Page MenuHomec4science
Files F77155465

zeoobject.py
No OneTemporary
Actions

File Metadata

Created
Mon, Aug 12, 19:06

zeoobject.py
View Options

#!/usr/bin/env python3
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
################################################################
from . import bdlogging
from . import lowercase_btree
################################################################
import copy
import re
import sys
import persistent
import transaction
from ZODB.POSException import ConflictError
################################################################
print = bdlogging.invalidPrint
logger = bdlogging.getLogger(__name__)
BTree = lowercase_btree._LowerCaseBTree
PBTree = lowercase_btree.PersistentLowerCaseBTree
################################################################
def _transaction(foo):
def _protected_transation(self, *args, **kwargs):
saved_state = self.__getstate__()
max_attempts = 10
attempts = 0
while True:
try:
foo(self, *args, **kwargs)
except ConflictError as e:
# logger.error('***************CONFLICT************')
transaction.abort()
new_state = self.__getstate__()
found_diff = False
for k, v in saved_state.items():
if k in ['types', 'quantities']:
continue
if k in new_state and v != new_state[k]:
logger.error(
f'attempt {attempts} diff state for key {k}: {v} != {new_state[k]}')
found_diff = True
attempts += 1
if found_diff:
raise e
if attempts == max_attempts:
raise e
else:
break
return _protected_transation
class ZEOObject(persistent.Persistent, BTree):
" The generic object related to entries in the database "
def commit(self):
from .base_zeo import BaseZEO
BaseZEO.singleton_base.commit()
def __setattr__(self, attr, value):
BTree.__setattr__(self, attr, value)
def setFields(self, constraints):
for cons in constraints:
_regex = "(\w*)\s*=\s*(.*)"
match = re.match(_regex, cons)
if (not match or (not len(match.groups()) == 2)):
print("malformed assignment: " + cons)
sys.exit(-1)
key = match.group(1).lower().strip()
val = match.group(2)
if key not in self.types:
print("unknown key '{0}'".format(key))
print("possible keys are:")
for k in self.types.keys():
print("\t" + k)
sys.exit(-1)
val = self.types[key](val)
self.entries[key] = val
def __init__(self, base):
persistent.Persistent.__init__(self)
BTree.__init__(self)
super().__init__()
self.allowNull = {}
self.types = PBTree()
self.operators = {}
def __getstate__(self):
"Get the state of the object for a pickling operations"
state = {}
for k in self.__dict__.keys():
if k == 'base':
continue
state[k] = self.__dict__[k]
return state
_flag_debug = False
def __setstate__(self, state):
for k in state.keys():
self.__dict__[k] = state[k]
if self._flag_debug:
raise
def copy(self):
return copy.deepcopy(self)
def __deepcopy__(self, memo):
from . import base_zeo
_cp = type(self)(base_zeo.BaseZEO.singleton_base)
for k in self.__dict__.keys():
if k == 'base':
continue
_cp.__dict__[k] = copy.deepcopy(self.__dict__[k])
return _cp
@_transaction
def update(self):
from .base_zeo import BaseZEO
if isinstance(self, BaseZEO.singleton_base.Job):
obj_list = BaseZEO.singleton_base._get_jobs()
elif isinstance(self, BaseZEO.singleton_base.Run):
obj_list = BaseZEO.singleton_base._get_runs()
else:
raise RuntimeError("undefined yet")
obj = obj_list[self.id]
# logger.error(self.base)
# logger.error(obj)
for key, value in self.entries.items():
# logger.error(f'update {key}: {obj[key]} -> value')
obj[key] = value
BaseZEO.singleton_base.commit()
def createTableRequest(self):
self.base.root.schemas[self.base.schema]['default_job'] = self
def matchConstraint(self, constraint):
# case it is an object of same type
if isinstance(constraint, type(self)):
for key, value in self.items():
if constraint[key] != value:
return False
return True
# case it is a list/dict of constraints to evaluate
else:
logger.error(type(self))
logger.error(constraint)
for key, value in self.items():
if key not in constraint:
continue
if constraint[key] != value:
return False
return True
raise RuntimeError("toimplement")
def getMatchedObjectList(self):
from .base_zeo import BaseZEO
return BaseZEO.singleton_base.select(self, self)
def __repr__(self):
type_prefix = 'object:\n'
entries = self.entries
keys = set(self.entries.keys())
keys.remove('id')
if not len(keys):
type_prefix = 'descriptor:\n'
entries = self.types
if not len(entries.keys()):
return "Empty ZEO object"
outputs = []
for k, v in sorted(entries.items()):
if k == 'id' and v is None:
continue
outputs += [' ' + k + ": " + str(v)]
return type(self).__name__ + ' ' + type_prefix + "\n".join(outputs)

Event Timeline

c4science · Help