Examples with ExternalViewChangeListener org.apache.helix.ExternalViewChangeListener used on opensource projects

Example 1 with ExternalViewChangeListener

use of org.apache.helix.ExternalViewChangeListener in project pinot by linkedin.

the class HybridClusterIntegrationTest method setUp.

@BeforeClass
public void setUp() throws Exception {
    //Clean up
    ensureDirectoryExistsAndIsEmpty(_tmpDir);
    ensureDirectoryExistsAndIsEmpty(_segmentDir);
    ensureDirectoryExistsAndIsEmpty(_tarDir);
    tableName = TABLE_NAME;
    // Start Zk, Kafka and Pinot
    startHybridCluster(10);
    // Unpack the Avro files
    TarGzCompressionUtils.unTar(new File(TestUtils.getFileFromResourceUrl(OfflineClusterIntegrationTest.class.getClassLoader().getResource("On_Time_On_Time_Performance_2014_100k_subset_nonulls.tar.gz"))), _tmpDir);
    _tmpDir.mkdirs();
    final List<File> avroFiles = getAllAvroFiles();
    File schemaFile = getSchemaFile();
    schema = Schema.fromFile(schemaFile);
    addSchema(schemaFile, schema.getSchemaName());
    final List<String> invertedIndexColumns = makeInvertedIndexColumns();
    final String sortedColumn = makeSortedColumn();
    // Create Pinot table
    addHybridTable(tableName, "DaysSinceEpoch", "daysSinceEpoch", KafkaStarterUtils.DEFAULT_ZK_STR, KAFKA_TOPIC, schema.getSchemaName(), TENANT_NAME, TENANT_NAME, avroFiles.get(0), sortedColumn, invertedIndexColumns, null, false);
    LOGGER.info("Running with Sorted column=" + sortedColumn + " and inverted index columns = " + invertedIndexColumns);
    // Create a subset of the first 8 segments (for offline) and the last 6 segments (for realtime)
    final List<File> offlineAvroFiles = getOfflineAvroFiles(avroFiles);
    final List<File> realtimeAvroFiles = getRealtimeAvroFiles(avroFiles);
    // Load data into H2
    ExecutorService executor = Executors.newCachedThreadPool();
    setupH2AndInsertAvro(avroFiles, executor);
    // Create segments from Avro data
    LOGGER.info("Creating offline segments from avro files " + offlineAvroFiles);
    buildSegmentsFromAvro(offlineAvroFiles, executor, 0, _segmentDir, _tarDir, tableName, false, null);
    // Initialize query generator
    setupQueryGenerator(avroFiles, executor);
    executor.shutdown();
    executor.awaitTermination(10, TimeUnit.MINUTES);
    // Set up a Helix spectator to count the number of segments that are uploaded and unlock the latch once 12 segments are online
    final CountDownLatch latch = new CountDownLatch(1);
    HelixManager manager = HelixManagerFactory.getZKHelixManager(getHelixClusterName(), "test_instance", InstanceType.SPECTATOR, ZkStarter.DEFAULT_ZK_STR);
    manager.connect();
    manager.addExternalViewChangeListener(new ExternalViewChangeListener() {

        @Override
        public void onExternalViewChange(List<ExternalView> externalViewList, NotificationContext changeContext) {
            for (ExternalView externalView : externalViewList) {
                if (externalView.getId().contains(tableName)) {
                    Set<String> partitionSet = externalView.getPartitionSet();
                    if (partitionSet.size() == offlineSegmentCount) {
                        int onlinePartitionCount = 0;
                        for (String partitionId : partitionSet) {
                            Map<String, String> partitionStateMap = externalView.getStateMap(partitionId);
                            if (partitionStateMap.containsValue("ONLINE")) {
                                onlinePartitionCount++;
                            }
                        }
                        if (onlinePartitionCount == offlineSegmentCount) {
                            //                System.out.println("Got " + offlineSegmentCount + " online tables, unlatching the main thread");
                            latch.countDown();
                        }
                    }
                }
            }
        }
    });
    // Upload the segments
    int i = 0;
    for (String segmentName : _tarDir.list()) {
        //      System.out.println("Uploading segment " + (i++) + " : " + segmentName);
        File file = new File(_tarDir, segmentName);
        FileUploadUtils.sendSegmentFile("localhost", "8998", segmentName, file, file.length());
    }
    // Wait for all offline segments to be online
    latch.await();
    // Load realtime data into Kafka
    LOGGER.info("Pushing data from realtime avro files " + realtimeAvroFiles);
    pushAvroIntoKafka(realtimeAvroFiles, KafkaStarterUtils.DEFAULT_KAFKA_BROKER, KAFKA_TOPIC);
    // Wait until the Pinot event count matches with the number of events in the Avro files
    int pinotRecordCount, h2RecordCount;
    long timeInFiveMinutes = System.currentTimeMillis() + 5 * 60 * 1000L;
    Statement statement = _connection.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
    statement.execute("select count(*) from " + tableName);
    ResultSet rs = statement.getResultSet();
    rs.first();
    h2RecordCount = rs.getInt(1);
    rs.close();
    waitForRecordCountToStabilizeToExpectedCount(h2RecordCount, timeInFiveMinutes);
}

Example 2 with ExternalViewChangeListener

use of org.apache.helix.ExternalViewChangeListener in project pinot by linkedin.

the class BaseClusterIntegrationTest method setupSegmentCountCountDownLatch.

protected CountDownLatch setupSegmentCountCountDownLatch(final String tableName, final int expectedSegmentCount) throws Exception {
    final CountDownLatch latch = new CountDownLatch(1);
    HelixManager manager = HelixManagerFactory.getZKHelixManager(getHelixClusterName(), "test_instance", InstanceType.SPECTATOR, ZkStarter.DEFAULT_ZK_STR);
    manager.connect();
    manager.addExternalViewChangeListener(new ExternalViewChangeListener() {

        private boolean _hasBeenTriggered = false;

        @Override
        public void onExternalViewChange(List<ExternalView> externalViewList, NotificationContext changeContext) {
            // Nothing to do?
            if (_hasBeenTriggered) {
                return;
            }
            for (ExternalView externalView : externalViewList) {
                if (externalView.getId().contains(tableName)) {
                    Set<String> partitionSet = externalView.getPartitionSet();
                    if (partitionSet.size() == expectedSegmentCount) {
                        int onlinePartitionCount = 0;
                        for (String partitionId : partitionSet) {
                            Map<String, String> partitionStateMap = externalView.getStateMap(partitionId);
                            if (partitionStateMap.containsValue("ONLINE")) {
                                onlinePartitionCount++;
                            }
                        }
                        if (onlinePartitionCount == expectedSegmentCount) {
                            //                System.out.println("Got " + expectedSegmentCount + " online tables, unlatching the main thread");
                            latch.countDown();
                            _hasBeenTriggered = true;
                        }
                    }
                }
            }
        }
    });
    return latch;
}