/* * 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.kafka.common.metrics.stats; import java.util.List; import org.apache.kafka.common.metrics.MetricConfig; /** * A {@link SampledStat} that maintains a simple average over its samples. */ public class Avg extends SampledStat { public Avg() { super(0.0); } @Override protected void update(Sample sample, MetricConfig config, double value, long now) { sample.value += value; } @Override public double combine(List<Sample> samples, MetricConfig config, long now) { double total = 0.0; long count = 0; for (Sample s : samples) { total += s.value; count += s.eventCount; } return count == 0 ? 0 : total / count; } }