.rmi.RemoteException: Service call exception; nested exception is:
 java.net.ConnectException: Connection refused: connect
 at com.sap.tc.webdynpro.adsproxy.ConfigBindingStub.rpData(ConfigBindingStub.java:85)
 at com.sap.tc.webdynpro.adsproxy.ConfigBindingStub.rpData(ConfigBindingStub.java:95)
 at com.sap.tc.webdynpro.pdfobject.core.PDFObject.doSoapCall(PDFObject.java:385)
 ... 35 more
Caused by: java.net.ConnectException: Connection refused: connect
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
 at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
 at java.net.Socket.connect(Socket.java:464)
 at java.net.Socket.connect(Socket.java:414)
 at java.net.Socket.<init>(Socket.java:310)
 at java.net.Socket.<init>(Socket.java:125)
 at com.sap.engine.services.webservices.jaxm.soap.HTTPSocket.initStreamsFromSocket(HTTPSocket.java:648)
 at com.sap.engine.services.webservices.jaxm.soap.HTTPSocket.initializeStreams(HTTPSocket.java:470)
 at com.sap.engine.services.webservices.jaxm.soap.HTTPSocket.getOutputStream(HTTPSocket.java:427)
 at com.sap.engine.services.webservices.jaxrpc.wsdl2java.soapbinding.HTTPTransport.getRequestStream(HTTPTransport.java:355)
 at com.sap.engine.services.webservices.jaxrpc.wsdl2java.soapbinding.MimeHttpBinding.outputMessage(MimeHttpBinding.java:550)
 at com.sap.engine.services.webservices.jaxrpc.wsdl2java.soapbinding.MimeHttpBinding.call(MimeHttpBinding.java:1432)
 at com.sap.tc.webdynpro.adsproxy.ConfigBindingStub.rpData(ConfigBindingStub.java:78)
 ... 37 more

Hi Deepak,
If you have solved the issue could you kindly close the thread with the solution as this will help others as well. If not kindly update the thread with the status.

Complex Webdynpro application architecture on JAVA WAS

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