Value Members

1.  final def !=(arg0: Any): Boolean

   Definition Classes

   AnyRef → Any

2.  final def ##(): Int

   Definition Classes

   AnyRef → Any

3.  final def ==(arg0: Any): Boolean

   Definition Classes

   AnyRef → Any

4.  def add(batchId: Long, logs: Array[FileEntry]): Boolean

   Store the metadata for the specified batchId and return true if successful.

   Store the metadata for the specified batchId and return true if successful. If the batchId's metadata has already been stored, this method will return false.

   Definition Classes

   FileStreamSourceLog → CompactibleFileStreamLog → HDFSMetadataLog → MetadataLog

5.  def addNewBatchByStream(batchId: Long)(fn: (OutputStream) ⇒ Unit): Boolean

   Store the metadata for the specified batchId and return true if successful.

   Store the metadata for the specified batchId and return true if successful. This method fills the content of metadata via executing function. If the function throws an exception, writing will be automatically cancelled and this method will propagate the exception.

   If the batchId's metadata has already been stored, this method will return false.

   Writing the metadata is done by writing a batch to a temp file then rename it to the batch file.

   There may be multiple HDFSMetadataLog using the same metadata path. Although it is not a valid behavior, we still need to prevent it from destroying the files.

   Definition Classes

   HDFSMetadataLog

6.  def allFiles(): Array[FileEntry]

   Returns all files except the deleted ones.

   Returns all files except the deleted ones.

   Definition Classes

   CompactibleFileStreamLog

7.  def applyFnToBatchByStream[RET](batchId: Long)(fn: (InputStream) ⇒ RET): RET

   Apply provided function to each entry in the specific batch metadata log.

   Apply provided function to each entry in the specific batch metadata log.

   Unlike get which will materialize all entries into memory, this method streamlines the process via READ-AND-PROCESS. This helps to avoid the memory issue on huge metadata log file.

   NOTE: This no longer fails early on corruption. The caller should handle the exception properly and make sure the logic is not affected by failing in the middle.

   Definition Classes

   HDFSMetadataLog

8.  final def asInstanceOf[T0]: T0

   Definition Classes

   Any

9.  val batchFilesFilter: PathFilter

   A PathFilter to filter only batch files

   A PathFilter to filter only batch files

   Attributes

   protected

   Definition Classes

   HDFSMetadataLog

10.  def batchIdToPath(batchId: Long): Path

    Definition Classes

    CompactibleFileStreamLog → HDFSMetadataLog

11.  def clone(): AnyRef

    Attributes

    protected[lang]

    Definition Classes

    AnyRef

    Annotations

    @throws( ... ) @native()

12.  final lazy val compactInterval: Int

    Attributes

    protected

    Definition Classes

    CompactibleFileStreamLog

13.  val defaultCompactInterval: Int

    Attributes

    protected

    Definition Classes

    FileStreamSourceLog → CompactibleFileStreamLog

14.  def deserialize(in: InputStream): Array[FileEntry]

    Read and deserialize the metadata from input stream.

    Read and deserialize the metadata from input stream. If this method is overridden in a subclass, the overriding method should not close the given input stream, as it will be closed in the caller.

    Definition Classes

    CompactibleFileStreamLog → HDFSMetadataLog

15.  final def eq(arg0: AnyRef): Boolean

    Definition Classes

    AnyRef

16.  def equals(arg0: Any): Boolean

    Definition Classes

    AnyRef → Any

17.  val fileCleanupDelayMs: Long

    If we delete the old files after compaction at once, there is a race condition in S3: other processes may see the old files are deleted but still cannot see the compaction file using "list".

    If we delete the old files after compaction at once, there is a race condition in S3: other processes may see the old files are deleted but still cannot see the compaction file using "list". The allFiles handles this by looking for the next compaction file directly, however, a live lock may happen if the compaction happens too frequently: one processing keeps deleting old files while another one keeps retrying. Setting a reasonable cleanup delay could avoid it.

    Attributes

    protected

    Definition Classes

    FileStreamSourceLog → CompactibleFileStreamLog

18.  val fileManager: CheckpointFileManager

    Attributes

    protected

    Definition Classes

    HDFSMetadataLog

19.  def filterInBatch(batchId: Long)(predicate: (FileEntry) ⇒ Boolean): Option[Array[FileEntry]]

    Apply filter on all entries in the specific batch.

    Apply filter on all entries in the specific batch.

    Definition Classes

    CompactibleFileStreamLog

20.  def finalize(): Unit

    Attributes

    protected[lang]

    Definition Classes

    AnyRef

    Annotations

    @throws( classOf[java.lang.Throwable] )

21.  def foreachInBatch(batchId: Long)(fn: (FileEntry) ⇒ Unit): Unit

    Apply function on all entries in the specific batch.

    Apply function on all entries in the specific batch. The method will throw FileNotFoundException if the metadata log file doesn't exist.

    NOTE: This doesn't fail early on corruption. The caller should handle the exception properly and make sure the logic is not affected by failing in the middle.

    Definition Classes

    CompactibleFileStreamLog

22.  def get(startId: Option[Long], endId: Option[Long]): Array[(Long, Array[FileEntry])]

    Return metadata for batches between startId (inclusive) and endId (inclusive).

    Return metadata for batches between startId (inclusive) and endId (inclusive). If startId is None, just return all batches before endId (inclusive).

    Definition Classes

    FileStreamSourceLog → HDFSMetadataLog → MetadataLog

23.  def get(batchId: Long): Option[Array[FileEntry]]

    Return the metadata for the specified batchId if it's stored.

    Return the metadata for the specified batchId if it's stored. Otherwise, return None.

    Definition Classes

    HDFSMetadataLog → MetadataLog

24.  final def getClass(): Class[_]

    Definition Classes

    AnyRef → Any

    Annotations

    @native()

25.  def getLatest(): Option[(Long, Array[FileEntry])]

    Return the latest batch Id and its metadata if exist.

    Return the latest batch Id and its metadata if exist.

    Definition Classes

    HDFSMetadataLog → MetadataLog

26.  def getLatestBatchId(): Option[Long]

    Return the latest batch Id without reading the file.

    Return the latest batch Id without reading the file. This method only checks for existence of file to avoid cost on reading and deserializing log file.

    Definition Classes

    HDFSMetadataLog

27.  def getOrderedBatchFiles(): Array[FileStatus]

    Get an array of [FileStatus] referencing batch files.

    Get an array of [FileStatus] referencing batch files. The array is sorted by most recent batch file first to oldest batch file.

    Definition Classes

    HDFSMetadataLog

28.  def hashCode(): Int

    Definition Classes

    AnyRef → Any

    Annotations

    @native()

29.  def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean

    Attributes

    protected

    Definition Classes

    Logging

30.  def initializeLogIfNecessary(isInterpreter: Boolean): Unit

    Attributes

    protected

    Definition Classes

    Logging

31.  def isBatchFile(path: Path): Boolean

    Definition Classes

    CompactibleFileStreamLog → HDFSMetadataLog

32.  val isDeletingExpiredLog: Boolean

    Attributes

    protected

    Definition Classes

    FileStreamSourceLog → CompactibleFileStreamLog

33.  final def isInstanceOf[T0]: Boolean

    Definition Classes

    Any

34.  def isTraceEnabled(): Boolean

    Attributes

    protected

    Definition Classes

    Logging

35.  def log: Logger

    Attributes

    protected

    Definition Classes

    Logging

36.  def logDebug(msg: ⇒ String, throwable: Throwable): Unit

    Attributes

    protected

    Definition Classes

    Logging

37.  def logDebug(msg: ⇒ String): Unit

    Attributes

    protected

    Definition Classes

    Logging

38.  def logError(msg: ⇒ String, throwable: Throwable): Unit

    Attributes

    protected

    Definition Classes

    Logging

39.  def logError(msg: ⇒ String): Unit

    Attributes

    protected

    Definition Classes

    Logging

40.  def logInfo(msg: ⇒ String, throwable: Throwable): Unit

    Attributes

    protected

    Definition Classes

    Logging

41.  def logInfo(msg: ⇒ String): Unit

    Attributes

    protected

    Definition Classes

    Logging

42.  def logName: String

    Attributes

    protected

    Definition Classes

    Logging

43.  def logTrace(msg: ⇒ String, throwable: Throwable): Unit

    Attributes

    protected

    Definition Classes

    Logging

44.  def logTrace(msg: ⇒ String): Unit

    Attributes

    protected

    Definition Classes

    Logging

45.  def logWarning(msg: ⇒ String, throwable: Throwable): Unit

    Attributes

    protected

    Definition Classes

    Logging

46.  def logWarning(msg: ⇒ String): Unit

    Attributes

    protected

    Definition Classes

    Logging

47.  val metadataPath: Path

    Definition Classes

    HDFSMetadataLog

48.  val minBatchesToRetain: Int

    Attributes

    protected

    Definition Classes

    CompactibleFileStreamLog

49.  final def ne(arg0: AnyRef): Boolean

    Definition Classes

    AnyRef

50.  final def notify(): Unit

    Definition Classes

    AnyRef

    Annotations

    @native()

51.  final def notifyAll(): Unit

    Definition Classes

    AnyRef

    Annotations

    @native()

52.  def pathToBatchId(path: Path): Long

    Definition Classes

    CompactibleFileStreamLog → HDFSMetadataLog

53.  def purge(thresholdBatchId: Long): Unit

    CompactibleFileStreamLog maintains logs by itself, and manual purging might break internal state, specifically which latest compaction batch is purged.

    CompactibleFileStreamLog maintains logs by itself, and manual purging might break internal state, specifically which latest compaction batch is purged.

    To simplify the situation, this method just throws UnsupportedOperationException regardless of given parameter, and let CompactibleFileStreamLog handles purging by itself.

    Definition Classes

    CompactibleFileStreamLog → HDFSMetadataLog → MetadataLog

54.  def purgeAfter(thresholdBatchId: Long): Unit

    Removes all log entries later than thresholdBatchId (exclusive).

    Removes all log entries later than thresholdBatchId (exclusive).

    Definition Classes

    HDFSMetadataLog

55.  def restore(): Array[FileEntry]
56.  def serialize(logData: Array[FileEntry], out: OutputStream): Unit

    Serialize the metadata and write to the output stream.

    Serialize the metadata and write to the output stream. If this method is overridden in a subclass, the overriding method should not close the given output stream, as it will be closed in the caller.

    Definition Classes

    CompactibleFileStreamLog → HDFSMetadataLog

57.  def shouldRetain(log: FileEntry, currentTime: Long): Boolean

    Determine whether the log should be retained or not.

    Determine whether the log should be retained or not.

    Default implementation retains all log entries. Implementations should override the method to change the behavior.

    Definition Classes

    CompactibleFileStreamLog

58.  final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes

    AnyRef

59.  def toString(): String

    Definition Classes

    AnyRef → Any

60.  final def wait(): Unit

    Definition Classes

    AnyRef

    Annotations

    @throws( ... )

61.  final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes

    AnyRef

    Annotations

    @throws( ... )

62.  final def wait(arg0: Long): Unit

    Definition Classes

    AnyRef

    Annotations

    @throws( ... ) @native()