Correlation in BPEL

Hi,
I was trying out a requirement in BPEL. I need to create a correlation set with a value that I generate within the process .
I see that, when u define the correlation(property alias) it is mandatorily related to a message type and the Xpath points to a variable in the payload.
What if I want the variable to be from an internal scope variable that is generated during the process.
Is there an option to modify the correlation set property value, dynamically from within the process , once it has been initiated. Hope the Question is clear.
Thanks.

Hi
Both the above URLS are not working fine. They are not showing the sample demos, when clicking on it.
It is redirecting to the other page.
Can anybody any other URLS other than this.
Regards,
CH

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Correlation In BPEL Process

Hi All,
Can anybody can guide where we can a best example for correlations if we want to perform through. Can anbidy can share a link
on correlations for practice purpose because i have requriement which is based on the correlations and as I don't know how to implement
the correlations in BPEL process.
Regards,
Ch

Hi
Both the above URLS are not working fine. They are not showing the sample demos, when clicking on it.
It is redirecting to the other page.
Can anybody any other URLS other than this.
Regards,
CH

Correlation Exception - BPEL - Proxy Service and Business Service

Hi All ,
Correlation exception
Flow - BPEL - Proxy - Business service
We are invoking a proxy service from a bpel process with a correlation set(property set as Yes)) and it works absolutely fine when the service is available But the problem occurs when the service is down or a remote fault occurs.
In the fault policy we had an action saying that retry three times but when it retries three times with the same correlation set
<Action id="ora-retry">
<retry>
<retryCount>3</retryCount>
<retryInterval>2</retryInterval>
<exponentialBackoff/>
<retryFailureAction ref="ora-human-intervention"/>
<retrySuccessAction ref="ora-terminate"/>
</retry>
</Action>
It was throwing an correleation exception.
since it was hitting the service wth same correletion set it was throwing an error. Is there any way i can retry for the same service with out exception
Thanks,
Raja
Edited by: user12893766 on Oct 1, 2010 3:30 AM

1. No it can be any kind of request: binary, text, xml...
2. ALSB support a lot of different transport/protocols:
EMAIL, FTP, FILE, HTTP, JMS, EJB, TUXEDO. In ALSB 3.0 we will add support for ERPs: SAP, SIEBL ..., MQ native and SFTP
3. It depends on the transport. For example for file, the client drops a file in the file system, for http it opens a http connection to the URL http://host:port/address etc...
4. TCP/Socket transport is provided as a sample transport in ALSB 2.5 and 2.6. You can look in the weblogic92/samples/servicebus folder. You can also write your own transport if you like. There is a public SDK.

Related to BPEL Correlation in Oracle soa suite 11g?

When we are working with Correlations in BPEL where the correlation information will be saved in composite or DB ?

937471 wrote:
When we are working with Correlations in BPEL where the correlation information will be saved in composite or DB ?Why is this relevant? What are you trying to achieve here?

BPEL Correlation

Hi All,
I want to do some hands on in BPEL correlation. Can anyone suggest me where i can find about the basics of correlation concepts and tutorial on using Correlation in BPEL? Any help appreciated.
Thanks & Regards,
Ayyadurai

one of these?
http://blogs.bpel-people.com/2009/04/writing-singleton-bpel-process.html
http://swapnil-soa.blogspot.com/2008/01/correlation-this-post-would-effort-to.html
hth,
Peter Paul

Correlation for asynchronous system via websphere MQ from a BPEL client

I could able to find samples for correlation in BPEL while invoking asynchronous webservices.
Query 1. Are there any samples for Correlation while invoking asynchronous system via websphere MQ from a BPEL client?
Eventhough I could see some BPEL samples under "\bpel\samples\tutorials", there is no documentation corresponding for each scenarios.In the BPELdeveloper manual, it has been mentioned to see the documentation available in the corresponding directories for instructions on running these tutorials.But there are no such documentations in it.
Query 2.Can anybody suggest on this regarding documentation especially for the 113.ABCARouting tutorial.

I understand the MQadapter inconsistency is my problem. Besides that below I have presented some more details regarding what I configured in BPEL...
MQ adpater(Synchronous Get msg from MQ and send reports) ----> receive1---->Assign1----> Invoke1------->MQ adapter(Asynchronous send msg to MQ and get reports) -----> Receive2 ----> assign2 ---->reply1 ---->MQ adpater(Synchronous Get msg from MQ and send reports) .
The MQ adapters has been configured for opaque schema. I was constructing the above flow step by step..(Initially with an MQput adapter instead of asynchronous mq adapter and ensured correct operation of messages). Then modified with asynchronous adapter and posted a message. Now the message got strucked at assign1 itself. The error instance in Assign_1 is below...
<selectionFailure xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/"><part name="summary"><summary>empty variable/expression result.
xpath variable/expression expression "/ns3:opaqueElement" is empty at line 75, when attempting reading/copying it.
Please make sure the variable/expression result "/ns3:opaqueElement" is not empty.
</summary>
</part></selectionFailure>
Sorry for the paining you .....I may be wrong at some point as I am new to this IT field.

Error:SCAC-50012 while deploiyng BPEL from JDeveloper 11.1.1.5

Hi,
Jdeveloper encounter Error: SCAC-50012 after I add correlation into BPEL. Process (asynchronous) is very simple 2 invokes and 1 pick with onMessage and onAlarm branches.
When I remove correlation set from pick (onMessage which receives an event) activity problem disappear.
What can I do to add correlation and cancel this error?
12.3.2012 15:28:53 oracle.fabric.common.wsdl.SchemaManager isIncrementalBuildSupported
INFO: XMLSchema incremental build enabled.
12.3.2012 15:28:59 com.collaxa.cube.CubeLogger info
INFO: validating "process.bpel" ...
oracle.jrf.UnknownPlatformException: JRF is unable to determine the current application server platform.
     at oracle.jrf.ServerPlatformSupportFactory.getInstance(ServerPlatformSupportFactory.java:79)
     at oracle.integration.platform.blocks.WLSPlatformConfigurationProvider.<clinit>(WLSPlatformConfigurationProvider.java:44)
     at oracle.integration.platform.blocks.FabricConfigManager.<clinit>(FabricConfigManager.java:155)
     at oracle.integration.platform.blocks.xpath.FabricXPathFunctionResolver.loadXpathFunctions(FabricXPathFunctionResolver.java:271)
     at oracle.integration.platform.blocks.xpath.FabricXPathFunctionResolver.loadXPathConfigFile(FabricXPathFunctionResolver.java:153)
     at oracle.integration.platform.blocks.xpath.FabricXPathFunctionResolver.init(FabricXPathFunctionResolver.java:51)
     at com.collaxa.cube.xml.xpath.BPELXPathFunctionNameResolver.loadFabricXpathFunctions(BPELXPathFunctionNameResolver.java:57)
     at com.collaxa.cube.xml.xpath.BPELXPathFunctionNameResolver.<init>(BPELXPathFunctionNameResolver.java:48)
     at com.collaxa.cube.xml.xpath.BPELXPathFunctionNameResolver.<clinit>(BPELXPathFunctionNameResolver.java:44)
     at com.collaxa.cube.lang.compiler.bpel.XPathExprValidatorVisitor.<init>(XPathExprValidatorVisitor.java:122)
     at com.collaxa.cube.lang.compiler.bpel.AssignValidator.<init>(AssignValidator.java:89)
     at com.collaxa.cube.lang.compiler.bpel.BpelParser.<init>(BpelParser.java:452)
     at com.collaxa.cube.lang.compiler.bpel.BPELValidator.validate(BPELValidator.java:60)
     at com.collaxa.cube.lang.compiler.BPEL1Processor.validate(BPEL1Processor.java:329)
     at com.collaxa.cube.lang.compiler.BPEL1Processor.process(BPEL1Processor.java:153)
     at com.collaxa.cube.lang.compiler.CubeParserHelper.compile(CubeParserHelper.java:47)
     at oracle.fabric.bpel.bpelc.BPELComponentValidator.validate(BPELComponentValidator.java:40)
     at oracle.soa.scac.ValidateComposite.validateComponentTypeServicesReferences(ValidateComposite.java:1117)
     at oracle.soa.scac.ValidateComposite.doValidation(ValidateComposite.java:500)
     at oracle.soa.scac.ValidateComposite.run(ValidateComposite.java:150)
     at oracle.soa.scac.ValidateComposite.main(ValidateComposite.java:135)
Thanks for advance.

Hi, maybe these two posts can help u:
Error when deploying AIA Demo BPEL project to SAR file
http://11gsoasuite.blogspot.com/2011/09/jrf-is-unable-to-determine-current.html
best
rolando

BPM processes,receiving signals (events) & correlation to existing instance

Hi,
BPM 11g/SOA Suite 11g (R1 PS2)
I am wondering whether it is possible to receive signals (EDN events) into a running process instance. The documentation describes how a process can be started by an event. I would like to be able to feed an event (signal) into a running process (just like we do with correlation in BPEL processes). Is that possible - and if so, how?
Along the same lines, can BPM processes receive messages through externally exposed WebService operations - into correlated process instances? For example: I have started the process to create a new employee in the organization and I want to inform the process instances taking care of this employee that she will start on a later date than originally assumed (or not at all because she has accepted another job). I know the unique employee id for this new hire. How can I configure the BPM process such that this incoming call after the instance has started is fed into a Receive activity in the process instance working on this employee?
Maybe a similar is question would be: can a message catch event be used without a corresponding message throw event - to catch incoming messages asynchronously and not related to a message sent by the process instance.
thanks very much for your insights,
Lucas

I also tried DB Adapters and it is not working for my scenario. Needed help/pointers from a BPM Guru \.
As per my business scenario, If there any update in the database (offline approval. not using worklist) then i should complete the running BPM process for approval.
1. To achieve this, I created a adapter to poll and it is working in polling. What is not working is picking the update in process and mark is closed/complete.
2. I tried using Catch Event with continuation mode (but it needs throw event to begin with).
3. I also tried ‘Receive event’, which also needs start event for continuation.
4. If i use Initiate mode for catch event then it initiate a new process and mark it close and does not do anything with original process (having this catch event). This catch event is still waiting.
5. If i use “receive” event with Initiate mode then jdeveloper is giving compilation time error saying that some service is not referenced in composite.
6. I have also tried other options of using “Sub-process” or another process and invoking it but nothing seems to work.
Any help/pointers? Thanks a lot.

Correlation in mediator

HI All,
I have a Synchronous mediator component calling asynchronous BPEL Service component.
Can anyone let me know how the mediator performs correlation of BPEL Callback responses?
Thanks

If you are thinking about correlation sets then I would say that it is BPEL specification feature and available only in BPEL. Mediator does implicit correlation for async request/callback scenarios.
It would be helpful if you can explain the usecase you are trying to achieve.
regards,
Sandeep

JMS Correlation Issue

Hello
I actually stole some of the text of this question from a previous post. The post hasn't had any activity for over a month, so I thought I would repost as I need a solution. I have modified it to my situation.
I need to implement following scenario in my BPEL process:
1. BPEL enqueues using JMS Adapter message to queue 1. (Invoke activity)
2. BPEL dequeues using JMS Adapter message from queue 2. (Receive activity)
I need to correlate this two actions. How do I do this? I have tried the following with no success.
1. BPEL produces messages on queue 1 with JMS corr_id header variable set
2. Program dequeuing from queue 1 stores corr_id value in database.
3. Program finishes processing work and produces message on queue 2 specifying corr_id from value stored in database.
4. BPEL consumes message from queue 2. Here it is not working. The correlation does not seem to be happening.
Any ideas?
Thanks
Kirk

I think you need to define the correlation/correlation sets in BPEL Invoke and receive activities. The correlation identifier can very well be the JMS corr_id field value. I think what you tried is JMS message correlation as opposed to correlation in BPEL processes.
I haven't tried this myself. So my suggestion is purely conceptual.
HTH
Rajesh

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.

Correlation for JMS Messages possible? JMSCorrID in JMSHeader not accepted

Is Correlation for communication over JMS messages possible?
If I define the JMSHeader field "JMSCorrelationID" in a correlation set ("as usual") then I get
compiler errors:
Error ORABPEL-10036: invalid correlation set
BPEL seems not to accept JMSHeader fields for correlation but only fields from the actual payload msg.
Is this true?
Is there soemwhere a guide on how to correlate JMS messages?
Thank you
Michael

you can use the "Message Selector" on the JMS adapter to filter to achieve that;
here is extract from oracle help document
Message Selector
Specify filtering logic that enables you to receive messages that match a certain criteria. Enter an expression between 1 and 255 characters in length. Use SQL92 syntax in this field. The JMS server uses this criteria to filter messages received by this consumer. The message selector works with variables defined in standard JMS headers and user-defined properties. You cannot use variables or elements that are in the payload of the message.
For example, you can enter logic such as: JMSPriority > 3. Based on this, messages with a priority greater than 3 are consumed; all other messages are rejected. JMSType = 'car' AND color = 'blue' AND weight > 2500 Country in ('UK', 'US', 'France')
it's got some limitations but works fine for our requirements so far...

Correlation and multiple branches with flowN

Hi All,
I would like to ask a question about correlation.I am trying to spawn "n" processes (Process B) from a master process(Process A), and than collect the responses from these instances.I have an array as an input to Process A, and have a flowN activity.In this activity,I simply perform an assign(to assign the varible in the array by an index, to the input variable of invoke), an invoke and a receive activities.
I have added correlation to the invoke as initiate correlation, and I added the same set to the receive activity.When I run the sample, unfortunately I get "Cannot initiate a correlation set more than once." error and the process is cancelled.In fact, the values for each array iteration is different, so I would expect to initiate n correlations for my waiting receive activities.
Am I doing something wrong or isn't that the way it has to be done?

No, I have inserted a scope into flowN sequence and defined a scope variable to use.From the audit trail, I can see I have successfully assigned the array variable to the scope variable.For an input of 2 list elements,the first flowN branch is successfully completed but the second branch has a faulted invoke with the message:
"Cannot initiate a correlation set more than once."
If I remove the correlation sets from the invoke and receive and leave the correlation to BPEL Engine, I get the following message:
Conflicting receive.
Another receive activity or equivalent (currently, onMessage branch in a pick activity) has already been enabled with the partnerLink "CalleeProcess", operation name "onResult" and correlation set "" (or conversation id). Appendix A - Standard Faults in the BPEL 1.1 specification specifies a fault should be thrown under these conditions.
Message was edited by:
Caglar Kara

Correlation set "Correlation_set" is not initialized. It cannot be used in a receiving activity. Fault is thrown.

Hello,
My bpel goes something like this:
Main processing
Receive activity (associated correlation set with initiate set to Yes)
on Event - activity 1
Receive activity is main. If I keep activity1 correlation set - initiates as Yes. then process will work but onEvent - activity1 will create new instance and will not update existing instance.
To update the existing instance, I nned to make its instantiate value as "No".
After changing instantiate value to "No", When the BPEL process is started, with the first message (main receive activity), I get the following error message:
Correlation set "Correlation_set" is not initialized. It cannot be used in a receiving activity. Fault is thrown.
Is there something I am missing?
Thanks,
Amit Pamecha.

Hi Amit,
Please refer the following section in SOA Developer Guide.
Using Correlation Sets and Message Aggregation - 11g Release 1 (11.1.1.7)
Also Refer the following sample for use of correlation sets.
bpel-305-InboundCorrelationShows how to perform message correlation within BPEL
http://java.net/projects/oraclesoasuite11g/downloads/download/BPEL/bpel-305-InboundCorrelation_1.2.zip

Correlations.

Sorry, bpel gurus,
I'm not a technical guru in anything. All I learn (in the Oracle world) takes me more time than the average.
I'm trying to understand the "correlations" in bpel.
I've read the Tutorial 13 of the bpel installation and the chapter 14 of my new book "Oracle Soa suite developers guide".
I think I understand what the correlations are for and I've seen how they can be designed with jdeveloper, but I'm missing something in the middle I can't find a clear example with a detailed explanation to understand the whole process. I still do not see the thing I need to understand the topic.
Please any help would be appreciated.
Juanje

The example Marc gives is very good but might lack a real world example.
Hope this may provide more help on the matter.
Where I see correlations used mostly is in work flow type BPEL processes. A human task is an example of correlations in use, e.g. a async call is made to the human task engine, then the process waits for a response back, this may take time for the human response to return. When the human responds the BPEL process continues. This is what we call correlation, e.g. how did BPEL know which process to respond to?
The good thing about human tasks is that BPEL manages the implementation of correlations automatically. It also does this when calling another async BPEL process. When you are calling a service that is external to BPEL you need to implement correlation sets. In short what you do here is identify a unique element in your payload, this is used for reference for the response. The external system must provide the same unique element for the correlation.
Real life examples where is could be implemented is when asking for a quote from external systems. This may take some time to complete but is is all part of the business flow.
cheers
James

Correlation in BPEL

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