Flow reference in Mule 4 Example

  Flow reference in Mule 4 Example

 

Flow Reference routes the Mule event to another flow or subflow, executes all processors in the referenced flow, and then routes the event back within the same Mule application.

Flow Reference breaks the Mule application into discrete and reusable units. For example, a flow that lists files on a regular basis might reference another flow that processes the output of the List operation. Instead of appending all the processing steps to the flow that lists the files, you can append a Flow Reference that points to the processing flow.

Example:

URL: http://localhost:8085/ref

Method: GET

Output:

XML project code:

<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core"
       xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd">
       <http:listener-config name="HTTP_Listener_config" doc:name="HTTP Listener config" doc:id="a4e501b9-6daa-4b7e-b0d5-af8f71e4538d" >
              <http:listener-connection host="0.0.0.0" port="8085" />
       </http:listener-config>
       <flow name="test_subflowFlow" doc:id="1a446e09-90cc-49a2-9ce7-b90bddedb3db" >
              <http:listener doc:name="Listener" doc:id="3d4b5b66-8d9b-4742-b6aa-998272ea1905" config-ref="HTTP_Listener_config" path="/ref"/>
              <set-variable value="1" doc:name="Set Variable" doc:id="33ba4c59-98fd-44bb-a2ad-1847506b4ab0" variableName="var1"/>
              <flow-ref doc:name="Flow Reference" doc:id="f12a2f26-411d-4819-ae5d-7748d744a562" name="test_subflowSub_Flow"/>
       </flow>
       <sub-flow name="test_subflowSub_Flow" doc:id="3cdc536a-c92b-4217-88be-b58e224c6824" >
              <logger level="INFO" doc:name="Logger" doc:id="a6287bb5-0ee2-42cd-9107-e2593e2f4503" message="#[vars.var1]"/>
       </sub-flow>
</mule>