Class t.p.j.b.Journal:

Part of twisted.persisted.journal.base View Source View In Hierarchy

Known subclasses: twisted.persisted.journal.base.MemoryJournal, twisted.persisted.journal.rowjournal.RowJournal

All commands to the system get routed through here.

Subclasses should implement the actual snapshotting capability.
Method __init__ Undocumented
Method updateFromLog Run all commands from log that haven't been run yet.
Method executeCommand Log and execute a command.
Method _reallyExecute Callback called when logging command is done.
Method getLastSnapshot Return command index of the last snapshot taken.
Method sync Save journal to disk, returns Deferred of finish status.
def __init__(self, log, journaledService): (source)
overridden in twisted.persisted.journal.base.MemoryJournal, twisted.persisted.journal.rowjournal.RowJournal
Undocumented
def updateFromLog(self): (source)

Run all commands from log that haven't been run yet.

This method should be run on startup to ensure the snapshot is up-to-date.
def executeCommand(self, command): (source)
Log and execute a command.
def _reallyExecute(self, index, command, runTime): (source)
Callback called when logging command is done.
def getLastSnapshot(self): (source)
overridden in twisted.persisted.journal.base.MemoryJournal, twisted.persisted.journal.rowjournal.RowJournal
Return command index of the last snapshot taken.
def sync(self, *args, **kwargs): (source)
overridden in twisted.persisted.journal.base.MemoryJournal, twisted.persisted.journal.rowjournal.RowJournal

Save journal to disk, returns Deferred of finish status.

Subclasses may choose whatever signature is appropriate, or may not implement this at all.
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