Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Laboratory |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.store.primitives.resources.impl; |
| 17 | |
| 18 | import java.util.LinkedList; |
| 19 | import java.util.Queue; |
| 20 | import java.util.concurrent.CompletableFuture; |
| 21 | import java.util.function.Consumer; |
| 22 | |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 23 | import org.junit.AfterClass; |
| 24 | import org.junit.BeforeClass; |
Aaron Kruglikov | 43d843d | 2016-07-01 06:39:38 -0700 | [diff] [blame^] | 25 | import org.junit.Ignore; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 26 | import org.junit.Test; |
| 27 | |
| 28 | import static org.junit.Assert.*; |
| 29 | |
| 30 | import org.onosproject.cluster.Leadership; |
| 31 | import org.onosproject.cluster.NodeId; |
| 32 | import org.onosproject.event.Change; |
| 33 | |
| 34 | import io.atomix.Atomix; |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 35 | import io.atomix.AtomixClient; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 36 | import io.atomix.resource.ResourceType; |
| 37 | |
| 38 | /** |
| 39 | * Unit tests for {@link AtomixLeaderElector}. |
| 40 | */ |
Aaron Kruglikov | 43d843d | 2016-07-01 06:39:38 -0700 | [diff] [blame^] | 41 | @Ignore |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 42 | public class AtomixLeaderElectorTest extends AtomixTestBase { |
| 43 | |
| 44 | NodeId node1 = new NodeId("node1"); |
| 45 | NodeId node2 = new NodeId("node2"); |
| 46 | NodeId node3 = new NodeId("node3"); |
| 47 | |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 48 | @BeforeClass |
| 49 | public static void preTestSetup() throws Throwable { |
| 50 | createCopycatServers(3); |
| 51 | } |
| 52 | |
| 53 | @AfterClass |
| 54 | public static void postTestCleanup() throws Exception { |
| 55 | clearTests(); |
| 56 | } |
| 57 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 58 | @Override |
| 59 | protected ResourceType resourceType() { |
| 60 | return new ResourceType(AtomixLeaderElector.class); |
| 61 | } |
| 62 | |
| 63 | @Test |
| 64 | public void testRun() throws Throwable { |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 65 | leaderElectorRunTests(3); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | private void leaderElectorRunTests(int numServers) throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 69 | Atomix client1 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 70 | AtomixLeaderElector elector1 = client1.getResource("test-elector-run", |
| 71 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 72 | elector1.run("foo", node1).thenAccept(result -> { |
| 73 | assertEquals(node1, result.leaderNodeId()); |
| 74 | assertEquals(1, result.leader().term()); |
| 75 | assertEquals(1, result.candidates().size()); |
| 76 | assertEquals(node1, result.candidates().get(0)); |
| 77 | }).join(); |
| 78 | Atomix client2 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 79 | AtomixLeaderElector elector2 = client2.getResource("test-elector-run", |
| 80 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 81 | elector2.run("foo", node2).thenAccept(result -> { |
| 82 | assertEquals(node1, result.leaderNodeId()); |
| 83 | assertEquals(1, result.leader().term()); |
| 84 | assertEquals(2, result.candidates().size()); |
| 85 | assertEquals(node1, result.candidates().get(0)); |
| 86 | assertEquals(node2, result.candidates().get(1)); |
| 87 | }).join(); |
| 88 | } |
| 89 | |
| 90 | @Test |
| 91 | public void testWithdraw() throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 92 | leaderElectorWithdrawTests(3); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | private void leaderElectorWithdrawTests(int numServers) throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 96 | Atomix client1 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 97 | AtomixLeaderElector elector1 = client1.getResource("test-elector-withdraw", |
| 98 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 99 | elector1.run("foo", node1).join(); |
| 100 | Atomix client2 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 101 | AtomixLeaderElector elector2 = client2.getResource("test-elector-withdraw", |
| 102 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 103 | elector2.run("foo", node2).join(); |
| 104 | |
| 105 | LeaderEventListener listener1 = new LeaderEventListener(); |
| 106 | elector1.addChangeListener(listener1).join(); |
| 107 | |
| 108 | LeaderEventListener listener2 = new LeaderEventListener(); |
| 109 | elector2.addChangeListener(listener2).join(); |
| 110 | |
| 111 | elector1.withdraw("foo").join(); |
| 112 | |
| 113 | listener1.nextEvent().thenAccept(result -> { |
| 114 | assertEquals(node2, result.newValue().leaderNodeId()); |
| 115 | assertEquals(2, result.newValue().leader().term()); |
| 116 | assertEquals(1, result.newValue().candidates().size()); |
| 117 | assertEquals(node2, result.newValue().candidates().get(0)); |
| 118 | }).join(); |
| 119 | |
| 120 | listener2.nextEvent().thenAccept(result -> { |
| 121 | assertEquals(node2, result.newValue().leaderNodeId()); |
| 122 | assertEquals(2, result.newValue().leader().term()); |
| 123 | assertEquals(1, result.newValue().candidates().size()); |
| 124 | assertEquals(node2, result.newValue().candidates().get(0)); |
| 125 | }).join(); |
| 126 | } |
| 127 | |
| 128 | @Test |
| 129 | public void testAnoint() throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 130 | leaderElectorAnointTests(3); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | private void leaderElectorAnointTests(int numServers) throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 134 | Atomix client1 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 135 | AtomixLeaderElector elector1 = client1.getResource("test-elector-anoint", |
| 136 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 137 | Atomix client2 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 138 | AtomixLeaderElector elector2 = client2.getResource("test-elector-anoint", |
| 139 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 140 | Atomix client3 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 141 | AtomixLeaderElector elector3 = client3.getResource("test-elector-anoint", |
| 142 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 143 | elector1.run("foo", node1).join(); |
| 144 | elector2.run("foo", node2).join(); |
| 145 | |
| 146 | LeaderEventListener listener1 = new LeaderEventListener(); |
| 147 | elector1.addChangeListener(listener1).join(); |
| 148 | LeaderEventListener listener2 = new LeaderEventListener(); |
| 149 | elector2.addChangeListener(listener2); |
| 150 | LeaderEventListener listener3 = new LeaderEventListener(); |
| 151 | elector3.addChangeListener(listener3).join(); |
| 152 | |
| 153 | elector3.anoint("foo", node3).thenAccept(result -> { |
| 154 | assertFalse(result); |
| 155 | }).join(); |
| 156 | assertFalse(listener1.hasEvent()); |
| 157 | assertFalse(listener2.hasEvent()); |
| 158 | assertFalse(listener3.hasEvent()); |
| 159 | |
| 160 | elector3.anoint("foo", node2).thenAccept(result -> { |
| 161 | assertTrue(result); |
| 162 | }).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 163 | |
| 164 | listener1.nextEvent().thenAccept(result -> { |
| 165 | assertEquals(node2, result.newValue().leaderNodeId()); |
| 166 | assertEquals(2, result.newValue().candidates().size()); |
| 167 | assertEquals(node1, result.newValue().candidates().get(0)); |
| 168 | assertEquals(node2, result.newValue().candidates().get(1)); |
| 169 | }).join(); |
| 170 | listener2.nextEvent().thenAccept(result -> { |
| 171 | assertEquals(node2, result.newValue().leaderNodeId()); |
| 172 | assertEquals(2, result.newValue().candidates().size()); |
| 173 | assertEquals(node1, result.newValue().candidates().get(0)); |
| 174 | assertEquals(node2, result.newValue().candidates().get(1)); |
| 175 | }).join(); |
| 176 | listener3.nextEvent().thenAccept(result -> { |
| 177 | assertEquals(node2, result.newValue().leaderNodeId()); |
| 178 | assertEquals(2, result.newValue().candidates().size()); |
| 179 | assertEquals(node1, result.newValue().candidates().get(0)); |
| 180 | assertEquals(node2, result.newValue().candidates().get(1)); |
| 181 | }).join(); |
| 182 | } |
| 183 | |
| 184 | @Test |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 185 | public void testPromote() throws Throwable { |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 186 | leaderElectorPromoteTests(3); |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | private void leaderElectorPromoteTests(int numServers) throws Throwable { |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 190 | AtomixClient client1 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 191 | AtomixLeaderElector elector1 = client1.getResource("test-elector-promote", |
| 192 | AtomixLeaderElector.class).join(); |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 193 | AtomixClient client2 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 194 | AtomixLeaderElector elector2 = client2.getResource("test-elector-promote", |
| 195 | AtomixLeaderElector.class).join(); |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 196 | AtomixClient client3 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 197 | AtomixLeaderElector elector3 = client3.getResource("test-elector-promote", |
| 198 | AtomixLeaderElector.class).join(); |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 199 | elector1.run("foo", node1).join(); |
| 200 | elector2.run("foo", node2).join(); |
| 201 | |
| 202 | LeaderEventListener listener1 = new LeaderEventListener(); |
| 203 | elector1.addChangeListener(listener1).join(); |
| 204 | LeaderEventListener listener2 = new LeaderEventListener(); |
| 205 | elector2.addChangeListener(listener2).join(); |
| 206 | LeaderEventListener listener3 = new LeaderEventListener(); |
| 207 | elector3.addChangeListener(listener3).join(); |
| 208 | |
| 209 | elector3.promote("foo", node3).thenAccept(result -> { |
| 210 | assertFalse(result); |
| 211 | }).join(); |
| 212 | |
| 213 | assertFalse(listener1.hasEvent()); |
| 214 | assertFalse(listener2.hasEvent()); |
| 215 | assertFalse(listener3.hasEvent()); |
| 216 | |
| 217 | elector3.run("foo", node3).join(); |
| 218 | |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 219 | listener1.nextEvent().thenAccept(result -> { |
| 220 | assertEquals(node3, result.newValue().candidates().get(2)); |
| 221 | }).join(); |
| 222 | listener2.nextEvent().thenAccept(result -> { |
| 223 | assertEquals(node3, result.newValue().candidates().get(2)); |
| 224 | }).join(); |
| 225 | listener3.nextEvent().thenAccept(result -> { |
| 226 | assertEquals(node3, result.newValue().candidates().get(2)); |
| 227 | }).join(); |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 228 | |
| 229 | elector3.promote("foo", node3).thenAccept(result -> { |
| 230 | assertTrue(result); |
| 231 | }).join(); |
| 232 | |
| 233 | listener1.nextEvent().thenAccept(result -> { |
| 234 | assertEquals(node3, result.newValue().candidates().get(0)); |
| 235 | }).join(); |
| 236 | listener2.nextEvent().thenAccept(result -> { |
| 237 | assertEquals(node3, result.newValue().candidates().get(0)); |
| 238 | }).join(); |
| 239 | listener3.nextEvent().thenAccept(result -> { |
| 240 | assertEquals(node3, result.newValue().candidates().get(0)); |
| 241 | }).join(); |
| 242 | } |
| 243 | |
| 244 | @Test |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 245 | public void testLeaderSessionClose() throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 246 | leaderElectorLeaderSessionCloseTests(3); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | private void leaderElectorLeaderSessionCloseTests(int numServers) throws Throwable { |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 250 | AtomixClient client1 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 251 | AtomixLeaderElector elector1 = client1.getResource("test-elector-leader-session-close", |
| 252 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 253 | elector1.run("foo", node1).join(); |
| 254 | Atomix client2 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 255 | AtomixLeaderElector elector2 = client2.getResource("test-elector-leader-session-close", |
| 256 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 257 | LeaderEventListener listener = new LeaderEventListener(); |
| 258 | elector2.run("foo", node2).join(); |
| 259 | elector2.addChangeListener(listener).join(); |
| 260 | client1.close(); |
| 261 | listener.nextEvent().thenAccept(result -> { |
| 262 | assertEquals(node2, result.newValue().leaderNodeId()); |
| 263 | assertEquals(1, result.newValue().candidates().size()); |
| 264 | assertEquals(node2, result.newValue().candidates().get(0)); |
| 265 | }).join(); |
| 266 | } |
| 267 | |
| 268 | @Test |
| 269 | public void testNonLeaderSessionClose() throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 270 | leaderElectorNonLeaderSessionCloseTests(3); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | private void leaderElectorNonLeaderSessionCloseTests(int numServers) throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 274 | Atomix client1 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 275 | AtomixLeaderElector elector1 = client1.getResource("test-elector-non-leader-session-close", |
| 276 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 277 | elector1.run("foo", node1).join(); |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 278 | AtomixClient client2 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 279 | AtomixLeaderElector elector2 = client2.getResource("test-elector-non-leader-session-close", |
| 280 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 281 | LeaderEventListener listener = new LeaderEventListener(); |
| 282 | elector2.run("foo", node2).join(); |
| 283 | elector1.addChangeListener(listener).join(); |
| 284 | client2.close().join(); |
| 285 | listener.nextEvent().thenAccept(result -> { |
| 286 | assertEquals(node1, result.newValue().leaderNodeId()); |
| 287 | assertEquals(1, result.newValue().candidates().size()); |
| 288 | assertEquals(node1, result.newValue().candidates().get(0)); |
| 289 | }).join(); |
| 290 | } |
| 291 | |
| 292 | @Test |
| 293 | public void testQueries() throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 294 | leaderElectorQueryTests(3); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | private void leaderElectorQueryTests(int numServers) throws Throwable { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 298 | Atomix client1 = createAtomixClient(); |
| 299 | Atomix client2 = createAtomixClient(); |
Aaron Kruglikov | b5a41e5 | 2016-06-23 15:37:41 -0700 | [diff] [blame] | 300 | AtomixLeaderElector elector1 = client1.getResource("test-elector-query", |
| 301 | AtomixLeaderElector.class).join(); |
| 302 | AtomixLeaderElector elector2 = client2.getResource("test-elector-query", |
| 303 | AtomixLeaderElector.class).join(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 304 | elector1.run("foo", node1).join(); |
| 305 | elector2.run("foo", node2).join(); |
| 306 | elector2.run("bar", node2).join(); |
| 307 | elector1.getElectedTopics(node1).thenAccept(result -> { |
| 308 | assertEquals(1, result.size()); |
| 309 | assertTrue(result.contains("foo")); |
| 310 | }).join(); |
| 311 | elector2.getElectedTopics(node1).thenAccept(result -> { |
| 312 | assertEquals(1, result.size()); |
| 313 | assertTrue(result.contains("foo")); |
| 314 | }).join(); |
| 315 | elector1.getLeadership("foo").thenAccept(result -> { |
| 316 | assertEquals(node1, result.leaderNodeId()); |
| 317 | assertEquals(node1, result.candidates().get(0)); |
| 318 | assertEquals(node2, result.candidates().get(1)); |
| 319 | }).join(); |
| 320 | elector2.getLeadership("foo").thenAccept(result -> { |
| 321 | assertEquals(node1, result.leaderNodeId()); |
| 322 | assertEquals(node1, result.candidates().get(0)); |
| 323 | assertEquals(node2, result.candidates().get(1)); |
| 324 | }).join(); |
| 325 | elector1.getLeadership("bar").thenAccept(result -> { |
| 326 | assertEquals(node2, result.leaderNodeId()); |
| 327 | assertEquals(node2, result.candidates().get(0)); |
| 328 | }).join(); |
| 329 | elector2.getLeadership("bar").thenAccept(result -> { |
| 330 | assertEquals(node2, result.leaderNodeId()); |
| 331 | assertEquals(node2, result.candidates().get(0)); |
| 332 | }).join(); |
| 333 | elector1.getLeaderships().thenAccept(result -> { |
| 334 | assertEquals(2, result.size()); |
| 335 | Leadership fooLeadership = result.get("foo"); |
| 336 | assertEquals(node1, fooLeadership.leaderNodeId()); |
| 337 | assertEquals(node1, fooLeadership.candidates().get(0)); |
| 338 | assertEquals(node2, fooLeadership.candidates().get(1)); |
| 339 | Leadership barLeadership = result.get("bar"); |
| 340 | assertEquals(node2, barLeadership.leaderNodeId()); |
| 341 | assertEquals(node2, barLeadership.candidates().get(0)); |
| 342 | }).join(); |
| 343 | elector2.getLeaderships().thenAccept(result -> { |
| 344 | assertEquals(2, result.size()); |
| 345 | Leadership fooLeadership = result.get("foo"); |
| 346 | assertEquals(node1, fooLeadership.leaderNodeId()); |
| 347 | assertEquals(node1, fooLeadership.candidates().get(0)); |
| 348 | assertEquals(node2, fooLeadership.candidates().get(1)); |
| 349 | Leadership barLeadership = result.get("bar"); |
| 350 | assertEquals(node2, barLeadership.leaderNodeId()); |
| 351 | assertEquals(node2, barLeadership.candidates().get(0)); |
| 352 | }).join(); |
| 353 | } |
| 354 | |
| 355 | private static class LeaderEventListener implements Consumer<Change<Leadership>> { |
| 356 | Queue<Change<Leadership>> eventQueue = new LinkedList<>(); |
| 357 | CompletableFuture<Change<Leadership>> pendingFuture; |
| 358 | |
| 359 | @Override |
| 360 | public void accept(Change<Leadership> change) { |
| 361 | synchronized (this) { |
| 362 | if (pendingFuture != null) { |
| 363 | pendingFuture.complete(change); |
| 364 | pendingFuture = null; |
| 365 | } else { |
| 366 | eventQueue.add(change); |
| 367 | } |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | public boolean hasEvent() { |
| 372 | return !eventQueue.isEmpty(); |
| 373 | } |
| 374 | |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 375 | public void clearEvents() { |
| 376 | eventQueue.clear(); |
| 377 | } |
| 378 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 379 | public CompletableFuture<Change<Leadership>> nextEvent() { |
| 380 | synchronized (this) { |
| 381 | if (eventQueue.isEmpty()) { |
| 382 | if (pendingFuture == null) { |
| 383 | pendingFuture = new CompletableFuture<>(); |
| 384 | } |
| 385 | return pendingFuture; |
| 386 | } else { |
| 387 | return CompletableFuture.completedFuture(eventQueue.poll()); |
| 388 | } |
| 389 | } |
| 390 | } |
| 391 | } |
| 392 | } |