Source:
public DataWriter(HdfsSinkConnectorConfig connectorConfig, SinkTaskContext context, AvroData avroData) { try { this.connectorConfig = connectorConfig; this.avroData = avroData; this.context = context; conf = new Configuration(); url = connectorConfig.getString(HdfsSinkConnectorConfig.HDFS_URL_CONFIG); topicsDir = connectorConfig.getString(HdfsSinkConnectorConfig.TOPICS_DIR_CONFIG); String logsDir = connectorConfig.getString(HdfsSinkConnectorConfig.LOGS_DIR_CONFIG); Class<? extends Storage> storageClass = (Class<? extends Storage>) Class .forName(connectorConfig.getString(HdfsSinkConnectorConfig.STORAGE_CLASS_CONFIG)); storage = StorageFactory.createStorage(storageClass, conf, url); createDir(topicsDir); createDir(logsDir); format = getFormat(); writerProvider = format.getRecordWriterProvider(); schemaFileReader = format.getSchemaFileReader(avroData); partitioner = createPartitioner(connectorConfig); assignment = context.assignment(); offsets = new HashMap<>(); lastAssignment = new HashSet<>(); hiveIntegration = connectorConfig.getBoolean(HdfsSinkConnectorConfig.HIVE_INTEGRATION_CONFIG); if (hiveIntegration) { hiveDatabase = connectorConfig.getString(HdfsSinkConnectorConfig.HIVE_DATABASE_CONFIG); hiveMetaStore = new HiveMetaStore(conf, connectorConfig); hive = format.getHiveUtil(connectorConfig, avroData, hiveMetaStore); executorService = Executors.newSingleThreadExecutor(); futures = new LinkedList<>(); } topicPartitionWriters = new HashMap<>(); for (TopicPartition tp: assignment) { TopicPartitionWriter topicPartitionWriter = new TopicPartitionWriter( tp, storage, writerProvider, partitioner, connectorConfig, context, avroData, hiveMetaStore, hive, schemaFileReader, executorService, futures); topicPartitionWriters.put(tp, topicPartitionWriter); } } catch (ClassNotFoundException | IllegalAccessException | InstantiationException e) { throw new ConnectException("Reflection exception: ", e); } catch (IOException e) { throw new ConnectException(e); } }

Target:
public DataWriter(HdfsSinkConnectorConfig connectorConfig, SinkTaskContext context, AvroData avroData) { try { this.connectorConfig = connectorConfig; this.avroData = avroData; this.context = context; conf = new Configuration(); url = connectorConfig.getString(HdfsSinkConnectorConfig.HDFS_URL_CONFIG); topicsDir = connectorConfig.getString(HdfsSinkConnectorConfig.TOPICS_DIR_CONFIG); String logsDir = connectorConfig.getString(HdfsSinkConnectorConfig.LOGS_DIR_CONFIG); Class<? extends Storage> storageClass = (Class<? extends Storage>) Class .forName(connectorConfig.getString(HdfsSinkConnectorConfig.STORAGE_CLASS_CONFIG)); storage = StorageFactory.createStorage(storageClass, conf, url); createDir(topicsDir); createDir(logsDir); format = getFormat(); writerProvider = format.getRecordWriterProvider(); schemaFileReader = format.getSchemaFileReader(avroData); partitioner = createPartitioner(connectorConfig); assignment = context.assignment(); offsets = new HashMap<>(); lastAssignment = new HashSet<>(); hiveIntegration = connectorConfig.getBoolean(HdfsSinkConnectorConfig.HIVE_INTEGRATION_CONFIG); if (hiveIntegration) { hiveDatabase = connectorConfig.getString(HdfsSinkConnectorConfig.HIVE_DATABASE_CONFIG); hiveMetaStore = new HiveMetaStore(conf, connectorConfig); hive = format.getHiveUtil(connectorConfig, avroData, hiveMetaStore); executorService = Executors.newSingleThreadExecutor(); hiveUpdateFutures = new LinkedList<>(); } topicPartitionWriters = new HashMap<>(); for (TopicPartition tp: assignment) { TopicPartitionWriter topicPartitionWriter = new TopicPartitionWriter( tp, storage, writerProvider, partitioner, connectorConfig, context, avroData, hiveMetaStore, hive, schemaFileReader, executorService, hiveUpdateFutures); topicPartitionWriters.put(tp, topicPartitionWriter); } } catch (ClassNotFoundException | IllegalAccessException | InstantiationException e) { throw new ConnectException("Reflection exception: ", e); } catch (IOException e) { throw new ConnectException(e); } }