How to design BPEL process where BPEL is called by PL/SQL code?

Question

Hi,
My BPEL process is called by a PL/SQL code given below.
CREATE OR REPLACE PROCEDURE testd(errbuf OUT VARCHAR2,
retcode OUT VARCHAR2)
IS
soap_request VARCHAR2(20000);
soap_respond VARCHAR2(10000);
http_req UTL_HTTP.REQ;
http_resp UTL_HTTP.RESP;
l_detail VARCHAR2(10000);
endpoint VARCHAR2(130);
begin
endpoint := 'http://afsmlnx04.rheem.com:7105/soa-infra/services/default/HelloWorldPayload/bpelprocess1_client_ep';
soap_request := '<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body xmlns:ns1="http://oracle.nl/HelloWorldPayload"><ns1:process><ns1:input>abc</ns1:input></ns1:process></soap:Body></soap:Envelope>';
http_req := utl_http.begin_request(
endpoint
, 'POST'
, 'HTTP/1.1'
utl_http.set_header(http_req
, 'Content-Type'
, 'text/xml');
utl_http.set_header(http_req
, 'Content-Length'
, length(soap_request));
utl_http.set_header(http_req
, 'SOAPAction'
, 'process');
utl_http.write_text(http_req, soap_request);
http_resp := utl_http.get_response(http_req);
utl_http.read_text(http_resp, soap_respond);
utl_http.end_response(http_resp);
dbms_output.put_line('soap'||soap_respond);
EXCEPTION
WHEN utl_http.end_of_body THEN
utl_http.end_response(http_resp);
WHEN utl_http.request_failed THEN
DBMS_OUTPUT.PUT_LINE('Request Failed: ' || utl_http.get_detailed_sqlerrm);
WHEN utl_http.http_server_error THEN
DBMS_OUTPUT.PUT_LINE('Server Error: ' || utl_http.get_detailed_sqlerrm);
WHEN utl_http.http_client_error THEN
DBMS_OUTPUT.PUT_LINE('Client Error: ' || utl_http.get_detailed_sqlerrm);
WHEN others THEN
DBMS_OUTPUT.PUT_LINE(sqlerrm);
END;
The above procedure will be defined as concurrent program in Oracle EBS.This concurrent program will call the bpel process.My question is how should i design the bpel process so that bpel will know it is called by a concurrent program?
My BPEL is doing picking a file by FTP adapter and inserting data into a table.
Please throw some lights on this!!

Answer 1

Option 1:
You have to design the service as a synchronous BPEL process
1. Do a synchronous ftp get to read the file.
2. Transform and write it into database table
3. Reply results back to plsql
Disadvantage: Your BPEL process should complete from BPEL timeout happens.
Option 2:
1. Enqueue the message into AQ from the concurrent program
2. From the BPEL monitor the AQ, start the process when the message arrives
3. Do a synchronous ftp get to read the file.
4. Transform and write it into database table
You cannot reply the results back to concurrent program.
5. However, you could have another AQ to send the results back to concurrent program.
6. Your concurrent program should listen to the resultsAQ to get the results back from BPEL.
Option 2 is a relliable design.
--Prasanna