The document describes modifying a BPEL process from asynchronous to synchronous to perform addition. It involves taking an asynchronous BPEL process that performs addition and assigns the result to an output, but does not provide the output as it is asynchronous. A new synchronous BPEL process is created, taking the WSDL from the asynchronous process and connecting an invoke activity to call the asynchronous process, assign its outputs to variables, and return the result through a receive activity and output variable. When deployed and tested, this synchronous process provides the addition result.

1. First take asynch BPEL to perform addtion
Modify the inputs as two in XSD level
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2. Take assign activity and perform addition, assign the result to output.
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3. Deploy it and test the project in EM console

4. This project wont give the output as it is asynch processs.
Copy the WSDL URL

5. Take a new project in that take synch BPEL
Modify the inputs as two in XSD level

6. Create a Webservice On right side i.e reference side
Paste the WSDL URL
Give port type ,callback port type

7. Take invoke activity and connect to the Webservice

8. Create a invoke variable
Take assign and assign the inputs to invoke inputs

10. Take Receive Activity and connect to Webservice
Create a Receive variable

11. Take assign activity and assign receive variable to output variable

12. Deploy it
Test the project in EM console
This time you will get the result.