how to send partial source data attributes to different targets - spring

Question

I am building an integration between a source and two targets, here source data object has 10 attributes , of which one target needs around 6 attributes and another target needs 4 attributes only, appreciate any help here on how i can achieve with spring

Answer 1

You can configure the source to send the Message to a PublishSubscribeChannel .
Then configure two Transformers to subscribe to this pub-sub channel. One of the transformer will transform the message the 6 attributes version while other to the 4 attributes version. Both transformers will then send the transformed messages to a separate channel .The two target system will look for the messages sent to these separated channels and process them.
In term of annotation configuration , it looks like the following: (Assuming the message the source sent out is Foo)
#Bean
public MessageChannel pubSubChannel() {
return new PublishSubscribeChannel();
}
#Bean
public MessageChannel outputChannelWith4Attributes() {
return new DirectChannel();
}
#Bean
public MessageChannel outputChannelWith6Attributes() {
return new DirectChannel();
}
#Component
public class MyTransformer {
#Transformer(inputChannel = "pubSubChannel", outputChannel = "outputChannelWith4Attributes")
public Foo transformTo4Attribute(Foo foo) {
//do the transformation logic here
return result;
}
#Transformer(inputChannel = "pubSubChannel", outputChannel = "outputChannelWith6Attributes")
public Foo transformTo6Attribute(Foo foo) {
//do the transformation logic here
return result;
}
}
And configure the source to send the message with payload Foo to pubSubChannel .Also configure the targets to process message from outputChannelWith4Attributes and outputChannelWith6Attributes.