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d d YZ d d d YZ d d d YZ e d Z d d d YZ e d Z d S( s) Basic classes and interfaces for journal.i( t
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implementst Interfacet Journalc B sD e Z d Z d Z d Z d Z d Z d Z d Z RS( s} All commands to the system get routed through here.
Subclasses should implement the actual snapshotting capability.
c C s( | | _ | | _ | j j | _ d S( N( t logt journaledServicet getCurrentIndext latestIndex( t selfR R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt __init__ s c C s\ | j } | | j k rX x: | j j | d D] \ } } | j | j | q2 Wn d S( s 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.
i N( t getLastSnapshotR R t getCommandsSincet executeR ( R t
snapshotIndext cmdtimet command( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt
updateFromLog$ s #c C s; t j } | j j | | } | j | j | | | S( s Log and execute a command.( t timeR t
logCommandt addCallbackt _reallyExecute( R R t runTimet d( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt executeCommand/ s c C s" | j | j | } | | _ | S( s- Callback called when logging command is done.( R R R ( R t indexR R t result( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR 6 s c C s
t d S( s0 Return command index of the last snapshot taken.N( t NotImplementedError( R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR
< s c O s
t d S( s Save journal to disk, returns Deferred of finish status.
Subclasses may choose whatever signature is appropriate, or may
not implement this at all.
N( R ( R t argst kwargs( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt sync@ s ( t __name__t
__module__t __doc__R R R R R
R ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR s t
MemoryJournalc B s) e Z d Z d Z d Z d Z RS( s6 Prevayler-like journal that dumps from memory to disk.c C s | | _ t j j | r| y% t j t | d \ | _ } Wn, t t t j f k
rn d \ | _ } n X| | n d | _ | d t j | | | d S( Nt rbi ( i N(
t patht ost existst picklet loadt opent lastSynct IOErrort OSErrort UnpicklingErrort NoneR R ( R R R R# t loadedCallbackt obj( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR M s %
c C s | j S( N( R) ( R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR
Z s c C sH t | j d } t j | j | f | d | j | j | _ d S( Nt wbi ( R( R# R& t dumpR t closeR) ( R R/ t f( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR ] s
( R R R R R
R ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR! J s
t ICommandc B s e Z d Z d Z RS( s@ A serializable command which interacts with a journaled service.c C s d S( s" Run the command and return result.N( ( R R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR h s ( R R R R ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR4 e s t ICommandLogc B s) e Z d Z d Z d Z d Z RS( s Interface for command log.c C s d S( s` Add a command and its run time to the log.
@return: Deferred of command index.
N( ( R R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR o s c C s d S( s- Return index of last command that was logged.N( ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR u s c C s d S( s Return commands who's index >= the given one.
@return: list of (time, command) tuples, sorted with ascending times.
N( ( R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR x s ( R R R R R R ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR5 l s t LoadingServicec B s e Z d Z d Z RS( s7 Base class for journalled service used with Wrappables.c C s
t d S( s' Return object of specified type and id.N( R ( R t objTypet objId( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt
loadObject s ( R R R R9 ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR6 s t Wrappablec B s e Z d Z d Z d Z RS( s0 Base class for objects used with LoadingService.c C s
t d S( s5 Return uid for loading with LoadingService.loadObjectN( R ( R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt getUid s N( R R R R- t
objectTypeR; ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR: s t WrapperCommandc B s3 e Z e e d i d Z d Z d Z RS( c C sC | | _ | j | _ | j | _ | | _ | | _ | | _ d S( N( R/ R; R8 R< R7 t
methodNameR R ( R R> R/ R R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR s c C sR t | d s* | j | j | j } n | j } t | | j | j | j S( NR/ ( t hasattrR9 R7 R8 R/ t getattrR> R R ( R t svct commandTimeR/ ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR s c C s | j j } | d =| S( NR/ ( t __dict__t copy( R R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt __getstate__ s ( ( R R R R4 R R RE ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR= s
c s f d } | S( s Wrap a method so it gets turned into command automatically.
For use with Wrappables.
Usage::
| class Foo(Wrappable):
| objectType = "foo"
| def getUid(self):
| return self.id
| def _bar(self, x):
| return x + 1
|
| bar = command('_bar')
The resulting callable will have signature identical to wrapped
function, except that it expects journal as first argument, and
returns a Deferred.
c s | j | | | S( N( R ( R/ t journalR R ( R> t cmdClass( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt wrapper s ( ( R> RG RH ( ( RG R> sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR s t ServiceWrapperCommandc B s< e Z e e d i d Z d Z d Z d Z RS( c C s | | _ | | _ | | _ d S( N( R> R R ( R R> R R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR s c C s t | | j | j | j S( N( R@ R> R R ( R RA RB ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyR s c C s d | j | j | j f S( Ns# <ServiceWrapperCommand: %s, %s, %s>( R> R R ( R ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt __repr__ s c C s* t | d r" t | j | j Sd Sd S( NRC i ( R? t cmpRC ( R t other( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt __cmp__ s ( ( R R R R4 R R RJ RM ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyRI s
c s f d } | S( s Wrap methods into commands for a journalled service.
The resulting callable will have signature identical to wrapped
function, except that it expects journal as first argument, and
returns a Deferred.
c s | j | | S( N( R ( R/ RF R R ( R> RG ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyRH s ( ( R> RG RH ( ( RG R> sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt serviceCommand s ( ( ( ( ( ( R t
__future__R R$ R t cPickleR& t ImportErrort zope.interfaceR R R R! R4 R5 R6 R: R= R RI RN ( ( ( sB /usr/lib/python2.7/dist-packages/twisted/persisted/journal/base.pyt <module> s"
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