org.apache.flink.runtime.healthmanager.metrics.timeline.LatestTimelineAggregator 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.healthmanager.metrics.timeline;
import org.apache.flink.api.java.tuple.Tuple2;
/**
* Calculate value range of the metric in given interval.
*/
public class LatestTimelineAggregator extends TimelineAggregator {
private long nextIntervalKey = -1;
private long lastTimestamp = -1;
private double lastValue = Double.NEGATIVE_INFINITY;
public LatestTimelineAggregator(long interval) {
super(0, interval);
}
public LatestTimelineAggregator(long startTime, long interval) {
super(startTime, interval);
}
@Override
public void updateTimestamp(long timestamp) {
long intervalKey = getIntervalKey(timestamp);
if (nextIntervalKey < intervalKey) {
if (lastTimestamp > 0) {
currentTimestamp = nextIntervalKey;
currentValue = lastValue;
}
nextIntervalKey = intervalKey;
lastValue = Double.NEGATIVE_INFINITY;
lastTimestamp = -1;
}
}
@Override
public void addValue(Tuple2 value) {
long intervalKey = getIntervalKey(value.f0);
if (nextIntervalKey == intervalKey) {
if (value.f0 > lastTimestamp) {
lastValue = value.f1;
lastTimestamp = value.f0;
}
} else if (nextIntervalKey < intervalKey) {
if (lastTimestamp > 0) {
currentTimestamp = nextIntervalKey;
currentValue = lastValue;
}
nextIntervalKey = intervalKey;
lastValue = value.f1;
lastTimestamp = value.f0;
}
}
@Override
public Tuple2 getPartialValue() {
if (nextIntervalKey > 0) {
return Tuple2.of(nextIntervalKey, lastValue);
} else {
return null;
}
}
}