org.springframework.cloud.stream.binder.kafka.streams.annotations

Interface KafkaStreamsProcessor

public interface KafkaStreamsProcessor

Bindable interface for KStream input and output. This interface can be used as a bindable interface with EnableBinding when both input and output types are single KStream. In other scenarios where multiple types are required, other similar bindable interfaces can be created and used. For example, there are cases in which multiple KStreams are required on the outbound in the case of KStream branching or multiple input types are required either in the form of multiple KStreams and a combination of KStreams and KTables. In those cases, new bindable interfaces compatible with the requirements must be created. Here are some examples.

     interface KStreamBranchProcessor {
         @Input("input")
         KStream<?, ?> input();

         @Output("output-1")
         KStream<?, ?> output1();

         @Output("output-2")
         KStream<?, ?> output2();

         @Output("output-3")
         KStream<?, ?> output3();

         ......

     }

     interface KStreamKtableProcessor {
         @Input("input-1")
         KStream<?, ?> input1();

         @Input("input-2")
         KTable<?, ?> input2();

         @Output("output")
         KStream<?, ?> output();

         ......

     }

Author:

Marius Bogoevici, Soby Chacko

Method Summary

Modifier and Type	Method and Description
org.apache.kafka.streams.kstream.KStream<?,?>	input() Input binding.
org.apache.kafka.streams.kstream.KStream<?,?>	output() Output binding.

Method Detail

input

@Input(value="input")
org.apache.kafka.streams.kstream.KStream<?,?> input()

Input binding.

Returns:

Input binding for KStream type.

output

@Output(value="output")
org.apache.kafka.streams.kstream.KStream<?,?> output()

Output binding.

Returns:

Output binding for KStream type.