cadonna commented on code in PR #15601:
URL: https://github.com/apache/kafka/pull/15601#discussion_r1604937635
##########
streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamKStreamJoin.java:
##########
@@ -187,17 +157,25 @@ public void process(final Record<K, V1> record) {
context().forward(record.withValue(joiner.apply(record.key(), record.value(),
null)));
} else {
sharedTimeTracker.updatedMinTime(inputRecordTimestamp);
- outerJoinStore.ifPresent(store -> store.put(
- TimestampedKeyAndJoinSide.make(isLeftSide,
record.key(), inputRecordTimestamp),
- LeftOrRightValue.make(isLeftSide,
record.value())));
+ putInOuterJoinStore(record);
}
}
}
}
+ protected abstract TimestampedKeyAndJoinSide<K> makeThisKey(final K
key, final long inputRecordTimestamp);
+
+ protected abstract LeftOrRightValue<VLeft, VRight> makeThisValue(final
VThis thisValue);
+
+ protected abstract TimestampedKeyAndJoinSide<K> makeOtherKey(final K
key, final long timestamp);
+
+ protected abstract VThis getThisValue(final LeftOrRightValue<? extends
VLeft, ? extends VRight> leftOrRightValue);
+
+ protected abstract VOther getOtherValue(final LeftOrRightValue<?
extends VLeft, ? extends VRight> leftOrRightValue);
+
private void emitNonJoinedOuterRecords(
- final KeyValueStore<TimestampedKeyAndJoinSide<K>,
LeftOrRightValue<V1, V2>> store,
- final Record<K, V1> record) {
+ final KeyValueStore<TimestampedKeyAndJoinSide<K>,
LeftOrRightValue<VLeft, VRight>> store,
+ final Record<K, ?> record) {
Review Comment:
nit:
```java
private void emitNonJoinedOuterRecords(final
KeyValueStore<TimestampedKeyAndJoinSide<K>, LeftOrRightValue<VLeft, VRight>>
store,
final Record<K, ?> record) {
```
##########
streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamKStreamJoin.java:
##########
@@ -275,20 +246,22 @@ private void emitNonJoinedOuterRecords(
}
}
- @SuppressWarnings("unchecked")
- private VOut getNullJoinedValue(
- final K key,
- final LeftOrRightValue<V1, V2> leftOrRightValue) {
- // depending on the JoinSide fill in the joiner key and joiner
values
- if (isLeftSide) {
- return joiner.apply(key,
- leftOrRightValue.getLeftValue(),
- leftOrRightValue.getRightValue());
- } else {
- return joiner.apply(key,
- (V1) leftOrRightValue.getRightValue(),
- (V2) leftOrRightValue.getLeftValue());
- }
+ private void forwardNonJoinedOuterRecords(final Record<K, ?> record,
final KeyValue<? extends TimestampedKeyAndJoinSide<K>, ? extends
LeftOrRightValue<VLeft, VRight>> nextKeyValue) {
Review Comment:
I think it would be simpler to define this method as:
```java
private void forwardNonJoinedOuterRecords(final Record<K, VThis> record,
final TimestampedKeyAndJoinSide<K>
timestampedKeyAndJoinSide,
final LeftOrRightValue<VLeft,
VRight> leftOrRightValue) {
```
It makes the code a bit simpler and shorter.
Also here, why not `Record<K, VThis> record`. That is exactly the type used
at the call site.
##########
streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamKStreamJoin.java:
##########
@@ -187,17 +157,25 @@ public void process(final Record<K, V1> record) {
context().forward(record.withValue(joiner.apply(record.key(), record.value(),
null)));
} else {
sharedTimeTracker.updatedMinTime(inputRecordTimestamp);
- outerJoinStore.ifPresent(store -> store.put(
- TimestampedKeyAndJoinSide.make(isLeftSide,
record.key(), inputRecordTimestamp),
- LeftOrRightValue.make(isLeftSide,
record.value())));
+ putInOuterJoinStore(record);
}
}
}
}
+ protected abstract TimestampedKeyAndJoinSide<K> makeThisKey(final K
key, final long inputRecordTimestamp);
+
+ protected abstract LeftOrRightValue<VLeft, VRight> makeThisValue(final
VThis thisValue);
+
+ protected abstract TimestampedKeyAndJoinSide<K> makeOtherKey(final K
key, final long timestamp);
+
+ protected abstract VThis getThisValue(final LeftOrRightValue<? extends
VLeft, ? extends VRight> leftOrRightValue);
+
+ protected abstract VOther getOtherValue(final LeftOrRightValue<?
extends VLeft, ? extends VRight> leftOrRightValue);
+
private void emitNonJoinedOuterRecords(
- final KeyValueStore<TimestampedKeyAndJoinSide<K>,
LeftOrRightValue<V1, V2>> store,
- final Record<K, V1> record) {
+ final KeyValueStore<TimestampedKeyAndJoinSide<K>,
LeftOrRightValue<VLeft, VRight>> store,
+ final Record<K, ?> record) {
Review Comment:
Shouldn't that be
```java
final Record<K, VThis> record
```
?
##########
streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamKStreamLeftJoinSide.java:
##########
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.kafka.streams.kstream.internals;
+
+import org.apache.kafka.streams.kstream.ValueJoinerWithKey;
+import
org.apache.kafka.streams.kstream.internals.KStreamImplJoin.TimeTrackerSupplier;
+import org.apache.kafka.streams.processor.api.Processor;
+import org.apache.kafka.streams.state.internals.LeftOrRightValue;
+import org.apache.kafka.streams.state.internals.TimestampedKeyAndJoinSide;
+
+import java.util.Optional;
+
+class KStreamKStreamLeftJoinSide<K, VLeft, VRight, VOut> extends
KStreamKStreamJoin<K, VLeft, VRight, VOut, VLeft, VRight> {
+
+ KStreamKStreamLeftJoinSide(final String otherWindowName,
+ final JoinWindowsInternal windows,
+ final ValueJoinerWithKey<? super K, ? super
VLeft, ? super VRight, ? extends VOut> joiner,
+ final boolean outer,
+ final Optional<String> outerJoinWindowName,
+ final TimeTrackerSupplier
sharedTimeTrackerSupplier) {
+ super(otherWindowName, windows, joiner, outer, outerJoinWindowName,
windows.beforeMs, windows.afterMs,
+ sharedTimeTrackerSupplier);
+ }
+
+ @Override
+ public Processor<K, VLeft, K, VOut> get() {
+ return new KStreamKStreamJoinLeftProcessor();
+ }
+
+ private class KStreamKStreamJoinLeftProcessor extends
KStreamKStreamJoinProcessor {
+
+
Review Comment:
```suggestion
```
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