dengpanyin commented on a change in pull request #1135: SAMZA-2299:
StreamTableJoin operator should invoke user join function only once
URL: https://github.com/apache/samza/pull/1135#discussion_r312682808
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File path:
samza-core/src/main/java/org/apache/samza/operators/impl/StreamTableJoinOperatorImpl.java
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@@ -74,10 +74,11 @@ protected void handleInit(Context context) {
}
private Collection<JM> getJoinOutput(K key, Object value, M message) {
- JM output = Optional.ofNullable(value)
+ R record = Optional.ofNullable(value)
Review comment:
I didn't see how user join function could be invoked more than once before
this change.
Can be simpler:
R record = value == null ? null : (R) KV.of(key, value);
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