org.apache.flink.runtime.checkpoint.StandaloneCheckpointIDCounter 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,
* 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.checkpoint;
import org.apache.flink.api.common.JobStatus;
import org.apache.flink.runtime.jobmanager.HighAvailabilityMode;
import java.util.concurrent.atomic.AtomicLong;
/**
* {@link CheckpointIDCounter} instances for JobManagers running in {@link HighAvailabilityMode#NONE}.
*
* Simple wrapper around an {@link AtomicLong}.
*/
public class StandaloneCheckpointIDCounter implements CheckpointIDCounter {
private final AtomicLong checkpointIdCounter = new AtomicLong(1);
@Override
public void start() throws Exception {}
@Override
public void shutdown(JobStatus jobStatus) throws Exception {}
@Override
public long getAndIncrement() throws Exception {
return checkpointIdCounter.getAndIncrement();
}
@Override
public long get() {
return checkpointIdCounter.get();
}
@Override
public void setCount(long newCount) {
checkpointIdCounter.set(newCount);
}
/**
* Returns the last checkpoint ID (current - 1).
*
* @return Last checkpoint ID.
*/
public long getLast() {
return checkpointIdCounter.get() - 1;
}
}