Question: How to call a BPEL process from a PL/SQL procedure

Question

Hi All,
Greetings to all BPEL people. I have a question on how can we call a BPEL process from a PLSQL procedure. It might be a stupid question but i wanted to know whether this fetaure is available in BPEL as our scenario requires us to explore if this functionality is available in BPEL.
Please let me know and also if possible please send me the links for the tutorials if it is available.
Thanks In Advance,
Dibya

Answer 1

Yes u can do it. there are two ways.
1) First one is using utl_http package of PL/SQL
In this case u can create SOAP request message & send it as Http request to your deployed BPEL process.
This package provides some methods like
set_header,write_text,get_response,read_text etc..
Following is part of code which may be helpful to you.
create or replace package body test_book_order_sub_pkg
is
FUNCTION test_book_order_sub(p_subscription_guid IN RAW,
p_event IN OUT WF_EVENT_T
                                        Return VARCHAR2 IS
soap_request varchar2(30000);
soap_respond varchar2(30000);
http_req utl_http.req;
http_resp utl_http.resp;
launch_url varchar2(240) ;
     begin
     DBMS_OUTPUT.Put_Line('Subscription : Order has been booked');
     soap_request:='<?xml version="1.0" encoding="UTF-8"?>
     <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Header/>
<soap:Body xmlns:ns1="http://xmlns.oracle.com/BES_BookOrder">
<ns1:BES_BookOrderProcessRequest>
<ns1:input>725</ns1:input>
</ns1:BES_BookOrderProcessRequest>
</soap:Body>
</soap:Envelope>';
http_req:= utl_http.begin_request
('http://172.28.5.191:8888/orabpel/default/BES_BookOrder/1.0',
'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', 'initiate');
     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_respond);
return('SUCCESS');
end test_book_order_sub;
end test_book_order_sub_pkg;
2) Second way is make your BPEL process listening to some database Queue(use AQ Adapter). & then put some message in tht queue from ur Pl/SQL code . This will also initiate BPEL instance. Check out AQAdapter tutorials.
/mishit