Tks matthias, I did't consider about the situation you mentioned. you're
right.
one or more input topic can add to one single source node:
builder.addSource("source-1", "topic-1", "topic-2");
Or they can add to different source node:
builder.addSource("source-1", "topic-1");
builder.addSource("sou
Well. You can also ready multiple topics as a single KStream.
> builder.stream("topic-1", "topic-2")
Of course both topics must contain data with same key and value type.
For this pattern, there is only one source node.
There is no 1-to-1 relationship between input topics and source node,
and th
Kafka streams topology can define one or many SourceNode.
The picture on official document <
http://kafka.apache.org/0102/documentation/streams#streams_architecture_tasks
>
only draw one source node in some place:
1. Stream Partitions and Tasks
2. Threading Model
3. Local StateStore
And the topolo
