| /* |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.LogAppenderMetrics.FOLLOWER_MATCH_INDEX; |
| import static org.apache.ratis.server.metrics.LogAppenderMetrics.FOLLOWER_NEXT_INDEX; |
| import static org.apache.ratis.server.metrics.LogAppenderMetrics.FOLLOWER_RPC_RESP_TIME; |
| |
| import org.apache.ratis.metrics.impl.RatisMetricRegistryImpl; |
| import org.apache.ratis.protocol.RaftGroupId; |
| import org.apache.ratis.protocol.RaftGroupMemberId; |
| import org.apache.ratis.protocol.RaftPeerId; |
| import org.apache.ratis.server.metrics.LogAppenderMetrics; |
| import org.apache.ratis.util.Timestamp; |
| |
| import org.apache.ratis.thirdparty.com.codahale.metrics.Gauge; |
| import org.junit.jupiter.api.Assertions; |
| import org.junit.jupiter.api.BeforeEach; |
| import org.junit.jupiter.api.Test; |
| |
| public class TestLogAppenderMetrics { |
| |
| private RatisMetricRegistryImpl ratisMetricRegistry; |
| private RaftPeerId raftPeerId; |
| private MyFollowerInfo followerInfo; |
| |
| @BeforeEach |
| public void setup() { |
| RaftGroupId raftGroupId = RaftGroupId.randomId(); |
| raftPeerId = RaftPeerId.valueOf("TestId"); |
| RaftGroupMemberId raftGroupMemberId = RaftGroupMemberId.valueOf(raftPeerId, raftGroupId); |
| followerInfo = new MyFollowerInfo(100L); |
| LogAppenderMetrics logAppenderMetrics = new LogAppenderMetrics(raftGroupMemberId); |
| ratisMetricRegistry = (RatisMetricRegistryImpl) logAppenderMetrics.getRegistry(); |
| logAppenderMetrics.addFollowerGauges(raftPeerId, followerInfo::getNextIndex, followerInfo::getMatchIndex, |
| followerInfo::getLastRpcTime); |
| } |
| |
| @Test |
| public void testLogAppenderGauges() { |
| Gauge nextIndex = ratisMetricRegistry.getGauges((s, metric) -> |
| s.contains(String.format(FOLLOWER_NEXT_INDEX, raftPeerId.toString()))).values().iterator().next(); |
| Assertions.assertEquals(100L, nextIndex.getValue()); |
| Gauge matchIndex = ratisMetricRegistry.getGauges((s, metric) -> |
| s.contains(String.format(FOLLOWER_MATCH_INDEX, raftPeerId.toString()))).values().iterator().next(); |
| Assertions.assertEquals(0L, matchIndex.getValue()); |
| Gauge rpcTime = ratisMetricRegistry.getGauges((s, metric) -> |
| s.contains(String.format(FOLLOWER_RPC_RESP_TIME, raftPeerId.toString()))).values().iterator().next(); |
| Assertions.assertTrue(((Long) rpcTime.getValue()) > 0); |
| followerInfo.updateNextIndex(200L); |
| followerInfo.updateMatchIndex(100L); |
| followerInfo.updateLastRpcResponseTime(); |
| Assertions.assertEquals(200L, nextIndex.getValue()); |
| Assertions.assertEquals(100L, matchIndex.getValue()); |
| Assertions.assertNotNull(rpcTime.getValue()); |
| } |
| |
| private static class MyFollowerInfo { |
| private volatile long nextIndex; |
| private volatile long matchIndex; |
| private volatile Timestamp lastRpcTime = Timestamp.currentTime(); |
| |
| MyFollowerInfo(long nextIndex) { |
| this.nextIndex = nextIndex; |
| } |
| |
| long getNextIndex() { |
| return nextIndex; |
| } |
| |
| void updateNextIndex(long nextIndex) { |
| this.nextIndex = nextIndex; |
| } |
| |
| long getMatchIndex() { |
| return matchIndex; |
| } |
| |
| void updateMatchIndex(long matchIndex) { |
| this.matchIndex = matchIndex; |
| } |
| |
| Timestamp getLastRpcTime() { |
| return lastRpcTime; |
| } |
| |
| void updateLastRpcResponseTime() { |
| lastRpcTime = Timestamp.currentTime(); |
| } |
| } |
| } |
| |