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PickleBackendt BPickleBackendt path_string_to_tuplet path_tuple_to_stringt
RootedPersistt PersistErrort PersistReadOnlyErrorc B s e Z RS( ( t __name__t
__module__( ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR # s c B s e Z RS( ( R R ( ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR ' s c B s" e Z d Z d d d Z d Z d Z d Z e e e Z e e Z
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Z e e d Z e e e d Z e e e d Z e e d Z d Z RS( s Persist a hierarchical database of key=>value pairs.
There are three different kinds of option maps, regarding the
persistence and priority that maps are queried.
- hard - Options are persistent.
- soft - Options are not persistent, and have a higher priority
than persistent options.
- weak - Options are not persistent, and have a lower priority
than persistent options.
@ivar filename: The name of the file where persist data is saved
or None if no filename is available.
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@param backend: The backend to use. If none is specified,
L{BPickleBackend} will be used.
@param filename: The default filename to save to and load from. If
specified, and the file exists, it will be immediately
loaded. Specifying this will also allow L{save} to be called
without any arguments to save the persist.
N( t NoneR t _backendt newt _hardmapt _softmapt _weakmapt Falset _readonlyt _modifiedt _configt filenamet ost patht existst load( t selft backendR ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyt __init__= s c C s | j S( N( R ( R ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyt
_get_readonlyS s c C s t | | _ d S( N( t boolR ( R t flag( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyt
_set_readonlyV s c C s | j S( N( R ( R ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyt
_get_modifiedY s c C s
t | _ d S( s( Set the database status as non-modified.N( R R ( R ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyt reset_modified_ s c C s | j r t d n d S( sR Assert if the object is writable
@raise: L{PersistReadOnlyError}
s" Configuration is in readonly mode.N( R R ( R ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyt assert_writablec s c s f d } t j j t j j sV | rC d St d n t j j d k ry | d Sy j j _ Wn$ | r d St d n Xd S( s Load a persisted database.c so d } t j j | rk t j j | d k rk y j j | _ Wn t d | n Xt St S( Ns .oldi s Broken configuration file at %s(
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d S( s Save the persist to the given C{filepath}.
If None is specified, then the filename passed during construction will
be used.
If the destination file already exists, it will be renamed
to C{<filepath>.old}.
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rt | d k rbt | d t k rYg } qhi } n | } | j j | | | } | t k rt d t | t | f n | sPn | } | j d } q"W| S( Ni s Can't traverse %r (%r): %rs Can't traverse %r with %r( t NOTHINGR t copyt listt popt gett NotImplementedt lenR t typeR t strt setR% t int(
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R ( R R t softt hardt weakR> t value( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyt _getvalue s c C s| | j | | | | } t } | | k r. t S| | k r> t S| j j | | } | t k rx t d t | n | S( Ns Can't check %r for containment( RG R/ R R% R t hasR4 R R6 ( R R RF RC RD RE R: R> t result( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRH s c C sc | j | | | | } | t k r( g S| j j | } | t k r_ t d t | n | S( Ns Can't return keys for %s( RG R/ R t keysR4 R R6 ( R R RC RD RE R: RI ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRJ s c C s8 | j | | | | } | t k r( | S| j j | S( N( RG R/ R R0 ( R R R; RC RD RE RF ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR3 s c C s | s t t | t k r- t | } n | r? | j } n. | rQ | j } n | j t | _ | j } | j
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Rebase the database hierarchy.
@return: A L{RootedPersist} using this L{Persist} as parent.
( R ( R R ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyt root_atN s N( R R t __doc__R
R R R R t propertyt readonlyt modifiedR! R" R R. R/ RB R RG RH RJ R3 R8 RQ RR RW RX ( ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR + s* + %c B s e Z d Z d Z e d Z e d Z d Z e e e e d Z
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Z e e d Z d Z RS( sx Root a L{Persist}'s tree at a particular branch.
This class shares the same interface of L{Persist} and provides a shortcut
to access the nodes of a particular branch in a L{Persist}'s tree.
The chosen branch will be viewed as the root of the tree of the
L{RootedPersist} and all operations will be forwarded to the parent
L{Persist} as appropriate.
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@param parent: the parent L{Persist}.
@param root: a branch of the parent L{Persist}'s tree, that
will be used as root of this L{RootedPersist}.
N( t parentR6 R7 R t root( R R] R^ ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR b s c C s
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| j j S( N( R] R\ ( R ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR_ o s c C s | j j d S( N( R] R" ( R ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR" q s c C sD t | t k r! t | } n | j j | j | | | | | S( N( R6 R7 R R] RH R^ ( R R RF RC RD RE ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRH t s c C sA t | t k r! t | } n | j j | j | | | | S( N( R6 R7 R R] RJ R^ ( R R RC RD RE ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRJ y s c C sD t | t k r! t | } n | j j | j | | | | | S( N( R6 R7 R R] R3 R^ ( R R R; RC RD RE ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR3 ~ s c C sA t | t k r! t | } n | j j | j | | | | S( N( R6 R7 R R] R8 R^ ( R R RF RC RE ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR8 s c C sD t | t k r! t | } n | j j | j | | | | | S( N( R6 R7 R R] RQ R^ ( R R RF RO RC RE ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRQ s c C sA t | t k r! t | } n | j j | j | | | | S( N( R6 R7 R R] RR R^ ( R R RF RC RE ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRR s c C si t | t k r! t | } n t | t k rB t | } n | j j | j | | j | | | S( N( R6 R7 R R] RW R^ ( R RU RV RC RE ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRW s c C s8 t | t k r! t | } n | j j | j | S( N( R6 R7 R R] RX R^ ( R R ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRX s N( R R RY R RZ R[ R\ R" R/ R RH RJ R
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r t d | q Xq | j | j d d q8 q8 Wt | S( s Convert a L{Persist} path string to a path tuple.
Examples:
>>> path_string_to_tuple("ab")
("ab",)
>>> path_string_to_tuple("ab.cd")
("ab", "cd"))
>>> path_string_to_tuple("ab[0][1]")
("ab", 0, 1)
>>> path_string_to_tuple("ab[0].cd[1]")
("ab", 0, "cd", 1)
Raises L{PersistError} if the given path string is invalid.
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#t Backendc B sk e Z d Z d Z d Z d Z e d Z d Z d Z d Z
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RS( sD
Base class for L{Persist} backends implementing hierarchical storage
functionality.
Each node of the hierarchy is an object of type C{dict}, C{list}
or C{tuple}. A node can have zero or more children, each child can be
another node or a leaf value compatible with the backend's serialization
mechanism.
Each child element is associated with a unique key, that can be used to
get, set or remove the child itself from its containing node. If the node
object is of type C{dict}, then the child keys will be the keys of the
dictionary, otherwise if the node object is of type C{list} or C{tuple}
the child element keys are the indexes of the available items, or the value
of items theselves.
The root node object is always a C{dict}.
For example:
>>> backend = Backend()
>>> root = backend.new()
>>> backend.set(root, "foo", "bar")
'bar'
>>> egg = backend.set(root, "egg", [1, 2, 3])
>>> backend.set(egg, 0, 10)
10
>>> root
{'foo': 'bar', 'egg': [10, 2, 3]}
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rx | } q Xq | | k r | } q | } n t } | S( s( Lookup a child in the given node object.( R6 t dictR3 Rg R1 R9 t
IndexErrorR4 ( R R: R@ t _markerR? ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR3 s
c C s t | t k r# | } | | <n t | t k r t | t k r t | } | | k ru | j d | } n7 | d k r t | | k r | j d d d } n | } | | <n t } | S( s: Set the value of the given child in the given node object.i N(
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c C s t } t | t k r7 | | k r | | =t } q n t | t k r | r t | t k r y | | =t } Wq t k
r q Xq | | k r g | D] } | | k r | ^ q | (t } q n t } | S( s Remove a the given child in the given node object.
@param isvalue: In case the node object is a C{list}, a boolean
indicating if C{elem} is the index of the child or the value
of the child itself.
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& c C s) t | t t f k r% t j | S| S( s Copy a node or a value.( R6 Rm R1 R0 t deepcopy( R RF ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyR0 3 s
c C s | S( s. Whether the given node object has no children.( ( R R: ( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRS 9 s c C s& t | d d } | r" | | St S( s? Whether the given node object contains the given child element.t __contains__N( t getattrR
R4 ( R R: R@ t contains( ( s9 /usr/lib/python2.7/dist-packages/landscape/lib/persist.pyRH = s
c C sE t | d d } | r | St | t k rA t t | St S( s? Return the keys of the child elements of the given node object.RJ N( Rv R
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