kafka StateRestoreCallback 源码
kafka StateRestoreCallback 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/processor/StateRestoreCallback.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.processor;
/**
* Restoration logic for log-backed state stores upon restart,
* it takes one record at a time from the logs to apply to the restoring state.
*/
public interface StateRestoreCallback {
void restore(byte[] key, byte[] value);
}
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