org.apache.flink.runtime.rest.handler.legacy.backpressure.VoidBackPressureStatsTracker 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.rest.handler.legacy.backpressure;
import org.apache.flink.runtime.executiongraph.ExecutionJobVertex;
import java.util.Optional;
/**
* {@link BackPressureStatsTracker} implementation which always returns no back pressure statistics.
*/
public enum VoidBackPressureStatsTracker implements BackPressureStatsTracker {
INSTANCE {
@Override
public Optional getOperatorBackPressureStats(ExecutionJobVertex vertex) {
return Optional.empty();
}
@Override
public void cleanUpOperatorStatsCache() {
// nothing to do
}
@Override
public void shutDown() {
// nothing to do
}
}
}