Examples with PathChildrenCache org.apache.curator.framework.recipes.cache.PathChildrenCache used on opensource projects

Example 61 with PathChildrenCache

use of org.apache.curator.framework.recipes.cache.PathChildrenCache in project druid by druid-io.

the class CuratorInventoryManager method stop.

public void stop() throws IOException {
    synchronized (lock) {
        PathChildrenCache childrenCache = this.childrenCache;
        if (childrenCache == null) {
            return;
        }
        // This close() call actually calls shutdownNow() on the executor registered with the Cache object...
        childrenCache.close();
        this.childrenCache = null;
    }
    Closer closer = Closer.create();
    for (ContainerHolder containerHolder : containers.values()) {
        closer.register(containerHolder.getCache());
    }
    try {
        closer.close();
    } finally {
        pathChildrenCacheExecutor.shutdown();
    }
}

Example 62 with PathChildrenCache

use of org.apache.curator.framework.recipes.cache.PathChildrenCache in project druid by druid-io.

the class CuratorInventoryManager method start.

public void start() throws Exception {
    PathChildrenCache childrenCache;
    synchronized (lock) {
        childrenCache = this.childrenCache;
        if (childrenCache != null) {
            return;
        }
        this.childrenCache = childrenCache = cacheFactory.make(curatorFramework, config.getContainerPath());
    }
    childrenCache.getListenable().addListener(new ContainerCacheListener());
    try {
        childrenCache.start(PathChildrenCache.StartMode.POST_INITIALIZED_EVENT);
    } catch (Exception e) {
        synchronized (lock) {
            try {
                stop();
            } catch (IOException e1) {
                log.error(e1, "Exception when stopping InventoryManager that couldn't start.");
            }
        }
        throw e;
    }
}

Example 63 with PathChildrenCache

use of org.apache.curator.framework.recipes.cache.PathChildrenCache in project druid by druid-io.

the class DruidCoordinatorTest method testCoordinatorTieredRun.

@Test(timeout = 60_000L)
public void testCoordinatorTieredRun() throws Exception {
    final String dataSource = "dataSource", hotTierName = "hot", coldTierName = "cold";
    final Rule hotTier = new IntervalLoadRule(Intervals.of("2018-01-01/P1M"), ImmutableMap.of(hotTierName, 1));
    final Rule coldTier = new ForeverLoadRule(ImmutableMap.of(coldTierName, 1));
    final String loadPathCold = "/druid/loadqueue/cold:1234";
    final DruidServer hotServer = new DruidServer("hot", "hot", null, 5L, ServerType.HISTORICAL, hotTierName, 0);
    final DruidServer coldServer = new DruidServer("cold", "cold", null, 5L, ServerType.HISTORICAL, coldTierName, 0);
    final Map<String, DataSegment> dataSegments = ImmutableMap.of("2018-01-02T00:00:00.000Z_2018-01-03T00:00:00.000Z", new DataSegment(dataSource, Intervals.of("2018-01-02/P1D"), "v1", null, null, null, null, 0x9, 0), "2018-01-03T00:00:00.000Z_2018-01-04T00:00:00.000Z", new DataSegment(dataSource, Intervals.of("2018-01-03/P1D"), "v1", null, null, null, null, 0x9, 0), "2017-01-01T00:00:00.000Z_2017-01-02T00:00:00.000Z", new DataSegment(dataSource, Intervals.of("2017-01-01/P1D"), "v1", null, null, null, null, 0x9, 0));
    final LoadQueuePeon loadQueuePeonCold = new CuratorLoadQueuePeon(curator, loadPathCold, objectMapper, Execs.scheduledSingleThreaded("coordinator_test_load_queue_peon_cold_scheduled-%d"), Execs.singleThreaded("coordinator_test_load_queue_peon_cold-%d"), druidCoordinatorConfig);
    final PathChildrenCache pathChildrenCacheCold = new PathChildrenCache(curator, loadPathCold, true, true, Execs.singleThreaded("coordinator_test_path_children_cache_cold-%d"));
    loadManagementPeons.putAll(ImmutableMap.of("hot", loadQueuePeon, "cold", loadQueuePeonCold));
    loadQueuePeonCold.start();
    pathChildrenCache.start();
    pathChildrenCacheCold.start();
    DruidDataSource[] druidDataSources = { new DruidDataSource(dataSource, Collections.emptyMap()) };
    dataSegments.values().forEach(druidDataSources[0]::addSegment);
    setupSegmentsMetadataMock(druidDataSources[0]);
    EasyMock.expect(metadataRuleManager.getRulesWithDefault(EasyMock.anyString())).andReturn(ImmutableList.of(hotTier, coldTier)).atLeastOnce();
    EasyMock.expect(metadataRuleManager.getAllRules()).andReturn(ImmutableMap.of(dataSource, ImmutableList.of(hotTier, coldTier))).atLeastOnce();
    EasyMock.expect(serverInventoryView.getInventory()).andReturn(ImmutableList.of(hotServer, coldServer)).atLeastOnce();
    EasyMock.expect(serverInventoryView.isStarted()).andReturn(true).anyTimes();
    EasyMock.replay(metadataRuleManager, serverInventoryView);
    coordinator.start();
    // Wait for this coordinator to become leader
    leaderAnnouncerLatch.await();
    final CountDownLatch assignSegmentLatchHot = createCountDownLatchAndSetPathChildrenCacheListenerWithLatch(2, pathChildrenCache, dataSegments, hotServer);
    final CountDownLatch assignSegmentLatchCold = createCountDownLatchAndSetPathChildrenCacheListenerWithLatch(1, pathChildrenCacheCold, dataSegments, coldServer);
    assignSegmentLatchHot.await();
    assignSegmentLatchCold.await();
    final CountDownLatch coordinatorRunLatch = new CountDownLatch(2);
    serviceEmitter.latch = coordinatorRunLatch;
    coordinatorRunLatch.await();
    Assert.assertEquals(ImmutableMap.of(dataSource, 100.0), coordinator.getLoadStatus());
    Map<String, Object2LongMap<String>> underReplicationCountsPerDataSourcePerTier = coordinator.computeUnderReplicationCountsPerDataSourcePerTier();
    Assert.assertEquals(2, underReplicationCountsPerDataSourcePerTier.size());
    Assert.assertEquals(0L, underReplicationCountsPerDataSourcePerTier.get(hotTierName).getLong(dataSource));
    Assert.assertEquals(0L, underReplicationCountsPerDataSourcePerTier.get(coldTierName).getLong(dataSource));
    Map<String, Object2LongMap<String>> underReplicationCountsPerDataSourcePerTierUsingClusterView = coordinator.computeUnderReplicationCountsPerDataSourcePerTierUsingClusterView();
    Assert.assertEquals(2, underReplicationCountsPerDataSourcePerTierUsingClusterView.size());
    Assert.assertEquals(0L, underReplicationCountsPerDataSourcePerTierUsingClusterView.get(hotTierName).getLong(dataSource));
    Assert.assertEquals(0L, underReplicationCountsPerDataSourcePerTierUsingClusterView.get(coldTierName).getLong(dataSource));
    coordinator.stop();
    leaderUnannouncerLatch.await();
    EasyMock.verify(serverInventoryView);
    EasyMock.verify(segmentsMetadataManager);
    EasyMock.verify(metadataRuleManager);
}

Example 64 with PathChildrenCache

use of org.apache.curator.framework.recipes.cache.PathChildrenCache in project druid by druid-io.

the class DruidCoordinatorTest method setUp.

@Before
public void setUp() throws Exception {
    druidServer = EasyMock.createMock(DruidServer.class);
    serverInventoryView = EasyMock.createMock(BatchServerInventoryView.class);
    segmentsMetadataManager = EasyMock.createNiceMock(SegmentsMetadataManager.class);
    dataSourcesSnapshot = EasyMock.createNiceMock(DataSourcesSnapshot.class);
    coordinatorRuntimeParams = EasyMock.createNiceMock(DruidCoordinatorRuntimeParams.class);
    metadataRuleManager = EasyMock.createNiceMock(MetadataRuleManager.class);
    JacksonConfigManager configManager = EasyMock.createNiceMock(JacksonConfigManager.class);
    EasyMock.expect(configManager.watch(EasyMock.eq(CoordinatorDynamicConfig.CONFIG_KEY), EasyMock.anyObject(Class.class), EasyMock.anyObject())).andReturn(new AtomicReference(CoordinatorDynamicConfig.builder().build())).anyTimes();
    EasyMock.expect(configManager.watch(EasyMock.eq(CoordinatorCompactionConfig.CONFIG_KEY), EasyMock.anyObject(Class.class), EasyMock.anyObject())).andReturn(new AtomicReference(CoordinatorCompactionConfig.empty())).anyTimes();
    EasyMock.replay(configManager);
    setupServerAndCurator();
    curator.start();
    curator.blockUntilConnected();
    curator.create().creatingParentsIfNeeded().forPath(LOADPATH);
    objectMapper = new DefaultObjectMapper();
    druidCoordinatorConfig = new TestDruidCoordinatorConfig(new Duration(COORDINATOR_START_DELAY), new Duration(COORDINATOR_PERIOD), null, null, null, new Duration(COORDINATOR_PERIOD), null, null, null, null, null, null, null, null, null, null, 10, new Duration("PT0s"));
    pathChildrenCache = new PathChildrenCache(curator, LOADPATH, true, true, Execs.singleThreaded("coordinator_test_path_children_cache-%d"));
    loadQueuePeon = new CuratorLoadQueuePeon(curator, LOADPATH, objectMapper, Execs.scheduledSingleThreaded("coordinator_test_load_queue_peon_scheduled-%d"), Execs.singleThreaded("coordinator_test_load_queue_peon-%d"), druidCoordinatorConfig);
    loadQueuePeon.start();
    druidNode = new DruidNode("hey", "what", false, 1234, null, true, false);
    loadManagementPeons = new ConcurrentHashMap<>();
    scheduledExecutorFactory = new ScheduledExecutorFactory() {

        @Override
        public ScheduledExecutorService create(int corePoolSize, final String nameFormat) {
            return Executors.newSingleThreadScheduledExecutor();
        }
    };
    leaderAnnouncerLatch = new CountDownLatch(1);
    leaderUnannouncerLatch = new CountDownLatch(1);
    coordinator = new DruidCoordinator(druidCoordinatorConfig, new ZkPathsConfig() {

        @Override
        public String getBase() {
            return "druid";
        }
    }, configManager, segmentsMetadataManager, serverInventoryView, metadataRuleManager, () -> curator, serviceEmitter, scheduledExecutorFactory, null, null, new NoopServiceAnnouncer() {

        @Override
        public void announce(DruidNode node) {
            // count down when this coordinator becomes the leader
            leaderAnnouncerLatch.countDown();
        }

        @Override
        public void unannounce(DruidNode node) {
            leaderUnannouncerLatch.countDown();
        }
    }, druidNode, loadManagementPeons, null, new HashSet<>(), new CoordinatorCustomDutyGroups(ImmutableSet.of()), new CostBalancerStrategyFactory(), EasyMock.createNiceMock(LookupCoordinatorManager.class), new TestDruidLeaderSelector(), null, ZkEnablementConfig.ENABLED);
}

Example 65 with PathChildrenCache

use of org.apache.curator.framework.recipes.cache.PathChildrenCache in project druid by druid-io.

the class LoadQueuePeonTest method setUp.

@Before
public void setUp() throws Exception {
    setupServerAndCurator();
    curator.start();
    curator.blockUntilConnected();
    curator.create().creatingParentsIfNeeded().forPath(LOAD_QUEUE_PATH);
    loadQueueCache = new PathChildrenCache(curator, LOAD_QUEUE_PATH, true, true, Execs.singleThreaded("load_queue_cache-%d"));
}