Mule: how to assign a Java/Spring bean's method call result to a flow variable

Question

I am new to Mule. I understand I can have"Java" or "Invoke" component in the Mule flow configuration. My question is: how can I assign the value returned by a Java method call to a Mule flow variable? ex. something like

<spring-bean name="myBean" .... />

<invoke object-ref="myBean" method="addTwoNumbers" methodArguments="#[var1], #[var2]" methodArgumentTypes="java.lang.Float, java.lang.Float" name="someName" doc:name="Invoke"/>

<set-variable variableName="addResult" value="???????" />

I need the "addResult" var to have the value of the previous invocation result, but how?

Thanks!

Answer 1

The result of the spring bean will be the payload, so you can set it like so:

<set-variable variableName="addResult" value="#[payload]" />

However if you don't want to overwrite the existing payload you can use an enricher :

<enricher target="#[flowVars.addResult]">
   <invoke object-ref="myBean" method="addTwoNumbers" methodArguments="#[var1], #[var2]" methodArgumentTypes="java.lang.Float, java.lang.Float" name="someName" doc:name="Invoke"/>
</enricher>