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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.Initializer;
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.SlidingWindows;
import org.apache.kafka.streams.kstream.TimeWindowedCogroupedKStream;
import org.apache.kafka.streams.kstream.Windowed;
import org.apache.kafka.streams.kstream.internals.graph.GraphNode;
import org.apache.kafka.streams.state.StoreBuilder;
import org.apache.kafka.streams.state.Stores;
import org.apache.kafka.streams.state.TimestampedWindowStore;
import org.apache.kafka.streams.state.WindowBytesStoreSupplier;
import org.apache.kafka.streams.state.WindowStore;
import java.time.Duration;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
public class SlidingWindowedCogroupedKStreamImpl extends AbstractStream implements TimeWindowedCogroupedKStream {
private final SlidingWindows windows;
private final CogroupedStreamAggregateBuilder aggregateBuilder;
private final Map, Aggregator> groupPatterns;
SlidingWindowedCogroupedKStreamImpl(final SlidingWindows windows,
final InternalStreamsBuilder builder,
final Set subTopologySourceNodes,
final String name,
final CogroupedStreamAggregateBuilder aggregateBuilder,
final GraphNode graphNode,
final Map, Aggregator> groupPatterns) {
super(name, null, null, subTopologySourceNodes, graphNode, builder);
//keySerde and valueSerde are null because there are many different groupStreams that they could be from
this.windows = windows;
this.aggregateBuilder = aggregateBuilder;
this.groupPatterns = groupPatterns;
}
@Override
public KTable, V> aggregate(final Initializer initializer) {
return aggregate(initializer, Materialized.with(null, null));
}
@Override
public KTable, V> aggregate(final Initializer initializer,
final Materialized> materialized) {
return aggregate(initializer, NamedInternal.empty(), materialized);
}
@Override
public KTable, V> aggregate(final Initializer initializer,
final Named named) {
return aggregate(initializer, named, Materialized.with(null, null));
}
@Override
public KTable, V> 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");
final MaterializedInternal> materializedInternal = new MaterializedInternal<>(
materialized,
builder,
CogroupedKStreamImpl.AGGREGATE_NAME);
return aggregateBuilder.build(
groupPatterns,
initializer,
new NamedInternal(named),
materialize(materializedInternal),
materializedInternal.keySerde() != null ?
new FullTimeWindowedSerde<>(materializedInternal.keySerde(), windows.timeDifferenceMs())
: null,
materializedInternal.valueSerde(),
materializedInternal.queryableStoreName(),
windows);
}
private StoreBuilder> materialize(final MaterializedInternal> materialized) {
WindowBytesStoreSupplier supplier = (WindowBytesStoreSupplier) materialized.storeSupplier();
if (supplier == null) {
final long retentionPeriod = materialized.retention() != null ? materialized.retention().toMillis() : windows.gracePeriodMs() + 2 * windows.timeDifferenceMs();
if ((windows.timeDifferenceMs() * 2 + windows.gracePeriodMs()) > retentionPeriod) {
throw new IllegalArgumentException("The retention period of the window store "
+ name
+ " must be no smaller than 2 * time difference plus the grace period."
+ " Got time difference=[" + windows.timeDifferenceMs() + "],"
+ " grace=[" + windows.gracePeriodMs()
+ "],"
+ " retention=[" + retentionPeriod
+ "]");
}
switch (materialized.storeType()) {
case IN_MEMORY:
supplier = Stores.inMemoryWindowStore(
materialized.storeName(),
Duration.ofMillis(retentionPeriod),
Duration.ofMillis(windows.timeDifferenceMs()),
false
);
break;
case ROCKS_DB:
supplier = Stores.persistentTimestampedWindowStore(
materialized.storeName(),
Duration.ofMillis(retentionPeriod),
Duration.ofMillis(windows.timeDifferenceMs()),
false
);
break;
default:
throw new IllegalStateException("Unknown store type: " + materialized.storeType());
}
}
final StoreBuilder> builder = Stores
.timestampedWindowStoreBuilder(
supplier,
materialized.keySerde(),
materialized.valueSerde()
);
if (materialized.loggingEnabled()) {
builder.withLoggingEnabled(materialized.logConfig());
} else {
builder.withLoggingDisabled();
}
if (materialized.cachingEnabled()) {
builder.withCachingEnabled();
} else {
builder.withCachingDisabled();
}
return builder;
}
}
