/*
* 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.streaming.api.checkpoint;
import org.apache.flink.annotation.PublicEvolving;
import org.apache.flink.runtime.checkpoint.MasterTriggerRestoreHook;
/**
* This interface can be implemented by streaming functions that need to trigger a
* "global action" on the master (in the checkpoint coordinator) as part of every
* checkpoint and restore operation.
*
* @param <E> The type of the data stored by the hook in the checkpoint, or {@code Void}, if none.
*/
@PublicEvolving
public interface WithMasterCheckpointHook<E> extends java.io.Serializable {
/**
* Creates the hook that should be called by the checkpoint coordinator.
*/
MasterTriggerRestoreHook<E> createMasterTriggerRestoreHook();
}