CODEWITHSUNDEEP
mule
Nathan Tregillus
Nathan Tregillus

Reputation: 6334

Is there away to pass in a flow reference to a mule flow?

I have a common set of steps that occur before and after an action. I would like to pass in a flow reference value to a common flow that takes these before and after actions.

is this possible in mule?

for clarity I want a flow that looks like this:

CommonStep1 --> CommonStep2 --> [InjectableFlowHere] --> CommonStep 3

I would then be able to pass this common flow a [InjectableFlowHere] component, whether it's a flowVariable or a property on the message, or something.

net-net I want to dependency inject a component into a flow.

update I would like InjectableFlowHere to be a flowRef where the flow name is 

<flow-ref name="#[flowVars.Prefix]GetRequestFlow" doc:name="#[flowVars.Prefix]GetRequestFlow"/>

Upvotes: 1

Views: 1708

Answers (1)

nike.laos
nike.laos

Reputation: 334

You can set flow-ref as MEL expression, like following:

<flow-ref name="#[flowVars.Prefix]-flow" doc:name="flow"/>

For instance:

<?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:spring="http://www.springframework.org/schema/beans" version="EE-3.7.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
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_Configuration" host="0.0.0.0" port="8081" doc:name="HTTP Listener Configuration"/>
    <flow name="testFlow">
        <http:listener config-ref="HTTP_Listener_Configuration" path="/" doc:name="HTTP"/>
        <flow-ref name="flow-#[message.inboundProperties['http.query.string']]" doc:name="flow-1"/>
    </flow>
    <sub-flow name="flow-1">
        <logger message="1" level="INFO" doc:name="Logger"/>
    </sub-flow>
    <sub-flow name="flow-2">
        <logger message="2" level="INFO" doc:name="Logger"/>
    </sub-flow>
</mule>

passing 1 or 2 as query string will route to respective sub-flow

Upvotes: 4

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