| /* |
| * 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.ratis.server.impl; |
| |
| import static org.apache.ratis.server.metrics.RaftServerMetricsImpl.*; |
| import static org.junit.Assert.assertEquals; |
| |
| import org.apache.ratis.metrics.impl.RatisMetricRegistryImpl; |
| import org.apache.ratis.thirdparty.com.codahale.metrics.Gauge; |
| import org.apache.ratis.protocol.ClientInvocationId; |
| import org.apache.ratis.protocol.ClientId; |
| import org.apache.ratis.protocol.RaftGroupId; |
| import org.apache.ratis.protocol.RaftGroupMemberId; |
| import org.apache.ratis.protocol.RaftPeerId; |
| import org.apache.ratis.server.RaftServerConfigKeys; |
| import org.apache.ratis.server.metrics.RaftServerMetricsImpl; |
| import org.junit.After; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| import java.util.Map; |
| |
| /** |
| * Test for metrics of retry cache. |
| */ |
| public class TestRetryCacheMetrics { |
| private static RatisMetricRegistryImpl ratisMetricRegistry; |
| private static RetryCacheImpl retryCache; |
| |
| @BeforeClass |
| public static void setUp() { |
| RaftGroupId raftGroupId = RaftGroupId.randomId(); |
| RaftPeerId raftPeerId = RaftPeerId.valueOf("TestId"); |
| RaftGroupMemberId raftGroupMemberId = RaftGroupMemberId |
| .valueOf(raftPeerId, raftGroupId); |
| retryCache = new RetryCacheImpl(RaftServerConfigKeys.RetryCache.EXPIRY_TIME_DEFAULT, null); |
| |
| final RaftServerMetricsImpl raftServerMetrics = RaftServerMetricsImpl.computeIfAbsentRaftServerMetrics( |
| raftGroupMemberId, id -> 0L, retryCache::getStatistics); |
| ratisMetricRegistry = (RatisMetricRegistryImpl) raftServerMetrics.getRegistry(); |
| } |
| |
| @After |
| public void tearDown() { |
| retryCache.close(); |
| checkEntryCount(0); |
| } |
| |
| @Test |
| public void testRetryCacheEntryCount() { |
| checkEntryCount(0); |
| |
| ClientId clientId = ClientId.randomId(); |
| final ClientInvocationId key = ClientInvocationId.valueOf(clientId, 1); |
| final RetryCacheImpl.CacheEntry entry = new RetryCacheImpl.CacheEntry(key); |
| |
| retryCache.refreshEntry(entry); |
| checkEntryCount(1); |
| } |
| |
| @Test |
| public void testRetryCacheHitMissCount() { |
| checkHit(0, 1.0); |
| checkMiss(0, 0.0); |
| |
| final ClientInvocationId invocationId = ClientInvocationId.valueOf(ClientId.randomId(), 2); |
| retryCache.getOrCreateEntry(invocationId); |
| |
| checkHit(0, 0.0); |
| checkMiss(1, 1.0); |
| |
| retryCache.getOrCreateEntry(invocationId); |
| |
| checkHit(1, 0.5); |
| checkMiss(1, 0.5); |
| } |
| |
| private static void checkHit(long count, double rate) { |
| final long hitCount = (Long) ratisMetricRegistry.getGauges((s, metric) -> |
| s.contains(RETRY_CACHE_HIT_COUNT_METRIC)).values().iterator().next().getValue(); |
| assertEquals(hitCount, count); |
| |
| final double hitRate = (Double) ratisMetricRegistry.getGauges((s, metric) -> |
| s.contains(RETRY_CACHE_HIT_RATE_METRIC)).values().iterator().next().getValue(); |
| assertEquals(hitRate, rate, 0.0); |
| } |
| |
| private static void checkMiss(long count, double rate) { |
| final long missCount = (Long) ratisMetricRegistry.getGauges((s, metric) -> |
| s.contains(RETRY_CACHE_MISS_COUNT_METRIC)).values().iterator().next().getValue(); |
| assertEquals(missCount, count); |
| |
| final double missRate = (Double) ratisMetricRegistry.getGauges((s, metric) -> |
| s.contains(RETRY_CACHE_MISS_RATE_METRIC)).values().iterator().next().getValue(); |
| assertEquals(missRate, rate, 0.0); |
| } |
| |
| private static void checkEntryCount(long expected) { |
| final Map<String, Gauge> map = ratisMetricRegistry.getGauges( |
| (s, metric) -> s.contains(RETRY_CACHE_ENTRY_COUNT_METRIC)); |
| assertEquals(1, map.size()); |
| final Map.Entry<String, Gauge> entry = map.entrySet().iterator().next(); |
| assertEquals(expected, entry.getValue().getValue()); |
| } |
| } |