org.apache.flink.runtime.state.FunctionInitializationContext Maven / Gradle / Ivy
/*
* 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.flink.runtime.state;
import org.apache.flink.annotation.PublicEvolving;
/**
* This interface provides a context in which user functions can initialize by registering to
* managed state (i.e. state that is managed by state backends).
*
* Operator state is available to all functions, while keyed state is only available for
* functions after keyBy.
*
*
For the purpose of initialization, the context signals if the state is empty or was restored
* from a previous execution.
*/
@PublicEvolving
public interface FunctionInitializationContext extends ManagedInitializationContext {}