Adaptive RFC and multiple systems; Mapping JCO_DESTINATIONS by code?

Hi,
I have just learned <a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/82/76a2406546ba15e10000000a1550b0/frameset.htm">here</a> that I can access several R/3 systems with the adaptive RFC model by using URL parameters like:
http://<hostname>:<port>/webdynpro/dispatcher/local/ESSProject/ESSApp?
<b>sap-wd-arfc-useSys=WD_MODELDATA_DEST:ABC&
sap-wd-arfc-useSys=WD_RFC_METADATA_DEST:ABC</b>
The parameters are a mapping of the original JCO_DESTINATION (WD_MODELDATA_DEST) called by the WebDynpro application to the target system which instead should be called (WD_MODELDATA_DESTABC).
Does someone know wheather this mapping can be done by java coding? For example before the execute method will be called.
Best regards,
Marcus

Hi,
This for If you send destination params are different u sent it thru URL param only.
For that u need generate URL by using the application .
For that purpose u need to create two applications u can call the first application in second application u can create URL and send Destination params with URL only.
Other wise u can create the par file that would be configured in portal and thru worksets u can pass the params like u mention the destinations.
Or at the time generationg URLS only u can add the destination names.
Thanks,
Lohi.

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In file sender, lets suppose we have synchronous settings(Best Effort). Now when File adapter's job is finished and when it
gets back the response back from XI. Please explain step by step from starting(file adapter polling the location) to getting the response coming back to XI.
Regards,
Achari.

Difference between Adaptive RFC and Adaptive RFC2 model

Hi,
What is the difference between Adaptive RFC and Adaptive RFC2 model ?
Regards,
Sunaina Reddy T

Hi
Main difference are
1.JCo 3.0 to connect to SAP Systems
2.Improved connection management
3.Faster performance
4.Lower memory consumption
5.SystemLandscape API is no longer needed
6.Compatible to ARFC1 to allow easy migration
Check the thread for further input
1.[Whatu2019s New in Web Dynpro Java?|https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/8062c7d3-c86f-2b10-4894-a9a323da20b3]
Best Regards
Satish Kumar

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Hello......is it necessary to have RFC and Logical system name for the connected system to be identical?Is there any explanation behind this if thats true....

Hi Gaurav,
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What is adaptive RFC and How to Use it

hi friends
what is the adaptive RFC
what is the use of it
how we can use it
explain me anyone
and send pdf also
thanks
ramu.

Hi,
To give u a brief idea.
rfcs are used to call data from the backend that is R/3.We use the Bapis from the R/3 system which have some pre defined functionality and data is populated in the correspoding ui elements in webdynpro interface.earlier Rfcs were used but now we have adaptive rfcs in which
if there are changes in the backend(R/3 system) such as changes in the datatype,structures,fields would be automatically be refllected in the rfcs and there would be no errors in web dyn pro even if there is a change in the back end
to be more specific folow this link
http://help.sap.com/saphelp_nw70/helpdata/EN/41/38bc8f813719488ddc9d9b21251ec3/frameset.htm
and try out this application
to use the rfcs firstly check out this document for configurations
Important Configurations for Calling ABAP Function from Java Web Dynpro Application
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/e07753b9-fa0c-2a10-64a8-c6754c45396e
heres the application.
Creating a Web Dynpro Application Accessing ABAP Functions
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/355b9c90-0201-0010-d2a8-89fece426526
regards
Nikhil Tapkir

Use of Adaptive RFC and locking

Hello,
I am using an adaptive RFC model inside a Web Dynpro Application to maintain data residing on a SAP Enterprise system.
This RFC also sets a lock in order to make sure nobody else tries to change the same data.
I use pessimistic locking which means:
1. Web Dynpro calls a RFC
2. The RFC first locks the data then reads the data and returns the result back to Web Dynpro
3. The user changes the data and presses a save button
4. Web Dynpro calls the RFC to write and unlock the data
The problem i have is the fact that after locking and reading of the data the RFC is ended and the data is received by the Web Dynpro App. But at the same moment the lock is automatically unlocked because the RFC has ended succesfully.
How can i achieve that the lock is still there at the moment i want to change the data or is this procedure of pessimistic locking not possible?
Bertil

Hi,
Whether possible or not : Don't know. Probably not with RFCs.
More importantly, shall you do it? If it is transactional data you are updating , you may wish to consider concurrency issues (what if you locked and came to web dynpro, and user is thinking whether he shall take a coffee break first before pressing the 'Save'. Would you like to keep this record(s) locked and unavailable for the entire duration?)
Normally, you would read the data in the first call, let the user update it on the second screen, and then, when the user presses save, execute in sequence :-
- try locking the record,
- if locking is successful, Verify whether the record you read has changed in the meanwhile or not (verify what you have in your workarea(before changes done by user) is the same as in DB, by reading again from the DB)
- If above check is successful, go ahead with the update else throw an error message to the user to redo the txn
- unlock, exit
hope this helps,
cheers,
Ajay

Web Dynpro with Adaptive RFC and "complex" ABAP Structures

Hi there,
I'm calling an RFC that returns a table with a "complex" structure, i.e. a structure with nested structures and tables. The issue I am having is that I would like to loop over that table and extract the relevant attributes from each row (i.e. attributes of the structure itself or of the nested structures or attributes of records of the nested tables), I however don't understand how.
My first attempt looks as follows
for(int i = 0; i < wdContext.node<<tab>>().size(); i++) {
IPrivate<<view>>.I<<tab>>Element x =
wdContext.node<<tab>>().get<<tab>>ElementAt(i);
However "x" doesn't seem to have the getter methods for the nested tables in question?
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Regards, Chris.

Hi,
If you are using model node binding over adaptive RFC model all nested structures / tables becomes sub-nodes rather then attributes.
VS

Adaptive RFC and Locking Objects from WD Java

Hi,
There are some pieces of information available on this subject but no coherent and easy to follow "manual". Also some questions remain.
I'd rate this a very important, i.e. "business critical" problem. Therefore I would appreciate your help to get things sorted in this thread.
So let's start with a summary of what I think I understood so far (corrections welcome!):
- You can call RFCs from WebDynpro and locking will work (on the ABAP side).
- Once you release your JCo connection the locks will be released, though.
- Therefore, to keep a lock in between requests you have to keep the connection.
- You can keep the connection by passing WDModelScopeType.APPLICATION_SCOPE or WDModelScopeType.COMPONENT_SCOPE to the constructor of the model class.
- You can lookup the default scope for a model using
WDModelScopeType defaultScope = WDModelFactory.lookupDefaultScopeForModel((Class) modelClazz);
Now suppose you have many users, each holding some locks.
Would you not easily run out of JCo connections? On the other hand by default WebDynpro RFC Models seem to keep a connection per application instance (= user session).
Using WDModelScopeType: Do you really need to code this or can you just configure this during design time for the deployment?
blog=/pub/wlg/1061 claims the default is APPLICATION_SCOPE.
Will connections (and thus locks) be released automatically on an HttpSession timeout? I guess so because this means the end of the application and therefore end of scope WDModelScopeType.APPLICATION_SCOPE and WDModelScopeType.COMPONENT_SCOPE.
I'm also not clear about this:
/people/sap.user72/blog/2005/01/08/adaptive-rfc-models-in-web-dynprosome-pointers
"But to ensure that the record remains locked it is necessary reserve the connection that was used for locking and be made unavailable for other models and also the connection should remain open as long as the lifetime of the screen. This becomes similar to locking records through SAP Gui . This can be easily achieved by having separate models for locking RFCs defined with APPLICATION_SCOPE and isolating its connection by not grouping with other model objects."
What does "reserve the connection" mean?
Suppose you lock some object and afterwards want to allow the user to request more information about this or other objects.
Would you need to use a different connection for that?
Suppose you want to lock two objects.
Would you need to use two different connections for that?
Suppose you want to edit both objects and save the changes inside one transaction (with atomicity). A transaction normally is associated with a single connection (unless XA protocol is used). So how would this work?
What will cause the locks to be released?
- Application expiration (timeout)
- RFC that explicitely releases locks
- Transaction commit/rollback (?)
Reference:
I found some of the information and further pointers in the blog mentioned above and here:
Disconnect method
Looking forward to your replies
Markus
Message was edited by: Markus Wissmann
Another thread with the same topic and no final answers:
Handling object locking in R/3 from WD through RFC
Message was edited by: Markus Wissmann

Hi,
This for If you send destination params are different u sent it thru URL param only.
For that u need generate URL by using the application .
For that purpose u need to create two applications u can call the first application in second application u can create URL and send Destination params with URL only.
Other wise u can create the par file that would be configured in portal and thru worksets u can pass the params like u mention the destinations.
Or at the time generationg URLS only u can add the destination names.
Thanks,
Lohi.

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Hi,
I have a JMS to JDBC interface. While this is straightforward enough, there is a requirement to clear the contents of the table before carrying out the insert
What I've tried is:
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The DELETE statement works and the Insert statement work but they won't work together. Is this possible at all? What other options are there in this case?

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Hi Experts,
i have 4 radio buttons, i need to create a single adaptive rfc model, to which i need to create a one ECC system rfc and APO system rfc(multiple backend systems). how to add the two rfc systems of logical system name to a single logical system name or Meta data, so that i can assign to a single radio button.
In the same way for model data also if so how?
1. radio button(Ecc rfc and Apo rfc)
2.radio button (Ecc rfc and Apo rfc)
3.radio button(Ecc rfc and Apo rfc)
4.radio button (Ecc rfc and Apo rfc)
help me in doing step by step.
thanks in advance
Thanks&Regards
jay

Hi Bhargava,
thank you for your effort.
The node structure of web service looks like this:
NewAWS2Model
-Context
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NameLast
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HouseNo
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In
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When I have two streets, I want that two streets will be saved in parameter street and so on...
Additionally, here is the method created by application for this web service:
public void initRequest_NewOperation( ) {
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com.sap.demo.changedataportaldc.wd.models.newaws2model.NewAWS2Model newAWS2ModelModel = createAndMapModelInstance_0("com.sap.demo.changedataportaldc.wd.models.newaws2model.NewAWS2Model");
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        com.sap.demo.changedataportaldc.wd.models.newaws2model.Context in = new com.sap.demo.changedataportaldc.wd.models.newaws2model.Context(newAWS2ModelModel);
        newOperation.setIn(in);
        com.sap.demo.changedataportaldc.wd.models.newaws2model.Response_NewOperation response_1 = new com.sap.demo.changedataportaldc.wd.models.newaws2model.Response_NewOperation(newAWS2ModelModel);
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I hope this are the inforamtion you need? Or is there something else?
Thank you very much
best regards
Anna

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If someone could tell me why this happen I will appreciate.
Thanks.

Hi Frank,
Iin another opportunity I had tried to do the same procedure you are trying and not getting hit. I ended up using the parameter "sap-wd-client = WmlClient" in the url of the application ... What makes this return in xml format and can be accessed like a Web Service. It really is not a proper use for a Web Dynpro application, but with some customization finally meet demand.
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hi
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Hi,
Didn't get your question.
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have a look at adaptive rfc http://help.sap.com/saphelp_nw04s/helpdata/en/41/38bc8f813719488ddc9d9b21251ec3/frameset.htm
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One adaptive RFC Model and Multi Backend System.

Hi All,
I am trying to fetch data from multi backend system by using an adaptive RFC model.
It is not tidy to create multi model for a RFC function to fetch data from multi SAP system, because we have dozens of SAP systems.(over 40)
So, I would like to switch to multiple SAP systems with an adaptive RFC model at runtime.
1 model(Same Function) -
> System A
> System B
> System C
Is there any sample or tutorial about this sort of senario?
Thanks in advance.
Message was edited by: JeongEog IM
Message was edited by: JeongEog IM

JeongEog,
You may use SAP java Connector for doing that. Refer the following links for the step-by-step approach.
<a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/d2/561106b8b3bc449f890cddfdc8d3e2/content.htm">Example program 1</a>
<a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/f0/eedf3d0eb8af5ee10000000a114084/content.htm">Open Connection</a>
<a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/24/efdf3d0eb8af5ee10000000a114084/content.htm">Calling a Function and Closing a Connection</a>
<a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/6a/14e13d8ee4535ee10000000a114084/content.htm">Example program 2</a>
<a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/bc/eedf3d0eb8af5ee10000000a114084/content.htm">Connection Pool</a>
Bala

Adaptive RFC and multiple systems; Mapping JCO_DESTINATIONS by code?

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