import logging
from osm_common.dbbase import DbException, DbBase
+from osm_common.dbmongo import deep_update
from http import HTTPStatus
from uuid import uuid4
from copy import deepcopy
class DbMemory(DbBase):
- def __init__(self, logger_name='db'):
- super().__init__(logger_name)
+ def __init__(self, logger_name='db', lock=False):
+ super().__init__(logger_name, lock)
self.db = {}
def db_connect(self, config):
"""
if "logger_name" in config:
self.logger = logging.getLogger(config["logger_name"])
- self.master_password = config.get("masterpassword")
+ master_key = config.get("commonkey") or config.get("masterpassword")
+ if master_key:
+ self.set_secret_key(master_key)
@staticmethod
def _format_filter(q_filter):
- return q_filter # TODO
+ db_filter = {}
+ # split keys with ANYINDEX in this way:
+ # {"A.B.ANYINDEX.C.D.ANYINDEX.E": v } -> {"A.B.ANYINDEX": {"C.D.ANYINDEX": {"E": v}}}
+ if q_filter:
+ for k, v in q_filter.items():
+ db_v = v
+ kleft, _, kright = k.rpartition(".ANYINDEX.")
+ while kleft:
+ k = kleft + ".ANYINDEX"
+ db_v = {kright: db_v}
+ kleft, _, kright = k.rpartition(".ANYINDEX.")
+ deep_update(db_filter, {k: db_v})
+
+ return db_filter
def _find(self, table, q_filter):
+
+ def recursive_find(key_list, key_next_index, content, oper, target):
+ if key_next_index == len(key_list) or content is None:
+ try:
+ if oper in ("eq", "cont"):
+ if isinstance(target, list):
+ if isinstance(content, list):
+ return any(content_item in target for content_item in content)
+ return content in target
+ elif isinstance(content, list):
+ return target in content
+ else:
+ return content == target
+ elif oper in ("neq", "ne", "ncont"):
+ if isinstance(target, list):
+ if isinstance(content, list):
+ return all(content_item not in target for content_item in content)
+ return content not in target
+ elif isinstance(content, list):
+ return target not in content
+ else:
+ return content != target
+ if oper == "gt":
+ return content > target
+ elif oper == "gte":
+ return content >= target
+ elif oper == "lt":
+ return content < target
+ elif oper == "lte":
+ return content <= target
+ else:
+ raise DbException("Unknown filter operator '{}' in key '{}'".
+ format(oper, ".".join(key_list)), http_code=HTTPStatus.BAD_REQUEST)
+ except TypeError:
+ return False
+
+ elif isinstance(content, dict):
+ return recursive_find(key_list, key_next_index + 1, content.get(key_list[key_next_index]), oper,
+ target)
+ elif isinstance(content, list):
+ look_for_match = True # when there is a match return immediately
+ if (target is None) != (oper in ("neq", "ne", "ncont")): # one True and other False (Xor)
+ look_for_match = False # when there is not a match return immediately
+
+ for content_item in content:
+ if key_list[key_next_index] == "ANYINDEX" and isinstance(v, dict):
+ matches = True
+ for k2, v2 in target.items():
+ k_new_list = k2.split(".")
+ new_operator = "eq"
+ if k_new_list[-1] in ("eq", "ne", "gt", "gte", "lt", "lte", "cont", "ncont", "neq"):
+ new_operator = k_new_list.pop()
+ if not recursive_find(k_new_list, 0, content_item, new_operator, v2):
+ matches = False
+ break
+
+ else:
+ matches = recursive_find(key_list, key_next_index, content_item, oper, target)
+ if matches == look_for_match:
+ return matches
+ if key_list[key_next_index].isdecimal() and int(key_list[key_next_index]) < len(content):
+ matches = recursive_find(key_list, key_next_index + 1, content[int(key_list[key_next_index])],
+ oper, target)
+ if matches == look_for_match:
+ return matches
+ return not look_for_match
+ else: # content is not dict, nor list neither None, so not found
+ if oper in ("neq", "ne", "ncont"):
+ return target is not None
+ else:
+ return target is None
+
for i, row in enumerate(self.db.get(table, ())):
- match = True
- if q_filter:
- for k, v in q_filter.items():
- if k not in row or v != row[k]:
- match = False
- if match:
+ q_filter = q_filter or {}
+ for k, v in q_filter.items():
+ k_list = k.split(".")
+ operator = "eq"
+ if k_list[-1] in ("eq", "ne", "gt", "gte", "lt", "lte", "cont", "ncont", "neq"):
+ operator = k_list.pop()
+ matches = recursive_find(k_list, 0, row, operator, v)
+ if not matches:
+ break
+ else:
+ # match
yield i, row
def get_list(self, table, q_filter=None):
"""
try:
result = []
- for _, row in self._find(table, self._format_filter(q_filter)):
- result.append(deepcopy(row))
+ with self.lock:
+ for _, row in self._find(table, self._format_filter(q_filter)):
+ result.append(deepcopy(row))
return result
except DbException:
raise
except Exception as e: # TODO refine
raise DbException(str(e))
+ def count(self, table, q_filter=None):
+ """
+ Count the number of entries matching q_filter
+ :param table: collection or table
+ :param q_filter: Filter
+ :return: number of entries found (can be zero)
+ :raise: DbException on error
+ """
+ try:
+ with self.lock:
+ return sum(1 for x in self._find(table, self._format_filter(q_filter)))
+ except DbException:
+ raise
+ except Exception as e: # TODO refine
+ raise DbException(str(e))
+
def get_one(self, table, q_filter=None, fail_on_empty=True, fail_on_more=True):
"""
Obtain one entry matching q_filter
"""
try:
result = None
- for _, row in self._find(table, self._format_filter(q_filter)):
- if not fail_on_more:
- return deepcopy(row)
- if result:
- raise DbException("Found more than one entry with filter='{}'".format(q_filter),
- HTTPStatus.CONFLICT.value)
- result = row
+ with self.lock:
+ for _, row in self._find(table, self._format_filter(q_filter)):
+ if not fail_on_more:
+ return deepcopy(row)
+ if result:
+ raise DbException("Found more than one entry with filter='{}'".format(q_filter),
+ HTTPStatus.CONFLICT.value)
+ result = row
if not result and fail_on_empty:
raise DbException("Not found entry with filter='{}'".format(q_filter), HTTPStatus.NOT_FOUND)
return deepcopy(result)
"""
try:
id_list = []
- for i, _ in self._find(table, self._format_filter(q_filter)):
- id_list.append(i)
+ with self.lock:
+ for i, _ in self._find(table, self._format_filter(q_filter)):
+ id_list.append(i)
deleted = len(id_list)
for i in reversed(id_list):
del self.db[table][i]
:return: Dict with the number of entries deleted
"""
try:
- for i, _ in self._find(table, self._format_filter(q_filter)):
- break
- else:
- if fail_on_empty:
- raise DbException("Not found entry with filter='{}'".format(q_filter), HTTPStatus.NOT_FOUND)
- return None
- del self.db[table][i]
+ with self.lock:
+ for i, _ in self._find(table, self._format_filter(q_filter)):
+ break
+ else:
+ if fail_on_empty:
+ raise DbException("Not found entry with filter='{}'".format(q_filter), HTTPStatus.NOT_FOUND)
+ return None
+ del self.db[table][i]
return {"deleted": 1}
except Exception as e: # TODO refine
raise DbException(str(e))
+ def set_one(self, table, q_filter, update_dict, fail_on_empty=True, unset=None, pull=None, push=None):
+ """
+ Modifies an entry at database
+ :param table: collection or table
+ :param q_filter: Filter
+ :param update_dict: Plain dictionary with the content to be updated. It is a dot separated keys and a value
+ :param fail_on_empty: If nothing matches filter it returns None unless this flag is set tu True, in which case
+ it raises a DbException
+ :param unset: Plain dictionary with the content to be removed if exist. It is a dot separated keys, value is
+ ignored. If not exist, it is ignored
+ :param pull: Plain dictionary with the content to be removed from an array. It is a dot separated keys and value
+ if exist in the array is removed. If not exist, it is ignored
+ :param push: Plain dictionary with the content to be appended to an array. It is a dot separated keys and value
+ is appended to the end of the array
+ :return: Dict with the number of entries modified. None if no matching is found.
+ """
+ try:
+ with self.lock:
+ for i, db_item in self._find(table, self._format_filter(q_filter)):
+ break
+ else:
+ if fail_on_empty:
+ raise DbException("Not found entry with _id='{}'".format(q_filter), HTTPStatus.NOT_FOUND)
+ return None
+ for k, v in update_dict.items():
+ db_nested = db_item
+ k_list = k.split(".")
+ k_item_prev = k_list[0]
+ for k_item in k_list[1:]:
+ if isinstance(db_nested[k_item_prev], dict):
+ if k_item not in db_nested[k_item_prev]:
+ db_nested[k_item_prev][k_item] = None
+ elif isinstance(db_nested[k_item_prev], list) and k_item.isdigit():
+ # extend list with Nones if index greater than list
+ k_item = int(k_item)
+ if k_item >= len(db_nested[k_item_prev]):
+ db_nested[k_item_prev] += [None] * (k_item - len(db_nested[k_item_prev]) + 1)
+ elif db_nested[k_item_prev] is None:
+ db_nested[k_item_prev] = {k_item: None}
+ else: # number, string, boolean, ... or list but with not integer key
+ raise DbException("Cannot set '{}' on existing '{}={}'".format(k, k_item_prev,
+ db_nested[k_item_prev]))
+
+ db_nested = db_nested[k_item_prev]
+ k_item_prev = k_item
+
+ db_nested[k_item_prev] = v
+ return {"updated": 1}
+ except DbException:
+ raise
+ except Exception as e: # TODO refine
+ raise DbException(str(e))
+
def replace(self, table, _id, indata, fail_on_empty=True):
"""
Replace the content of an entry
:return: Dict with the number of entries replaced
"""
try:
- for i, _ in self._find(table, self._format_filter({"_id": _id})):
- break
- else:
- if fail_on_empty:
- raise DbException("Not found entry with _id='{}'".format(_id), HTTPStatus.NOT_FOUND)
- return None
- self.db[table][i] = deepcopy(indata)
+ with self.lock:
+ for i, _ in self._find(table, self._format_filter({"_id": _id})):
+ break
+ else:
+ if fail_on_empty:
+ raise DbException("Not found entry with _id='{}'".format(_id), HTTPStatus.NOT_FOUND)
+ return None
+ self.db[table][i] = deepcopy(indata)
return {"updated": 1}
except DbException:
raise
if not id:
id = str(uuid4())
indata["_id"] = id
- if table not in self.db:
- self.db[table] = []
- self.db[table].append(deepcopy(indata))
+ with self.lock:
+ if table not in self.db:
+ self.db[table] = []
+ self.db[table].append(deepcopy(indata))
return id
except Exception as e: # TODO refine
raise DbException(str(e))
+ def create_list(self, table, indata_list):
+ """
+ Add a new entry at database
+ :param table: collection or table
+ :param indata_list: list content to be added
+ :return: database ids of the inserted element. Raises a DbException on error
+ """
+ try:
+ _ids = []
+ with self.lock:
+ for indata in indata_list:
+ _id = indata.get("_id")
+ if not _id:
+ _id = str(uuid4())
+ indata["_id"] = _id
+ with self.lock:
+ if table not in self.db:
+ self.db[table] = []
+ self.db[table].append(deepcopy(indata))
+ _ids.append(_id)
+ return _ids
+ except Exception as e: # TODO refine
+ raise DbException(str(e))
+
if __name__ == '__main__':
# some test code
projects / osm / common.git / blobdiff