Question

I am working in a Spring integration project and the flow is simple. I get a message from a messagechannel and forward it to my own custom written router. The router based on the message type and some external hashmap value, forwards the message to a transformer though a channel. Everything, the router and transformers are in Java. Now I have to extend my project to be able to call transformers written by non-Java languages like ruby, python, groovy etc. I have seen how non-java code in these languages can be modelled as beans within the Spring context. However, I am not sure how to call non-java transformers in Spring Integration. Any pointers or sample example/code would be very helpful.

Answer 1

Take a look at the spring-integration-scripting module; for example…

<service-activator input-channel="referencedScriptInput">
    <script:script 
            lang="python"
            location="org/springframework/integration/scripting/config/jsr223/Jsr223ServiceActivatorTests.py">
        <script:variable name="foo" value="foo"/>
        <script:variable name="bar" value="bar"/>
        <script:variable name="date" ref="date"/>
    </script:script>
</service-activator>

and

<transformer input-channel="referencedScriptInput">
    <script:script
    lang="ruby" 
    location="org/springframework/integration/scripting/config/jsr223/Jsr223TransformerTests.rb"/>
</transformer>

Documentation is here… http://static.springsource.org/spring-integration/reference/html/messaging-endpoints-chapter.html#scripting