KAFKA-14491: [13/N] Add versioned store builder and materializer #13274
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| * 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.state.internals; | ||
|
|
||
| import org.apache.kafka.common.serialization.Serde; | ||
| import org.apache.kafka.common.utils.Bytes; | ||
| import org.apache.kafka.common.utils.Time; | ||
| import org.apache.kafka.streams.state.KeyValueStore; | ||
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|
||
| import java.util.Objects; | ||
| import org.apache.kafka.streams.state.StoreBuilder; | ||
| import org.apache.kafka.streams.state.ValueAndTimestamp; | ||
| import org.apache.kafka.streams.state.VersionedBytesStore; | ||
| import org.apache.kafka.streams.state.VersionedBytesStoreSupplier; | ||
| import org.apache.kafka.streams.state.VersionedKeyValueStore; | ||
|
|
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| public class VersionedKeyValueStoreBuilder<K, V> | ||
| extends AbstractStoreBuilder<K, V, VersionedKeyValueStore<K, V>> { | ||
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|
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| private final VersionedBytesStoreSupplier storeSupplier; | ||
|
|
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| public VersionedKeyValueStoreBuilder(final VersionedBytesStoreSupplier storeSupplier, | ||
| final Serde<K> keySerde, | ||
| final Serde<V> valueSerde, | ||
| final Time time) { | ||
| super( | ||
| storeSupplier.name(), | ||
| keySerde, | ||
| valueSerde, | ||
| time); | ||
| Objects.requireNonNull(storeSupplier, "storeSupplier can't be null"); | ||
| Objects.requireNonNull(storeSupplier.metricsScope(), "storeSupplier's metricsScope can't be null"); | ||
| this.storeSupplier = storeSupplier; | ||
| } | ||
|
|
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| @Override | ||
| public VersionedKeyValueStore<K, V> build() { | ||
| final KeyValueStore<Bytes, byte[]> store = storeSupplier.get(); | ||
| if (!(store instanceof VersionedBytesStore)) { | ||
| throw new IllegalStateException("VersionedBytesStoreSupplier.get() must return an instance of VersionedBytesStore"); | ||
| } | ||
|
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| final Serde<ValueAndTimestamp<V>> valueAndTimestampSerde = valueSerde == null | ||
| ? null | ||
| : new NullableValueAndTimestampSerde<>(valueSerde); | ||
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| return new MeteredVersionedKeyValueStore<>( | ||
| maybeWrapLogging((VersionedBytesStore) store), // no caching layer for versioned stores | ||
| storeSupplier.metricsScope(), | ||
| time, | ||
| keySerde, | ||
| valueAndTimestampSerde); | ||
| } | ||
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| @Override | ||
| public StoreBuilder<VersionedKeyValueStore<K, V>> withCachingEnabled() { | ||
| throw new IllegalStateException("Versioned stores do not support caching"); | ||
| } | ||
|
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| private VersionedBytesStore maybeWrapLogging(final VersionedBytesStore inner) { | ||
| if (!enableLogging) { | ||
| return inner; | ||
| } | ||
| return new ChangeLoggingVersionedKeyValueBytesStore(inner); | ||
| } | ||
| } |
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While renaming this class in IntelliJ, I got a warning that a class with this name existed in a previous version of Kafka Streams. I think this is fine since it's an internal class, but wanted to call it out in case there are compatibility concerns I'm not aware of.