io.gearpump.streaming.hadoop

HadoopCheckpointStore

Related Docs: object HadoopCheckpointStore | package hadoop

class HadoopCheckpointStore extends CheckpointStore

stores timestamp-checkpoint mapping to Hadoop-compatible filesystem store file layout timestamp1, index1, timestamp2, index2, ... timestampN, indexN

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CheckpointStore, AnyRef, Any
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Instance Constructors

  1. new HadoopCheckpointStore(dir: Path, fs: FileSystem, hadoopConfig: Configuration, rotation: Rotation)

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. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  5. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  6. def close(): Unit

    Definition Classes
    HadoopCheckpointStore → CheckpointStore

  7. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  8. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  9. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  10. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any

  11. def hashCode(): Int

    Definition Classes
    AnyRef → Any

  12. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

  13. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  14. final def notify(): Unit

    Definition Classes
    AnyRef

  15. final def notifyAll(): Unit

    Definition Classes
    AnyRef

  16. def persist(timestamp: TimeStamp, checkpoint: Array[Byte]): Unit

    persists a pair of timestamp and checkpoint, which

    persists a pair of timestamp and checkpoint, which

    1. creates a temporary checkpoint file, checkpoints-$startTime.store, if not exist 2. writes out (timestamp, checkpoint) and marks rotation 3. rotates checkpoint file if needed
      1. renames temporary checkpoint file to checkpoints-$startTime-$endTime.store b. closes current writer and reset c. rotation rotates
    Definition Classes
    HadoopCheckpointStore → CheckpointStore

  17. def recover(timestamp: TimeStamp): Option[Array[Byte]]

    recovers checkpoint given timestamp, which

    recovers checkpoint given timestamp, which

    1. returns None if no store exists 2. searches checkpoint stores for
      1. complete store checkpoints-$startTime-$endTime.store where startTime <= timestamp <= endTime b. temporary store checkpoints-$startTime.store where startTime <= timestamp 3. renames store to checkpoints-$startTime-$endTime.store 4. deletes all stores whose name has a startTime larger than timestamp 5. looks for the checkpoint in the found store
    Definition Classes
    HadoopCheckpointStore → CheckpointStore

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

    Definition Classes
    AnyRef

  19. def toString(): String

    Definition Classes
    AnyRef → Any

  20. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
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    @throws( ... )

  22. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
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    @throws( ... )

Inherited from CheckpointStore

Inherited from AnyRef

Inherited from Any

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