Synchronous/Asynchronous BPEL Correlation

Is this possible?
When a message has to correlate with a BPEL process in a clustered environment of 2 nodes where both of them are active/active and a process instance that is capable of correlating with the message is waiting on one node, where as the message gets routed to the other node and a duplicate copy of the process starts on the other node joins and correlates with the message, and completes the processing on the other node. where as process instance on the first node times out after syncMaxWaitTime.
Server: 10.1.3.4 OC4J

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1.When we can create synchronous bpel process
Synchronus process need to create in case if you are expecting reply Immediately.
ex. this is usefull in case if you are using Database adapter as partner link in BPEL process. Because database Adapter operation used to give reply immediately.
2. When we can create asynchronous bpel process
Asynchronus process need to create in case if you when reply will come is not having time limit.
Example:- Suppose if you have one loan process in which we are invoking some of the webservices(ex United Star Loan, HDFC loan) which will send the intrest charges in reply but in this case reply can come at any time. Till that time BPEL process need to wait for indefinite amount of time. If Sync BPEL process will be used in the above case then the BPEL process will time out and that will come under faulted state.
3.When we can create empty bpel process
Define Service Later: Select to create an empty BPEL process service component with no activities.

Similar Messages

Correlation in Asynchronous BPEL process

I have thoroughly read docs & various blogs for this correlation concept and I am developed the bpel process without any compilation error. But when I execute, all the instances are waiting in receive activity with message *"Waiting for "processResponse" from "AsynchBPELProcess3.AsynchBPELProcess1.PartnerLink1". Asynchronous callback."*
My scenario goes like this, I have three simple Asynchronous BPEL process with flow A --> B --> C i.e;
step 1) client invokes process A with initial inputs
step 2) process A does some assignment and invokes process B and then followed by a receive activity to receive response back directly from process C
step 3) process B simply invokes process C after some assign activity
step 4) process C do actual task for computation -- this is from where i am expecting output result at process A
Done correlation at process A's recieveInput activity & in additionally added a receive activity to get response.
Flows works as expected....everything if fine. But only at the time of returning the output result back to process A ..this waits for long time and after some time it becomes stale.
Thanks.

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.
Let me know if you have any questions.
Thanks
Ramana.

A Synchronous answer from Asynchronous BPEL (How to?)

Good Afternoon!
A have an asynchronous BPEL with an exposed webservice.
I need BPEL get back a some kind of information at the moment he was called (e.g. a Conversation ID). And then continue his own asynchronous process.
Is it possible?
Tank You!

I have tried:
A Reply. i put a reply exactly after receive input - nothing. BPEL exposed service is defined as asynchronous, so it has not any definition in wsdl for reply answer.
A Callback. i put a callback and return back an assigned Coversation ID. It works good. But it is another callback operation.
May be there is a possibility to return back not in some next activity but exactly in BPEL start moment?
I will describe why i think its possible.
When you call any async webservice you can receive an exception in this moment (if webservice doesnt exist) or you can also receive a "nothing" (if webservice exist and it started to work). In any way you receive in back ground some kind of system information from Application Server that tells you - are you successfull in webservice calling or not.
And this is not a callback. Its something else. Its some kind of server synchronous answer.
And I am thinking, is it possible to use this system answer to send back some technical info about BPEL?

Can an synchronous ESB process initiate an asynchronous BPEL process?

I have a requirement to create a synchronous ESB service that initiates an aysnchronous BPEL process returning a success message to the requesting system.
I can create an esb that receives a paylaod from the requesting system and returns a receipt message, I then created an asynchronous bpel process.
Although I can initiate the asynchronous bpel process from the ESB I cannot work out how to send back the success message? The routing rules do not allow setting of outgoing messages unless you call a synchronous process?

Can you make the BPEL process synchronous. Calling a asynchronous process breaks your synchronous message, because what happens if your asynchronous process takes longer that 1 minute. The synchronous process will timeout but the asynchronous process will complete.
The previous note is correct you can use queues but all this will do is tell you that you posted correctly, you get the same result calling a web service. Asynchronous is fire and forget in a ESB world as it is stateless.
cheers
James

Asynchronous bpel proces seems to reply synchronous

I have made a bpel proces which is triggered by a synchronous webservice. The process is triggered, I fill the reponse and reply to the service to let it know we received the message. After this I process the message which takes some time. The problem is that the reponse is only received when the proces is completely done! When I look at the flow in debug it returns the reply but in SoapUI it times out because the rest of the process takes quite long. Why don't I receive the reponse back immediately when I reply?
Best regards!

4.How to deploy a project using a script?
http://jianmingli.com/wp/?p=2584
1.When we can create synchronous bpel process
Synchronus process need to create in case if you are expecting reply Immediately.
ex. this is usefull in case if you are using Database adapter as partner link in BPEL process. Because database Adapter operation used to give reply immediately.
2. When we can create asynchronous bpel process
Asynchronus process need to create in case if you when reply will come is not having time limit.
Example:- Suppose if you have one loan process in which we are invoking some of the webservices(ex United Star Loan, HDFC loan) which will send the intrest charges in reply but in this case reply can come at any time. Till that time BPEL process need to wait for indefinite amount of time. If Sync BPEL process will be used in the above case then the BPEL process will time out and that will come under faulted state.
3.When we can create empty bpel process
Define Service Later: Select to create an empty BPEL process service component with no activities.

How to change the asynchronous bpel to synchronous pbel

Hi All,
Let me know how to change the asynchronous bpel to synchronous pbel or synchronous pbel to asynchronous bpel.
thanks in advance..
Hari

HI,
Hi go through this link.
It is explained there with mnute details.
http://suryaveer-chauhan.blogspot.com/2007/06/converting-synchrous-bpel-process-to.html
Thanks
Akshay

Invoking asynchronous BPEL process from java ui

Hi,
I am invoking an asynchronous BPEL process from java ui.
I read somewhere that i can obtain an instance handler uing the lookupInstance() method of class Locator using the conversation id provided by the class NormalizedMessage.
My code looks like this
// Connect to Oracle BPEL server
Locator locator = new Locator("default","bpel");
IDeliveryService deliveryService = (IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME );
// Construct a normalized message and send to Oracle BPEL Process Manager
NormalizedMessage nm = new NormalizedMessage();
nm.addPart("payload", xml);
// Initiate the BPEL process
deliveryService.post("MyLoanFlow", "initiate", nm);
//Obtain the instance handler
IInstanceHandle handle = locator.lookupInstance(NormalizedMessage.CONVERSATION_ID);
But this is giving the error - can not find any instance with conversation id 'conversationId'.
Also, if i try to obtain a list of instance handles associated with a process , it does not contain the most recently created instance
IBPELProcessHandle ph = locator.lookupProcess("MyLoanFlow");
IInstanceHandle[] iHandler = ph.listInstances();
out.println(iHandler.length + "<br>");
if i invoke the process for the first time the output is 0.
can you please help me. it is urgent.

Hi Sudipto,
Regarding your second question,
deliveryService.post("MyLoanFlow", "initiate", nm);
IBPELProcessHandle ph = locator.lookupProcess("MyLoanFlow");
IInstanceHandle[] iHandler = ph.listInstances();
out.println(iHandler.length + "<br>");
---- returns 0 ---
This is because MyLoanFlow is an asynchronous process in your case. So the control is returned to your java block immediately after the request for a new instance is posted. And your second line of code(querying for the list of instances) is executed even before the instance is created on the server side. You can verify this in two ways:
1. try creating an instance of a synchronous process using IDeliveryService.request - this will always result in the increment since the current thread is blocked till the new instance is created.
2. for your case, you can try
Thread.currentThread().sleep(500); - just allow the server some time for completing the instance before you query it for the list of instances..
and wrt question 1,
//Obtain the instance handler
IInstanceHandle handle = locator.lookupInstance(NormalizedMessage.CONVERSATION_ID);
But this is giving the error - can not find any instance with conversation id 'conversationId'.
For setting the conversationId, you could do so by including the following inside your .bpel file
<bpelx:exec name="test-setConversationId" language="java" version="1.4">
<![CDATA[
setConversationId("conversationId");
]]>
</bpelx:exec>
The code:
IInstanceHandle ins = locator.lookupInstanceByConversationId(NormalizedMessage.CONVERSATION_ID);
should fetch you the required instance in this case.
HTH,
Anuj

How to get response from an asynchronous BPEL process in Java

I'm experimenting with BPEL and doesn't seem to be able to get response from an asynchronous BPEL process. Here's the deal:
I have a BPEL process that takes a string as input, and gives another string as output. This is a asyncronous process.
I want to initiate this BPEL process as a web service so I generate a Webservice Proxy in JDeveloper 10g (10.1.3.0.4). The function to call the process is now called "initiate" and takes three arguments: the input string, a "org.xmlsoap.schemas.ws._2003._03.addressing.EndpointReferenceType replyTo" and a
"org.xmlsoap.schemas.ws._2003._03.addressing.AttributedURI messageID".
HTTP-Analyzer shows that invoking the BPEL process with initiate("somestring", null, null) results in sending a SOAP message to the BPEL process, which returns a "202 Accepted". How do I get the response from the process? My intuition tells me that I have to use that second argument, that EnpointReferenceType thing. How do I use that?
Another question: If a asynchronous BPEL process does not exists (so the endpoint does not exist) the Java proxy does not throw an error when runned. It does not even sends a message. It exits with status 0! (This happens for example when deploying a new version of a process and when the "old" version is undeployed). Calling a non-existing synchronous BPEL process, the Java proxy DOES throw an error.

Clemens,
That all sounds logical. But somehow it is still a mystery for me ... Somehow I don't see what should be done.
To call the async BPEL process I have the following procedure:
initiate(String input, org.xmlsoap.schemas.ws._2003._03.addressing.EndpointReferenceType replyTo, org.xmlsoap.schemas.ws._2003._03.addressing.AttributedURI messageID)
The first argument is the input for my BPEL process. The second is the address to a webservice that should handle the callback, right? The third is a messageID (makes sense, but why of the type AttributedURI?).
Here lies my problem. It is not clear to me how these EndpointReferenceType & AttributedURI work. I can't find anything on the net about it. The AXIS examples as where mentioned earlier use other types (namely the "org.xmlsoap.schemas.ws.addressing.MessageID" and "org.xmlsoap.schemas.ws.addressing.ReplyTo") which are completely different.
What I did so far:
- I created an webservice proxy that listens on the onResult endpoint of the BPEL process.
- I created an webservice proxy that calls the BPEL process through the initiate procedure, but it is not completely clear to me how to construct the EndPointreferenceType replyTo, and the MessageID. I did something like this:
EndpointReferenceType replyTo = new EndpointReferenceType();
// callback service running on local machine
// This URI class is the java.net's version
URI replyToURI = new URI("http://vaccinatie:8988/syncro-callback-context-root/stringconcatCallbackBindingPort");
// This AttributedURI is the org.xmlsoap.schemas.ws._2003._03.addressing's version
AttributedURI address = new AttributedURI();
// the only public methos that made sense to me:
address.set_value(replyToURI);
replyTo.setAddress(address);
// call the BPEL process
myPort.initiate("test123", replyTo, address);
But the above doesn't work (largely because I don't know what I'm doing here prob.:-) ) It does send the "test123" message, and the BPEL process does process it, but I don't seem to get the callback right.
I hope this makes my problems somewhat clearer. I hope someone can help me, because I'm just a beginner in this whole "web service area" and seems to do something terribly wrong here, because it should be very simple. Thx.

Database polling adapter within an asynchronous BPEL process

Hi,
I have a requirement to poll a database table withing an asynchronous process. The reason I want to use a receive within an asynchronous BPEL is because the process needs to be notified many times thru polling. So might need many receive activities.
I have developed a process as described below :-
1. Created an asynchronous process.
2. Created a Database adapter for polling a table. Logical delete strategy is being used.
3. Have put a receive activity from the DB Adapter created.
4. Created a correlation set consisting of a single property(String)
5. Created a property alias to refer to
a. the input string of the asynchronous process. (unique for this process)
b. the input from the database adapter (unique for this process)
I initiate this process from the console. Then I inserted a record the table with proper inputs.
But the BPEL waits indefinitely at the receive activity.
When I try to poll the table from an empty BPEL process, it works perfectly fine.
Could someone please help me here.
Thanks in advance
Saptarishi

Hi,
Could someone pls answer this query.
Regards,
Saptarishi

Throwing a fault from an asynchronous bpel process

Hi,
can anyone please let me know how i can throw a fault to the calling client from an asynchronous bpel process?
(synchronous bpel uses the fault of the reply activity to do the same - i want a similar thing in a callback-invoke of an asynchronous process or any other way to do it if at all)
please let me know if it is possible becoz it was a requirement put forward by a customer and i just want to develop a proof of concept to the same.
regards,
pavan.

Hi,
I'm using BPEL process manager for calling a asynchronous web service,I can invoke the service from BPEL and the service is invoked correctly,but when I view the business process flow in BPEL Console my process is stopped at receive state and doesn't pass it.
Could anybody tell me if any thing should be set to receive a callback from an asynchronous web service to BPEL process?
Is it true that BPEL process receives a callback automatically (using a callback operation which I defined in my web service WSDL) on the same port type that normally receives the requested information, with an invoke activity?
So what could be wrong with my process or invoked web service that the BPEL process doesn't get any reply from my web service and remains in receive activity?
Thnx in advance,
Nasim

DBAdapter polling for new or changed records not issuing callback within an asynchronous BPEL process?

Hi,
I have a requirement to poll a database table withing an asynchronous process. The reason I want to use a receive within an asynchronous BPEL is because the process needs to be notified many times thru polling. So might need many receive activities.
I have developed a process as described below :-
1. Created an asynchronous process.
2. Created a Database adapter for polling a table. Logical delete strategy is being used.
3. Have put a receive activity from the DB Adapter created.
4. Created a correlation set consisting of a single property(String)
5. Created a property alias to refer to
a. the input string of the asynchronous process. (unique for this process)
b. the input from the database adapter (unique for this process)
I initiate this process from the console. Then I inserted a record the table with proper inputs.
But the BPEL waits indefinitely at the receive activity.
When I try to poll the table from an empty BPEL process, it works perfectly fine.
Regards
Kabir

Hi Kabir,
Please refer the following sample for your usecase.
Though Please be aware that one instance of BPEL process will correlate with only one message if you have one receive activity. Not all the messages tht DBAdapter polls.
bpel-305-InboundCorrelationShows how to perform message correlation within BPEL
Also Refer the following in Developer guide.
http://docs.oracle.com/cd/E28280_01/dev.1111/e10224/bp_correlate.htm#CHDFHAAE
If you want to keep polling and receiving the messages in the same BPEL process you might have to put the receive activity in a while loop construct. But as a design this is not a good design.
Can you elaborate your requirement to understand better and suggest better solution.

How to call a Asynchronous bpel process from a PLSQL procedure?

How to call a Asynchronous bpel process from a PLSQL procedure?

Hi,
You could do something smart and technical very spiffy with soap-stacks in the database and/or dbms_ws/dbms_http. But I allways find AQ with AQ-adapter the simplest. Let Pl/sql enqueue a message on an aq-queue and subscribe an aq-adapter process on it. That can call your async-bpel process. If you want to get answer back in pl/sql, let the aq-adapter process enqueue a response message on another queue or on the same queue with another consumer name. Give it a correlation-id that you provided in the payload of your request message. Your pl/sql process can then do a dequeue on that correlation-id. It will sit and wait until a message with that correlation id is enqueued on the queue.
Regards,
Martien

Issue with BPEL Correlation on Invoke 11g

The scenario is like...
One initial receive -> Invoke to a Web Service -> Receive from JMS Q -> End of the process.
I have applied BPEL Correlation on Invoke by creating property alias with Output Message Type.Pattern I have also used.
Now, when I run the composite, the instance is in error but no error message.
On the other hand, if I use the Input message type for correlation property alias, the BPEL process proceeds. But my requirement is to do the correlation on output variable of invoke which needs to be checked against receive input variable.
Can any one suggest some resolution here?
Thanks.

Hi,
Here the option what I can think of is that use some unique element that you passing in first invoke for correlation and customize the external service to ask them to have your passed value as part of their queue values, That way you can correlate the messages and once correlated based on unique value you match up the tokens.
Suggesting this work around as, correlation will always need token, which is passed as an input to the first Invoke. so defining correlation based on output token is not possible.
If you find something please do share.
-Umesh

Error while invoking an asynchronous BPEL process

Hi ,
I am trying to call an asynchronous BPEL process through java client.
Following is the code which I got from SOA bpel samples present in the following location
<SOA_HOME>\bpel\samples\tutorials\102.InvokingProcesses\rmi\com\otn\samples\async
The code fails while registering the callback
String convId = GUIDGenerator.generateGUID();
nm.setProperty(NormalizedMessage.CONVERSATION_ID, convId);
deliveryService.post("HelloWorld", "initiate", nm);
// register the callback
watchdog.registerAsyncCallback(convId, testAsyncHandler,
locator.getDomainAuth());
The error says java.lang.NoClassDefFoundError: org/collaxa/thirdparty/json/JSONString
I tried to search for this in google. But it seems noone has got this error or maybe noone has used this at all.
Maybe I am missing some jar file, but I am unable locate that.
Can someone help me in this please.

Hi,
These sort of class not found errors come when you are running from a client which does not have all the jar files requried to invoke BPEL using the client API.
org/collaxa/thirdparty/json/JSONString is orabpel-thirdparty.jar.
The complete list of Jar files you would need in the classpath are:
ejb.jar ($ORACLE_HOME/home/lib)
oc4j-internal.jar ($ORACLE_HOME/home/lib)
optic.jar ($ORACLE_HOME/opmn/lib)
orabpel-common.jar ($ORACLE_HOME/bpel/lib)
orabpel-thirdparty.jar ($ORACLE_HOME/bpel/lib)
orabpel.jar ($ORACLE_HOME/bpel/lib)
Hope this helps,
Regards,
Shanmu.
http://www.prshanmu.com/articles/

Unable to get callback from Asynchronous BPEL process to work (AXIS Client)

Hello,
I am calling an Asynchronous BPEL process from an AXIS client, and I am unable to get the callback functionality to work. The AXIS client code has been generated from WSDL2Java using the BPEL process' WSDL file.
I CAN insert an invoke node in the BPEL process and invoke my Callback web service using that, but obviously that means the BPEL process is limited to only responding to one pre-determined client, which won't work.
My questions:
- How does the BPEL process know what endpoint to use to make the callback?
- Do I need to modify the generated code to create a SOAP Envelope and invoke the process with the envelope, intead of the invokeOneWay call?
- If I do need to create a SOAP Envelope with a replyto element, what is the structure of a typical BPEL envelope? Is there an example somewhere?
I have looked at the examples in the interop directory, specifically the AXIS calling Async BPEL, but I would like to try to keep the client code as independent as possible (I don't really want to have a dependency on the OTN library).
Any help would be greatly appreciated!!
Thank you.
-Ryan

Please have a look at the Binding in the WSDL. Axis must provide the ReplyTo and
MessageId information there. As far as I see, this must be done by an Axis-Handler,
because the Binding-Part in not generated by WSDL2Java.
I was able to generate the JavaClasses by using the "WSDL2Java -a" option, but
I still do not see how to use them in a handler and how to register the handler.
Maybe someone can give me a hint.

Synchronous/Asynchronous BPEL Correlation

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