Please advise regarding implementing pub/sub in a BPEL process.

Hi guys,
Requirement
The customer information comes as HTTP/SOAP message and is sent to the BPEL process as input. BPEL uses ESB and database adapters to create the customer in Oracle apps. Now, we need to send the same customer information with the Oracle apps customer number to some other systems. The number of systems is not know at this time, so we need a pub/sub mechanism where we can publish the customer creation event with the required parameters (customer name, number, etc.). Then we just create subscriptions to that event as an when required. This gives us the flexibility to add subscriptions withougt changing the initial BPEL process.
My questions
I can think of three ways to do this, please advise.
1. Use Oracle workflow business events and subscriptions. At the end of the BPEL process, raise the wf event and the subscriptions to that will be processed by workflow engine. My doubt here is that most of the times the subscriptions is another BPEL process, so does it make sense to go from BPEL to WF and then WF to PL/SQL to invoke a new BPEL?
2. Use Advanced Queues (Oracle AQ). This is similar to using Oracle WF and to me the issues are also the same.
3. Use routing rules in ESB -- I am not really sure if this can be done to replicate a pub/sub scenario, please advise and elaborate.
As a summary, we want the ability to have pub/sub within BPEL and/or ESB. Any other suggestions are also welcome.
Thanks!

I have the same question , but could not find the releveant post in ESB forum.. is the response posted ? pls post the link to that thread...

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A question regarding Synchronous, Pub-Sub non-durable model

          Scenario:
          Non-durable, publish-subscribe, syncronous model.
          Publisher1 and Publisher2 both post messages to a Topic at the same time. How to
          design the non durable Subscribers that would be able to obtain both these messages
          in the same thread?
          e.g. if i in my program I create 2 subscribers, with selectors configured for the
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          2. create sub2 using selector2 for topic1
          3. sub1.receive(timeout)
          4. sub2.receive(timeout)
          5. further processing using both the obtained messages
          6. program end.
          In the above case, if messages arrive at the same time in the topic, only sub1 will
          be able to get the message, as sub2 won't be active at that time.
          Is there anyway to acheive this considering Synchronous, Pub-Sub non-durable model
          is to be used?
          Many thanks...


          Thanks for the response.
          Is a subscriber active the moment it is created?
          e.g. objSub=tsession.createSubscriber(topic,strMessSelector,true);
          or it is said to be active when we call
          objSub.receive() (in case of synchronous subscriber)
          "Shean-Guang Chang" <[email protected]> wrote:
          >I don't know the details of the design. You can use a single subscriber
          >without a selector and then do two receive to get both message.
          >If you have to use selector so sub1 can only select message from pub1 and
          >sub2 can only select message from pub2 then you need sub3 without a
          >selector and sub3 will do blocking receive first and then once the sub3
          >receives a message you can use sub1 and sub2 to do receiveNoWait.
          >
          >e.g.
          >while (true) {
          > if (sub3.receive() ! = null) { // have message in the topic
          > if (sub1.receiveNoWait() != null) { // got message from pub1
          > do something
          > }
          > if (sub2.receiveNoWait() != null) {// got message from pub2
          > do something
          > }
          > }
          >}
          >
          >"vinay s" <[email protected]> wrote in message
          >news:[email protected]...
          >>
          >> Scenario:
          >> Non-durable, publish-subscribe, syncronous model.
          >> Publisher1 and Publisher2 both post messages to a Topic at the same time.
          >How to
          >> design the non durable Subscribers that would be able to obtain both these
          >messages
          >> in the same thread?
          >> e.g. if i in my program I create 2 subscribers, with selectors configured
          >for the
          >> 2 different messages...
          >>
          >> program start
          >> 1. create sub1 using selector1 for topic1
          >> 2. create sub2 using selector2 for topic1
          >> 3. sub1.receive(timeout)
          >> 4. sub2.receive(timeout)
          >> 5. further processing using both the obtained messages
          >> 6. program end.
          >>
          >> In the above case, if messages arrive at the same time in the topic, only
          >sub1 will
          >> be able to get the message, as sub2 won't be active at that time.
          >>
          >> Is there anyway to acheive this considering Synchronous, Pub-Sub
          >non-durable model
          >> is to be used?
          >>
          >> Many thanks...
          >
          >

Implement callback for an asynchronous BPEL process through Java

Hi ,
I am trying to implement a callback functionality for an asynchronous BPEL process through java.
I found the code in the samples folder of SOA suite installation folder .
<SOA_HOME>\bpel\samples\tutorials\102.InvokingProcesses\rmi\com\otn\samples\async.
There is an AsyncInstanceWatchdog object which registers a callback object(in this case an object of AsyncCallbackImpl class) for a specific CONVERSATION_ID.
String convId = GUIDGenerator.generateGUID();
nm.setProperty(NormalizedMessage.CONVERSATION_ID, convId);
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locator.getDomainAuth());
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watchdog.start();
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WARNING: Exception returned by remote server: {0}
ORABPEL-02118
Variant not found.
The variant "output" has not been declared in the current scope. All variants must be declared in the scope before being accessed.
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at com.collaxa.cube.engine.core.Scope.getVariantRV(Scope.java:535)
at com.collaxa.cube.engine.CubeEngine.getFieldValue(CubeEngine.java:2668)
For your reference the variable output is declared in the definition of AsyncCallbackImpl (which implements the IAsyncInstanceCallback interface).
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public void onResult(Map pResultMessage) {
System.out.println("called back! ");
Iterator iTest = pResultMessage.keySet().iterator();
while (iTest.hasNext()) {
String key = (String)iTest.next();
System.out.println(XMLHelper.elementToString((Element)pResultMessage.get(key)));
public String getVariableName() {
return "output";
The variable name is same given in the sample code. And the BPEL process returns variable named output. So the name should not be a problem.
Is it because of the scope of the variable.. If so, how do I change it.
Any help would be appreciated.
Edited by: saptarishi on May 25, 2010 4:24 PM
Edited by: saptarishi on May 26, 2010 4:45 PM

Solved it by some googling .... :)
Here is the link:-
[http://abhishek-soablog.blogspot.com/2008/09/orabpel-02118.html]
or
[http://beautifulwaste.blogspot.com/2008/04/calling-asynchronous-bpel-process.html]
Both gives the same solution..
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In 10.1.3.3 or later, this behaviour changed for performance reasons so that the default behaviour is now, not to keep any global variables for a BPEL process once the BPEL process has completed.
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<BPELSuitcase>
<BPELProcess src=".........." id="...........">
<configurations>
<property name="keepGlobalVariables">true</property>
</configurations>
</BPELProcess>
</BPELSuitcase>
Thanks
saptarishi

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Please advise regarding implementing pub/sub in a BPEL process.

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