kafka TimestampedKeyValueStoreMaterializer 源码
kafka TimestampedKeyValueStoreMaterializer 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/kstream/internals/TimestampedKeyValueStoreMaterializer.java
/*
* 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.state.KeyValueBytesStoreSupplier;
import org.apache.kafka.streams.state.KeyValueStore;
import org.apache.kafka.streams.state.StoreBuilder;
import org.apache.kafka.streams.state.Stores;
import org.apache.kafka.streams.state.TimestampedKeyValueStore;
public class TimestampedKeyValueStoreMaterializer<K, V> {
private final MaterializedInternal<K, V, KeyValueStore<Bytes, byte[]>> materialized;
public TimestampedKeyValueStoreMaterializer(final MaterializedInternal<K, V, KeyValueStore<Bytes, byte[]>> materialized) {
this.materialized = materialized;
}
/**
* @return StoreBuilder
*/
public StoreBuilder<TimestampedKeyValueStore<K, V>> materialize() {
KeyValueBytesStoreSupplier supplier = (KeyValueBytesStoreSupplier) materialized.storeSupplier();
if (supplier == null) {
switch (materialized.storeType()) {
case IN_MEMORY:
supplier = Stores.inMemoryKeyValueStore(materialized.storeName());
break;
case ROCKS_DB:
supplier = Stores.persistentTimestampedKeyValueStore(materialized.storeName());
break;
default:
throw new IllegalStateException("Unknown store type: " + materialized.storeType());
}
}
final StoreBuilder<TimestampedKeyValueStore<K, V>> builder = Stores.timestampedKeyValueStoreBuilder(
supplier,
materialized.keySerde(),
materialized.valueSerde());
if (materialized.loggingEnabled()) {
builder.withLoggingEnabled(materialized.logConfig());
} else {
builder.withLoggingDisabled();
}
if (materialized.cachingEnabled()) {
builder.withCachingEnabled();
}
return builder;
}
}
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