JCo or JCA

Question

I am currently working 4.6C and would like to move from ABAP to java enviornment.
Please let me know whether to use JCo or JCA for java web based development.
Thanks,
Harsha

Answer 1

Hi Harsha,
I think i can give conn infor here itself.
<b>Jco conn from  ABAP to Java</b>
=====================
You can  use the JCO RFC Provider Service of the Web Application Server for your ABAP to Java calls.
The steps involved in that are
1. Configure destination in SM59 in SAP.
2. Create RFC Destination in Visual Admin.
3. Create a stateless session bean with JNDI name as the name of calling function module in SAP.
4. Add a business method public void processFunction(JCO.Funtion fn) which is called by the JCO RFC Provider Service. The name should be 'processFunction'.
5. Set library references in application-j2ee-engine.xml to type weak for the following
a. com.sap.mw.jco.
b. com.sap.tc.Logging (if you are using the logging api )
Here is the sample code for the EJB biz method
Business Method.
public void processFunction(JCO.Function function) {
try {
// Get the import parameters for the function module
JCO.ParameterList importList = function.getImportParameterList();
logger.infoT("The value sent is" +
(String)importList.getValue("USER_NAME"));
// Set the export parameter value for the function module
JCO.ParameterList export = function.getExportParameterList();
export.setValue("From EJB", "RETURN");
function.setExportParameterList(export);
catch (java.lang.Exception e) {
e.printStackTrace();
<b>Jco conn from  Java to others(ex:ABAP)</b>
=====================-==========
•     Open Visual Admin(C:\usr\sap\SID\JCxx\j2ee\admin\go.bat) and connect to server
•     Go to Destinations service
•     Open HTTP Settings Tab
•     Add/Edit destination SLD_DataSupplier and type following values
URL – http://xyz.corp:53000
Authentication - BASIC
User – dynproxxx
Password - bp52st000
•     Press save and test (if you get response code 200 everything is o.k.)
•     Add/Edit other HTTP Destination named SLD_Client with the same values as SLD_DataSupplier:
URL – http://xyz.corp:53000
Authentication - BASIC
User – dynproxxx
Password - bp52st000
•     Press save and test (if you get response code 200 everything is o.k.)
•     Go to SLD Data Supplier service.
•     Press the button named: Send the Data to SLD and confirm triggering SLD Data transfer (if you receive successful message everything is o.k.).
===================
following blog might helpfull
=======================
/people/michal.krawczyk2/blog/2005/03/10/registering-a-new-technical-system-in-sld--abap-based
for basic infor
==============
http://help.sap.com/saphelp_nw04s/helpdata/en/21/84570b3ae14e77b3047c82218974b9/frameset.htm
Award points if it helps