| /** |
| * 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.alertservice.prototype; |
| |
| import org.apache.ambari.metrics.alertservice.prototype.core.RFunctionInvoker; |
| import org.apache.ambari.metrics.alertservice.prototype.methods.MetricAnomaly; |
| import org.apache.ambari.metrics.alertservice.prototype.methods.ema.EmaTechnique; |
| import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric; |
| import org.junit.Assert; |
| import org.junit.Assume; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| import java.io.File; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| import java.util.List; |
| import java.util.TreeMap; |
| |
| import static org.apache.ambari.metrics.alertservice.prototype.TestRFunctionInvoker.getTS; |
| |
| public class TestEmaTechnique { |
| |
| private static double[] ts; |
| private static String fullFilePath; |
| |
| @BeforeClass |
| public static void init() throws URISyntaxException { |
| |
| Assume.assumeTrue(System.getenv("R_HOME") != null); |
| ts = getTS(1000); |
| URL url = ClassLoader.getSystemResource("R-scripts"); |
| fullFilePath = new File(url.toURI()).getAbsolutePath(); |
| RFunctionInvoker.setScriptsDir(fullFilePath); |
| } |
| |
| @Test |
| public void testEmaInitialization() { |
| |
| EmaTechnique ema = new EmaTechnique(0.5, 3); |
| Assert.assertTrue(ema.getTrackedEmas().isEmpty()); |
| Assert.assertTrue(ema.getStartingWeight() == 0.5); |
| Assert.assertTrue(ema.getStartTimesSdev() == 2); |
| } |
| |
| @Test |
| public void testEma() { |
| EmaTechnique ema = new EmaTechnique(0.5, 3); |
| |
| long now = System.currentTimeMillis(); |
| |
| TimelineMetric metric1 = new TimelineMetric(); |
| metric1.setMetricName("M1"); |
| metric1.setHostName("H1"); |
| metric1.setStartTime(now - 1000); |
| metric1.setAppId("A1"); |
| metric1.setInstanceId(null); |
| metric1.setType("Integer"); |
| |
| //Train |
| TreeMap<Long, Double> metricValues = new TreeMap<Long, Double>(); |
| for (int i = 0; i < 50; i++) { |
| double metric = 20000 + Math.random(); |
| metricValues.put(now - i * 100, metric); |
| } |
| metric1.setMetricValues(metricValues); |
| List<MetricAnomaly> anomalyList = ema.test(metric1); |
| // Assert.assertTrue(anomalyList.isEmpty()); |
| |
| metricValues = new TreeMap<Long, Double>(); |
| for (int i = 0; i < 50; i++) { |
| double metric = 20000 + Math.random(); |
| metricValues.put(now - i * 100, metric); |
| } |
| metric1.setMetricValues(metricValues); |
| anomalyList = ema.test(metric1); |
| Assert.assertTrue(!anomalyList.isEmpty()); |
| int l1 = anomalyList.size(); |
| |
| Assert.assertTrue(ema.updateModel(metric1, false, 20)); |
| anomalyList = ema.test(metric1); |
| int l2 = anomalyList.size(); |
| Assert.assertTrue(l2 < l1); |
| |
| Assert.assertTrue(ema.updateModel(metric1, true, 50)); |
| anomalyList = ema.test(metric1); |
| int l3 = anomalyList.size(); |
| Assert.assertTrue(l3 > l2 && l3 > l1); |
| |
| } |
| } |