Packages

class OffsetSeqLog extends HDFSMetadataLog[OffsetSeq]

This class is used to log offsets to persistent files in HDFS. Each file corresponds to a specific batch of offsets. The file format contains a version string in the first line, followed by a the JSON string representation of the offsets separated by a newline character. If a source offset is missing, then that line will contain a string value defined in the SERIALIZED_VOID_OFFSET variable in OffsetSeqLog companion object. For instance, when dealing with LongOffset types: v1 // version 1 metadata {0} // LongOffset 0 {3} // LongOffset 3

  • // No offset for this source i.e., an invalid JSON string {2} // LongOffset 2 ...
Linear Supertypes
HDFSMetadataLog[OffsetSeq], Logging, MetadataLog[OffsetSeq], AnyRef, Any
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Inherited
  1. OffsetSeqLog
  2. HDFSMetadataLog
  3. Logging
  4. MetadataLog
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new OffsetSeqLog(sparkSession: SparkSession, path: String)

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, metadata: OffsetSeq): 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
    HDFSMetadataLog → MetadataLog
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. val batchFilesFilter: PathFilter

    A PathFilter to filter only batch files

    A PathFilter to filter only batch files

    Attributes
    protected
    Definition Classes
    HDFSMetadataLog
  7. def batchIdToPath(batchId: Long): Path
    Attributes
    protected
    Definition Classes
    HDFSMetadataLog
  8. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  9. def deserialize(in: InputStream): OffsetSeq

    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.

    Attributes
    protected
    Definition Classes
    OffsetSeqLog → HDFSMetadataLog
  10. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  11. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  12. val fileManager: CheckpointFileManager
    Attributes
    protected
    Definition Classes
    HDFSMetadataLog
  13. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  14. def get(startId: Option[Long], endId: Option[Long]): Array[(Long, OffsetSeq)]

    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
    HDFSMetadataLog → MetadataLog
  15. def get(batchId: Long): Option[OffsetSeq]

    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
  16. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  17. def getLatest(): Option[(Long, OffsetSeq)]

    Return the latest batch Id and its metadata if exist.

    Return the latest batch Id and its metadata if exist.

    Definition Classes
    HDFSMetadataLog → MetadataLog
  18. 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
  19. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  20. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  21. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
    Definition Classes
    Logging
  22. def isBatchFile(path: Path): Boolean
    Attributes
    protected
    Definition Classes
    HDFSMetadataLog
  23. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  24. def isTraceEnabled(): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  25. def log: Logger
    Attributes
    protected
    Definition Classes
    Logging
  26. def logDebug(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  27. def logDebug(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  28. def logError(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  29. def logError(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  30. def logInfo(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  31. def logInfo(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  32. def logName: String
    Attributes
    protected
    Definition Classes
    Logging
  33. def logTrace(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  34. def logTrace(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  35. def logWarning(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  36. def logWarning(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  37. val metadataPath: Path
    Definition Classes
    HDFSMetadataLog
  38. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  39. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  40. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  41. def pathToBatchId(path: Path): Long
    Attributes
    protected
    Definition Classes
    HDFSMetadataLog
  42. def purge(thresholdBatchId: Long): Unit

    Removes all the log entry earlier than thresholdBatchId (exclusive).

    Removes all the log entry earlier than thresholdBatchId (exclusive).

    Definition Classes
    HDFSMetadataLog → MetadataLog
  43. def purgeAfter(thresholdBatchId: Long): Unit

    Removes all log entries later than thresholdBatchId (exclusive).

    Removes all log entries later than thresholdBatchId (exclusive).

    Definition Classes
    HDFSMetadataLog
  44. def serialize(offsetSeq: OffsetSeq, 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.

    Attributes
    protected
    Definition Classes
    OffsetSeqLog → HDFSMetadataLog
  45. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  46. def toString(): String
    Definition Classes
    AnyRef → Any
  47. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  48. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  49. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from HDFSMetadataLog[OffsetSeq]

Inherited from Logging

Inherited from MetadataLog[OffsetSeq]

Inherited from AnyRef

Inherited from Any

Ungrouped