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# -*- coding: utf-8 -*- |
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# Copyright 2018 Telefonica S.A. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
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# implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import logging |
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from pymongo import MongoClient, errors |
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from osm_common.dbbase import DbException, DbBase |
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from http import HTTPStatus |
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from time import time, sleep |
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from copy import deepcopy |
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from base64 import b64decode |
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from uuid import uuid4 |
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__author__ = "Alfonso Tierno <alfonso.tiernosepulveda@telefonica.com>" |
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# TODO consider use this decorator for database access retries |
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# @retry_mongocall |
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# def retry_mongocall(call): |
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# def _retry_mongocall(*args, **kwargs): |
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# retry = 1 |
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# while True: |
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# try: |
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# return call(*args, **kwargs) |
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# except pymongo.AutoReconnect as e: |
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# if retry == 4: |
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# raise DbException(e) |
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# sleep(retry) |
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# return _retry_mongocall |
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def deep_update(to_update, update_with): |
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""" |
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Similar to deepcopy but recursively with nested dictionaries. 'to_update' dict is updated with a content copy of |
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'update_with' dict recursively |
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:param to_update: must be a dictionary to be modified |
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:param update_with: must be a dictionary. It is not changed |
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:return: to_update |
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""" |
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for key in update_with: |
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if key in to_update: |
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if isinstance(to_update[key], dict) and isinstance(update_with[key], dict): |
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deep_update(to_update[key], update_with[key]) |
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continue |
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to_update[key] = deepcopy(update_with[key]) |
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return to_update |
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class DbMongo(DbBase): |
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conn_initial_timout = 120 |
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conn_timout = 10 |
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def __init__(self, logger_name='db', lock=False): |
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super().__init__(logger_name, lock) |
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self.client = None |
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self.db = None |
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self.database_key = None |
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self.secret_obtained = False |
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# ^ This is used to know if database serial has been got. Database is inited by NBI, who generates the serial |
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# In case it is not ready when connected, it should be got later on before any decrypt operation |
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def get_secret_key(self): |
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if self.secret_obtained: |
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return |
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self.secret_key = None |
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if self.database_key: |
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self.set_secret_key(self.database_key) |
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version_data = self.get_one("admin", {"_id": "version"}, fail_on_empty=False, fail_on_more=True) |
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if version_data and version_data.get("serial"): |
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self.set_secret_key(b64decode(version_data["serial"])) |
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self.secret_obtained = True |
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def db_connect(self, config, target_version=None): |
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""" |
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Connect to database |
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:param config: Configuration of database |
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:param target_version: if provided it checks if database contains required version, raising exception otherwise. |
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:return: None or raises DbException on error |
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""" |
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try: |
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if "logger_name" in config: |
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self.logger = logging.getLogger(config["logger_name"]) |
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master_key = config.get("commonkey") or config.get("masterpassword") |
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if master_key: |
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self.database_key = master_key |
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self.set_secret_key(master_key) |
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if config.get("uri"): |
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self.client = MongoClient(config["uri"], replicaSet=config.get("replicaset", None)) |
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else: |
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self.client = MongoClient(config["host"], config["port"], replicaSet=config.get("replicaset", None)) |
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# TODO add as parameters also username=config.get("user"), password=config.get("password")) |
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# when all modules are ready |
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self.db = self.client[config["name"]] |
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if "loglevel" in config: |
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self.logger.setLevel(getattr(logging, config['loglevel'])) |
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# get data to try a connection |
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now = time() |
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while True: |
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try: |
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version_data = self.get_one("admin", {"_id": "version"}, fail_on_empty=False, fail_on_more=True) |
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# check database status is ok |
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if version_data and version_data.get("status") != 'ENABLED': |
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raise DbException("Wrong database status '{}'".format(version_data.get("status")), |
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http_code=HTTPStatus.INTERNAL_SERVER_ERROR) |
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# check version |
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db_version = None if not version_data else version_data.get("version") |
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if target_version and target_version != db_version: |
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raise DbException("Invalid database version {}. Expected {}".format(db_version, target_version)) |
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# get serial |
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if version_data and version_data.get("serial"): |
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self.secret_obtained = True |
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self.set_secret_key(b64decode(version_data["serial"])) |
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self.logger.info("Connected to database {} version {}".format(config["name"], db_version)) |
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return |
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except errors.ConnectionFailure as e: |
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if time() - now >= self.conn_initial_timout: |
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raise |
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self.logger.info("Waiting to database up {}".format(e)) |
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sleep(2) |
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except errors.PyMongoError as e: |
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raise DbException(e) |
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@staticmethod |
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def _format_filter(q_filter): |
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""" |
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Translate query string q_filter into mongo database filter |
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:param q_filter: Query string content. Follows SOL005 section 4.3.2 guidelines, with the follow extensions and |
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differences: |
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It accept ".nq" (not equal) in addition to ".neq". |
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For arrays you can specify index (concrete index must match), nothing (any index may match) or 'ANYINDEX' |
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(two or more matches applies for the same array element). Examples: |
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with database register: {A: [{B: 1, C: 2}, {B: 6, C: 9}]} |
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query 'A.B=6' matches because array A contains one element with B equal to 6 |
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query 'A.0.B=6' does no match because index 0 of array A contains B with value 1, but not 6 |
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query 'A.B=6&A.C=2' matches because one element of array matches B=6 and other matchesC=2 |
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query 'A.ANYINDEX.B=6&A.ANYINDEX.C=2' does not match because it is needed the same element of the |
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array matching both |
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Examples of translations from SOL005 to >> mongo # comment |
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A=B; A.eq=B >> A: B # must contain key A and equal to B or be a list that contains B |
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A.cont=B >> A: B |
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A=B&A=C; A=B,C >> A: {$in: [B, C]} # must contain key A and equal to B or C or be a list that contains |
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# B or C |
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A.cont=B&A.cont=C; A.cont=B,C >> A: {$in: [B, C]} |
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A.ncont=B >> A: {$nin: B} # must not contain key A or if present not equal to B or if a list, |
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# it must not not contain B |
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A.ncont=B,C; A.ncont=B&A.ncont=C >> A: {$nin: [B,C]} # must not contain key A or if present not equal |
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# neither B nor C; or if a list, it must not contain neither B nor C |
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A.ne=B&A.ne=C; A.ne=B,C >> A: {$nin: [B, C]} |
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A.gt=B >> A: {$gt: B} # must contain key A and greater than B |
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A.ne=B; A.neq=B >> A: {$ne: B} # must not contain key A or if present not equal to B, or if |
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# an array not contain B |
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A.ANYINDEX.B=C >> A: {$elemMatch: {B=C} |
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:return: database mongo filter |
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""" |
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try: |
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db_filter = {} |
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if not q_filter: |
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return db_filter |
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for query_k, query_v in q_filter.items(): |
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dot_index = query_k.rfind(".") |
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if dot_index > 1 and query_k[dot_index+1:] in ("eq", "ne", "gt", "gte", "lt", "lte", "cont", |
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"ncont", "neq"): |
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operator = "$" + query_k[dot_index + 1:] |
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if operator == "$neq": |
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operator = "$ne" |
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k = query_k[:dot_index] |
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else: |
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operator = "$eq" |
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k = query_k |
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v = query_v |
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if isinstance(v, list): |
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if operator in ("$eq", "$cont"): |
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operator = "$in" |
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v = query_v |
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elif operator in ("$ne", "$ncont"): |
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operator = "$nin" |
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v = query_v |
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else: |
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v = query_v.join(",") |
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if operator in ("$eq", "$cont"): |
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# v cannot be a comma separated list, because operator would have been changed to $in |
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db_v = v |
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elif operator == "$ncount": |
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# v cannot be a comma separated list, because operator would have been changed to $nin |
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db_v = {"$ne": v} |
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else: |
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db_v = {operator: v} |
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# process the ANYINDEX word at k. |
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kleft, _, kright = k.rpartition(".ANYINDEX.") |
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while kleft: |
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k = kleft |
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db_v = {"$elemMatch": {kright: db_v}} |
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kleft, _, kright = k.rpartition(".ANYINDEX.") |
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|
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# insert in db_filter |
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# maybe db_filter[k] exist. e.g. in the query string for values between 5 and 8: "a.gt=5&a.lt=8" |
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deep_update(db_filter, {k: db_v}) |
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return db_filter |
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except Exception as e: |
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raise DbException("Invalid query string filter at {}:{}. Error: {}".format(query_k, v, e), |
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http_code=HTTPStatus.BAD_REQUEST) |
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def get_list(self, table, q_filter=None): |
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""" |
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Obtain a list of entries matching q_filter |
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:param table: collection or table |
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:param q_filter: Filter |
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:return: a list (can be empty) with the found entries. Raises DbException on error |
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""" |
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try: |
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result = [] |
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with self.lock: |
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collection = self.db[table] |
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db_filter = self._format_filter(q_filter) |
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rows = collection.find(db_filter) |
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for row in rows: |
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result.append(row) |
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return result |
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except DbException: |
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raise |
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except Exception as e: # TODO refine |
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raise DbException(e) |
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def count(self, table, q_filter=None): |
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""" |
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Count the number of entries matching q_filter |
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:param table: collection or table |
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:param q_filter: Filter |
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:return: number of entries found (can be zero) |
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:raise: DbException on error |
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""" |
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try: |
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with self.lock: |
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collection = self.db[table] |
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db_filter = self._format_filter(q_filter) |
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count = collection.count(db_filter) |
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return count |
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except DbException: |
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raise |
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except Exception as e: # TODO refine |
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raise DbException(e) |
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def get_one(self, table, q_filter=None, fail_on_empty=True, fail_on_more=True): |
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""" |
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Obtain one entry matching q_filter |
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:param table: collection or table |
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:param q_filter: Filter |
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:param fail_on_empty: If nothing matches filter it returns None unless this flag is set tu True, in which case |
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it raises a DbException |
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:param fail_on_more: If more than one matches filter it returns one of then unless this flag is set tu True, so |
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that it raises a DbException |
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:return: The requested element, or None |
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""" |
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try: |
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db_filter = self._format_filter(q_filter) |
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with self.lock: |
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collection = self.db[table] |
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if not (fail_on_empty and fail_on_more): |
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return collection.find_one(db_filter) |
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rows = collection.find(db_filter) |
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if rows.count() == 0: |
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if fail_on_empty: |
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raise DbException("Not found any {} with filter='{}'".format(table[:-1], q_filter), |
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HTTPStatus.NOT_FOUND) |
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return None |
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elif rows.count() > 1: |
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if fail_on_more: |
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raise DbException("Found more than one {} with filter='{}'".format(table[:-1], q_filter), |
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HTTPStatus.CONFLICT) |
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return rows[0] |
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except Exception as e: # TODO refine |
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raise DbException(e) |
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|
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def del_list(self, table, q_filter=None): |
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""" |
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Deletes all entries that match q_filter |
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:param table: collection or table |
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:param q_filter: Filter |
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:return: Dict with the number of entries deleted |
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""" |
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try: |
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with self.lock: |
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collection = self.db[table] |
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rows = collection.delete_many(self._format_filter(q_filter)) |
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return {"deleted": rows.deleted_count} |
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except DbException: |
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raise |
| 307 |
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except Exception as e: # TODO refine |
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raise DbException(e) |
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|
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def del_one(self, table, q_filter=None, fail_on_empty=True): |
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""" |
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Deletes one entry that matches q_filter |
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:param table: collection or table |
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:param q_filter: Filter |
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:param fail_on_empty: If nothing matches filter it returns '0' deleted unless this flag is set tu True, in |
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which case it raises a DbException |
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:return: Dict with the number of entries deleted |
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""" |
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try: |
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with self.lock: |
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collection = self.db[table] |
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rows = collection.delete_one(self._format_filter(q_filter)) |
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if rows.deleted_count == 0: |
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if fail_on_empty: |
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raise DbException("Not found any {} with filter='{}'".format(table[:-1], q_filter), |
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HTTPStatus.NOT_FOUND) |
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return None |
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return {"deleted": rows.deleted_count} |
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except Exception as e: # TODO refine |
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raise DbException(e) |
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|
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def create(self, table, indata): |
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""" |
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Add a new entry at database |
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|
:param table: collection or table |
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|
:param indata: content to be added |
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|
:return: database id of the inserted element. Raises a DbException on error |
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""" |
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try: |
| 340 |
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with self.lock: |
| 341 |
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collection = self.db[table] |
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data = collection.insert_one(indata) |
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return data.inserted_id |
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except Exception as e: # TODO refine |
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raise DbException(e) |
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|
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def create_list(self, table, indata_list): |
| 348 |
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""" |
| 349 |
|
Add several entries at once |
| 350 |
|
:param table: collection or table |
| 351 |
|
:param indata_list: content list to be added. |
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:return: the list of inserted '_id's. Exception on error |
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|
""" |
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try: |
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for item in indata_list: |
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0 |
if item.get("_id") is None: |
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item["_id"] = str(uuid4()) |
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with self.lock: |
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collection = self.db[table] |
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data = collection.insert_many(indata_list) |
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return data.inserted_ids |
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except Exception as e: # TODO refine |
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raise DbException(e) |
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|
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def set_one(self, table, q_filter, update_dict, fail_on_empty=True, unset=None, pull=None, push=None, |
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push_list=None, pull_list=None): |
| 367 |
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""" |
| 368 |
|
Modifies an entry at database |
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|
:param table: collection or table |
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:param q_filter: Filter |
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:param update_dict: Plain dictionary with the content to be updated. It is a dot separated keys and a value |
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:param fail_on_empty: If nothing matches filter it returns None unless this flag is set tu True, in which case |
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it raises a DbException |
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:param unset: Plain dictionary with the content to be removed if exist. It is a dot separated keys, value is |
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ignored. If not exist, it is ignored |
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:param pull: Plain dictionary with the content to be removed from an array. It is a dot separated keys and value |
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if exist in the array is removed. If not exist, it is ignored |
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:param pull_list: Same as pull but values are arrays where each item is removed from the array |
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:param push: Plain dictionary with the content to be appended to an array. It is a dot separated keys and value |
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is appended to the end of the array |
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:param push_list: Same as push but values are arrays where each item is and appended instead of appending the |
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whole array |
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|
:return: Dict with the number of entries modified. None if no matching is found. |
| 384 |
|
""" |
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0 |
try: |
| 386 |
0 |
db_oper = {} |
| 387 |
0 |
if update_dict: |
| 388 |
0 |
db_oper["$set"] = update_dict |
| 389 |
0 |
if unset: |
| 390 |
0 |
db_oper["$unset"] = unset |
| 391 |
0 |
if pull or pull_list: |
| 392 |
0 |
db_oper["$pull"] = pull or {} |
| 393 |
0 |
if pull_list: |
| 394 |
0 |
db_oper["$pull"].update({k: {"$in": v} for k, v in pull_list.items()}) |
| 395 |
0 |
if push or push_list: |
| 396 |
0 |
db_oper["$push"] = push or {} |
| 397 |
0 |
if push_list: |
| 398 |
0 |
db_oper["$push"].update({k: {"$each": v} for k, v in push_list.items()}) |
| 399 |
|
|
| 400 |
0 |
with self.lock: |
| 401 |
0 |
collection = self.db[table] |
| 402 |
0 |
rows = collection.update_one(self._format_filter(q_filter), db_oper) |
| 403 |
0 |
if rows.matched_count == 0: |
| 404 |
0 |
if fail_on_empty: |
| 405 |
0 |
raise DbException("Not found any {} with filter='{}'".format(table[:-1], q_filter), |
| 406 |
|
HTTPStatus.NOT_FOUND) |
| 407 |
0 |
return None |
| 408 |
0 |
return {"modified": rows.modified_count} |
| 409 |
0 |
except Exception as e: # TODO refine |
| 410 |
0 |
raise DbException(e) |
| 411 |
|
|
| 412 |
1 |
def set_list(self, table, q_filter, update_dict, unset=None, pull=None, push=None, push_list=None, pull_list=None): |
| 413 |
|
""" |
| 414 |
|
Modifies al matching entries at database |
| 415 |
|
:param table: collection or table |
| 416 |
|
:param q_filter: Filter |
| 417 |
|
:param update_dict: Plain dictionary with the content to be updated. It is a dot separated keys and a value |
| 418 |
|
:param unset: Plain dictionary with the content to be removed if exist. It is a dot separated keys, value is |
| 419 |
|
ignored. If not exist, it is ignored |
| 420 |
|
:param pull: Plain dictionary with the content to be removed from an array. It is a dot separated keys and value |
| 421 |
|
if exist in the array is removed. If not exist, it is ignored |
| 422 |
|
:param push: Plain dictionary with the content to be appended to an array. It is a dot separated keys, the |
| 423 |
|
single value is appended to the end of the array |
| 424 |
|
:param pull_list: Same as pull but values are arrays where each item is removed from the array |
| 425 |
|
:param push_list: Same as push but values are arrays where each item is and appended instead of appending the |
| 426 |
|
whole array |
| 427 |
|
:return: Dict with the number of entries modified |
| 428 |
|
""" |
| 429 |
0 |
try: |
| 430 |
0 |
db_oper = {} |
| 431 |
0 |
if update_dict: |
| 432 |
0 |
db_oper["$set"] = update_dict |
| 433 |
0 |
if unset: |
| 434 |
0 |
db_oper["$unset"] = unset |
| 435 |
0 |
if pull or pull_list: |
| 436 |
0 |
db_oper["$pull"] = pull or {} |
| 437 |
0 |
if pull_list: |
| 438 |
0 |
db_oper["$pull"].update({k: {"$in": v} for k, v in pull_list.items()}) |
| 439 |
0 |
if push or push_list: |
| 440 |
0 |
db_oper["$push"] = push or {} |
| 441 |
0 |
if push_list: |
| 442 |
0 |
db_oper["$push"].update({k: {"$each": v} for k, v in push_list.items()}) |
| 443 |
0 |
with self.lock: |
| 444 |
0 |
collection = self.db[table] |
| 445 |
0 |
rows = collection.update_many(self._format_filter(q_filter), db_oper) |
| 446 |
0 |
return {"modified": rows.modified_count} |
| 447 |
0 |
except Exception as e: # TODO refine |
| 448 |
0 |
raise DbException(e) |
| 449 |
|
|
| 450 |
1 |
def replace(self, table, _id, indata, fail_on_empty=True): |
| 451 |
|
""" |
| 452 |
|
Replace the content of an entry |
| 453 |
|
:param table: collection or table |
| 454 |
|
:param _id: internal database id |
| 455 |
|
:param indata: content to replace |
| 456 |
|
:param fail_on_empty: If nothing matches filter it returns None unless this flag is set tu True, in which case |
| 457 |
|
it raises a DbException |
| 458 |
|
:return: Dict with the number of entries replaced |
| 459 |
|
""" |
| 460 |
0 |
try: |
| 461 |
0 |
db_filter = {"_id": _id} |
| 462 |
0 |
with self.lock: |
| 463 |
0 |
collection = self.db[table] |
| 464 |
0 |
rows = collection.replace_one(db_filter, indata) |
| 465 |
0 |
if rows.matched_count == 0: |
| 466 |
0 |
if fail_on_empty: |
| 467 |
0 |
raise DbException("Not found any {} with _id='{}'".format(table[:-1], _id), HTTPStatus.NOT_FOUND) |
| 468 |
0 |
return None |
| 469 |
0 |
return {"replaced": rows.modified_count} |
| 470 |
0 |
except Exception as e: # TODO refine |
| 471 |
0 |
raise DbException(e) |
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