Scatter-gather in Mule sends a request message concurrently to multiple targets. It then collects the responses from all routes and aggregates them into a single message. To implement scatter-gather, the flow references two sub-flows that run concurrently. At the end, the payloads from both sub-flows are merged by the scatter-gather processor. Testing the flow via a URL will output logs showing that the sub-flows completed concurrently and the payloads were merged.

1. Khan

2. Scatter-Gather is an important component in Mule that sends a request message to
multiple targets concurrently. At the end it collects the responses from all routes, and
aggregates them into a single message.

3. Message
Processor
Message
Processor
Combined Payload
Processing concurrently

5. To implement scatter-gather in Mule lets consider the following flow:-
You can see that there is two flow reference after scatter-gather which means it will
process 2 flows concurrently .

6. The other 2 sub flows are here:-
Now, You will see that these two flows will run concurrently and at the end the
payloads from both the flow will be merged .

7. Our Mule config will be as follow:-

8. Now, our flow is ready .. If we can test our flow using the url :-
http://localhost:8090/scattergather and we will get in logs as follows :-
You can see both the flow ended up concurrently and scatter-gather has
merged the payload fro both the flows at the end

9. 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 