Create Callable object of Web Dynpro Component (GP interface) giving error

Hi All,
We are facing a strange error in Guided Procedure.
While trying to create a new callable object of Web Dynpro Component (GP interface) after selecting the type and click on Next it is throwing below error.
*javax.xml.stream.FactoryConfigurationError: Requested factory com.ctc.wstx.stax.WstxInputFactory cannot be located. Classloader =com.sap.engine.services.deploy.server.ApplicationLoader 3995fdb9 sap.com/cafeugpuidt
    at javax.xml.stream.FactoryLocator.loadFactory(FactoryLocator.java:120)
    at javax.xml.stream.FactoryLocator.locate(FactoryLocator.java:109)
    at javax.xml.stream.FactoryLocator.locate(FactoryLocator.java:54)
    at javax.xml.stream.XMLInputFactory.newInstance(XMLInputFactory.java:41)
    at org.apache.axiom.om.util.StAXUtils$7.run(StAXUtils.java:311)*
Also while running the GP processses which are created in the past and working fine till few days back are also giving the same above error.
Please help us in resolving the issue.
Regards,
Satish

Hi Peter,
Check this link.It may be helpful.
https://www.sdn.sap.com/irj/scn/wiki?path=/display/java/netweaver%252bdeveloper%252bstudio%252b(NWDS)
Regards,
Sumangala

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Errot at creation of callable object (Web Dynpro Component (GP Interface))

Hi,
I have made a Web Dynpro component and it has been built and deployed without problems.
However, when I go to the Design Time in the portal to create the callable object, it dumps with this message:
500 Internal server error
The initial exception that caused the request to fail was:
java.lang.UnsupportedClassVersionError: bad version number in .class file
Any ideas to what this is about ?

Hi Peter,
Check this link.It may be helpful.
https://www.sdn.sap.com/irj/scn/wiki?path=/display/java/netweaver%252bdeveloper%252bstudio%252b(NWDS)
Regards,
Sumangala

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Hi,
Check out these links :
-> Composite Application Framework Tutorial Center
SAP Composite Application Framework - CAF Tutorial Center [original link is broken]
->Creating a Callable Object: Composite Application Web Dynpro Component https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/ac4c81d1-0c01-0010-adb0-bb14220343c2
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Edited by: Indu Garg on Feb 28, 2008 12:33 PM

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Hi experts,
I am facing the following problem:
I'd like to enhance a web dynpro component in order to add a popup window. The popup is triggered by the process_event method. So far everything works just fine.
But the popup needs to know some context attributes from the main component, and I cannot create a component usage in order to set the context mapping.
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Jan Phillip Höft

Hi!
Thanks for your answers first of all.
I need the popup to be a stand alone web dynpro component, so I guess the assistant class doesn't do the trick because I can not access it in the popup component.
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Jan Phillip Höft

Dynamic insertion of MIME object into a web dynpro component

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I want to dynamically insert a MIME object of type JPEG or type GIF into my web dynpro component at runtime.
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Moderator message: wrong forum, please have a look in the "Web Dynpro ABAP" forum.
Edited by: Thomas Zloch on May 23, 2011 9:55 AM

Hi Muzammil Bichoo ,
when you copy the wda component, it will be copied and will be in active state, once all the components are activated means, windows, views, everything will be available.
now create application for your component, if you have more than one window(interface view) select the one which you need for the application.
Regards
Sarath

Se80 - how to create a web Dynpro Component

Dear all,
I am running on SAP NetWeaver 2004s.I have the Web Dynpro under respository informatin system. but now i would like to create a new web dynpro component. can anyone tell me what are the steps?btw,i cannot find object list selection in SE 80..my se80 looks like below :
<a href="http://img502.imageshack.us/img502/5720/se80xv5.jpg">http://img502.imageshack.us/img502/5720/se80xv5.jpg</a>
thanks

That's really weird...your screenshot is missing the part of the screen where you define which kind of object you want to edit (and it's name). It's there where you must select "Web Dynpro comp./intf" and enter the name...it should be right below the "Test Repository" pushbutton...
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Error when Creating Component YHREFM_OBJSEL_INTERFACE. YHREFM_OBJSEL_INTERFACE Is a Component Interface, Therefore, an Instance Cannot Be Created. Name of Component May Not Be Specified. (Using Component: YHREFM_PRINT_FORM_SE, Component Usage: USAGE1)
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Best Regards,
Guo Guo Qing

Hi,
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Thank you very very much.
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Guo Guo Qing

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Hi All,
Can anybody tell me how to call a session bean's methods through a web dynpro WITHOUT java-model or web service model ??
I have following scenario:-
1. Stateless Session bean having two business methods
2. Web Dynpro component
3.Now i want to call business methods without using any model. I have got following piece of code but I dont know how to go about it.
4.Where do i have to set JNDI name for session bean? which interface will be looked for?
5. Do I have to declare public part for EJB DC? If yes, how?
//This is inside web dynpro component
InitialContext context = new InitialContext();
o = context.lookup(JNDIName);
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<returnValue> = beanRef.<ejb method name>
Please help to get a step-by-step approach to this case.
Thanks and regards,
Amey Mogare

Hi,
If I comment out the part that is using session bean's business method, DC is building fine.
And if I uncomment, then compiler is unabl eto resolve business method(s).
And i would like to mention that my EJB + J2EE App DC is building properly, but it havent yet deployed properly as I am waiting for data-source-alias name prefix to be configured by ERP team. So will this be a reason why Web Dynpro DC is not able to resolve business methods ??
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Any more ideas why it is not happening?
Pls help.
Now i went through some forum posts regarding this and found that we also need to add EJB DC to Java Build Path for WebDynproDC>Properties>Java Build Path.
I did this and now it is able to resolve business methods and DTOs as well. So to summarize I did following:-
1. Added EJB DC (complete DC) as a Used DC to Web Dynpro DC with Buid-n-Deploy-n-Run time dependency
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This reference I constructed as follows:-
<vendorname>/<name of j2ee application as appearing under display name tag in application.xml (replacing '/' with '~')>
So my Sharing Reference becomes:- <vendorname>/reqpstapscreqpstapja_reqid
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SessionRequestID beanRef = homeRef.create();
beanRef.<business method>
But After doing this I am facing another problem :-
The build fails saying it is not able find the package for DTOs. But when I see the Component Controller's code it is not showing any red or yellow marks.
Can anybody pls help me out here?
Thanks and regards,
Amey Mogare

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No executionContext attribute in Web Dynpro Component Controller

Hi All,
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I want to copy the web dynpro component. I have saved it as local object.It contains two windows and some four views.When i try to copy this component, it is getting copied, but when i try to create the "web dynpro application" of it, it is asking for "Interface View " and plug name . If i press f4 it shows "The Web Dynpro component "name of component" does not contain
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Hi Muzammil Bichoo ,
when you copy the wda component, it will be copied and will be in active state, once all the components are activated means, windows, views, everything will be available.
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Sarath

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I am doing the example mentioned in the PDF file WDJ - Using Web Dynpro Component Interface Definition.
In the PDF file its mentioned the following code inside onActionCreateDC1:
g_Usage.createComponent("com.sap.wd.childdc1comp.ChldDC1Comp");
wdThis.wdGetWDCompInterfInstInterface().passInfo(
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I have one query that what is com.sap.wd.childdc1comp.ChldDC1Comp?Is it the component name of DC or the package name of DC?
I have deployed the application.When i click on button Create Child DC1 i am getting follwing exception:
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When i click on Create Child DC2 i am getting follwing exception:
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Is it required to deploy the two child component also that is ChildDC1Comp and ChildDC2Comp?If yes then how to deploy these two child DC as when i am tryng to create application for these two component then default plug is showing blank thats why i am unable to deploy these child Dcs.
Thanks
Susmita

Hi Susmita,
Is it required to deploy the two child component also that is ChildDC1Comp and ChildDC2Comp?
Yes , u have to deploy both the components.
when i am tryng to create application for these two component then default plug is showing blank thats why i am unable to deploy these child Dcs.
U need not create an Application for deploying the component .Right Click on ur project --> Deploy.
The problem is with ur Component, while creating a Component u should have created a Interface view and default StartUp plug.
Just check whether u have Created the startup plug for ur interface view.
Open the controller editor of ur interface view --> Select Plugs Tab .
and in the plug tab , check whether u have Default Start plug (in Inbound Plugs Table).
if there is no Default Start Plug , then click the Button New to create a Default Plug .
in the pop up window -- select Stsrt Up and Give the name of the plug as "Default".
After doing this , select the default plug and Right click on the plug -->copy and Open the window Controller editor -- > select Plugs Tab --> check whether u have default plug (in Inbound plugs) in the Window controller .
if the plug is not there , then paste the plug in the Window's Inbound Plug Table .
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Thanks and Regards

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Easter

Hi,
Please refer to these links -
DEMO_COMMON_ASSISTANCE1 -Example for standard component
http://help.sap.com/saphelp_nw04s/helpdata/EN/43/1f6442a3d9e72ce10000000a1550b0/content.htm
http://help.sap.com/saphelp_nw04s/helpdata/EN/43/1f6442a3d9e72ce10000000a1550b0/content.htm
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Lekha.

Getting error while creating callable object

Hi,
I've created and deployed a DC using webdynpro.
Now I want to create a callable object from portal
I'm choosing the following options Guided Procedurers-->DesignTime>Create callable object-->userinterface>webdynprocomponent(GP interface)
On entering the required data on the displayed page, when I'm clicking 'next' option it is giving <b>"500 internal server error"</b>.
Can somebody help how to resolve this.
Thanks
Piyush

your callable object component is missing. try to take preview of the iview and check.

Is it possible to serialize a web dynpro component controller?

Hi,
Is it possible to serialize a web dynpro component controller and deserialize it for use?
I have one web dynpro application WDA1 for web dynpro component WDC1. And another web dynpro application WDA2 for WDC2 will be opened in a new window triggered by a button action in WDC1.
Iu2019d like to pass the object reference of WDC1 component controller to WDC2.
I first tried to use a static member of a class object but found out that even the static member is initialized and set in WDC1, itu2019s still initial when I access it in WDC2.
Then I searched the forum and found one article Passing Object ref to Webdynpro Application while calling from BSP screen .
The recommended way is to serialize the object reference and store in a DB table, later on read it out and deserialize it for use.
I tried serialization using the following code, but when itu2019s deserialized, the result is initial.
Can anyone share some ideas on this?
Serialize
data: ostream type string,
           xslt_err type ref to cx_xslt_exception.
***** serialize model class
try.
      call transformation id
      source model = wd_comp_controller
      result xml ostream.
    catch cx_xslt_exception into xslt_err.
endtry.
Deserialize
    data: istream type string,
          xslt_err type ref to cx_xslt_exception.
    istream = ls_db_sel-obj.
    data lr_wdc type REF TO ZIWCI_BY_WDC_SERIALIZE.
    try.
        call transformation id
        source xml istream
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      catch cx_xslt_exception into xslt_err.
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When you say new window, I assume you mean new browser window. This is a separate user session then. This is why the singleton pattern doesn't work. Have you considered using a new dialog window instead of a new browser window. It will be modal, but will share the same user session as the parent window.
>Why do you choose this approach over cross-component usage ? component usage is the way webdynpro components are >to be reused.
>You can also consider using Singleton OO pattern class to share data between these two components.
Neither of these approaches will work if you are using separate browser windows. Such an approach results in two separate user sessions (perhaps even running on different application servers depending upon how you have load balancing setup) and therefore can't share data using either of these approaches.
In general the idea of serialization and then writing the string ito a server cookie or other database table is sound. I don't think you should try and serialize the component controller, however. Serialization only saves and restores public attributes - not protected or private ones. So in general a class has to be designed for serialization. The component controller is much too complex and wasn't designed for such an operation.
I would suggest instead extracting the data you want to share out of component controller or context and serializing it into a custom class and passing that to the other component.

Create Callable object of Web Dynpro Component (GP interface) giving error

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