def delete_data(self, varname: str):
with self.metadataset.lock_data(varname):
if varname not in self.varset:
raise NotFoundError(f'{varname} not found')
self.recyclebin.discard(varname, self.varset[varname])
self.varset.pop(varname)
self.metadataset.delete_data(varname)
def delete_data(self, key: str, provider='unknown'):
with self.metadataset.lock_data(key):
if key not in self.varset:
raise NotFoundError(f'{key} not found')
self.recyclebin.discard(key, self.varset[key])
self.varset.pop(key)
self.metadataset.delete_data(key)
def modify_data(self, key: str, modified_by: str):
if key not in self:
raise NotFoundError(f'no such data {key}')
info = self[key]
info['modification_time'].append(time.time())
info['modified_by'].append(modified_by)
info['synchronised'] = False
info['deleted'] = False
def read_data(self, key: str) -> dict:
with self.metadataset.lock_data(key):
if key not in self.metadataset or self.metadataset[key]['deleted']:
raise NotFoundError(f'{key} not found')
metadata = self.metadataset[key]
if not metadata['synchronised']:
data = self.converter.convert_to_data(
self.varset.get_var(key))
self.dataset.synchronise(key, data)
self.metadataset.synchronise_data(key)
return self.dataset.read(key)
def restore(self, index: int, var_to_discard=None) -> tuple:
# for the case where variables with same name
# exist in workspace and recycle bin, if you
# restore the variable in recycle bin, you have
# to discard the variable in the workspace
if index >= len(self):
raise NotFoundError(f'{index} out of limit')
varname, var_to_restore = self[index]
self.pop(index)
if var_to_discard is not None:
self.discard(varname, var_to_discard)
return varname, var_to_restore
def read_data(self, varname: str) -> dict:
with self.metadataset.lock_data(varname):
if varname not in self.metadataset or self.metadataset[varname][
'deleted']:
raise NotFoundError(f'{varname} not found')
metadata = self.metadataset[varname]
if not metadata['synchronised']:
data = self.converter.convert_to_data(
self.varset.get_var(varname))
self.dataset.synchronise(varname, data)
self.metadataset.synchronise_data(varname)
return self.dataset.read(varname)
def redo(self, key):
with self.metadataset.lock_data(key):
if key not in self.historyset:
raise NotFoundError(f'{key} has no history')
variable = self.historyset.stepforward(key)
self.varset.set_var(key, variable)
def cancel(self, key):
with self.metadataset.lock_data(key):
if key not in self.historyset:
raise NotFoundError(f'{key} has no history')
variable = self.historyset.stepback(key, self.varset[key])
self.varset.set_var(key, variable)
def get_var(self, varname: str):
if varname not in self.varset:
raise NotFoundError(f'{varname} not found')
return self.varset[varname]
def update(self, key: str, **info):
if key not in self or self[key]['deleted']:
raise NotFoundError(f'no such data {key}')
self[key].update(info)
def synchronise_data(self, key: str):
if key not in self or self[key]['deleted']:
raise NotFoundError(f'no such data {key}')
self[key]['synchronised'] = True
def restore_data(self, key: str):
if key not in self:
raise NotFoundError(f'no such data {key}')
self[key]['deleted'] = False
def get_data_info(self, key: str) -> dict:
if key not in self.metadataset:
raise NotFoundError(f'{key} not found')
return self.metadataset[key]
def get_data_info(self, varname: str) -> dict:
if varname not in self.metadataset:
raise NotFoundError(f'{varname} not found')
return self.metadataset[varname]
def stepforward(self, key: str):
if key not in self:
raise NotFoundError(f'{key} not found in history')
history = self[key]
return history.stepforward()
def stepback(self, key: str, var):
if key not in self:
raise NotFoundError(f'{key} not found in history')
history = self[key]
return history.stepback(var)
def cancel(self, varname):
with self.metadataset.lock_data(varname):
if varname not in self.historyset:
raise NotFoundError(f'{varname} has no history')
variable = self.historyset.stepback(varname, self.varset[varname])
self.varset.set_var(varname, variable)
def update_data_info(self, varname: str, **info):
with self.metadataset.lock_data(varname):
if varname not in self.metadataset:
raise NotFoundError(f'{varname} not found')
self.metadataset.update(varname, **info)
def get_var(self, key: str):
if key not in self.varset:
raise NotFoundError(f'{key} not found')
return self.varset[key]
def get_varname(self, index: int):
if index >= len(self):
raise NotFoundError(f'{index} out of limit')
return self[index][0]
def update_data_info(self, key: str, **info):
with self.metadataset.lock_data(key):
if key not in self.metadataset:
raise NotFoundError(f'{key} not found')
self.metadataset.update(key, **info)
def redo(self, varname):
with self.metadataset.lock_data(varname):
if varname not in self.historyset:
raise NotFoundError(f'{varname} has no history')
variable = self.historyset.stepforward(varname)
self.varset.set_var(varname, variable)