florin-akermann commented on code in PR #14107:
URL: https://github.com/apache/kafka/pull/14107#discussion_r1589921037
##########
streams/src/main/java/org/apache/kafka/streams/kstream/internals/foreignkeyjoin/SubscriptionSendProcessorSupplier.java:
##########
@@ -109,108 +111,102 @@ public void init(final ProcessorContext<KO,
SubscriptionWrapper<K>> context) {
@Override
public void process(final Record<K, Change<V>> record) {
+ // clear cashed hash from previous record
+ recordHash = null;
// drop out-of-order records from versioned tables (cf. KIP-914)
if (useVersionedSemantics && !record.value().isLatest) {
LOG.info("Skipping out-of-order record from versioned table
while performing table-table join.");
droppedRecordsSensor.record();
return;
}
+ if (leftJoin) {
+ leftJoinInstructions(record);
+ } else {
+ defaultJoinInstructions(record);
+ }
+ }
- final long[] currentHash = record.value().newValue == null ?
- null :
- Murmur3.hash128(valueSerializer.serialize(valueSerdeTopic,
record.value().newValue));
-
- final int partition = context().recordMetadata().get().partition();
+ private void leftJoinInstructions(final Record<K, Change<V>> record) {
if (record.value().oldValue != null) {
final KO oldForeignKey =
foreignKeyExtractor.apply(record.value().oldValue);
+ final KO newForeignKey = record.value().newValue == null ?
null : foreignKeyExtractor.apply(record.value().newValue);
+ if (oldForeignKey != null &&
!Arrays.equals(serialize(newForeignKey), serialize(oldForeignKey))) {
+ forward(record, oldForeignKey, DELETE_KEY_AND_PROPAGATE);
+ }
+ forward(record, newForeignKey,
PROPAGATE_NULL_IF_NO_FK_VAL_AVAILABLE);
Review Comment:
@mjsax omg, thanks for the flag! Looks like @AyoubOm is addressing it in
https://issues.apache.org/jira/browse/KAFKA-16394 already?
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