Using Mule Requester for JMS

1. By Anirban Sen Chowdhary

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4. Let me introduce you a component in Mule called Mule
Requester
Mule Requester
This component we can place in between our Mule
flow and can be used for any Inbound component
like Http, JMS or File

5. It can :-
• Load a file in a middle of a flow and start processing it.
• call a JMS queue and fetch the data from it in middle of
a queue
• Pull messages from a mail server on demand

6. Let us consider we need to fetch a JMS message from a JMS
queue
So you can see we have put a Mule requester in the middle
of the flow which will act as an JMS inbound endpoint here

7. The Mule config will be :-
<mulerequester:config name="Mule_Requester" doc:name="Mule
Requester"/>
<jms:activemq-connector name="Active_MQ"
brokerURL="tcp://localhost:61616" specification="1.1"
doc:name="Active MQ"/>
<flow name="QueueRequester" doc:name="QueueRequester">
<http:inbound-endpoint exchange-pattern="request-response"
host="localhost" port="8081" path="fetch" doc:name="HTTP"/>
<mulerequester:request config-ref="Mule_Requester"
resource="jms://input" doc:name="Request a message from a queue"
/>
<logger message="Payload from JMS message: #[payload]"
level="WARN" doc:name="Logger"/>
</flow>

8. Now suppose there is a JMS queue named input from
where we need to fetch data in our flow on we hit the url
: http://localhost:8081/fetch like the following :-
As you can see above I am able to fetch the data “My
Payload” from the JMS queue in the middle of the flow

9. Thus, with the help of Mule Requester we can call any inbound
endpoint in Mule in between the Mule flow starting from JMS, to
http inbound and even File inbound. And the example has shown
you that we can use this Mule Requester as a file inbound
endpoint and can be used in the middle of a Mule flow