org.apache.flink.runtime.state.KeyedStateFunction 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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* See the License for the specific language governing permissions and
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*/
package org.apache.flink.runtime.state;
import org.apache.flink.api.common.state.State;
/**
* A function to be applied to all keyed states.
*
* @param The type of key.
* @param The type of state.
*/
@FunctionalInterface
public interface KeyedStateFunction {
/**
* The actual method to be applied on each of the states.
*
* @param key the key whose state is being processed.
* @param state the state associated with the aforementioned key.
*/
void process(K key, S state) throws Exception;
}