Correlation Set in BPEL (11G)

I was trying to learn the concept of correlation set and did a simple POC. built 3 simple service A,B,C. A -> B -> C -> A. Services A and C are asynchronous and B is one way. Service A has Invoke to B and a Receive from C. Defined Correlation set with appropriate property and Aliases (one with service B's Request Message type and another with service C's Response Message Type). Initiated the correlation set in Invoke from A -> B and set patter as 'IN' as the request is sent. Used the same correlation set for receive from A <- C with initiate set to 'NO'. When I tested this flow, I got an error "Correlation set no initialized.It cannot be used in receiving activity". Blindly going by the error message, initiated the correlation set at the first receive of service A. Now got no error but the process A is running for long time, pending receive response from C. I know this is not conceptually correct solution to overcome the initiate error in receive of A <- C. Can someone explain me what's the mistake am making here and a solution to complete this POC successfully?
Thanking in advance
Ranjani

Hello,
Sorry for late response.
I have 1 more question before that.
When C is replying then how does service 'C' knows that it is replying to service 'A'?
I'm asking this because B is 1 way service, but it is invoking service C which is asynchronous so at some point of time B is expecting a response from service C. On other hand if you have used both receive and reply activity in the flow of service C using same partner link then what it does is that it sends response back to service B. There is ReplyTo http header which comes in input request and based on URL present inside it, reply activity knows where to send response back. This case will require 2 partner links in service C. receive will be based on input from B and reply(A is not waiting for response since it did 1 way invocation to service B hence I think we should use Invoke activity here instead of reply activity to send response back to service A, will have to findout using POC) will be based on partner link for service A (Callback port).
Just try to explore on this direction once since I am currently away from my system. As soon as I get back, I will implement this POC in my system if it doesn't work. Meanwhile see if above direction works.
Regards,
Ankit

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Hi,
EveryOne,
Good day to all of you..
I am new to Oracle BPEL technology and during my course of study and understanding period, i thought of creating a process and i have a query regarding correlation in Oracle BPEL.
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Yes you can achieve this. There are many ways to get this, it depends on your design. I didn't try the correlation sets.
If i were you I would like to use the message header properties of the JMS queue. Set an MsgID for the request message and use the same MsgId to listen the response. You have to ask the partner to listen to your request message and store the KsgID and set the same MsgID to the header properties in response message.
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Thanks
Ramana.

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Hi.
I have process with two receive activity correlated by correlation set. But second receive wait for different message as initiation receive.
I created correlation set
<correlationSets>
<correlationSet name="OrderCorrelationSet"
properties="ns1:orderId_property"/>
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<bpws:property name="orderId_property" type="xsd:long"/>
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<bpws:propertyAlias propertyName="pns1:orderId_property" messageType="client:activationRequestMessage"
part="payload" query="/ns5:orderElement/orderRecord/ns2:orderId/ns2:orderId" xmlns:ns5="http://xmlns.oracle.com/activation/bpel/"
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ORABPEL-03813
Failed to evaluate correlation query.
Failed to evaluate the correlationAlias query "/ns5:activationPostpaidPushRequest/processid" on the element "oracle.xml.parser.v2.XMLElement@1e44d8f"
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Solution is:
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I had to add it manually
<bpws:propertyAlias propertyName="pns1:orderId_property" messageType="client:activationPushRequestMessage"
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Correlation Set in BPEL (11G)

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