/*
* 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.Time;
import org.apache.kafka.streams.state.KeyValueStore;
import java.util.Map;
/**
* An in-memory key-value store based on a TreeMap.
*
* Note that the use of array-typed keys is discouraged because they result in incorrect ordering behavior.
* If you intend to work on byte arrays as key, for example, you may want to wrap them with the {@code Bytes} class,
* i.e. use {@code RocksDBStore<Bytes, ...>} rather than {@code RocksDBStore<byte[], ...>}.
*
* @param <K> The key type
* @param <V> The value type
*
* @see org.apache.kafka.streams.state.Stores#create(String)
*/
public class InMemoryKeyValueStoreSupplier<K, V> extends AbstractStoreSupplier<K, V, KeyValueStore> {
public InMemoryKeyValueStoreSupplier(String name, Serde<K> keySerde, Serde<V> valueSerde, boolean logged, Map<String, String> logConfig) {
this(name, keySerde, valueSerde, null, logged, logConfig);
}
public InMemoryKeyValueStoreSupplier(String name, Serde<K> keySerde, Serde<V> valueSerde, Time time, boolean logged, Map<String, String> logConfig) {
super(name, keySerde, valueSerde, time, logged, logConfig);
}
public KeyValueStore get() {
InMemoryKeyValueStore<K, V> store = new InMemoryKeyValueStore<>(name, keySerde, valueSerde);
return new MeteredKeyValueStore<>(logged ? store.enableLogging() : store, "in-memory-state", time);
}
}