org.apache.kafka.streams.state.internals.CachedStateStore Maven / Gradle / Ivy
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* 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,
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*/
package org.apache.kafka.streams.state.internals;
public interface CachedStateStore {
/**
* Set the {@link CacheFlushListener} to be notified when entries are flushed from the
* cache to the underlying {@link org.apache.kafka.streams.processor.StateStore}
* @param listener
* @param sendOldValues
*/
boolean setFlushListener(final CacheFlushListener listener,
final boolean sendOldValues);
/**
* Flush only the cache but not the underlying state stores
*
* TODO: this is a hacky workaround for now, should be removed when we decouple caching with emitting
*/
void flushCache();
}