Use Some Models in Web Dynpro Application

Hi,
1. When creating a model we need to refer it to r/3 environment. what should we do if we transfer the application to another environment?
2. I would like to have an application with 4 views that each one activates A DIFFERENT bapi/rfc function.
Is It ok to create some models in same application ?
Thanks in advance,
Ronit

Hi,
please find below path for adding External Jar files.
right click on the webdynpro dc and select the properties .
then clcik on Java Build path->select libraries->select External External Jars.
after that just rebuild your project (not Build).
Regards,
Govindu
Edited by: Govindu Nagotla on Apr 12, 2011 2:28 PM

Similar Messages

Problems using remote debugging for Web Dynpro applications

Hello All,
Have anyone ever encounter the above mentioned problem ? I am not able to step through my codes nor break @ my breakpoints using the debugging features despite many attempts following the tutorial on "Debuggng Web Dynpro applications". The problem always occur when I click on the Run -> Debug -> "Click on Debug". The debug perspective will show the threads running but my application window dows not appear. Should attempts be made to "Terminate All" threads and relaunch my apllication again, I will get an error message saying "Deployment of archive file already running : XXX.ear" Then I will need to wait some 15 mnutes or so before I can try again. Any suggestions ? Thank you.
The status of my J2EE engine is as stated in the tutorial:
1) State = "Debugging"
2) Debug Mode = "On"
3) Restricted Load Balancing = "Yes"
4) Productive Use = "No"
I have posted similar queries under "JDI" and "Web AS General" but did not receive and sugestions.
from
Kwok Wei

Hi
You should Create and Deploy if you want to reflect the code changes that you just did. However if you just want debug to an existing code then you need not Create and Deploy.
This can also be done as a two step process where you first deploy from NDS and launch Debug without create and deploy.
Is the issue that after you launch debug that it does not launch the application window.
Regards
Pran

How to change the Portal Password using a link from Web dynpro application

Hello Everybody,
I have a requirement to change the user password from a web dynpro application which is available on a mobile device. Firstly User will log into the portal through a mobile device and after getting authenticated user will be redirected to the mobile application. Within this mobile application there will be a link to change the login password(Portal login). Can somebody tell me how can i change the portal login password from a link available within the mobile application. Looking forward for a suitable reply.
Thanks to all,
Regards,
Saby.

Hi Maksim,
Thanks for your reply..but i would also like to know can we directly use the Change Password Iview "persoUserPassword" from the portal. Can i directly Pass the URL of this iview from the portal to a "Change Password" link in the web dynpro application, so that when the user click this link he should be able to see this Iview on his/her mobile device and should be able to change the password from there. But i dont know whether this iview will appear properly on the mobile device or we have to have a custom web dynpro application for this purpose...Please reply with a suitable answer.
Thanks in advance.
Regards,
Sarabjeet Singh.

Using IGS in Abap web dynpro application

Hi ,
I would like to develop an Abap web dynpro application with complex graphs.
There is an installation of IGS services.
In the layout screen I see only graphic basic options.
In thr internet I saw much more options in the graphic label. ( WD applic-> view-> layout ).
Does anyone know how to add this options to the view layout?
Thenks,

עיחיחןלכלןעל

Using EJB Model in Web Dynpro

I have to redeploy my EJB.ear (used as a Web Dynpro model) everytime the J2EE server is started (only the first time), after which My Web Dynpro program continues to work. In other words, the following code in my Command Bean is not successful without redeploying the EJB.ear for some reason. Can someone please tell me what I am doing wrong ?
home = (MyLocalHome) context.lookup("localejbs/MySessBean");

Walter, thanks for the reply. When I checked the EJB Container in VA after starting up the J2EE server, my EJB shows a blue check mark already with the START button grayed out (STOP button is active). So I would think the EJB is started already... HOWEVER, I noticed that when I hit the DEPLOY button there, I see a warning message popping up which says : "This Application hasn't J2EE modules, so it cannot be loaded. Proceeding with Deploy". I go ahead and finish the Deploy and then my EJB works. It seems I am not including a module when I deploy it ?
Paul

Using Java Model In Web Dynpro

Hi
I have a Java Bean. I have created a JAR file for this DC. A public Part si created for this DC and the JAr file has been added to it.
In the Web Dynpro DC, i add it in the used DCs. But when i go for Add Used Components, iam not able to see it there. And also when i am creating a model by selecting Import JavaBean Model, and selecting the Public Parts of the USed DCs Option, it gives "No Java Beans available for Import" message.
Can anyone please help in this regard, as to how the java bena model is to be used.
Thanks & regards,
Anupreet

hi,
just check out some of these links, i guess they points to your problem,
Doubt in creating a java Bean Model
/people/anilkumar.vippagunta2/blog/2005/09/02/java-bean-model-importer-in-web-dynpro
Importing a java bean model from another DC
Expose EJB through Java Bean model importer in Web Dynpro
hope it helps
regards

Oracle or MS SQL Server, EJB Models and Web Dynpro Application

Hi
I've a table in MS SQL database. I've created in Visual Admin, the datasource(jdbc/MyAlias) for the above. SQL Server has Employee Table with EmpId, FirstName, LastName and Description as its Columns.
I want to display, modify , insert and delete entries from the Employee Table using web Dynpro. For this we have used JDBC method by which we create class file which will have JDBC connectivity and logic for getting data from backend. This class file then used for display, update and other operations. And the context is built at design time.
This is not proper method, as this doesn't come under perview of MVC concept.
I want to use EJB Models for this case. But I'm stuck with some problems.
1. How do I implement EJB models in this scenario.
2. How do EJB module (entity bean) connects to external database.
3. What are the most logical steps to be used in this case.
Any pointers for this will greatly appreciated with points?
So far I was able to do create EJB module of Entity Bean type with all interfaces. But beyond this I'm not able to proceed. Do let me know the step wise procedure for this kind of scenario.
Thanks
Srikant

Hi Srikant,
I have worked on similar stuff, but the scenario was a little different. I worked on creating Web Services using EJBs, but the basic part was that, the web service was supposed to interact with the SQL Server database. So maybe I can help you...
First thing which is needed is that you have created the JDBC Connector in your Visual Administrator correctly. If you wish to cross check, you can see my answer in the following thread:
JDBC error
In this thread itself I have given the code which is the solution to your problem (this is what i believe). I am pasting the code again:
InitialContext initialContext = new InitialContext();
DataSource dataSource = (DataSource)initialContext.lookup("jdbc/MyAlias");
java.sql.Connection connection = dataSource.getConnection();
You can use this code in the method of your EJB, and then you can easily use this connection object to access your database tables using SQL queries.
And if by any chance you are looking for a step wise procedure for creating a web service from an EJB, then give me your email address, i will send you the doc.
Bye
Ankur
Do reward points if it helps!!

RFC Adaptive model in web dynpro application gives mandatory parameter erro

Hi,
I need to check when we create model to call bapi from backend, are there any checks for the input data which are done by the model before the bapi is called ?
I am passing some input parameters and I get the following error on the screen. and the return structure is empty.
Mandatory parameter BFLUSHDATAGEN of method BAPI_REPMANCONF_CREATE_MTS missing
But if I pass the very same paramters directly in se37 transaction to the bapi, then this error is not seen. it gives some other error in return structure.
There fore I have a doubt is there any check which doesnt call the bapi at all if it doesnt find the parameters it is looking for. I know the paremeters are not correct but I expect to see the same error what is seen in se37 in the return structure of my modal context element.
thanks in advance for help.
r

hi, I have corrected my code and written the below code inthe controllers init method.
Bapi_Repmanconf_Create_Mts_Input parent = new Bapi_Repmanconf_Create_Mts_Input();
wdContext.nodeBapi_Repmanconf_Create_Mts_Input().bind(parent);
Bapi_Rm_Datgen input1 = new Bapi_Rm_Datgen();
wdContext.nodeBflushdatagen().bind(input1);
input1.setMaterialnr("100-400");
input1.setPdc_Number("100066");
parent.setBflushdatagen(input1);
Even this I getmandatory paramter missing eror
kindly help
Edited by: rita c on Nov 6, 2008 6:29 PM

Using EJBs in Web Dynpro Applications

I have recently started to develop Web applications using the Web Dynpro framework. Coming from a pure J2EE world, I must admit that Web Dynpro has a few innovative features that I find interesting for user interface development. The use of component & view contexts, for example, is not unlike the ActionForms that one may find in a Struts application, but pushed a bit further. No complaints here.
What I do have some problems with is the whole CommandBean paradigm that is put forth by SAP (refer to the document <a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webdynpro/using%20ejbs%20in%20web%20dynpro%20applications.pdf">Using EJBs in Web Dynpro Applications</a>).
I do understand the usefulness of defining a model that will be used to generate and eventually bind to Context data structures. That's fine. What I do object to is the use of a so-called CommandBean to play that role. Again, coming from a J2EE world, I am familiar with the BusinessDelegate pattern - which would typically be used by a client application to invoke business logic on the server side. I would propose that a better, cleaner way of integrating EJBs with the Web Dynpro framework would be to use a BusinessDelegate for invoking business logic, and importing a separate and distinct ModelBean (instead of a CommandBean) to be used for defining and binding to Context data.
I have built one Web Dynpro application thus far. Instead of using a CommandBean, I created a ModelBean that extends my business object DTO (Data Transfer Object) (which is quite appropriate for that role, given that it implements all the get & set methods that are required for the business data that I need to model). My Web Dynpro application also makes use of an independant BusinessDelegate that is packaged with my EJB DC - this is a standard best practice on J2EE projects. I have been asked by the people working with me to modify this architecture to bring it more in line with the SAP way of doing things. I am open-minded and willing to learn and accept new ways of thinking and doing things. However, I fail to understand the usefulness of merging structure and behaviour by resorting to CommandBeans:
- It violates the MVC paradigm by having one object (the CommandBean) serve as both model AND controller as far as the Web Dynpro application is concerned. The CommandBean is obviously a model - since it is literally imported as such into the Web Dynpro application. It is ALSO a controller from the Web Dynpro's application perspective, since all calls to the back-end go thru the CommandBean via one or more of its execute_xxx methods. In contrast, the use of a business delegate by the Web Dynpro application clearly separates the model (the CommandBean... or rather, a more suitably named ModelBean) from the controller (BusinessDelegate).
- Doesn't carry its own weight. In other words, I haven't yet been provided with any valid justification for going thru the extra effort of coding the CommandBean's execute methods. It's been proposed to me that it somehow serves as an abstraction layer between the Web Dynpro application and the business logic. I would argue that it is the BusinessDelegate's role to abstract away the back-end logic from clients. If one does have a BusinessDelegate available, I would argue there's no need to code execute methods in a separate CommandBean. To prove my point, I would simply point out that all of the CommandBean examples that I have seen so far, either in How-To documents, or in production code, all follow the same pattern....
CommandBean.execute_doSomething() calls BusinessDelegate.doSomething()
Not a heck of an "abstraction" layer... I would in fact argue that it is worse than useless. If some major change occurs in the business logic that requires changing the doSomething() operation, we expect of course to modify the BusinessDelegate. The Web Dynpro client will also presumably need to be modified - that's to be expected, and unavoidable. But then, we'll also need to go about and change the CommandBean's execute_doSomething() method - again, extra work for no apparent benefit. Adding and removing business methods has the same implication. All this for an layer that simply adds the prefix execute_ in front of all business method calls... Is this "abstraction layer" worth the cost of creating and maintaining it ??
- Unnecessarily complicates error handling. I have been told that for technical reasons, it is recommended that all exceptions thrown by the CommandBean be of type WDException or WDRuntimException. But what if the client application needs to react differently to different failure scenarios ? When I create a business object, I might wish to provide the user with an error messages if connection is lost to the backend, and with a different error message if an object already exists in the database with the same attributes. In order to do that, I will have to catch the WDException, extract the cause, and continue processing from there... possible, yes, but clearly less standard and more labor intensive than the classical try/catch mechanism.
To say nothing about the fact that SAP's own API documentation clearly states that applications using Web Dynpro can reference and catch WDExceptions, but THEY MUST NOT THROW OR EXTEND IT !
- Produces unnecessary DCs. Page 6 of the aforementioned document presents an architectural view of a Web Dynpro project that uses a CommandBean. Why an extra DC for the CommandBean ?? I created my ModelBean class right inside the Web Dynpro project (in the Package view). That, to me, is where this class should reside, because it is created for no other reason that to be used by this particular Web Dynpro application. What is the benefit of placing it in its own independant DC ?
- Not a typical application of the Command pattern. The well-documented command pattern (Design Patterns - Gang of Four) has been devised mainly to enable encapsulation of request as objects, thereby making it possible to:
- specify, queue and execute requests at different times
- decouple execution of a command from its invoker
- support undo operations
- support logging changes so that they can be reapplied in case of system crash making it possible to assemble commands into composite commands (macros), thereby structuring a system around high-level operations built on primitive operations.
None of this applies to the way the SAP CommandBeans are being used. Not that much of an issue to people new to J2EE and/or OO development... but quite confusing for those already familiar with the classic Command pattern.
At this point, I fail to understand the advantage of merging structure (model) and behaviour (execute methods) through the use of a unique CommandBean object. Am I missing something ?

Hi Romeo,
You would be disappointed, this reply ain't anywhere nearby to what you are talking about...
I wanted to mail you, but you have not mentioned your email in your profile.
I am really impressed by your flair for writing. It would be far better had you written a blog on this topic. Believe me, it would really be better. There is a much wider audience waiting out there to read your views rather than on the forums. This is what I believe. To top it, you would be rewarded for writing something like this from SDN. On the blogs too, people can comment and all, difference being there you would be rewarded by SDN, here people who reply to you would be rewarded by you. Doesn't make much a difference.
Anyways the ball is still in your court
As far as I am concerned, it has still not been much time since I have started working on Web Dynpro. So can't really comment on the issue...
Bye
Ankur

How to make use of Portal service in the web dynpro application

hi
I have some portal service and how to use that in the web dynpro application.
and also what is the main diff between Portal Component and web dynpro application.
do we required portal to run web dynpro application.
thanks
mmukesh

Hi,
>> I have some portal service and how to use that in the web dynpro application.
Yes. U can use Portal service in webdynpro. Check the link given by subathra.
>> and also what is the main diff between Portal Component and web dynpro application
Portal Components are components designed to run in portal server while webdynpro application can run in J2EE WebAS.
>> do we required portal to run web dynpro application.
No for general cases. Just WebAS is sufficient to run webdynpro appl. But if u use portal service in ur webdynpro appl, then make sure both (portal service and webdynpro appl) run on same J2EE engine. That is mandatory.
Regards,
Vijai

Using .properties file in web dynpro

Hi,
I am having a requirement. I have to create a .properties file and I have to use it in my web dynpro application. How can I do that? Any help...
Thanks & Regards,
Raj

Hi,
Go to the navigator view...select src\Components\<ComponentName> and create create a .properties file.
You can read the configuration file in your webdynpro app as follows
IWDConfiguration configuration =
 WDConfiguration.getConfigurationByName(
 wdComponentAPI.getDeployableObjectPart(),
 "<<>>");
http://help.sap.com/saphelp_nw04/helpdata/en/b8/aa343e32ff1033e10000000a114084/frameset.htm
Regards, Anilkumar
Message was edited by:
 Anilkumar Vippagunta

Error using tabs in Web Dynpro application

Hi all,
I am working on a web Dynpro application where I want to use "tabs" to display different vendor details, basically I need two tabs one for header data, one for address data. What I did is I created a group and there created the element for the user to enter the vendor number and also created a button and binded it with the BAPI, now I created a tab using tabstrip and then inserting the tab and adding the element to the tab (in my case i m using the table type), once I finish this and try to do the syntax chek i am getting this error: "ACC: Element "TAB" does not have a header"
Can you please help me with this?
Thanks,
Rajat

Looks like i was missing some step... I deleted everything and then re created and this time it works.

Using a Deployable Proxy in a Web Dynpro Application

Hi,
We have a Web Dynrpo application whose model is built from a set of Java business objects (POJOs.) These Java business objects currently make calls to a back-end R/3 system using JCo. We would like to provide the ability to allow the calls to be made over Web Services to the back-end system.
To call the RFMs as web services we have created a Deployable Proxy project, added the proxy as a public part, then referenced that public part in the web dynpro application. At this point we can write code to call the web service that looks something like:
InitialContext ctx = new InitialContext();
Object serviceObject = ctx.lookup("wsclients/proxies/meridium.com/rcmo~proxies/com.meridium.rcmo.ws.proxies.plants.PlantProxy");
Z_MRDM_GET_PLANTSService service = (Z_MRDM_GET_PLANTSService)ctx.lookup("wsclients/proxies/meridium.com/rcmo~proxies/com.meridium.rcmo.ws.proxies.plants.PlantProxy");
Z_MRDM_GET_PLANTSPortType port = service.getLogicalPort();
Z_MRDM_GET_PLANTS plantParameter = new Z_MRDM_GET_PLANTS();
plantParameter.setI_PLANTID(id);
plantParameter.setI_PLANTNAME(name);
Z_MRDM_GET_PLANTSResponse response = port.z_MRDM_GET_PLANTS(plantParameter);
MT001W[] plantArray = response.getET_PLANTS();
The problem is that when I call looup to retrieve the service implementation I get a ClassCastException.
The tutorials for using a proxy in web dynpro all assume that the web service is what the model is based upon but that's not possbile for our scenario we need to call the proxy from the business objects which are the basis for our model.
According to the help documentation for consuming a deployable proxy in a JSP page:
<a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/2d/b9766df88f4a24967dae38cb672fe1/frameset.htm">http://help.sap.com/saphelp_nw2004s/helpdata/en/2d/b9766df88f4a24967dae38cb672fe1/frameset.htm</a>
It discusses adding JNDI mappings. Is this what's needed for the reference to work in a Web Dypro application too? If so, how would one add the JNDI mappings references to a Web Dynpro application?
Many thanks!

Hi Dheeram,
I'm not certain about JSPDynpage specifically, but in a general J2EE Enterprise Application project you can add a reference to the application-j2ee-engine.xml file. For example here's the content of an application-j2ee-engine.xml file that references a proxy:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application-j2ee-engine SYSTEM "application-j2ee-engine.dtd">
<application-j2ee-engine>
 <reference
 reference-type="hard">
 <reference-target
 provider-name="sap.com"
 target-type="library">com.sap.mw.jco</reference-target>
 </reference>
 <reference
 reference-type="hard">
 <reference-target
 provider-name="sap.com"
 target-type="library">com.sap.aii.proxy.framework</reference-target>
 </reference>
 <reference
 reference-type="hard">
 <reference-target
 provider-name="sap.com"
 target-type="library">com.sap.aii.util.misc</reference-target>
 </reference>
 <reference
 reference-type="hard">
 <reference-target
 provider-name="sap.com"
 target-type="interface">tc/sec/destinations/interface</reference-target>
 </reference>
 <reference
 reference-type="hard">
 <reference-target
 provider-name="sap.com"
 target-type="library">security.class</reference-target>
 </reference>
 <reference
 reference-type="weak">
 <reference-target
 provider-name="sap.com"
 target-type="service">tc~sec~destinations~service</reference-target>
 </reference>
 <reference
 reference-type="weak">
 <reference-target
 provider-name="sap.com"
 target-type="interface">tc~sec~destinations~interface</reference-target>
 </reference>
 <reference
 reference-type="weak">
 <reference-target
 provider-name="engine.sap.com"
 target-type="service">webdynpro</reference-target>
 </reference>
 <reference
 reference-type="weak">
 <reference-target
 provider-name="meridium.com"
 target-type="application">rcmo~proxies</reference-target>
 </reference>
 <provider-name>sap.com</provider-name>
 <fail-over-enable
 mode="disable"/>
</application-j2ee-engine>

Using CSS for Web dynpro application in EP

Hi,
I have some CSS (Style sheets) which I need to apply to the portal, so that all the web dynpro applications can have the same look and feel.
I read something about Theme Editor in EP. Can I somehow use that to import the CSS contents into the EP theme?
Any pointer to using CSS for Web Dynpro applications will be appreciated.
Thanks.
Puneet

Hi,
Go thorugh the follwing Web Dynpro Java
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/business_packages/a1-8-4/nw04stack09themes.zip
To know how to use it and for the steps to be followed please follow the tutorial here
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/documents/a1-8-4/how to edit web dynpro themes.pdf
the last url gives you a step by step procedure with wizards..
Regards,
RK

Problem with HowTo guide - Use the BI Java SDK in a Web Dynpro Application

Hello,
I am following the HowTo guide - Use the BI Java SDK in a Web Dynpro Application
at <a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/e49be590-0201-0010-0c83-fc20e5da124f">this link</a>.
I have configured the connector on the WAS as needed.
The problem is that when I run the application I receive an Unauthorized error on the connector URL.
If I open this URL on a browser I receive a pop-up for UID and PWD and when I enter the same UID and PWD I used to configure the connector I am able to login and see the WSDL.
Any ideas?

I've never tried using BI in WebDynpro !!!
But i foond one posting on the connection problem https://forums.sdn.sap.com/click.jspa?searchID=955524&messageID=2133396
Regards,Anilkumar

Use Some Models in Web Dynpro Application

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