Examples with StaleReadDetector com.hazelcast.internal.nearcache.impl.invalidation.StaleReadDetector used on opensource projects

Example 1 with StaleReadDetector

use of com.hazelcast.internal.nearcache.impl.invalidation.StaleReadDetector in project hazelcast by hazelcast.

the class ClientCacheInvalidationMemberAddRemoveTest method ensure_nearCachedClient_and_member_data_sync_eventually.

@Test
public void ensure_nearCachedClient_and_member_data_sync_eventually() {
    final AtomicBoolean stopTest = new AtomicBoolean();
    final Config config = createConfig();
    secondNode = hazelcastFactory.newHazelcastInstance(config);
    CachingProvider provider = createServerCachingProvider(serverInstance);
    final CacheManager serverCacheManager = provider.getCacheManager();
    // populated from member
    final Cache<Integer, Integer> memberCache = serverCacheManager.createCache(DEFAULT_CACHE_NAME, createCacheConfig(BINARY));
    for (int i = 0; i < KEY_COUNT; i++) {
        memberCache.put(i, i);
    }
    ClientConfig clientConfig = createClientConfig().addNearCacheConfig(createNearCacheConfig(BINARY));
    HazelcastClientProxy client = (HazelcastClientProxy) hazelcastFactory.newHazelcastClient(clientConfig);
    CachingProvider clientCachingProvider = createClientCachingProvider(client);
    final Cache<Integer, Integer> clientCache = clientCachingProvider.getCacheManager().createCache(DEFAULT_CACHE_NAME, createCacheConfig(BINARY));
    ArrayList<Thread> threads = new ArrayList<Thread>();
    // continuously adds and removes member
    Thread shadowMember = new Thread(new Runnable() {

        @Override
        public void run() {
            while (!stopTest.get()) {
                HazelcastInstance member = hazelcastFactory.newHazelcastInstance(config);
                sleepSeconds(5);
                member.getLifecycleService().terminate();
            }
        }
    });
    threads.add(shadowMember);
    for (int i = 0; i < NEAR_CACHE_POPULATE_THREAD_COUNT; i++) {
        // populates client Near Cache
        Thread populateClientNearCache = new Thread(new Runnable() {

            public void run() {
                int i = 0;
                while (!stopTest.get()) {
                    clientCache.get(i++);
                    if (i == KEY_COUNT) {
                        i = 0;
                    }
                }
            }
        });
        threads.add(populateClientNearCache);
    }
    // updates data from member
    Thread putFromMember = new Thread(new Runnable() {

        public void run() {
            while (!stopTest.get()) {
                int key = getInt(KEY_COUNT);
                int value = getInt(Integer.MAX_VALUE);
                memberCache.put(key, value);
                sleepAtLeastMillis(2);
            }
        }
    });
    threads.add(putFromMember);
    Thread clearFromMember = new Thread(new Runnable() {

        public void run() {
            while (!stopTest.get()) {
                memberCache.clear();
                sleepSeconds(3);
            }
        }
    });
    threads.add(clearFromMember);
    // start threads
    for (Thread thread : threads) {
        thread.start();
    }
    // stress system some seconds
    sleepSeconds(TEST_RUN_SECONDS);
    // stop threads
    stopTest.set(true);
    for (Thread thread : threads) {
        assertJoinable(thread);
    }
    assertTrueEventually(new AssertTask() {

        @Override
        public void run() {
            for (int i = 0; i < KEY_COUNT; i++) {
                Integer valueSeenFromMember = memberCache.get(i);
                Integer valueSeenFromClient = clientCache.get(i);
                String msg = createFailureMessage(i);
                assertEquals(msg, valueSeenFromMember, valueSeenFromClient);
            }
        }

        @SuppressWarnings("unchecked")
        private String createFailureMessage(int i) {
            int partitionId = getPartitionService(serverInstance).getPartitionId(i);
            NearCacheRecordStore nearCacheRecordStore = getNearCacheRecordStore();
            NearCacheRecord record = nearCacheRecordStore.getRecord(i);
            long recordSequence = record == null ? NO_SEQUENCE : record.getInvalidationSequence();
            // member-1
            MetaDataGenerator metaDataGenerator1 = getMetaDataGenerator(serverInstance);
            long memberSequence1 = metaDataGenerator1.currentSequence("/hz/" + DEFAULT_CACHE_NAME, partitionId);
            UUID memberUuid1 = metaDataGenerator1.getUuidOrNull(partitionId);
            // member-2
            MetaDataGenerator metaDataGenerator2 = getMetaDataGenerator(secondNode);
            long memberSequence2 = metaDataGenerator2.currentSequence("/hz/" + DEFAULT_CACHE_NAME, partitionId);
            UUID memberUuid2 = metaDataGenerator2.getUuidOrNull(partitionId);
            StaleReadDetector staleReadDetector = getStaleReadDetector(nearCacheRecordStore);
            MetaDataContainer metaDataContainer = staleReadDetector.getMetaDataContainer(partitionId);
            return format("On client: [uuid=%s, partition=%d, onRecordSequence=%d, latestSequence=%d, staleSequence=%d]," + "%nOn members: [memberUuid1=%s, memberSequence1=%d, memberUuid2=%s, memberSequence2=%d]", metaDataContainer.getUuid(), partitionId, recordSequence, metaDataContainer.getSequence(), metaDataContainer.getStaleSequence(), memberUuid1, memberSequence1, memberUuid2, memberSequence2);
        }

        private MetaDataGenerator getMetaDataGenerator(HazelcastInstance node) {
            CacheService service = getNodeEngineImpl(node).getService(CacheService.SERVICE_NAME);
            CacheEventHandler cacheEventHandler = service.getCacheEventHandler();
            return cacheEventHandler.getMetaDataGenerator();
        }

        private NearCacheRecordStore getNearCacheRecordStore() {
            NearCache nearCache = ((NearCachedClientCacheProxy) clientCache).getNearCache();
            DefaultNearCache defaultNearCache = (DefaultNearCache) nearCache.unwrap(DefaultNearCache.class);
            return defaultNearCache.getNearCacheRecordStore();
        }
    });
}