Will the aggregator mediator work in insequence ?
I have a splitter which will split the messages to JMS queue. I have another proxy service which should collect the messages and aggregate it.
I have kept the aggregator in insequence. Am I logically correct ?
Regards
Guru
#gnanagurus
Message aggregation cannot be done in the inSequence without having a iterate mediator placed in inSequence.
There is a correlation between the splitting and the aggregation.
You can only aggregate messages which are split using the iterate mediator or cloned using clone mediator within the same Proxy service.
If you can provide me more information on your scenario, I can help you further.
Related
I have a class mediator in sequence which will have list of requests.
Now I need to iterate the list of request and send it to a defined end point.
Please advise.
You can use Call Mediator to call multiple web services in a single sequence.
See Call Mediator for details.
You can do iterate your messages using Iterate mediator.
See Iterate Mediator for details.
Thanks
As per the documentation ESB as a JMS Producer setting OUT_ONLY should make the send mediator async. But instead I get timeout error as its waiting on response. What I found from various blogs is adding FORCE_SC_ACCEPTED would make it async. But in this case the proxy will respond at the send mediator. I do not want that, I want it to go to out sequence where I can generate a proper response message. Any help appreciated.
Use clone mediator :
in the 1st target, define OUT_ONLY property and use send mediator to send your message to a JMS queue
in the 2nd target, create a response message and use respond mediator
Anybody would please through some light on difference between call and send mediator and what use cases these two mediators are used.
Send mediator - used to send messages out of Synapse to some endpoint. Then the response is returned to the OutSequence where you can send it back to the client
Use cases - When you only need to send a message to one back end and return the response back to the client.
Call mediator - Also used to send messages out of the Synapse to some endpoint, but the response does not come to the OutSequence. When we send a request using the call mediator, the response will arrive to the mediator that is placed right after the call mediator.So this will allow us to specify all the service invocations one after the other in a chain within a single sequence
Use cases - Service chaining. i.e.- Vehicle license renewal service
Another characteristic is that the callout mediator is blocking, send mediator and call mediator are not blocking. This answer is in regards to WSO2 versions until 4.8.0
Hi i am receiving the file from remote server which in .csv format into wso2 ESB proxy service and i am getting the response as
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Body><text xmlns="http://ws.apache.org/commons/ns/payload">firstname,lastname
a,John
b,Scott
c,Tiger
d,Manager
</text></soapenv:Body></soapenv:Envelope>
but how can i split this message element by element and receive each element into ESB Proxy service.
Guide me how can i receive the split message into ESB and store into database.
I guess, you can use smooks mediator and convert CSV data to XML. Then data can be retrieved using XPath. There is a Stackoverflow question on this, Please go through it. Also you can use db report mediator to persist data in to preferred database. You find doc from here. One you convert data to XML, then you can use XPath to define the data that must be persisted in to database. However, you can even write a custom medaitor for ESB, if you want to do some more things than that. Here it explains how to write a custom mediator
I am confused with the above two mediators. What is the difference between Call out mediator and send mediator in wso2ESB mediators?
Actually callout mediator makes a blocking call, it cannot use the default non-blocking http/s transports based on Java NIO. But the send mediator makes aynchronous call for services. This is the basic difference between them. For more about those you can refer the documentation;
http://docs.wso2.org/display/ESB470/Mediators
Additionally to callout mediator WSO2 ESB team has introduced another brand new mediator to serve blocking call to Backend. "Call Mediator" is very similar to the Callout Mediator, which performs a blocking external service invocation during mediation. Unlike the Callout mediator, the Call mediator leverages the non-blocking transports for much greater performance.