| /* |
| * 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.jackrabbit.oak.cache; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutionException; |
| |
| import javax.annotation.Nonnull; |
| |
| import com.google.common.cache.Cache; |
| import com.google.common.cache.CacheBuilder; |
| import com.google.common.cache.Weigher; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class CacheStatsTest { |
| private static final String NAME = "cache stats"; |
| private static final int KEYS = 100; |
| |
| private final Weigher<Integer, Integer> weigher = new Weigher<Integer, Integer>() { |
| @Override |
| public int weigh(@Nonnull Integer key, @Nonnull Integer value) { |
| return 1; |
| } |
| }; |
| |
| private final Cache<Integer, Integer> cache = CacheBuilder.newBuilder() |
| .recordStats() |
| .maximumWeight(Long.MAX_VALUE) |
| .weigher(weigher) |
| .build(); |
| |
| private final CacheStats cacheStats = |
| new CacheStats(cache, NAME, weigher, Long.MAX_VALUE); |
| |
| private int misses; |
| private int fails; |
| private long loadTime; |
| |
| @Before |
| public void setup() { |
| for (int k = 0; k < KEYS; k++) { |
| cache.put(k, k); |
| } |
| |
| for (int k = 0; k < 100; k++) { |
| final int key = 4 * k; |
| try { |
| cache.get(key, new Callable<Integer>() { |
| @Override |
| public Integer call() throws Exception { |
| long t0 = System.nanoTime(); |
| try { |
| if (key % 10 == 0) { |
| fails++; |
| throw new Exception("simulated load failure"); |
| } else { |
| misses++; |
| return key; |
| } |
| } finally { |
| loadTime += System.nanoTime() - t0; |
| } |
| |
| } |
| }); |
| } catch (ExecutionException ignore) { } |
| } |
| } |
| |
| @Test |
| public void name() throws Exception { |
| assertEquals(NAME, cacheStats.getName()); |
| } |
| |
| @Test |
| public void getRequestCount() { |
| assertEquals(KEYS, cacheStats.getRequestCount()); |
| } |
| |
| @Test |
| public void getHitCount() { |
| assertEquals(KEYS - misses - fails, cacheStats.getHitCount()); |
| } |
| |
| @Test |
| public void getHitRate() { |
| assertEquals((KEYS - (double) misses - fails)/KEYS, cacheStats.getHitRate(), Double.MIN_VALUE); |
| } |
| |
| @Test |
| public void getMissCount() { |
| assertEquals(misses + fails, cacheStats.getMissCount()); |
| } |
| |
| @Test |
| public void getMissRate() { |
| assertEquals(((double)misses + fails)/KEYS, cacheStats.getMissRate(), Double.MIN_VALUE); |
| } |
| |
| @Test |
| public void getLoadCount() { |
| assertEquals(misses + fails, cacheStats.getLoadCount()); |
| } |
| |
| @Test |
| public void getLoadSuccessCount() { |
| assertEquals(misses, cacheStats.getLoadSuccessCount()); |
| } |
| |
| @Test |
| public void getLoadExceptionCount() { |
| assertEquals(fails, cacheStats.getLoadExceptionCount()); |
| } |
| |
| @Test |
| public void getLoadExceptionRate() { |
| assertEquals((double)fails/(misses + fails), cacheStats.getLoadExceptionRate(), Double.MIN_VALUE); |
| } |
| |
| @Test |
| public void getTotalLoadTime() { |
| assertTrue(loadTime <= cacheStats.getTotalLoadTime()); |
| } |
| |
| @Test |
| public void getAverageLoadPenalty() { |
| assertTrue(((double)loadTime/(misses + fails)) <= cacheStats.getAverageLoadPenalty()); |
| } |
| |
| @Test |
| public void getEvictionCount() { |
| assertEquals(0, cacheStats.getEvictionCount()); |
| } |
| |
| @Test |
| public void getElementCount() { |
| assertEquals(KEYS + misses, cacheStats.getElementCount()); |
| } |
| |
| @Test |
| public void getMaxTotalWeight() { |
| assertEquals(Long.MAX_VALUE, cacheStats.getMaxTotalWeight()); |
| } |
| |
| @Test |
| public void estimateCurrentWeight() { |
| assertEquals(KEYS + misses, cacheStats.estimateCurrentWeight()); |
| } |
| |
| @Test |
| public void resetStats() { |
| cacheStats.resetStats(); |
| assertEquals(0, cacheStats.getRequestCount()); |
| assertEquals(0, cacheStats.getHitCount()); |
| assertEquals(1.0, cacheStats.getHitRate(), Double.MIN_VALUE); |
| assertEquals(0, cacheStats.getMissCount()); |
| assertEquals(0.0, cacheStats.getMissRate(), Double.MIN_VALUE); |
| assertEquals(0, cacheStats.getLoadCount()); |
| assertEquals(0, cacheStats.getLoadSuccessCount()); |
| assertEquals(0, cacheStats.getLoadExceptionCount()); |
| assertEquals(0, cacheStats.getLoadExceptionRate(), Double.MIN_VALUE); |
| assertEquals(0, cacheStats.getTotalLoadTime()); |
| assertEquals(0, cacheStats.getAverageLoadPenalty(), Double.MIN_VALUE); |
| assertEquals(0, cacheStats.getEvictionCount()); |
| assertEquals(KEYS + misses, cacheStats.getElementCount()); |
| assertEquals(Long.MAX_VALUE, cacheStats.getMaxTotalWeight()); |
| assertEquals(KEYS + misses, cacheStats.estimateCurrentWeight()); |
| } |
| } |