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Posted to dev@kafka.apache.org by "Laurent T (JIRA)" <ji...@apache.org> on 2017/09/18 14:34:09 UTC
[jira] [Created] (KAFKA-5924) Add the compose method to the Kafka
Stream API
Laurent T created KAFKA-5924:
--------------------------------
Summary: Add the compose method to the Kafka Stream API
Key: KAFKA-5924
URL: https://issues.apache.org/jira/browse/KAFKA-5924
Project: Kafka
Issue Type: Wish
Components: streams
Reporter: Laurent T
Priority: Minor
Hi,
I'm referencing RxJava for it's [compose method|https://github.com/ReactiveX/RxJava/wiki/Implementing-Your-Own-Operators#transformational-operators] which is very handy. It would be great if the Streams API would give us something similar. It's pretty easy to implement and allows to have much more clarity to the code (it avoids breaking the linearity of the code when you want to reuse parts of the stream topology). e.g.
Without compose:
{code:java}
TopologyUtils
.myUtil(topology
.map(...)
.flatMap(...)
.through(...))
.map(...)
.to(...);
{code}
With compose:
{code:java}
topology
.map(...)
.flatMap(...)
.through(...)
.compose(TopologyUtils::myUtil)
.map(...)
.to(...);
{code}
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