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/**
* 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.cache;
import junit.framework.Assert;
import org.apache.hadoop.metrics2.sink.timeline.PostProcessingUtil;
import org.apache.hadoop.metrics2.sink.timeline.SingleValuedTimelineMetric;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
public class PostProcessingUtilTest {
@Test
public void testInterpolateMissinData() throws Exception {
Map<Long, Double> metricValues = new TreeMap<Long, Double>();
long interval = 60*1000;
long currentTime = System.currentTimeMillis();
for(int i = 10; i>=1;i--) {
if (i%4 != 0 && i != 5) { //Skip time points 4,5,8
metricValues.put(currentTime - i*interval, (double)i);
}
}
metricValues = PostProcessingUtil.interpolateMissingData(metricValues, interval);
Assert.assertTrue(metricValues.size() == 10);
Iterator it = metricValues.entrySet().iterator();
double sum = 0;
while (it.hasNext()) {
Map.Entry entry = (Map.Entry)it.next();
sum+= (double)entry.getValue();
}
Assert.assertEquals(sum, 55.0);
}
@Test
public void testInterpolate() throws Exception {
long t2 = System.currentTimeMillis();
long t1 = t2 - 60000;
double interpolatedValue;
//Test Equal Values
interpolatedValue = PostProcessingUtil.interpolate((t1 + 30000), t1, 10.0, t2, 10.0);
Assert.assertEquals(interpolatedValue, 10.0);
//Test Linear increase Values
interpolatedValue = PostProcessingUtil.interpolate((t1 + 30000), t1, 10.0, t2, 20.0);
Assert.assertEquals(interpolatedValue, 15.0);
//Test Linear decrease Values
interpolatedValue = PostProcessingUtil.interpolate((t1 + 30000), t1, 20.0, t2, 10.0);
Assert.assertEquals(interpolatedValue, 15.0);
//Test interpolation with non mid point time
interpolatedValue = PostProcessingUtil.interpolate((t1 + 20000), t1, 15.0, t2, 30.0); // 1:2 ratio
Assert.assertEquals(interpolatedValue, 20.0);
//Test interpolation with past time
interpolatedValue = PostProcessingUtil.interpolate((t1 - 60000), t1, 20.0, t2, 30.0);
Assert.assertEquals(interpolatedValue, 10.0);
}
@Test
public void testLinearInterpolate() throws Exception {
long t2 = System.currentTimeMillis();
Map<Long, Double> valuesMap = new TreeMap<>();
valuesMap.put(t2 - 4 * 3000, 4.0);
valuesMap.put(t2 - 2 * 3000, 2.0);
valuesMap.put(t2 - 1 * 3000, 1.0);
List<Long> requiredTs = new ArrayList<Long>();
requiredTs.add(t2 - 5*3000);
requiredTs.add(t2 - 3*3000);
requiredTs.add(t2);
Map result = PostProcessingUtil.interpolate(valuesMap, requiredTs);
Assert.assertNotNull(result);
Assert.assertEquals(result.get(t2 - 5*3000), 5.0);
Assert.assertEquals(result.get(t2 - 3*3000), 3.0);
Assert.assertEquals(result.get(t2), 0.0);
System.out.println(result.toString());
}
}
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