org.apache.flink.streaming.api.graph.FunctionMasterCheckpointHookFactory 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.streaming.api.graph;
import org.apache.flink.runtime.checkpoint.MasterTriggerRestoreHook;
import org.apache.flink.streaming.api.checkpoint.WithMasterCheckpointHook;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* Utility class that turns a {@link WithMasterCheckpointHook} into a
* {@link org.apache.flink.runtime.checkpoint.MasterTriggerRestoreHook.Factory}.
*/
class FunctionMasterCheckpointHookFactory implements MasterTriggerRestoreHook.Factory {
private static final long serialVersionUID = 2L;
private final WithMasterCheckpointHook creator;
FunctionMasterCheckpointHookFactory(WithMasterCheckpointHook creator) {
this.creator = checkNotNull(creator);
}
@SuppressWarnings("unchecked")
@Override
public MasterTriggerRestoreHook create() {
return (MasterTriggerRestoreHook) creator.createMasterTriggerRestoreHook();
}
}