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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 org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
import org.junit.Test;
import java.util.Map;
import java.util.TreeMap;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
public class TimelineMetricsCacheTest {
private static final long DEFAULT_START_TIME = 1411023766;
private static final String METRIC_NAME = "Test name";
private static final double delta = 0.00001;
private final TimelineMetricsCache timelineMetricsCache =
new TimelineMetricsCache(TimelineMetricsCache.MAX_RECS_PER_NAME_DEFAULT,
TimelineMetricsCache.MAX_EVICTION_TIME_MILLIS);
@Test
public void testPutGetCounterTimelineMetric() throws Exception {
TimelineMetric metric = createTimelineMetric(new TreeMap<Long, Double>() {{
put(1L, 10.0);
}}, DEFAULT_START_TIME);
timelineMetricsCache.putTimelineMetric(metric, true);
metric = createTimelineMetric(new TreeMap<Long, Double>() {{
put(2L, 10.0);
put(3L, 20.0);
put(4L, 30.0);
}}, DEFAULT_START_TIME + 2 * TimelineMetricsCache.MAX_EVICTION_TIME_MILLIS);
timelineMetricsCache.putTimelineMetric(metric, true);
TimelineMetric cachedMetric
= timelineMetricsCache.getTimelineMetric(METRIC_NAME);
assertEquals(0, cachedMetric.getMetricValues().get(1L), delta);
assertEquals(0, cachedMetric.getMetricValues().get(2L), delta);
assertEquals(10, cachedMetric.getMetricValues().get(3L), delta);
assertEquals(10, cachedMetric.getMetricValues().get(4L), delta);
metric = createTimelineMetric(new TreeMap<Long, Double>() {{
put(5L, 100.0);
put(6L, 120.0);
put(7L, 230.0);
}}, DEFAULT_START_TIME + 3 * TimelineMetricsCache.MAX_EVICTION_TIME_MILLIS);
timelineMetricsCache.putTimelineMetric(metric, true);
metric = createTimelineMetric(new TreeMap<Long, Double>() {{
put(8L, 300.0);
}}, DEFAULT_START_TIME + 5 * TimelineMetricsCache.MAX_EVICTION_TIME_MILLIS);
timelineMetricsCache.putTimelineMetric(metric, true);
cachedMetric = timelineMetricsCache.getTimelineMetric(METRIC_NAME);
assertEquals(70, cachedMetric.getMetricValues().get(5L), delta);
assertEquals(20, cachedMetric.getMetricValues().get(6L), delta);
assertEquals(110, cachedMetric.getMetricValues().get(7L), delta);
assertEquals(70, cachedMetric.getMetricValues().get(8L), delta);
}
@Test
public void testMaxRecsPerName() throws Exception {
int maxRecsPerName = 2;
int maxEvictionTime = TimelineMetricsCache.MAX_EVICTION_TIME_MILLIS ;
TimelineMetricsCache timelineMetricsCache =
new TimelineMetricsCache(maxRecsPerName, maxEvictionTime);
// put 2 metrics , no cache overflow
timelineMetricsCache.putTimelineMetric(
createTimelineMetricSingleValue(DEFAULT_START_TIME ));
timelineMetricsCache.putTimelineMetric(
createTimelineMetricSingleValue(DEFAULT_START_TIME + maxEvictionTime * 2));
TimelineMetric cachedMetric = timelineMetricsCache.getTimelineMetric(METRIC_NAME);
assertNotNull(cachedMetric);
assertFalse(cachedMetric.getMetricValues().isEmpty());
assertEquals("2 values added.", 2, cachedMetric.getMetricValues().size());
assertEquals(DEFAULT_START_TIME, cachedMetric.getStartTime());
// put 3 metrics, no cache overflow. check is performed before put operation
timelineMetricsCache.putTimelineMetric(
createTimelineMetricSingleValue(DEFAULT_START_TIME ));
timelineMetricsCache.putTimelineMetric(
createTimelineMetricSingleValue(DEFAULT_START_TIME + maxEvictionTime * 2));
timelineMetricsCache.putTimelineMetric(
createTimelineMetricSingleValue(DEFAULT_START_TIME + maxEvictionTime * 3));
cachedMetric = timelineMetricsCache.getTimelineMetric(METRIC_NAME);
assertNotNull(cachedMetric);
assertFalse(cachedMetric.getMetricValues().isEmpty());
assertEquals("3 values added.", 3, cachedMetric.getMetricValues().size());
assertEquals(DEFAULT_START_TIME, cachedMetric.getStartTime());
// put 4 metric values, cache cleaned.
timelineMetricsCache.putTimelineMetric(
createTimelineMetricSingleValue(DEFAULT_START_TIME ));
timelineMetricsCache.putTimelineMetric(
createTimelineMetricSingleValue(DEFAULT_START_TIME + maxEvictionTime * 2));
timelineMetricsCache.putTimelineMetric(
createTimelineMetricSingleValue(DEFAULT_START_TIME + maxEvictionTime * 3));
timelineMetricsCache.putTimelineMetric(
createTimelineMetricSingleValue(DEFAULT_START_TIME + maxEvictionTime * 4));
cachedMetric = timelineMetricsCache.getTimelineMetric(METRIC_NAME);
assertNotNull(cachedMetric);
assertFalse(cachedMetric.getMetricValues().isEmpty());
// check is performed before put operation. while putting 4th metric value,
// the first value deleted
assertEquals("1 metric value should have been removed", 3, cachedMetric.getMetricValues().size());
// first metric value was removed, starttime == second metric value starttime
assertEquals(DEFAULT_START_TIME + maxEvictionTime * 2, cachedMetric.getStartTime());
}
private TimelineMetric createTimelineMetricSingleValue(final long startTime) {
TreeMap<Long, Double> values = new TreeMap<Long, Double>();
values.put(startTime, 0.0);
return createTimelineMetric(values, startTime);
}
private TimelineMetric createTimelineMetric(Map<Long, Double> metricValues,
long startTime) {
TimelineMetric timelineMetric = new TimelineMetric();
timelineMetric.setMetricName(METRIC_NAME);
timelineMetric.setHostName("Test hostName");
timelineMetric.setAppId("test serviceName");
timelineMetric.setStartTime(startTime);
timelineMetric.setType("Number");
timelineMetric.setMetricValues(new TreeMap<Long, Double>(metricValues));
return timelineMetric;
}
}
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