How to do Async call in OSB message flow

I am calling a service from OSB layer synchronously and when this service gives a response, I am forming another request with this response and storing it in a variable now I want to call another service asynchronously by using this variable. Service call out is not supporting one way call.
Please suggest a suitable way to do this.

Use publish action. It is designed fire and forget type of use-cases
http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/userguide/modelingmessageflow.html
Manoj

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You can access the MQ transport headers in the assign/replace actions using the relative xpath of the $inbound variable. This is available for any transport.
Please find a snapshot @ https://dl.dropboxusercontent.com/u/19901533/access_inbound_mqheaders.JPG
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How to handle Asynchronous calls using OSB?
Please help me out??
-Venkat

Hello friend, here is what you need.
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How to convert XML to Binary in OSB Message flow

Dear All,
Can you please help me in converting XML to Binary in OSB Message flow.
Please help.
Thanks,

ah ok, then you have to apply a transformation from XML to some fixed length format, EDI style
probably you have 2 options: the traditional MFL
http://docs.oracle.com/cd/E13159_01/osb/docs10gr3/consolehelp/mfls.html
or the (probably) more supported nXSD with a JCA adapter
http://docs.oracle.com/cd/E23943_01/integration.1111/e10231/nfb.htm
I will let you digest this info and then we can continue.
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Functionality of IF in OSB message flow

Hi Team,
am just confused about the functionality of IF in OSB message flow, either in a proxy or in a split-join.
for example consider the following scenarios in if-then stage,
1. I write the condition as status="yes", then some process will be done.
2. but what if I write just status? what can be the functionality of IF here?
Please suggest the needful thanks in advance.
-Pruthvi Raj.

but what if I write just status? what can be the functionality of IF here?
Then the $status variable is evaluated. If it is not an empty sequence (), it is considered true (AKA exists).
In other words, if there is anything in the $status variable, it is true. Unless it is a boolean false, of course, but all variables in OSB are strings, so that is not going to happen.
Please note that Split-Join AKA Flow is a different codebase. Its variables are typed (vs strings in OSB), and hence if will behave differently for false value.
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Replacing default namespace in OSB message flow

I'm in the process of setting up a simple OSB proxy and could use some help figuring out how to change a default namespace in the response from the business service.
The proxy and business service use different namespaces which we'll call "http://foo.com/namespace/proxy" and "http://foo.com/namespace/business". In my routing request message flow, the contents of $body look like this and I'm able to use a Rename action with XQuery expression "./sof:*" to change "http://foo.com/namespace/proxy" to "http://foo.com/namespace/business":
<sof:Execute xmlns:sof="http://foo.com/namespace/proxy">
<sof:adminName>MyAdaptor</sof:adminName>
<sof:request>
[escaped payload omitted]
</sof:request>
</sof:Execute>
This works fine, but in the response message flow, I need to revert the namespace and am having difficulty because the response uses a default namespace instead of using a prefix:
<ExecuteResponse xmlns="http://foo.com/namespace/business">
<ExecuteResult>
[escaped payload omitted]
</ExecuteResult>
</ExecuteResponse>
If I define a prefix P2L in the expression editor to correspond to "http://foo.com/namespace/business", I'm able to reference the ExecuteResponse element as "./P2L:ExecuteResponse", but then I get stuck.
If I try use a Rename action to change the namespace for "./P2L:*", only the ExecuteResponse element is renamed to <sof:ExecutResponse xmlns:sof="http://foo.com/namespace/proxy">. Upstream in the calling application, there's an XML stream reader exception because (I assume) ExecuteResult is not found and parsed.
I also tried using a Replace action against "./P2L:ExecuteResponse/@xmlns" to replace its contents with "http://foo.com/namespace/proxy". I also tried "./P2L:ExecuteResponse/@P2L:xmlns". Neither worked.
Can anyone tell me what I'm doing wrong, or suggest a different approach? Assume that changing the calling application or business service is not an option.
Thanks!

>
If I define a prefix P2L in the expression editor to correspond to "http://foo.com/namespace/business", I'm able to reference the ExecuteResponse element as "./P2L:ExecuteResponse", but then I get stuck.
If I try use a Rename action to change the namespace for "./P2L:*", only the ExecuteResponse element is renamed to <sof:ExecutResponse xmlns:sof="http://foo.com/namespace/proxy">. Upstream in the calling application, there's an XML stream reader exception because (I assume) ExecuteResult is not found and parsed.
>
You pattern "./P2L:\*" matches just one element so it's ok that the payload's namespace wasn't touched. If you want to rename namespace for all elements try "//P2L:*". However, I'm not sure whether this is what you want. Try do describe what you do, what you want and what you get instead.
>
I also tried using a Replace action against "./P2L:ExecuteResponse/@xmlns" to replace its contents with "http://foo.com/namespace/proxy". I also tried "./P2L:ExecuteResponse/@P2L:xmlns". Neither worked.
>
I think it's not a good approach to replace content of xmlns as this attribute is not a common xml attribute.

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Can you help me in this issue?
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Yuri

ws-addressing is supported in conjunction with WS transport.You should attach a required policy
http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/security/ws_policy.html
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Hi,
I have three Asynchronous BPEL processes- BPELProcessA, BPELProcessB and BPELProcessC
I am trying to invoke BPELProcessB and BPELProcessC from BPELProcessA through an OSB Proxy service. I want to use a single proxy service to make calls to BPELProcessB and BPELProcessC from BPELProcessA . To do this I defined multiple operations in the wsdl of the proxy service. This is not working
But I am able to implement the following
1. If BPELProcessB and BPELProcessC are Synchronous, I am able to invoke BPELProcessB and BPELProcessC by defining multiple operations in the proxy service wsdl
2. I am able to invoke and receive response from 1 Asynchronous BPEL process by defining 1 operation in the proxy service wsdl. I followed the approach described at [http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/bpelpmtransport/transport.html#wp1111338]. Does this mean for each asynchronous BPEL, I need a separate pair of OSBs for each async process ( 1 for request and 1 for callback)?
Has anyone tried invoking multiple asynchronous processes by defining multiple operations in the wsdl?
Kindly request every to give inputs

Hi Eric
Below is the flow and error we are getting:
ProcessA is calling ProcessB and ProcessC through common OSB. In OSB we have created individual business services for ProcessB and ProcessC.I am using common Proxy service for calling these two Business Services using different operations.I have created one callback business service and Proxy service for ProcessA.
I am successfully able to call BPEL processes, ProcessB and ProcessC, but during callback client activity these two BPEL processes are failing with below error and ProcessA is going in waiting on receive activity state:
nested exception is:ORABPEL-00000
Exception not handled by the Collaxa Cube system.
An unhandled exception has been thrown in the Collaxa Cube system. The exception reported is: "ORABPEL-08010
Failed get operation definition.
Failed to get the WSDL operation definition of "onResult" in portType "{http://xmlns.oracle.com/AsyncBPELProcess}AsyncBPELProcessCallback".
Please verify that operation "onResult" is defined in portType "{http://xmlns.oracle.com/AsyncBPELProcess}AsyncBPELProcessCallback".
     at com.collaxa.cube.ws.wsdl.WSDLUtils.getOperation(WSDLUtils.java:216)
     at com.collaxa.cube.ws.wsdl.WSDLUtils.getOperation(WSDLUtils.java:208)
     at com.collaxa.cube.ws.wsdl.WSDLManager.isOneWayOperation(WSDLManager.java:517)
     at com.collaxa.cube.engine.core.BaseCubeProcess.getOperationType(BaseCubeProcess.java:735)
     at com.collaxa.cube.engine.delivery.DeliveryHandler.getOperationType(DeliveryHandler.java:778)
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     at com.collaxa.cube.ws.WSIFInvocationHandler.invoke(WSIFInvocationHandler.java:287)
     at com.collaxa.cube.ws.WSInvocationManager.invoke2(WSInvocationManager.java:528)
     at com.collaxa.cube.ws.WSInvocationManager.invoke(WSInvocationManager.java:248)
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     at com.collaxa.cube.engine.ext.wmp.BPELInvokeWMP.__executeStatements(BPELInvokeWMP.java:412)
     at com.collaxa.cube.engine.ext.wmp.BPELActivityWMP.perform(BPELActivityWMP.java:199)
     at com.collaxa.cube.engine.CubeEngine.performActivity(CubeEngine.java:3714)
     at com.collaxa.cube.engine.CubeEngine.handleWorkItem(CubeEngine.java:1657)
     at com.collaxa.cube.engine.dispatch.message.instance.PerformMessageHandler.handleLocal(PerformMessageHandler.java:75)
     at com.collaxa.cube.engine.dispatch.DispatchHelper.handleLocalMessage(DispatchHelper.java:220)
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     at com.collaxa.cube.engine.CubeEngine.endRequest(CubeEngine.java:5787)
     at com.collaxa.cube.engine.CubeEngine.createAndInvoke(CubeEngine.java:1089)
     at com.collaxa.cube.engine.delivery.DeliveryService.handleInvoke(DeliveryService.java:589)
     at com.collaxa.cube.engine.ejb.impl.CubeDeliveryBean.handleInvoke(CubeDeliveryBean.java:421)
     at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.evermind.server.ejb.interceptor.joinpoint.EJBJoinPointImpl.invoke(EJBJoinPointImpl.java:35)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.DMSInterceptor.invoke(DMSInterceptor.java:52)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.JAASInterceptor$1.run(JAASInterceptor.java:31)
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     at com.evermind.server.ejb.interceptor.system.DMSInterceptor.invoke(DMSInterceptor.java:52)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.InvocationContextPool.invoke(InvocationContextPool.java:55)
     at com.evermind.server.ejb.StatelessSessionEJBObject.OC4J_invokeMethod(StatelessSessionEJBObject.java:87)
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Exception: ORABPEL-08010
Failed get operation definition.
Failed to get the WSDL operation definition of "onResult" in portType "{http://xmlns.oracle.com/AsyncBPELProcess}AsyncBPELProcessCallback".
Please verify that operation "onResult" is defined in portType "{http://xmlns.oracle.com/AsyncBPELProcess}AsyncBPELProcessCallback".
Handled As: com.collaxa.cube.CubeException

Async call in OSB

Hi,
Our requirement is when the front end calls the proxy service, the proxy service should call the back end web service and give the response to front end service, This can be achieved.
But the other requirement is in case if the back end service is down .. we need to keep on retrying till the back end is UP and then send the response back to front end(Or we can send the response when the front end calls again) . But the front end will not wait for the response. Front end will fire and forget. its proxy service responsibility to keep on trying for the back end service to be up and store/send the response to front end.
Can we achieve this in OSB 11g? Or we need to go for BEPL.
Please post the steps to achive this.

As already being stated by @vladodias, OSB is better fit for stateless designs. If you need to keep the response until a later poll comes, you may be better off with BPEL.
But not necessary.
Consider this design:
1. Front end calls OSB.
2. OSB generates an unique token for the request and saves this request into an JMS queue. The token is stored into a header.
3. OSB returns the token to the caller. Caller saves it locally for future poll and closes the connection.
4. A JMS proxy transactionally reads the message from the queue (along with the token) and calls the backend service.
5. If the backend service is down, the transaction is rolled back, and the message is returned back to the queue for retry later (retry period is configured on the queue).
6. If the backend is up, the message is placed into a persistent storage using the token as a key. The storage is not JMS queue, because OSB proxies cannot programmatically read queues with filter, and also cannot read the queues on demand. So the store should be a database. (You cannot use disk as a store in a cluster unless the disk is also shared).
7. Front end calls OSB with the token.
8. OSB checks the persistent store and, if the response with the given token is found, sends it back to the the caller.
Now, you may notice that front-end always initiates the call, i.e. there is no callbacks. I do not like callbacks in OSB designs, makes a mess when you get more than one consumer. However, you may implement it, too -- i.e in step 6, instead of persisting the message, just do an outbound call to the front-end application.
Also, this design is always asynchronous. You may improve it by trying to do a synchronous call to backend first, and only if it is down, switch into asynchronous mode.
P.S. If you're not familiar with using JMS/transactions with OSB, read my post: Transactions in OSB. Reliable Messaging.
P.P.S. You can also use JMS queue as a persistent store for the responses, but then you'll have to use a Java callout that connects to the queue with a filter (by token) to extract the only message.

How can I monitor async requests in OSB

Hello everybody,
I have to set an async with response call to my legacy application. But as OSB does not support async calls with response yet, I'll use this approach described here: http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/jpdtransport/transport.html#wp1102152 that tells me to set up one proxy that will make the request to the legacy application, and another proxy to handle the callback (my application will call this one manually when it finishes the process).
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Thanks a lot guys.

I have to set an async with response call to my legacy application. But as OSB does not support async calls with response yet, I'll use this approach described here: http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/jpdtransport/transport.html#wp1102152 that tells me to set up one proxy that will make the request to the legacy application, and another proxy to handle the callback (my application will call this one manually when it finishes the process).
But, doing this, I'll have two distinct transactions, two distinct proxies, and no "natural" correlation between them. I need to set some correlation that allows me to create one SLA alert when the requisition takes more than X minutes. I already thought on sending the transaction id ($messageID) to my legacy application and have it returned to the response proxy. But doing this, I would still have no link between the information (when started, etc) of request proxy.
Well, that is what I need to get done. Some way on measuring the execution time (in SLA Alerts) of my service. How this could be done?What would be the transport of communication with legacy system (JMS)?
1) OSB is efficient in stateless point to point invocation/message enrichment but this problem appears to be use case in orchestration which is better addressed by BPEL.
2) SLA alerts in OSB are designed to work at a single proxy level. Using SLA alert framework in OSB for your use case is not possible.
3) At other level OSB also does not expose metrics (http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/jmx_monitoring/concepts.html) that will allow you to do this type of correlation using external java program.
My two cents
Manoj

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Can you briefly expand the use case for better understanding?
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How to do Async call in OSB message flow

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