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sealed trait StreamingSessionWindowStateManager extends Serializable

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StreamingSessionWindowStateManagerImplV1
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  1. StreamingSessionWindowStateManager
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Abstract Value Members

  1. abstract def abortIfNeeded(store: StateStore): Unit

    Aborts the change.

  2. abstract def commit(store: StateStore): Long

    Commits the change.

  3. abstract def extractKeyWithoutSession(value: UnsafeRow): UnsafeRow

    Extracts the key without session window from the row.

    Extracts the key without session window from the row. This can be used to group session windows by key.

  4. abstract def getNumColsForPrefixKey: Int

    Returns the number of columns for prefix key in key schema.

  5. abstract def getSessions(store: ReadStateStore, key: UnsafeRow): Iterator[UnsafeRow]

    Returns all sessions for the key.

    Returns all sessions for the key.

    key

    The key without session, which can be retrieved from extractKeyWithoutSession.

  6. abstract def getStateKeySchema: StructType

    Returns the schema for key of the state.

  7. abstract def getStateValueSchema: StructType

    Returns the schema for value of the state.

  8. abstract def iterator(store: ReadStateStore): Iterator[UnsafeRow]

    Return an iterator containing all the sessions.

    Return an iterator containing all the sessions. Implementations must ensure that updates (puts, removes) can be made while iterating over this iterator.

  9. abstract def newOrModified(store: ReadStateStore, value: UnsafeRow): Boolean

    Returns true if the session of the given value doesn't exist in the store, or the value in the session is different to the stored value of the session in the store.

    Returns true if the session of the given value doesn't exist in the store, or the value in the session is different to the stored value of the session in the store. This can be used to control the output in UPDATE mode.

  10. abstract def removeByValueCondition(store: StateStore, removalCondition: (UnsafeRow) ⇒ Boolean): Iterator[UnsafeRow]

    Removes using a predicate on values, with returning removed values via iterator.

    Removes using a predicate on values, with returning removed values via iterator.

    At a high level, this produces an iterator over the (key, value, matched) tuples such that value satisfies the predicate, where producing an element removes the value from the state store and producing all elements with a given key updates it accordingly.

    This implies the iterator must be consumed fully without any other operations on this manager or the underlying store being interleaved.

    removalCondition

    The predicate on removing the key-value.

  11. abstract def updateSessions(store: StateStore, key: UnsafeRow, sessions: Seq[UnsafeRow]): (Long, Long)

    Replaces all sessions for the key to given one.

    Replaces all sessions for the key to given one.

    key

    The key without session, which can be retrieved from extractKeyWithoutSession.

    sessions

    The all sessions including existing sessions if it's active. Existing sessions which aren't included in this parameter will be removed.

    returns

    A tuple having two elements

    1. number of added/updated rows 2. number of deleted rows

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Deprecated Value Members

  1. def finalize(): Unit
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    Deprecated

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