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/*
* 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.common.utils.Bytes;
import org.apache.kafka.streams.kstream.Aggregator;
import org.apache.kafka.streams.kstream.CogroupedKStream;
import org.apache.kafka.streams.kstream.Initializer;
import org.apache.kafka.streams.kstream.KGroupedStream;
import org.apache.kafka.streams.kstream.KTable;
import org.apache.kafka.streams.kstream.Materialized;
import org.apache.kafka.streams.kstream.Named;
import org.apache.kafka.streams.kstream.SessionWindowedCogroupedKStream;
import org.apache.kafka.streams.kstream.SessionWindows;
import org.apache.kafka.streams.kstream.SlidingWindows;
import org.apache.kafka.streams.kstream.TimeWindowedCogroupedKStream;
import org.apache.kafka.streams.kstream.Window;
import org.apache.kafka.streams.kstream.Windows;
import org.apache.kafka.streams.kstream.internals.graph.StreamsGraphNode;
import org.apache.kafka.streams.state.KeyValueStore;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
public class CogroupedKStreamImpl extends AbstractStream implements CogroupedKStream {
static final String AGGREGATE_NAME = "COGROUPKSTREAM-AGGREGATE-";
static final String MERGE_NAME = "COGROUPKSTREAM-MERGE-";
final private Map, Aggregator> groupPatterns;
final private CogroupedStreamAggregateBuilder aggregateBuilder;
CogroupedKStreamImpl(final String name,
final Set subTopologySourceNodes,
final StreamsGraphNode streamsGraphNode,
final InternalStreamsBuilder builder) {
super(name, null, null, subTopologySourceNodes, streamsGraphNode, builder);
groupPatterns = new LinkedHashMap<>();
aggregateBuilder = new CogroupedStreamAggregateBuilder<>(builder);
}
@SuppressWarnings("unchecked")
@Override
public CogroupedKStream cogroup(final KGroupedStream groupedStream,
final Aggregator aggregator) {
Objects.requireNonNull(groupedStream, "groupedStream can't be null");
Objects.requireNonNull(aggregator, "aggregator can't be null");
groupPatterns.put((KGroupedStreamImpl) groupedStream,
(Aggregator) aggregator);
return this;
}
@Override
public KTable aggregate(final Initializer initializer,
final Materialized> materialized) {
return aggregate(initializer, NamedInternal.empty(), materialized);
}
@Override
public KTable aggregate(final Initializer initializer, final Named named) {
return aggregate(initializer, named, Materialized.with(keySerde, null));
}
@Override
public KTable aggregate(final Initializer initializer,
final Named named,
final Materialized> materialized) {
Objects.requireNonNull(initializer, "initializer can't be null");
Objects.requireNonNull(named, "named can't be null");
Objects.requireNonNull(materialized, "materialized can't be null");
return doAggregate(
initializer,
new NamedInternal(named),
new MaterializedInternal<>(materialized, builder, AGGREGATE_NAME));
}
@Override
public KTable aggregate(final Initializer initializer) {
return aggregate(initializer, Materialized.with(keySerde, null));
}
@Override
public TimeWindowedCogroupedKStream windowedBy(final Windows windows) {
Objects.requireNonNull(windows, "windows can't be null");
return new TimeWindowedCogroupedKStreamImpl<>(
windows,
builder,
subTopologySourceNodes,
name,
aggregateBuilder,
streamsGraphNode,
groupPatterns);
}
@Override
public TimeWindowedCogroupedKStream windowedBy(final SlidingWindows slidingWindows) {
Objects.requireNonNull(slidingWindows, "slidingWindows can't be null");
return new SlidingWindowedCogroupedKStreamImpl<>(
slidingWindows,
builder,
subTopologySourceNodes,
name,
aggregateBuilder,
streamsGraphNode,
groupPatterns);
}
@Override
public SessionWindowedCogroupedKStream windowedBy(final SessionWindows sessionWindows) {
Objects.requireNonNull(sessionWindows, "sessionWindows can't be null");
return new SessionWindowedCogroupedKStreamImpl<>(sessionWindows,
builder,
subTopologySourceNodes,
name,
aggregateBuilder,
streamsGraphNode,
groupPatterns);
}
private KTable doAggregate(final Initializer initializer,
final NamedInternal named,
final MaterializedInternal> materializedInternal) {
return aggregateBuilder.build(
groupPatterns,
initializer,
named,
new TimestampedKeyValueStoreMaterializer<>(materializedInternal).materialize(),
materializedInternal.keySerde(),
materializedInternal.valueSerde(),
materializedInternal.queryableStoreName());
}
}
