Github user siyuanh commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/176#discussion_r51292122
--- Diff:
kafka/src/main/java/org/apache/apex/malhar/kafka/AbstractKafkaInputOperator.java
---
@@ -366,17 +374,19 @@ public String getClusters()
return Joiner.on(';').join(clusters);
}
- public void setTopics(String... topics)
+ public void setTopics(String topics)
{
- this.topics = topics;
+ Topic.validate(topics.replace(" |,", "");
--- End diff --
valid topic + valid topic is valid invalid topic + valid topic is invalid
I know there is one exception here "a b, c" will be treated as valid but
this is just a fast fail. A topic contain space in the middle will eventually
throw exception.
To keep it simple I did this quick shortcut validation.
And there is no false negative
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