JCO call from ABAP to Java

Hi to all,
I'm trying to perform a JCO call from an abap function module to a java server program. I've built a java application that extends JCO.Server library, but I'm not able to register my Program to SAP R/3 in order to be called from the abap Function module. when I run my java application directly on XI Server, I receive this error:
"Could not load middleware layer com.???.MiddlewareJRfc".
Can anyone help me, please?
Thanks!

Hi Denis,
Import the model In NWDS for ABAP for RFC.
Please check here [Accessing ABAP Functions using the Adaptive RFC Model |http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/a00f7103-6790-2a10-ac9c-fcac7c5b18a3?quicklink=index&overridelayout=true]
[Web Dynpro Model: Backend Access|http://www.sdn.sap.com/irj/sdn/nw-wdjava?rid=/webcontent/uuid/403e6bf5-426e-2910-b0a8-a95548724af9#section10 [original link is broken]]
Also check here /docs/DOC-8661#section10 [original link is broken]
Hope it helps,
Redards,
Arun

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Java calls from ABAP code in XI

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Hi,
YES, Very well it is Possible,
This will help you
/people/bv.pillai/blog/2006/09/28/calling-mdm-java-api-application-executable-from-abap
/people/vijayasarathy.raghunathan/blog/2005/12/28/java-editor-inside-abap
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I'm struggling to make connectivity setup from ABAP to Java stack. Objective is to call a java method published on javastack from a report/FM. Can some one guide me with some examples. Appreciate all your responses.
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Hello Yadagiri,
I found three links that may help you
http://help.sap.com/saphelp_nw70/helpdata/en/43/783e2beabd1ad0e10000000a114cbd/frameset.htm
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http://help.sap.com/saphelp_nw70/helpdata/en/45/0e78275adc6cbfe10000000a114a6b/frameset.htm
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Hello Forum,
I am implementing an JCO Server scenario.
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Dear everybody,
Finally I solved this old problem
I am a novice in JCO and played a little with the problem and found an old reference to the difference between J2EEAbapException and AbapException classes. I modified my program and it works! ABAP caller gets the correct exception, not system_failure! The details:
1. modify beanname.java source
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 import com.sap.mw.jco.JCO.J2EEAbapException;
 public interface ... extends EJBObject {
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 throw new JCO.J2EEAbapException("NODATA");
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 import com.sap.mw.jco.JCO;
 import com.sap.mw.jco.JCO.J2EEAbapException;
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Message was edited by: Abhishek Raj

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Hi,
Refer the below code and weblog:
?     RFC lookup using JCO (without communication channel)
      /people/sravya.talanki2/blog/2005/12/21/use-this-crazy-piece-for-any-rfc-mapping-lookups
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Is SAP going from ABAP to Java

Upto how much extent are following true, i heard from few SAP people.
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2. all the new functionalities will be preferably developed by SAP in Java instead of ABAP.
3. in the future, all of the components/features will be in Java instead of ABAP.
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> I have a doubt over here ...All the SAP ESS/MSS applications were in Web Dynpro for Java but now they are slowly been converted to Web Dynpro ABAP ..... so is SAP going the other way round ...converting all its previous Java applications back to ABAP?
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JCO call from ABAP to Java

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