kafka KeyValueBytesStoreSupplier 源码
kafka KeyValueBytesStoreSupplier 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/state/KeyValueBytesStoreSupplier.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.state;
import org.apache.kafka.common.utils.Bytes;
/**
* A store supplier that can be used to create one or more {@link KeyValueStore KeyValueStore<Bytes, byte[]>} instances of type <Bytes, byte[]>.
*
* For any stores implementing the {@link KeyValueStore KeyValueStore<Bytes, byte[]>} interface, null value bytes are considered as "not exist". This means:
*
* <ol>
* <li>Null value bytes in put operations should be treated as delete.</li>
* <li>If the key does not exist, get operations should return null value bytes.</li>
* </ol>
*/
public interface KeyValueBytesStoreSupplier extends StoreSupplier<KeyValueStore<Bytes, byte[]>> {
}
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