The document discusses how to filter messages from an ActiveMQ queue by JMS priority using Mule and Groovy. Specifically, it shows how to: 1. Send messages to an ActiveMQ queue with a specific JMS priority of 9 using Mule. 2. Configure a Mule flow to receive messages from the queue using a Groovy script to filter for messages with a JMS priority of 9. 3. Demonstrate that the Groovy script is correctly filtering to only consume the message from the queue with a JMS priority of 9.

1. By Anirban Sen Chowdhary

2. We have earlier seen how to integrate Mule and ActiveMQ .
We have also seen how to send message to ActiveMQ queue from Mule with a
specific JMS priority and to fetch messages from ActiveMQ queue filtering a
particular JMS priority.
Here we will see how to filter messages to ActiveMQ from Groovy script with a
particular JMS priority

3. Yes, we can filter payload using Groovy script for the message from ActiveMQ
queue with a particular JMS priority ….

5. Let’s consider we have a simple Mule flow as following:-
Here in we will send messages to an ActiveMQ queue with a particular JMS priority.
Let’s say our queue name be StudioOUT.
So we will be sending messages to queue StudioOUT.

6. So, our Mule config will be as following:-
You can see we are sending message to queue StudioOUT with JMS priority 9
using the following code :-
<message-properties-transformer>
<add-message-property key="Priority" value="9"/>
</message-properties-transformer>

7. Now, we will test the flow by hitting url http://localhost:8081/test the message
will be send to queue with JMS priority 9 :-

8. And, we will also check our ActiveMQ portal we will find the following :-
You can see the message priority is 9 as we have configured JMS priority in our
flow

9. Now let’s design a flow which will receive message from ActiveMQ queue and filter
it by JMS priority using Groovy script:-
You can see we have used Groovy Script to fetch the message from queue
StudioOUT

10. Now our Mule config which is using Groovy script is as follow:-

11. Now if we start our application again we will get as follow:-

12. And you can see it has consumed the message from queue which has the JMS
priority 9 :-
Thus, you can see that we can also set the filter to consume message from
ActiveMQ using Groovy

13. In my next slide I will bring some other techniques in Mule implementation .
Hope you have enjoyed this simpler version.
Keep sharing your knowledge and let our Mule community grow 