| /** |
| * 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.hadoop.metrics2.sink.timeline; |
| |
| |
| import org.codehaus.jackson.annotate.JsonCreator; |
| import org.codehaus.jackson.annotate.JsonProperty; |
| |
| /** |
| * Represents a collection of minute based aggregation of values for |
| * resolution greater than a minute. |
| */ |
| public class MetricHostAggregate extends MetricAggregate { |
| |
| private long numberOfSamples = 0; |
| |
| @JsonCreator |
| public MetricHostAggregate() { |
| super(0.0, 0.0, Double.MIN_VALUE, Double.MAX_VALUE); |
| } |
| |
| public MetricHostAggregate(Double sum, int numberOfSamples, |
| Double deviation, |
| Double max, Double min) { |
| super(sum, deviation, max, min); |
| this.numberOfSamples = numberOfSamples; |
| } |
| |
| @JsonProperty("numberOfSamples") |
| public long getNumberOfSamples() { |
| return numberOfSamples == 0 ? 1 : numberOfSamples; |
| } |
| |
| public void updateNumberOfSamples(long count) { |
| this.numberOfSamples += count; |
| } |
| |
| public void setNumberOfSamples(long numberOfSamples) { |
| this.numberOfSamples = numberOfSamples; |
| } |
| |
| public double calculateAverage() { |
| return sum / numberOfSamples; |
| } |
| |
| /** |
| * Find and update min, max and avg for a minute |
| */ |
| public void updateAggregates(MetricHostAggregate hostAggregate) { |
| updateMax(hostAggregate.getMax()); |
| updateMin(hostAggregate.getMin()); |
| updateSum(hostAggregate.getSum()); |
| updateNumberOfSamples(hostAggregate.getNumberOfSamples()); |
| } |
| |
| @Override |
| public String toString() { |
| return "MetricHostAggregate{" + |
| "sum=" + sum + |
| ", numberOfSamples=" + numberOfSamples + |
| ", deviation=" + deviation + |
| ", max=" + max + |
| ", min=" + min + |
| '}'; |
| } |
| } |