| /* |
| * 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 org.apache.ratis.BaseTest; |
| import org.apache.ratis.proto.RaftProtos; |
| import org.apache.ratis.protocol.RaftPeer; |
| import org.apache.ratis.protocol.RaftPeerId; |
| import org.apache.ratis.server.RaftConfiguration; |
| import org.junit.jupiter.api.Test; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.stream.Collectors; |
| |
| import static org.junit.jupiter.api.Assertions.assertFalse; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| |
| public class TestRaftConfiguration extends BaseTest { |
| @Test |
| public void testIsHighestPriority() { |
| Integer node1 = 0; |
| Integer node2 = 1; |
| Integer node3 = 2; |
| PeerConfiguration peerConfig = new PeerConfiguration(raftPeersWithPriority(node1, node2, node3)); |
| RaftConfiguration config = RaftConfigurationImpl.newBuilder().setConf(peerConfig).build(); |
| RaftPeer[] allRaftPeers = peerConfig.getPeers(RaftProtos.RaftPeerRole.FOLLOWER).toArray(new RaftPeer[peerConfig.getPeers( |
| RaftProtos.RaftPeerRole.FOLLOWER).size()]); |
| |
| // First member should not have highest priority |
| assertFalse(RaftServerTestUtil.isHighestPriority(config, |
| allRaftPeers[0].getId())); |
| |
| // Last member should have highest priority |
| assertTrue(RaftServerTestUtil.isHighestPriority(config, |
| allRaftPeers[allRaftPeers.length - 1].getId())); |
| |
| // Should return false for non existent peer id |
| assertFalse(RaftServerTestUtil.isHighestPriority(config, RaftPeerId.valueOf("123456789"))); |
| } |
| |
| private Collection<RaftPeer> raftPeersWithPriority(Integer... voters) { |
| return Arrays.stream(voters) |
| .map(id -> RaftPeer.newBuilder().setPriority(id).setId(id.toString()).build()) |
| .collect(Collectors.toSet()); |
| } |
| |
| @Test |
| public void testSingleMode() { |
| RaftConfigurationImpl config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(1))) |
| .build(); |
| assertTrue(config.isSingleMode(RaftPeerId.valueOf("1")), "Peer is in single mode."); |
| |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(0, 1))) |
| .setOldConf(new PeerConfiguration(raftPeersWithPriority(0))) |
| .build(); |
| assertTrue(config.isSingleMode(RaftPeerId.valueOf("0")), "Peer is in single mode."); |
| assertFalse(config.isSingleMode(RaftPeerId.valueOf("1")), "Peer is a new peer"); |
| |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(0, 1))) |
| .build(); |
| assertFalse(config.isSingleMode(RaftPeerId.valueOf("0")), "Peer is in ha mode."); |
| assertFalse(config.isSingleMode(RaftPeerId.valueOf("1")), "Peer is in ha mode."); |
| |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(0, 1))) |
| .setOldConf(new PeerConfiguration(raftPeersWithPriority(2, 3))) |
| .build(); |
| assertFalse(config.isSingleMode(RaftPeerId.valueOf("0")), "Peer is in ha mode."); |
| assertFalse(config.isSingleMode(RaftPeerId.valueOf("1")), "Peer is in ha mode."); |
| assertFalse(config.isSingleMode(RaftPeerId.valueOf("3")), "Peer is in ha mode."); |
| assertFalse(config.isSingleMode(RaftPeerId.valueOf("4")), "Peer is in ha mode."); |
| } |
| |
| @Test |
| public void testChangeMajority() { |
| // Case 1: {1} --> {1, 2}. |
| RaftConfigurationImpl config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(1))) |
| .build(); |
| assertFalse(config.changeMajority(raftPeersWithPriority(1, 2)), |
| "Change from single mode to ha mode is not considered as changing majority."); |
| |
| // Case 2: {1} --> {2}. |
| assertTrue(config.changeMajority(raftPeersWithPriority(2))); |
| |
| // Case 3: {1, 2, 3} --> {1, 2, 4, 5}. |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(1, 2, 3))) |
| .build(); |
| assertTrue(config.changeMajority(raftPeersWithPriority(1, 2, 4, 5))); |
| |
| // Case 4: {1, 2, 3} --> {1, 4, 5}. |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(1, 2, 3))) |
| .build(); |
| assertTrue(config.changeMajority(raftPeersWithPriority(1, 4, 5))); |
| |
| // Case 5: {1, 2, 3} --> {1, 2, 3, 4, 5}. |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(1, 2, 3))) |
| .build(); |
| assertFalse(config.changeMajority(raftPeersWithPriority(1, 2, 3, 4, 5))); |
| |
| // Case 6: {1, 2, 3, 4, 5} --> {1, 2}. |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(1, 2, 3, 4, 5))) |
| .build(); |
| assertFalse(config.changeMajority(raftPeersWithPriority(1, 2))); |
| |
| // Case 7: {1, 2, 3, 4, 5} --> {1, 2, 3}. |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(1, 2, 3, 4, 5))) |
| .build(); |
| assertFalse(config.changeMajority(raftPeersWithPriority(1, 2, 3))); |
| |
| // Case 8: {1, 2, 3} --> {1, 2, 3, 4}. |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(1, 2, 3))) |
| .build(); |
| assertFalse(config.changeMajority(raftPeersWithPriority(1, 2, 3, 4))); |
| |
| // Case 9: {1, 2, 3, 4, 5} --> {1, 2, 3, 4, 6, 7}. |
| config = RaftConfigurationImpl.newBuilder() |
| .setConf(new PeerConfiguration(raftPeersWithPriority(1, 2, 3, 4, 5))) |
| .build(); |
| assertFalse(config.changeMajority(raftPeersWithPriority(1, 2, 3, 4, 6, 7))); |
| } |
| } |