2 * Copyright 2015 Open Networking Laboratory
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 package org.onosproject.store.ecmap;
18 import java.util.ArrayList;
19 import java.util.Collection;
20 import java.util.HashMap;
21 import java.util.HashSet;
22 import java.util.List;
24 import java.util.Objects;
25 import java.util.Optional;
27 import java.util.concurrent.CompletableFuture;
28 import java.util.concurrent.CountDownLatch;
29 import java.util.concurrent.Executor;
30 import java.util.concurrent.TimeUnit;
31 import java.util.concurrent.atomic.AtomicLong;
32 import java.util.function.Consumer;
33 import java.util.function.Function;
35 import org.junit.After;
36 import org.junit.Before;
37 import org.junit.Test;
38 import org.onlab.packet.IpAddress;
39 import org.onlab.util.KryoNamespace;
40 import org.onosproject.cluster.ClusterService;
41 import org.onosproject.cluster.ControllerNode;
42 import org.onosproject.cluster.DefaultControllerNode;
43 import org.onosproject.cluster.NodeId;
44 import org.onosproject.event.AbstractEvent;
45 import org.onosproject.store.Timestamp;
46 import org.onosproject.store.cluster.messaging.ClusterCommunicationService;
47 import org.onosproject.store.cluster.messaging.ClusterCommunicationServiceAdapter;
48 import org.onosproject.store.cluster.messaging.MessageSubject;
49 import org.onosproject.store.impl.LogicalTimestamp;
50 import org.onosproject.store.serializers.KryoNamespaces;
51 import org.onosproject.store.serializers.KryoSerializer;
52 import org.onosproject.store.service.EventuallyConsistentMap;
53 import org.onosproject.store.service.EventuallyConsistentMapEvent;
54 import org.onosproject.store.service.EventuallyConsistentMapListener;
55 import org.onosproject.store.service.WallClockTimestamp;
57 import com.google.common.collect.ComparisonChain;
58 import com.google.common.collect.ImmutableList;
59 import com.google.common.collect.ImmutableSet;
60 import com.google.common.util.concurrent.MoreExecutors;
62 import static com.google.common.base.Preconditions.checkArgument;
63 import static junit.framework.TestCase.assertFalse;
64 import static org.easymock.EasyMock.anyObject;
65 import static org.easymock.EasyMock.createMock;
66 import static org.easymock.EasyMock.eq;
67 import static org.easymock.EasyMock.expect;
68 import static org.easymock.EasyMock.expectLastCall;
69 import static org.easymock.EasyMock.replay;
70 import static org.easymock.EasyMock.reset;
71 import static org.easymock.EasyMock.verify;
72 import static org.junit.Assert.assertEquals;
73 import static org.junit.Assert.assertNull;
74 import static org.junit.Assert.assertTrue;
75 import static org.junit.Assert.fail;
78 * Unit tests for EventuallyConsistentMapImpl.
80 public class EventuallyConsistentMapImplTest {
82 private EventuallyConsistentMap<String, String> ecMap;
84 private ClusterService clusterService;
85 private ClusterCommunicationService clusterCommunicator;
86 private SequentialClockService<String, String> clockService;
88 private static final String MAP_NAME = "test";
89 private static final MessageSubject UPDATE_MESSAGE_SUBJECT
90 = new MessageSubject("ecm-" + MAP_NAME + "-update");
91 private static final MessageSubject ANTI_ENTROPY_MESSAGE_SUBJECT
92 = new MessageSubject("ecm-" + MAP_NAME + "-anti-entropy");
94 private static final String KEY1 = "one";
95 private static final String KEY2 = "two";
96 private static final String VALUE1 = "oneValue";
97 private static final String VALUE2 = "twoValue";
99 private final ControllerNode self =
100 new DefaultControllerNode(new NodeId("local"), IpAddress.valueOf(1));
102 private Consumer<Collection<UpdateEntry<String, String>>> updateHandler;
103 private Consumer<AntiEntropyAdvertisement<String>> antiEntropyHandler;
106 * Serialization is a bit tricky here. We need to serialize in the tests
107 * to set the expectations, which will use this serializer here, but the
108 * EventuallyConsistentMap will use its own internal serializer. This means
109 * this serializer must be set up exactly the same as map's internal
112 private static final KryoSerializer SERIALIZER = new KryoSerializer() {
114 protected void setupKryoPool() {
115 serializerPool = KryoNamespace.newBuilder()
116 // Classes we give to the map
117 .register(KryoNamespaces.API)
118 .register(TestTimestamp.class)
119 // Below is the classes that the map internally registers
120 .register(LogicalTimestamp.class)
121 .register(WallClockTimestamp.class)
122 .register(ArrayList.class)
123 .register(AntiEntropyAdvertisement.class)
124 .register(HashMap.class)
125 .register(Optional.class)
131 public void setUp() throws Exception {
132 clusterService = createMock(ClusterService.class);
133 expect(clusterService.getLocalNode()).andReturn(self).anyTimes();
134 expect(clusterService.getNodes()).andReturn(ImmutableSet.of(self)).anyTimes();
135 replay(clusterService);
137 clusterCommunicator = createMock(ClusterCommunicationService.class);
139 // Add expectation for adding cluster message subscribers which
140 // delegate to our ClusterCommunicationService implementation. This
141 // allows us to get a reference to the map's internal cluster message
142 // handlers so we can induce events coming in from a peer.
143 clusterCommunicator.<String>addSubscriber(anyObject(MessageSubject.class),
144 anyObject(Function.class), anyObject(Consumer.class), anyObject(Executor.class));
145 expectLastCall().andDelegateTo(new TestClusterCommunicationService()).times(2);
147 replay(clusterCommunicator);
149 clockService = new SequentialClockService<>();
151 KryoNamespace.Builder serializer = KryoNamespace.newBuilder()
152 .register(KryoNamespaces.API)
153 .register(TestTimestamp.class);
155 ecMap = new EventuallyConsistentMapBuilderImpl<String, String>(
156 clusterService, clusterCommunicator)
158 .withSerializer(serializer)
159 .withTimestampProvider((k, v) -> clockService.getTimestamp(k, v))
160 .withCommunicationExecutor(MoreExecutors.newDirectExecutorService())
163 // Reset ready for tests to add their own expectations
164 reset(clusterCommunicator);
168 public void tearDown() {
169 reset(clusterCommunicator);
173 @SuppressWarnings("unchecked")
174 private EventuallyConsistentMapListener<String, String> getListener() {
175 return createMock(EventuallyConsistentMapListener.class);
179 public void testSize() throws Exception {
180 expectPeerMessage(clusterCommunicator);
182 assertEquals(0, ecMap.size());
183 ecMap.put(KEY1, VALUE1);
184 assertEquals(1, ecMap.size());
185 ecMap.put(KEY1, VALUE2);
186 assertEquals(1, ecMap.size());
187 ecMap.put(KEY2, VALUE2);
188 assertEquals(2, ecMap.size());
189 for (int i = 0; i < 10; i++) {
190 ecMap.put("" + i, "" + i);
192 assertEquals(12, ecMap.size());
194 assertEquals(11, ecMap.size());
196 assertEquals(11, ecMap.size());
200 public void testIsEmpty() throws Exception {
201 expectPeerMessage(clusterCommunicator);
203 assertTrue(ecMap.isEmpty());
204 ecMap.put(KEY1, VALUE1);
205 assertFalse(ecMap.isEmpty());
207 assertTrue(ecMap.isEmpty());
211 public void testContainsKey() throws Exception {
212 expectPeerMessage(clusterCommunicator);
214 assertFalse(ecMap.containsKey(KEY1));
215 ecMap.put(KEY1, VALUE1);
216 assertTrue(ecMap.containsKey(KEY1));
217 assertFalse(ecMap.containsKey(KEY2));
219 assertFalse(ecMap.containsKey(KEY1));
223 public void testContainsValue() throws Exception {
224 expectPeerMessage(clusterCommunicator);
226 assertFalse(ecMap.containsValue(VALUE1));
227 ecMap.put(KEY1, VALUE1);
228 assertTrue(ecMap.containsValue(VALUE1));
229 assertFalse(ecMap.containsValue(VALUE2));
230 ecMap.put(KEY1, VALUE2);
231 assertFalse(ecMap.containsValue(VALUE1));
232 assertTrue(ecMap.containsValue(VALUE2));
234 assertFalse(ecMap.containsValue(VALUE2));
238 public void testGet() throws Exception {
239 expectPeerMessage(clusterCommunicator);
241 CountDownLatch latch;
244 assertNull(ecMap.get(KEY1));
245 ecMap.put(KEY1, VALUE1);
246 assertEquals(VALUE1, ecMap.get(KEY1));
249 List<UpdateEntry<String, String>> message
250 = ImmutableList.of(generatePutMessage(KEY2, VALUE2, clockService.getTimestamp(KEY2, VALUE2)));
252 // Create a latch so we know when the put operation has finished
253 latch = new CountDownLatch(1);
254 ecMap.addListener(new TestListener(latch));
256 assertNull(ecMap.get(KEY2));
257 updateHandler.accept(message);
258 assertTrue("External listener never got notified of internal event",
259 latch.await(100, TimeUnit.MILLISECONDS));
260 assertEquals(VALUE2, ecMap.get(KEY2));
264 assertNull(ecMap.get(KEY2));
267 message = ImmutableList.of(generateRemoveMessage(KEY1, clockService.getTimestamp(KEY1, VALUE1)));
269 // Create a latch so we know when the remove operation has finished
270 latch = new CountDownLatch(1);
271 ecMap.addListener(new TestListener(latch));
273 updateHandler.accept(message);
274 assertTrue("External listener never got notified of internal event",
275 latch.await(100, TimeUnit.MILLISECONDS));
276 assertNull(ecMap.get(KEY1));
280 public void testPut() throws Exception {
281 // Set up expectations of external events to be sent to listeners during
282 // the test. These don't use timestamps so we can set them all up at once.
283 EventuallyConsistentMapListener<String, String> listener
285 listener.event(new EventuallyConsistentMapEvent<>(
286 MAP_NAME, EventuallyConsistentMapEvent.Type.PUT, KEY1, VALUE1));
287 listener.event(new EventuallyConsistentMapEvent<>(
288 MAP_NAME, EventuallyConsistentMapEvent.Type.PUT, KEY1, VALUE2));
291 ecMap.addListener(listener);
293 // Set up expected internal message to be broadcast to peers on first put
294 expectSpecificMulticastMessage(generatePutMessage(KEY1, VALUE1, clockService
295 .peekAtNextTimestamp()), UPDATE_MESSAGE_SUBJECT, clusterCommunicator);
298 assertNull(ecMap.get(KEY1));
299 ecMap.put(KEY1, VALUE1);
300 assertEquals(VALUE1, ecMap.get(KEY1));
302 verify(clusterCommunicator);
304 // Set up expected internal message to be broadcast to peers on second put
305 expectSpecificMulticastMessage(generatePutMessage(
306 KEY1, VALUE2, clockService.peekAtNextTimestamp()), UPDATE_MESSAGE_SUBJECT, clusterCommunicator);
308 // Update same key to a new value
309 ecMap.put(KEY1, VALUE2);
310 assertEquals(VALUE2, ecMap.get(KEY1));
312 verify(clusterCommunicator);
314 // Do a put with a older timestamp than the value already there.
315 // The map data should not be changed and no notifications should be sent.
316 reset(clusterCommunicator);
317 replay(clusterCommunicator);
319 clockService.turnBackTime();
320 ecMap.put(KEY1, VALUE1);
321 // Value should not have changed.
322 assertEquals(VALUE2, ecMap.get(KEY1));
324 verify(clusterCommunicator);
326 // Check that our listener received the correct events during the test
331 public void testRemove() throws Exception {
332 // Set up expectations of external events to be sent to listeners during
333 // the test. These don't use timestamps so we can set them all up at once.
334 EventuallyConsistentMapListener<String, String> listener
336 listener.event(new EventuallyConsistentMapEvent<>(
337 MAP_NAME, EventuallyConsistentMapEvent.Type.REMOVE, KEY1, VALUE1));
338 listener.event(new EventuallyConsistentMapEvent<>(
339 MAP_NAME, EventuallyConsistentMapEvent.Type.PUT, KEY1, VALUE1));
340 listener.event(new EventuallyConsistentMapEvent<>(
341 MAP_NAME, EventuallyConsistentMapEvent.Type.PUT, KEY2, VALUE2));
344 ecMap.addListener(listener);
346 // Put in an initial value
347 expectPeerMessage(clusterCommunicator);
348 ecMap.put(KEY1, VALUE1);
349 assertEquals(VALUE1, ecMap.get(KEY1));
351 // Remove the value and check the correct internal cluster messages
353 expectSpecificMulticastMessage(generateRemoveMessage(KEY1, clockService.peekAtNextTimestamp()),
354 UPDATE_MESSAGE_SUBJECT, clusterCommunicator);
357 assertNull(ecMap.get(KEY1));
359 verify(clusterCommunicator);
361 // Remove the same value again. Even though the value is no longer in
362 // the map, we expect that the tombstone is updated and another remove
363 // event is sent to the cluster and external listeners.
364 expectSpecificMulticastMessage(generateRemoveMessage(KEY1, clockService.peekAtNextTimestamp()),
365 UPDATE_MESSAGE_SUBJECT, clusterCommunicator);
368 assertNull(ecMap.get(KEY1));
370 verify(clusterCommunicator);
373 // Put in a new value for us to try and remove
374 expectPeerMessage(clusterCommunicator);
376 ecMap.put(KEY2, VALUE2);
378 clockService.turnBackTime();
380 // Remove should have no effect, since it has an older timestamp than
381 // the put. Expect no notifications to be sent out
382 reset(clusterCommunicator);
383 replay(clusterCommunicator);
387 verify(clusterCommunicator);
389 // Check that our listener received the correct events during the test
394 public void testCompute() throws Exception {
395 // Set up expectations of external events to be sent to listeners during
396 // the test. These don't use timestamps so we can set them all up at once.
397 EventuallyConsistentMapListener<String, String> listener
399 listener.event(new EventuallyConsistentMapEvent<>(
400 MAP_NAME, EventuallyConsistentMapEvent.Type.PUT, KEY1, VALUE1));
401 listener.event(new EventuallyConsistentMapEvent<>(
402 MAP_NAME, EventuallyConsistentMapEvent.Type.REMOVE, KEY1, VALUE1));
403 listener.event(new EventuallyConsistentMapEvent<>(
404 MAP_NAME, EventuallyConsistentMapEvent.Type.PUT, KEY2, VALUE2));
407 ecMap.addListener(listener);
409 // Put in an initial value
410 expectPeerMessage(clusterCommunicator);
411 ecMap.compute(KEY1, (k, v) -> VALUE1);
412 assertEquals(VALUE1, ecMap.get(KEY1));
414 // Remove the value and check the correct internal cluster messages
416 expectSpecificMulticastMessage(generateRemoveMessage(KEY1, clockService.peekAtNextTimestamp()),
417 UPDATE_MESSAGE_SUBJECT, clusterCommunicator);
419 ecMap.compute(KEY1, (k, v) -> null);
420 assertNull(ecMap.get(KEY1));
422 verify(clusterCommunicator);
424 // Remove the same value again. Even though the value is no longer in
425 // the map, we expect that the tombstone is updated and another remove
426 // event is sent to the cluster and external listeners.
427 expectSpecificMulticastMessage(generateRemoveMessage(KEY1, clockService.peekAtNextTimestamp()),
428 UPDATE_MESSAGE_SUBJECT, clusterCommunicator);
430 ecMap.compute(KEY1, (k, v) -> null);
431 assertNull(ecMap.get(KEY1));
433 verify(clusterCommunicator);
435 // Put in a new value for us to try and remove
436 expectPeerMessage(clusterCommunicator);
438 ecMap.compute(KEY2, (k, v) -> VALUE2);
440 clockService.turnBackTime();
442 // Remove should have no effect, since it has an older timestamp than
443 // the put. Expect no notifications to be sent out
444 reset(clusterCommunicator);
445 replay(clusterCommunicator);
447 ecMap.compute(KEY2, (k, v) -> null);
449 verify(clusterCommunicator);
451 // Check that our listener received the correct events during the test
456 public void testPutAll() throws Exception {
457 // putAll() with an empty map is a no-op - no messages will be sent
458 reset(clusterCommunicator);
459 replay(clusterCommunicator);
461 ecMap.putAll(new HashMap<>());
463 verify(clusterCommunicator);
465 // Set up the listener with our expected events
466 EventuallyConsistentMapListener<String, String> listener
468 listener.event(new EventuallyConsistentMapEvent<>(
469 MAP_NAME, EventuallyConsistentMapEvent.Type.PUT, KEY1, VALUE1));
470 listener.event(new EventuallyConsistentMapEvent<>(
471 MAP_NAME, EventuallyConsistentMapEvent.Type.PUT, KEY2, VALUE2));
474 ecMap.addListener(listener);
476 // Expect a multi-update inter-instance message
477 expectSpecificBroadcastMessage(generatePutMessage(KEY1, VALUE1, KEY2, VALUE2), UPDATE_MESSAGE_SUBJECT,
478 clusterCommunicator);
480 Map<String, String> putAllValues = new HashMap<>();
481 putAllValues.put(KEY1, VALUE1);
482 putAllValues.put(KEY2, VALUE2);
484 // Put the values in the map
485 ecMap.putAll(putAllValues);
487 // Check the correct messages and events were sent
488 verify(clusterCommunicator);
493 public void testClear() throws Exception {
494 EventuallyConsistentMapListener<String, String> listener
496 listener.event(new EventuallyConsistentMapEvent<>(
497 MAP_NAME, EventuallyConsistentMapEvent.Type.REMOVE, KEY1, VALUE1));
498 listener.event(new EventuallyConsistentMapEvent<>(
499 MAP_NAME, EventuallyConsistentMapEvent.Type.REMOVE, KEY2, VALUE2));
502 // clear() on an empty map is a no-op - no messages will be sent
503 reset(clusterCommunicator);
504 replay(clusterCommunicator);
506 assertTrue(ecMap.isEmpty());
508 verify(clusterCommunicator);
510 // Put some items in the map
511 expectPeerMessage(clusterCommunicator);
512 ecMap.put(KEY1, VALUE1);
513 ecMap.put(KEY2, VALUE2);
515 ecMap.addListener(listener);
516 expectSpecificBroadcastMessage(generateRemoveMessage(KEY1, KEY2), UPDATE_MESSAGE_SUBJECT, clusterCommunicator);
520 verify(clusterCommunicator);
525 public void testKeySet() throws Exception {
526 expectPeerMessage(clusterCommunicator);
528 assertTrue(ecMap.keySet().isEmpty());
530 // Generate some keys
531 Set<String> keys = new HashSet<>();
532 for (int i = 1; i <= 10; i++) {
536 // Put each key in the map
537 keys.forEach(k -> ecMap.put(k, "value" + k));
539 // Check keySet() returns the correct value
540 assertEquals(keys, ecMap.keySet());
542 // Update the value for one of the keys
543 ecMap.put(keys.iterator().next(), "new-value");
545 // Check the key set is still the same
546 assertEquals(keys, ecMap.keySet());
549 String removeKey = keys.iterator().next();
550 keys.remove(removeKey);
551 ecMap.remove(removeKey);
553 // Check the key set is still correct
554 assertEquals(keys, ecMap.keySet());
558 public void testValues() throws Exception {
559 expectPeerMessage(clusterCommunicator);
561 assertTrue(ecMap.values().isEmpty());
563 // Generate some values
564 Map<String, String> expectedValues = new HashMap<>();
565 for (int i = 1; i <= 10; i++) {
566 expectedValues.put("" + i, "value" + i);
569 // Add them into the map
570 expectedValues.entrySet().forEach(e -> ecMap.put(e.getKey(), e.getValue()));
572 // Check the values collection is correct
573 assertEquals(expectedValues.values().size(), ecMap.values().size());
574 expectedValues.values().forEach(v -> assertTrue(ecMap.values().contains(v)));
576 // Update the value for one of the keys
577 Map.Entry<String, String> first = expectedValues.entrySet().iterator().next();
578 expectedValues.put(first.getKey(), "new-value");
579 ecMap.put(first.getKey(), "new-value");
581 // Check the values collection is still correct
582 assertEquals(expectedValues.values().size(), ecMap.values().size());
583 expectedValues.values().forEach(v -> assertTrue(ecMap.values().contains(v)));
586 String removeKey = expectedValues.keySet().iterator().next();
587 expectedValues.remove(removeKey);
588 ecMap.remove(removeKey);
590 // Check the values collection is still correct
591 assertEquals(expectedValues.values().size(), ecMap.values().size());
592 expectedValues.values().forEach(v -> assertTrue(ecMap.values().contains(v)));
596 public void testEntrySet() throws Exception {
597 expectPeerMessage(clusterCommunicator);
599 assertTrue(ecMap.entrySet().isEmpty());
601 // Generate some values
602 Map<String, String> expectedValues = new HashMap<>();
603 for (int i = 1; i <= 10; i++) {
604 expectedValues.put("" + i, "value" + i);
607 // Add them into the map
608 expectedValues.entrySet().forEach(e -> ecMap.put(e.getKey(), e.getValue()));
610 // Check the entry set is correct
611 assertTrue(entrySetsAreEqual(expectedValues, ecMap.entrySet()));
613 // Update the value for one of the keys
614 Map.Entry<String, String> first = expectedValues.entrySet().iterator().next();
615 expectedValues.put(first.getKey(), "new-value");
616 ecMap.put(first.getKey(), "new-value");
618 // Check the entry set is still correct
619 assertTrue(entrySetsAreEqual(expectedValues, ecMap.entrySet()));
622 String removeKey = expectedValues.keySet().iterator().next();
623 expectedValues.remove(removeKey);
624 ecMap.remove(removeKey);
626 // Check the entry set is still correct
627 assertTrue(entrySetsAreEqual(expectedValues, ecMap.entrySet()));
630 private static boolean entrySetsAreEqual(Map<String, String> expectedMap, Set<Map.Entry<String, String>> actual) {
631 if (expectedMap.entrySet().size() != actual.size()) {
635 for (Map.Entry<String, String> e : actual) {
636 if (!expectedMap.containsKey(e.getKey())) {
639 if (!Objects.equals(expectedMap.get(e.getKey()), e.getValue())) {
647 public void testDestroy() throws Exception {
648 clusterCommunicator.removeSubscriber(UPDATE_MESSAGE_SUBJECT);
649 clusterCommunicator.removeSubscriber(ANTI_ENTROPY_MESSAGE_SUBJECT);
651 replay(clusterCommunicator);
655 verify(clusterCommunicator);
659 fail("get after destroy should throw exception");
660 } catch (IllegalStateException e) {
665 ecMap.put(KEY1, VALUE1);
666 fail("put after destroy should throw exception");
667 } catch (IllegalStateException e) {
672 private UpdateEntry<String, String> generatePutMessage(String key, String value, Timestamp timestamp) {
673 return new UpdateEntry<>(key, new MapValue<>(value, timestamp));
676 private List<UpdateEntry<String, String>> generatePutMessage(
677 String key1, String value1, String key2, String value2) {
678 List<UpdateEntry<String, String>> list = new ArrayList<>();
680 Timestamp timestamp1 = clockService.peek(1);
681 Timestamp timestamp2 = clockService.peek(2);
683 list.add(generatePutMessage(key1, value1, timestamp1));
684 list.add(generatePutMessage(key2, value2, timestamp2));
689 private UpdateEntry<String, String> generateRemoveMessage(String key, Timestamp timestamp) {
690 return new UpdateEntry<>(key, new MapValue<>(null, timestamp));
693 private List<UpdateEntry<String, String>> generateRemoveMessage(String key1, String key2) {
694 List<UpdateEntry<String, String>> list = new ArrayList<>();
696 Timestamp timestamp1 = clockService.peek(1);
697 Timestamp timestamp2 = clockService.peek(2);
699 list.add(generateRemoveMessage(key1, timestamp1));
700 list.add(generateRemoveMessage(key2, timestamp2));
706 * Sets up a mock ClusterCommunicationService to expect a specific cluster
707 * message to be broadcast to the cluster.
709 * @param message message we expect to be sent
710 * @param clusterCommunicator a mock ClusterCommunicationService to set up
713 private static <T> void expectSpecificBroadcastMessage(
715 MessageSubject subject,
716 ClusterCommunicationService clusterCommunicator) {
717 reset(clusterCommunicator);
718 clusterCommunicator.<T>multicast(eq(message), eq(subject), anyObject(Function.class), anyObject(Set.class));
719 expectLastCall().anyTimes();
720 replay(clusterCommunicator);
724 * Sets up a mock ClusterCommunicationService to expect a specific cluster
725 * message to be multicast to the cluster.
727 * @param message message we expect to be sent
728 * @param subject subject we expect to be sent to
729 * @param clusterCommunicator a mock ClusterCommunicationService to set up
732 private static <T> void expectSpecificMulticastMessage(T message, MessageSubject subject,
733 ClusterCommunicationService clusterCommunicator) {
734 reset(clusterCommunicator);
735 clusterCommunicator.<T>multicast(eq(message), eq(subject), anyObject(Function.class), anyObject(Set.class));
736 expectLastCall().anyTimes();
737 replay(clusterCommunicator);
742 * Sets up a mock ClusterCommunicationService to expect a multicast cluster message
743 * that is sent to it. This is useful for unit tests where we aren't
744 * interested in testing the messaging component.
746 * @param clusterCommunicator a mock ClusterCommunicationService to set up
749 private <T> void expectPeerMessage(ClusterCommunicationService clusterCommunicator) {
750 reset(clusterCommunicator);
751 // expect(clusterCommunicator.multicast(anyObject(ClusterMessage.class),
752 // anyObject(Iterable.class)))
753 expect(clusterCommunicator.<T>unicast(
755 anyObject(MessageSubject.class),
756 anyObject(Function.class),
757 anyObject(NodeId.class)))
758 .andReturn(CompletableFuture.completedFuture(null))
760 replay(clusterCommunicator);
764 * Sets up a mock ClusterCommunicationService to expect a broadcast cluster message
765 * that is sent to it. This is useful for unit tests where we aren't
766 * interested in testing the messaging component.
768 * @param clusterCommunicator a mock ClusterCommunicationService to set up
770 private void expectBroadcastMessage(ClusterCommunicationService clusterCommunicator) {
771 reset(clusterCommunicator);
772 clusterCommunicator.<AbstractEvent>multicast(
773 anyObject(AbstractEvent.class),
774 anyObject(MessageSubject.class),
775 anyObject(Function.class),
776 anyObject(Set.class));
777 expectLastCall().anyTimes();
778 replay(clusterCommunicator);
782 * ClusterCommunicationService implementation that the map's addSubscriber
783 * call will delegate to. This means we can get a reference to the
784 * internal cluster message handler used by the map, so that we can simulate
785 * events coming in from other instances.
787 private final class TestClusterCommunicationService
788 extends ClusterCommunicationServiceAdapter {
791 public <M> void addSubscriber(MessageSubject subject,
792 Function<byte[], M> decoder, Consumer<M> handler,
794 if (subject.equals(UPDATE_MESSAGE_SUBJECT)) {
795 updateHandler = (Consumer<Collection<UpdateEntry<String, String>>>) handler;
796 } else if (subject.equals(ANTI_ENTROPY_MESSAGE_SUBJECT)) {
797 antiEntropyHandler = (Consumer<AntiEntropyAdvertisement<String>>) handler;
799 throw new RuntimeException("Unexpected message subject " + subject.toString());
805 * ClockService implementation that gives out timestamps based on a
806 * sequential counter. This clock service enables more control over the
807 * timestamps that are given out, including being able to "turn back time"
808 * to give out timestamps from the past.
810 * @param <T> Type that the clock service will give out timestamps for
811 * @param <U> Second type that the clock service will give out values for
813 private class SequentialClockService<T, U> {
815 private static final long INITIAL_VALUE = 1;
816 private final AtomicLong counter = new AtomicLong(INITIAL_VALUE);
818 public Timestamp getTimestamp(T object, U object2) {
819 return new TestTimestamp(counter.getAndIncrement());
823 * Returns what the next timestamp will be without consuming the
824 * timestamp. This allows test code to set expectations correctly while
825 * still allowing the CUT to get the same timestamp.
827 * @return timestamp equal to the timestamp that will be returned by the
828 * next call to {@link #getTimestamp(T, U)}.
830 public Timestamp peekAtNextTimestamp() {
835 * Returns the ith timestamp to be given out in the future without
836 * consuming the timestamp. For example, i=1 returns the next timestamp,
837 * i=2 returns the timestamp after that, and so on.
839 * @param i number of the timestamp to peek at
840 * @return the ith timestamp that will be given out
842 public Timestamp peek(int i) {
843 checkArgument(i > 0, "i must be a positive integer");
845 return new TestTimestamp(counter.get() + i - 1);
849 * Turns the clock back two ticks, so the next call to getTimestamp will
850 * return an older timestamp than the previous call to getTimestamp.
852 public void turnBackTime() {
853 // Not atomic, but should be OK for these tests.
854 counter.decrementAndGet();
855 counter.decrementAndGet();
861 * Timestamp implementation where the value of the timestamp can be
862 * specified explicitly at creation time.
864 private class TestTimestamp implements Timestamp {
866 private final long timestamp;
869 * Creates a new timestamp that has the specified value.
871 * @param timestamp value of the timestamp
873 public TestTimestamp(long timestamp) {
874 this.timestamp = timestamp;
878 public int compareTo(Timestamp o) {
879 checkArgument(o instanceof TestTimestamp);
880 TestTimestamp otherTimestamp = (TestTimestamp) o;
881 return ComparisonChain.start()
882 .compare(this.timestamp, otherTimestamp.timestamp)
888 * EventuallyConsistentMapListener implementation which triggers a latch
889 * when it receives an event.
891 private class TestListener implements EventuallyConsistentMapListener<String, String> {
892 private CountDownLatch latch;
895 * Creates a new listener that will trigger the specified latch when it
896 * receives and event.
898 * @param latch the latch to trigger on events
900 public TestListener(CountDownLatch latch) {
905 public void event(EventuallyConsistentMapEvent<String, String> event) {