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* 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
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* KIND, either express or implied. See the License for the
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package org.apache.brooklyn.enricher.stock;
import static org.testng.Assert.assertEquals;
import org.apache.brooklyn.api.entity.EntitySpec;
import org.apache.brooklyn.api.mgmt.SubscriptionContext;
import org.apache.brooklyn.api.sensor.AttributeSensor;
import org.apache.brooklyn.api.sensor.EnricherSpec;
import org.apache.brooklyn.core.entity.AbstractApplication;
import org.apache.brooklyn.core.entity.Entities;
import org.apache.brooklyn.core.sensor.BasicAttributeSensor;
import org.apache.brooklyn.core.sensor.BasicSensorEvent;
import org.apache.brooklyn.enricher.stock.YamlRollingTimeWindowMeanEnricher;
import org.apache.brooklyn.enricher.stock.YamlTimeWeightedDeltaEnricher;
import org.apache.brooklyn.enricher.stock.YamlRollingTimeWindowMeanEnricher.ConfidenceQualifiedNumber;
import org.apache.brooklyn.entity.stock.BasicEntity;
import org.apache.brooklyn.util.time.Duration;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
public class YamlRollingTimeWindowMeanEnricherTest {
AbstractApplication app;
BasicEntity producer;
AttributeSensor<Integer> intSensor;
AttributeSensor<Double> avgSensor, deltaSensor;
Duration timePeriod = Duration.ONE_SECOND;
YamlTimeWeightedDeltaEnricher<Double> delta;
YamlRollingTimeWindowMeanEnricher<Double> averager;
ConfidenceQualifiedNumber average;
SubscriptionContext subscription;
@SuppressWarnings("unchecked")
@BeforeMethod
public void before() {
app = new AbstractApplication() {};
Entities.startManagement(app);
producer = app.addChild(EntitySpec.create(BasicEntity.class));
intSensor = new BasicAttributeSensor<Integer>(Integer.class, "int sensor");
deltaSensor = new BasicAttributeSensor<Double>(Double.class, "delta sensor");
avgSensor = new BasicAttributeSensor<Double>(Double.class, "avg sensor");
delta = producer.enrichers().add(EnricherSpec.create(YamlTimeWeightedDeltaEnricher.class)
.configure(YamlTimeWeightedDeltaEnricher.PRODUCER, producer)
.configure(YamlTimeWeightedDeltaEnricher.SOURCE_SENSOR, intSensor)
.configure(YamlTimeWeightedDeltaEnricher.TARGET_SENSOR, deltaSensor));
averager = producer.enrichers().add(EnricherSpec.create(YamlRollingTimeWindowMeanEnricher.class)
.configure(YamlRollingTimeWindowMeanEnricher.PRODUCER, producer)
.configure(YamlRollingTimeWindowMeanEnricher.SOURCE_SENSOR, deltaSensor)
.configure(YamlRollingTimeWindowMeanEnricher.TARGET_SENSOR, avgSensor)
.configure(YamlRollingTimeWindowMeanEnricher.WINDOW_DURATION, timePeriod));
}
@AfterMethod(alwaysRun=true)
public void tearDown() throws Exception {
if (app != null) Entities.destroyAll(app.getManagementContext());
}
@Test
public void testDefaultAverageWhenEmpty() {
ConfidenceQualifiedNumber average = averager.getAverage(0, 0);
assertEquals(average.value, 0d);
assertEquals(average.confidence, 0.0d);
}
protected BasicSensorEvent<Integer> newIntSensorEvent(int value, long timestamp) {
return new BasicSensorEvent<Integer>(intSensor, producer, value, timestamp);
}
protected BasicSensorEvent<Double> newDeltaSensorEvent(double value, long timestamp) {
return new BasicSensorEvent<Double>(deltaSensor, producer, value, timestamp);
}
@Test
public void testNoRecentValuesAverage() {
averager.onEvent(newDeltaSensorEvent(10, 0));
average = averager.getAverage(timePeriod.toMilliseconds()+1000, 0);
assertEquals(average.value, 10d);
assertEquals(average.confidence, 0d);
}
@Test
public void testNoRecentValuesUsesLastForAverage() {
averager.onEvent(newDeltaSensorEvent(10, 0));
averager.onEvent(newDeltaSensorEvent(20, 10));
average = averager.getAverage(timePeriod.toMilliseconds()+1000, 0);
assertEquals(average.value, 20d);
assertEquals(average.confidence, 0d);
}
@Test
public void testSingleValueTimeAverage() {
averager.onEvent(newDeltaSensorEvent(10, 1000));
average = averager.getAverage(1000, 0);
assertEquals(average.confidence, 0d);
}
@Test
public void testTwoValueAverageForPeriod() {
averager.onEvent(newDeltaSensorEvent(10, 1000));
averager.onEvent(newDeltaSensorEvent(10, 2000));
average = averager.getAverage(2000, 0);
assertEquals(average.value, 10 /1d);
assertEquals(average.confidence, 1d);
}
@Test
public void testMonospacedAverage() {
averager.onEvent(newDeltaSensorEvent(10, 1000));
averager.onEvent(newDeltaSensorEvent(20, 1250));
averager.onEvent(newDeltaSensorEvent(30, 1500));
averager.onEvent(newDeltaSensorEvent(40, 1750));
averager.onEvent(newDeltaSensorEvent(50, 2000));
average = averager.getAverage(2000, 0);
assertEquals(average.value, (20+30+40+50)/4d);
assertEquals(average.confidence, 1d);
}
@Test
public void testWeightedAverage() {
averager.onEvent(newDeltaSensorEvent(10, 1000));
averager.onEvent(newDeltaSensorEvent(20, 1100));
averager.onEvent(newDeltaSensorEvent(30, 1300));
averager.onEvent(newDeltaSensorEvent(40, 1600));
averager.onEvent(newDeltaSensorEvent(50, 2000));
average = averager.getAverage(2000, 0);
assertEquals(average.value, (20*0.1d)+(30*0.2d)+(40*0.3d)+(50*0.4d));
assertEquals(average.confidence, 1d);
}
@Test
public void testConfidenceDecay() {
averager.onEvent(newDeltaSensorEvent(10, 1000));
averager.onEvent(newDeltaSensorEvent(20, 1250));
averager.onEvent(newDeltaSensorEvent(30, 1500));
averager.onEvent(newDeltaSensorEvent(40, 1750));
averager.onEvent(newDeltaSensorEvent(50, 2000));
average = averager.getAverage(2250, 0);
assertEquals(average.value, (30+40+50)/3d);
assertEquals(average.confidence, 0.75d);
average = averager.getAverage(2500, 0);
assertEquals(average.value, (40+50)/2d);
assertEquals(average.confidence, 0.5d);
average = averager.getAverage(2750, 0);
assertEquals(average.value, 50d);
assertEquals(average.confidence, 0.25d);
average = averager.getAverage(3000, 0);
assertEquals(average.value, 50d);
assertEquals(average.confidence, 0d);
}
}