Add support for non-annotation based binding of an EL expression to Message payload and headers [INT-809]

[spring-operator]

Mark Fisher opened INT-809 and commented

The MethodNameMappingExpressionSource code is currently available in the sandbox (under org.springframework.integration.expression).

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This issue is a sub-task of #4046

[spring-operator]

Mark Fisher commented

Moving the non-annotation based configuration option to M2.

[spring-operator]

Oleg Zhurakousky commented

Publisher configuration is now supported via XML namespace. Below is the example

<aop:config>
   <aop:advisor advice-ref="interceptor" pointcut="bean(testBean)" /> 
</aop:config>
<publisher id="interceptor" default-channel="defaultChannel"> 
    <method pattern="echo" payload="'Echoing: ' + #return" headers="foo='bar'" channel="echoChannel"/> 
    <method pattern="echoDef*" payload="#return"/> 
    <method pattern="foo*"/>
</publisher>

More details provided in the reference documentation