Package akka.persistence.journal.leveldb

Interface LeveldbRecovery

All Superinterfaces:

AsyncRecovery

All Known Subinterfaces:

LeveldbStore

All Known Implementing Classes:

LeveldbJournal, SharedLeveldbStore

public interface LeveldbRecovery
extends AsyncRecovery

INTERNAL API.

LevelDB backed message replay and sequence number recovery.

Method Summary

Modifier and Type	Method	Description
scala.concurrent.Future<java.lang.Object>	asyncReadHighestSequenceNr(java.lang.String persistenceId, long fromSequenceNr)	Plugin API: asynchronously reads the highest stored sequence number for the given persistenceId.
scala.concurrent.Future<scala.runtime.BoxedUnit>	asyncReplayMessages(java.lang.String persistenceId, long fromSequenceNr, long toSequenceNr, long max, scala.Function1<PersistentRepr,scala.runtime.BoxedUnit> replayCallback)
scala.concurrent.Future<scala.runtime.BoxedUnit>	asyncReplayTaggedMessages(java.lang.String tag, long fromSequenceNr, long toSequenceNr, long max, scala.Function1<LeveldbJournal.ReplayedTaggedMessage,scala.runtime.BoxedUnit> replayCallback)
long	readHighestSequenceNr(int persistenceId)
void	replayMessages(int persistenceId, long fromSequenceNr, long toSequenceNr, long max, scala.Function1<PersistentRepr,scala.runtime.BoxedUnit> replayCallback)
void	replayTaggedMessages(java.lang.String tag, int tagNid, long fromSequenceNr, long toSequenceNr, long max, scala.Function1<LeveldbJournal.ReplayedTaggedMessage,scala.runtime.BoxedUnit> replayCallback)

Method Detail

asyncReadHighestSequenceNr

scala.concurrent.Future<java.lang.Object> asyncReadHighestSequenceNr(java.lang.String persistenceId,
                                                                     long fromSequenceNr)

Description copied from interface: AsyncRecovery

Plugin API: asynchronously reads the highest stored sequence number for the given persistenceId. The persistent actor will use the highest sequence number after recovery as the starting point when persisting new events. This sequence number is also used as toSequenceNr in subsequent call to AsyncRecovery.asyncReplayMessages(java.lang.String, long, long, long, scala.Function1<akka.persistence.PersistentRepr, scala.runtime.BoxedUnit>) unless the user has specified a lower toSequenceNr. Journal must maintain the highest sequence number and never decrease it.

This call is protected with a circuit-breaker.

Please also note that requests for the highest sequence number may be made concurrently to writes executing for the same persistenceId, in particular it is possible that a restarting actor tries to recover before its outstanding writes have completed.

Specified by:

asyncReadHighestSequenceNr in interface AsyncRecovery

Parameters:

persistenceId - persistent actor id.

fromSequenceNr - hint where to start searching for the highest sequence number. When a persistent actor is recovering this fromSequenceNr will be the sequence number of the used snapshot or 0L if no snapshot is used.

Returns:

(undocumented)

asyncReplayMessages

scala.concurrent.Future<scala.runtime.BoxedUnit> asyncReplayMessages(java.lang.String persistenceId,
                                                                     long fromSequenceNr,
                                                                     long toSequenceNr,
                                                                     long max,
                                                                     scala.Function1<PersistentRepr,scala.runtime.BoxedUnit> replayCallback)

Specified by:

asyncReplayMessages in interface AsyncRecovery

asyncReplayTaggedMessages

scala.concurrent.Future<scala.runtime.BoxedUnit> asyncReplayTaggedMessages(java.lang.String tag,
                                                                           long fromSequenceNr,
                                                                           long toSequenceNr,
                                                                           long max,
                                                                           scala.Function1<LeveldbJournal.ReplayedTaggedMessage,scala.runtime.BoxedUnit> replayCallback)

readHighestSequenceNr

long readHighestSequenceNr(int persistenceId)

replayMessages

void replayMessages(int persistenceId,
                    long fromSequenceNr,
                    long toSequenceNr,
                    long max,
                    scala.Function1<PersistentRepr,scala.runtime.BoxedUnit> replayCallback)

replayTaggedMessages

void replayTaggedMessages(java.lang.String tag,
                          int tagNid,
                          long fromSequenceNr,
                          long toSequenceNr,
                          long max,
                          scala.Function1<LeveldbJournal.ReplayedTaggedMessage,scala.runtime.BoxedUnit> replayCallback)