java,spring,spring-integration , spring : adding params for router
spring : adding params for router
Question:
Tag: java,spring,spring-integration
I'm using spring router to decide which of 2 channels to go through. I wan't to pass to the service that gives back an answer one of the values in the payload and not the payload itself. How can I do that? I didn't really find a use case like this, I thought maybe it could be done by using enricher. Any suggestions?
My code :
<int:router id="aggregationRouter"
input-channel="aggregationPathRouterInputChannel"
ref="decideAggregationByName"
>
<int:mapping value="true" channel="SumAggregatorChannel" />
<int:mapping value="false" channel="AvgAggregatorChannel"/>
</int:router>
the decideAggregationByName gets an input which is a string (name) and returns a boolean. I don't know how to pass the string argument that is a member inside the payload I get in this step
Answer:
Most Spring Integration components provide an expression option in contradiction to the ref and method. So, if your payload is a Map (for example), but your decideAggregationByName requires String as an argument and you know which key represents a value for that arg you can do that like this:
<int:router id="aggregationRouter"
input-channel="aggregationPathRouterInputChannel"
expression="@decideAggregationByName.doDecision(payload['key'])"
>
From other side you can rework that target method to accept whole payload object and extract desired String from the code manually.
Otherwise I'm not sure what is the issue is in front of you.
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