org.apache.kafka.streams.state.internals.AsyncKeyValueStoreBuilder Maven / Gradle / Ivy
/*
* Copyright 2024 Responsive Computing, Inc.
*
* Licensed 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 dev.responsive.kafka.api.async.internals.stores.AbstractAsyncStoreBuilder;
import dev.responsive.kafka.api.async.internals.stores.AsyncFlushingKeyValueStore;
import dev.responsive.kafka.internal.stores.ResponsiveStoreBuilder;
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.KeyValueBytesStoreSupplier;
import org.apache.kafka.streams.state.KeyValueStore;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Essentially a copy of the {@link KeyValueStoreBuilder} class that
* allows us to inject an additional layer, the {@link AsyncFlushingKeyValueStore}.
* We also use this builder to coordinate between the async processor (which is
* responsible for creating this builder) and the async flushing store (which is
* created by this builder).
*/
public class AsyncKeyValueStoreBuilder
extends AbstractAsyncStoreBuilder> {
private static final Logger LOG =
LoggerFactory.getLogger(AsyncKeyValueStoreBuilder.class);
private final KeyValueBytesStoreSupplier storeSupplier;
@SuppressWarnings("unchecked")
public AsyncKeyValueStoreBuilder(
final ResponsiveStoreBuilder responsiveBuilder
) {
this(
(KeyValueBytesStoreSupplier) responsiveBuilder.storeSupplier(),
(Serde) responsiveBuilder.keySerde(),
responsiveBuilder.innerValueSerde(),
responsiveBuilder.time()
);
}
private AsyncKeyValueStoreBuilder(
final KeyValueBytesStoreSupplier storeSupplier,
final Serde keySerde,
final Serde valueSerde,
final Time time
) {
super(
storeSupplier.name(),
keySerde,
valueSerde,
time
);
this.storeSupplier = storeSupplier;
LOG.debug("Created async KV store builder with valueSerde = {}", valueSerde);
}
@Override
public KeyValueStore build() {
final KeyValueStore store = storeSupplier.get();
return new MeteredKeyValueStore<>(
wrapAsyncFlushingKV(
maybeWrapCaching(
maybeWrapLogging(store))
),
storeSupplier.metricsScope(),
time,
keySerde,
valueSerde
);
}
private KeyValueStore maybeWrapCaching(final KeyValueStore inner) {
if (!cachingEnabled()) {
return inner;
}
return new CachingKeyValueStore(inner, true);
}
private KeyValueStore maybeWrapLogging(final KeyValueStore inner) {
if (!loggingEnabled()) {
return inner;
}
return new ChangeLoggingKeyValueBytesStore(inner);
}
}