mynameborat commented on a change in pull request #984: Samza 2116: Making
sink, sendTo(table), sendTo(stream) non-terminal
URL: https://github.com/apache/samza/pull/984#discussion_r272007095
##########
File path:
samza-api/src/main/java/org/apache/samza/operators/functions/SinkFunction.java
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@@ -42,6 +42,6 @@
* @param messageCollector the {@link MessageCollector} to send the message
* @param taskCoordinator the {@link TaskCoordinator} to request commits or
shutdown
*/
- void apply(M message, MessageCollector messageCollector, TaskCoordinator
taskCoordinator);
+ M apply(M message, MessageCollector messageCollector, TaskCoordinator
taskCoordinator);
Review comment:
+1
It introduces confusion from the perspective of how is this even different
from MapFunction?
Further, it opens up possibility for applications to return a different
message than the input which makes it harder to reason about the semantics of
SinkFunction.
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