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7 Commits
Author | SHA1 | Date |
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lash | 46d83f2cb9 | |
lash | 765d634d5c | |
lash | ee6820ef60 | |
lash | 1951fcda8a | |
lash | 440fab9e70 | |
lash | b53b729ea1 | |
lash | 714bf79d22 |
14
CHANGELOG
14
CHANGELOG
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@ -1,3 +1,17 @@
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- 0.2.10
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* Add count active states method
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* Enable complete replace of NEW state on state instantiation
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- 0.2.9
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* Enable access to is_pure method
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* Numeric option for elements return value
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- 0.2.8
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* Remove sync on persist set
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- 0.2.7
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* Handle missing files in fs readdir list
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- 0.2.6
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* Ensure atomic state lock in fs
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- 0.2.5
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* Correct handling of persistent sync when no not-state filter has been set
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- 0.2.4
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* Add optional concurrency lock for persistence store, implemented for file store
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- 0.2.3
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@ -1,6 +1,6 @@
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[metadata]
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name = shep
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version = 0.2.4
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version = 0.2.10
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description = Multi-state key stores using bit masks
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author = Louis Holbrook
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author_email = dev@holbrook.no
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@ -20,8 +20,8 @@ class PersistedState(State):
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:type logger: object
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"""
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def __init__(self, factory, bits, logger=None, verifier=None, check_alias=True, event_callback=None):
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super(PersistedState, self).__init__(bits, logger=logger, verifier=verifier, check_alias=check_alias, event_callback=event_callback)
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def __init__(self, factory, bits, logger=None, verifier=None, check_alias=True, event_callback=None, default_state=None):
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super(PersistedState, self).__init__(bits, logger=logger, verifier=verifier, check_alias=check_alias, event_callback=event_callback, default_state=default_state)
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self.__store_factory = factory
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self.__stores = {}
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@ -69,7 +69,7 @@ class PersistedState(State):
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super(PersistedState, self).unset(key, or_state, allow_base=True)
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raise e
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self.sync(to_state)
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#self.sync(to_state)
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return to_state
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@ -144,7 +144,7 @@ class PersistedState(State):
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return to_state
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def sync(self, state=None):
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def sync(self, state=None, not_state=None):
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"""Reload resources for a single state in memory from the persisted state store.
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:param state: State to load
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@ -153,11 +153,19 @@ class PersistedState(State):
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# :todo: if sync state is none, sync all
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"""
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states = []
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states_numeric = []
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if state == None:
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states = list(self.all())
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states_numeric = list(self.all(numeric=True))
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else:
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states = [self.name(state)]
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states_numeric = [state]
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states = []
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for state in states_numeric:
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if not_state != None:
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if state & not_state == 0:
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states.append(self.name(state))
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else:
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states.append(self.name(state))
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ks = []
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for k in states:
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@ -30,16 +30,22 @@ class State:
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base_state_name = 'NEW'
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def __init__(self, bits, logger=None, verifier=None, check_alias=True, event_callback=None):
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def __init__(self, bits, logger=None, verifier=None, check_alias=True, event_callback=None, default_state=None):
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self.__initial_bits = bits
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self.__bits = bits
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self.__limit = (1 << bits) - 1
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self.__c = 0
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setattr(self, self.base_state_name, 0)
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self.__reverse = {0: getattr(self, self.base_state_name)}
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self.__keys = {getattr(self, self.base_state_name): []}
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if default_state == None:
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default_state = self.base_state_name
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setattr(self, default_state, 0)
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self.__reverse = {0: getattr(self, default_state)}
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self.__keys = {getattr(self, default_state): []}
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self.__keys_reverse = {}
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if default_state != self.base_state_name:
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self.__keys_reverse[default_state] = 0
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self.__contents = {}
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self.modified_last = {}
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self.verifier = verifier
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@ -53,7 +59,7 @@ class State:
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# return true if v is a single-bit state
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def __is_pure(self, v):
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def is_pure(self, v):
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if v == 0:
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return True
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c = 1
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@ -139,7 +145,7 @@ class State:
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def __add_state_list(self, state, item):
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if self.__keys.get(state) == None:
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self.__keys[state] = []
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if not self.__is_pure(state) or state == 0:
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if not self.is_pure(state) or state == 0:
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self.__keys[state].append(item)
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c = 1
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for i in range(self.__bits):
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@ -196,7 +202,7 @@ class State:
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for a in args:
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a = self.__check_value_cursor(a)
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v = self.__check_limit(v | a, pure=False)
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if self.__is_pure(v):
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if self.is_pure(v):
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raise ValueError('use add to add pure values')
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return self.__set(k, v)
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@ -217,36 +223,49 @@ class State:
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return self.__alias(k, *args)
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def all(self, pure=False):
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"""Return list of all unique atomic and alias states.
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def all(self, pure=False, numeric=False):
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"""Return list of all unique atomic and alias state strings.
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:rtype: list of ints
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:return: states
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"""
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l = []
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for k in dir(self):
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state = None
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if k[0] == '_':
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continue
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if k.upper() != k:
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continue
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if pure:
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state = self.from_name(k)
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if not self.__is_pure(state):
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if not self.is_pure(state):
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continue
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l.append(k)
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if numeric:
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if state == None:
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state = self.from_name(k)
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l.append(state)
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else:
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l.append(k)
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l.sort()
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return l
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def elements(self, v):
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def elements(self, v, numeric=False, as_string=True):
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r = []
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if v == None or v == 0:
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return self.base_state_name
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c = 1
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for i in range(self.__bits):
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if v & c > 0:
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r.append(self.name(c))
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if numeric:
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r.append(c)
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else:
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r.append(self.name(c))
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c <<= 1
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if numeric or not as_string:
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return r
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return '_' + '.'.join(r)
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@ -427,7 +446,7 @@ class State:
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:rtype: int
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:returns: Resulting state
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"""
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if not self.__is_pure(or_state):
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if not self.is_pure(or_state):
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raise ValueError('can only apply using single bit states')
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current_state = self.__keys_reverse.get(key)
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@ -457,7 +476,7 @@ class State:
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:rtype: int
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:returns: Resulting state
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"""
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if not self.__is_pure(not_state):
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if not self.is_pure(not_state):
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raise ValueError('can only apply using single bit states')
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current_state = self.__keys_reverse.get(key)
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@ -573,7 +592,7 @@ class State:
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state = self.__keys_reverse.get(key)
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if state == None:
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raise StateItemNotFound(key)
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if not self.__is_pure(state):
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if not self.is_pure(state):
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raise StateInvalid('cannot run next on an alias state')
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if state == 0:
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@ -628,3 +647,27 @@ class State:
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statemask = ~statemask
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statemask &= self.__limit
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return statemask
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def purge(self, key):
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state = self.state(key)
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state_name = self.name(state)
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v = self.__keys.get(state)
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v.remove(key)
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del self.__keys_reverse[key]
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try:
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del self.__contents[key]
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except KeyError:
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pass
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try:
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del self.modified_last[key]
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except KeyError:
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pass
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def count(self):
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return self.__c
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@ -28,22 +28,17 @@ class SimpleFileStore:
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os.makedirs(lock_path, exist_ok=True)
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def __is_locked(self, k):
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if self.__lock_path == None:
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return False
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for v in os.listdir(self.__lock_path):
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if k == v:
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return True
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return False
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def __lock(self, k):
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if self.__lock_path == None:
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return
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if self.__is_locked(k):
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raise StateLockedKey(k)
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fp = os.path.join(self.__lock_path, k)
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f = open(fp, 'w')
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f = None
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try:
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f = open(fp, 'x')
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except FileExistsError:
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pass
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if f == None:
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raise StateLockedKey(k)
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f.close()
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@ -120,7 +115,11 @@ class SimpleFileStore:
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files = []
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for p in os.listdir(self.__path):
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fp = os.path.join(self.__path, p)
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f = open(fp, self.__m[0])
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f = None
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try:
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f = open(fp, self.__m[0])
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except FileNotFoundError:
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continue
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r = f.read()
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f.close()
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if len(r) == 0:
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@ -7,6 +7,7 @@ from shep import State
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from shep.error import (
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StateExists,
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StateInvalid,
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StateItemNotFound,
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)
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logging.basicConfig(level=logging.DEBUG)
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@ -250,5 +251,76 @@ class TestState(unittest.TestCase):
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self.assertEqual(mask, states.ALL)
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def test_remove(self):
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states = State(1)
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states.add('foo')
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states.put('xyzzy', contents='plugh')
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v = states.get('xyzzy')
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self.assertEqual(v, 'plugh')
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states.next('xyzzy')
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v = states.state('xyzzy')
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self.assertEqual(states.FOO, v)
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states.purge('xyzzy')
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with self.assertRaises(StateItemNotFound):
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states.state('xyzzy')
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def test_elements(self):
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states = State(2)
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states.add('foo')
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states.add('bar')
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states.alias('baz', states.FOO, states.BAR)
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v = states.elements(states.BAZ)
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self.assertIn('FOO', v)
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self.assertIn('BAR', v)
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self.assertIsInstance(v, str)
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v = states.elements(states.BAZ, numeric=True)
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self.assertIn(states.FOO, v)
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self.assertIn(states.BAR, v)
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v = states.elements(states.BAZ, as_string=False)
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self.assertIn('FOO', v)
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self.assertIn('BAR', v)
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self.assertNotIsInstance(v, str)
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self.assertIsInstance(v, list)
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def test_count(self):
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states = State(3)
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states.add('foo')
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states.add('bar')
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self.assertEqual(states.count(), 2)
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states.add('baz')
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self.assertEqual(states.count(), 3)
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def test_pure(self):
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states = State(2)
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states.add('foo')
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states.add('bar')
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states.alias('baz', states.FOO, states.BAR)
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v = states.is_pure(states.BAZ)
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self.assertFalse(v)
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v = states.is_pure(states.FOO)
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self.assertTrue(v)
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def test_default(self):
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states = State(2, default_state='FOO')
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with self.assertRaises(StateItemNotFound):
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states.state('NEW')
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getattr(states, 'FOO')
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states.state('FOO')
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if __name__ == '__main__':
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unittest.main()
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