| /** |
| * 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.ambari.metrics.adservice.seriesgenerator; |
| |
| import java.util.Random; |
| |
| public class SteadyWithTurbulenceMetricSeries implements AbstractMetricSeries { |
| |
| double steadyStateValue = 0.0; |
| double steadyStateDeviationPercentage = 0.0; |
| double turbulentPeriodDeviationLowerPercentage = 0.3; |
| double turbulentPeriodDeviationHigherPercentage = 0.5; |
| int turbulentPeriodLength = 5; |
| int turbulentStatePosition = 1; |
| int approximateSeriesLength = 10; |
| |
| Random random = new Random(); |
| double valueDeviationLowerLimit; |
| double valueDeviationHigherLimit; |
| double tPeriodLowerLimit; |
| double tPeriodUpperLimit; |
| int tPeriodStartIndex = 0; |
| int index = 0; |
| |
| public SteadyWithTurbulenceMetricSeries(int approximateSeriesLength, |
| double steadyStateValue, |
| double steadyStateDeviationPercentage, |
| double turbulentPeriodDeviationLowerPercentage, |
| double turbulentPeriodDeviationHigherPercentage, |
| int turbulentPeriodLength, |
| int turbulentStatePosition) { |
| this.approximateSeriesLength = approximateSeriesLength; |
| this.steadyStateValue = steadyStateValue; |
| this.steadyStateDeviationPercentage = steadyStateDeviationPercentage; |
| this.turbulentPeriodDeviationLowerPercentage = turbulentPeriodDeviationLowerPercentage; |
| this.turbulentPeriodDeviationHigherPercentage = turbulentPeriodDeviationHigherPercentage; |
| this.turbulentPeriodLength = turbulentPeriodLength; |
| this.turbulentStatePosition = turbulentStatePosition; |
| init(); |
| } |
| |
| private void init() { |
| |
| if (turbulentStatePosition == 1) { |
| tPeriodStartIndex = (int) (0.25 * approximateSeriesLength + (0.25 * approximateSeriesLength * random.nextDouble())); |
| } else if (turbulentStatePosition == 2) { |
| tPeriodStartIndex = approximateSeriesLength - turbulentPeriodLength; |
| } |
| |
| valueDeviationLowerLimit = steadyStateValue - steadyStateDeviationPercentage * steadyStateValue; |
| valueDeviationHigherLimit = steadyStateValue + steadyStateDeviationPercentage * steadyStateValue; |
| |
| tPeriodLowerLimit = steadyStateValue + turbulentPeriodDeviationLowerPercentage * steadyStateValue; |
| tPeriodUpperLimit = steadyStateValue + turbulentPeriodDeviationHigherPercentage * steadyStateValue; |
| } |
| |
| @Override |
| public double nextValue() { |
| |
| double value; |
| |
| if (index >= tPeriodStartIndex && index <= (tPeriodStartIndex + turbulentPeriodLength)) { |
| value = tPeriodLowerLimit + (tPeriodUpperLimit - tPeriodLowerLimit) * random.nextDouble(); |
| } else { |
| value = valueDeviationLowerLimit + (valueDeviationHigherLimit - valueDeviationLowerLimit) * random.nextDouble(); |
| } |
| index++; |
| return value; |
| } |
| |
| @Override |
| public double[] getSeries(int n) { |
| |
| double[] series = new double[n]; |
| int turbulentPeriodStartIndex = 0; |
| |
| if (turbulentStatePosition == 1) { |
| turbulentPeriodStartIndex = (int) (0.25 * n + (0.25 * n * random.nextDouble())); |
| } else if (turbulentStatePosition == 2) { |
| turbulentPeriodStartIndex = n - turbulentPeriodLength; |
| } |
| |
| double valueDevLowerLimit = steadyStateValue - steadyStateDeviationPercentage * steadyStateValue; |
| double valueDevHigherLimit = steadyStateValue + steadyStateDeviationPercentage * steadyStateValue; |
| |
| double turbulentPeriodLowerLimit = steadyStateValue + turbulentPeriodDeviationLowerPercentage * steadyStateValue; |
| double turbulentPeriodUpperLimit = steadyStateValue + turbulentPeriodDeviationHigherPercentage * steadyStateValue; |
| |
| for (int i = 0; i < n; i++) { |
| if (i >= turbulentPeriodStartIndex && i < (turbulentPeriodStartIndex + turbulentPeriodLength)) { |
| series[i] = turbulentPeriodLowerLimit + (turbulentPeriodUpperLimit - turbulentPeriodLowerLimit) * random.nextDouble(); |
| } else { |
| series[i] = valueDevLowerLimit + (valueDevHigherLimit - valueDevLowerLimit) * random.nextDouble(); |
| } |
| } |
| |
| return series; |
| } |
| |
| } |