mirror of
https://github.com/bigchaindb/bigchaindb.git
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137 lines
5.9 KiB
Python
137 lines
5.9 KiB
Python
# Copyright © 2024 Atlantic Algorithms Ltd.,
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# CoreChainDB and Atlantic Algorithms Ltd. software contributors.
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# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
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# Code is Apache-2.0 and docs are CC-BY-4.0
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import logging
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from ssl import CERT_REQUIRED
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import pymongo
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from corechaindb.backend.connection import Connection
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from corechaindb.backend.exceptions import (DuplicateKeyError,
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OperationError,
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ConnectionError)
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from corechaindb.backend.utils import get_corechaindb_config_value
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from corechaindb.common.exceptions import ConfigurationError
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from corechaindb.utils import Lazy
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logger = logging.getLogger(__name__)
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class LocalMongoDBConnection(Connection):
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def __init__(self, replicaset=None, ssl=None, login=None, password=None,
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ca_cert=None, certfile=None, keyfile=None,
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keyfile_passphrase=None, crlfile=None, **kwargs):
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"""Create a new Connection instance.
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Args:
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replicaset (str, optional): the name of the replica set to
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connect to.
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**kwargs: arbitrary keyword arguments provided by the
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configuration's ``database`` settings
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"""
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super().__init__(**kwargs)
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self.replicaset = replicaset or get_corechaindb_config_value('replicaset')
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self.ssl = ssl if ssl is not None else get_corechaindb_config_value('ssl', False)
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self.login = login or get_corechaindb_config_value('login')
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self.password = password or get_corechaindb_config_value('password')
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self.ca_cert = ca_cert or get_corechaindb_config_value('ca_cert')
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self.certfile = certfile or get_corechaindb_config_value('certfile')
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self.keyfile = keyfile or get_corechaindb_config_value('keyfile')
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self.keyfile_passphrase = keyfile_passphrase or get_corechaindb_config_value('keyfile_passphrase')
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self.crlfile = crlfile or get_corechaindb_config_value('crlfile')
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@property
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def db(self):
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return self.conn[self.dbname]
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def query(self):
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return Lazy()
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def collection(self, name):
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"""Return a lazy object that can be used to compose a query.
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Args:
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name (str): the name of the collection to query.
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"""
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return self.query()[self.dbname][name]
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def run(self, query):
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try:
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try:
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return query.run(self.conn)
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except pymongo.errors.AutoReconnect:
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logger.warning('Lost connection to the database, '
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'retrying query.')
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return query.run(self.conn)
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except pymongo.errors.AutoReconnect as exc:
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raise ConnectionError from exc
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except pymongo.errors.DuplicateKeyError as exc:
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raise DuplicateKeyError from exc
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except pymongo.errors.OperationFailure as exc:
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print(f'DETAILS: {exc.details}')
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raise OperationError from exc
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def _connect(self):
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"""Try to connect to the database.
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Raises:
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:exc:`~ConnectionError`: If the connection to the database
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fails.
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:exc:`~AuthenticationError`: If there is a OperationFailure due to
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Authentication failure after connecting to the database.
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:exc:`~ConfigurationError`: If there is a ConfigurationError while
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connecting to the database.
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"""
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try:
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# FYI: the connection process might raise a
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# `ServerSelectionTimeoutError`, that is a subclass of
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# `ConnectionFailure`.
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# The presence of ca_cert, certfile, keyfile, crlfile implies the
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# use of certificates for TLS connectivity.
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if self.ca_cert is None or self.certfile is None or \
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self.keyfile is None or self.crlfile is None:
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client = pymongo.MongoClient(self.host,
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self.port,
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replicaset=self.replicaset,
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serverselectiontimeoutms=self.connection_timeout,
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ssl=self.ssl,
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**MONGO_OPTS)
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if self.login is not None and self.password is not None:
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client[self.dbname].authenticate(self.login, self.password)
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else:
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logger.info('Connecting to MongoDB over TLS/SSL...')
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client = pymongo.MongoClient(self.host,
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self.port,
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replicaset=self.replicaset,
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serverselectiontimeoutms=self.connection_timeout,
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ssl=self.ssl,
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ssl_ca_certs=self.ca_cert,
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ssl_certfile=self.certfile,
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ssl_keyfile=self.keyfile,
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ssl_pem_passphrase=self.keyfile_passphrase,
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ssl_crlfile=self.crlfile,
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ssl_cert_reqs=CERT_REQUIRED,
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**MONGO_OPTS)
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if self.login is not None:
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client[self.dbname].authenticate(self.login,
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mechanism='MONGODB-X509')
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return client
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except (pymongo.errors.ConnectionFailure,
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pymongo.errors.OperationFailure) as exc:
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logger.info('Exception in _connect(): {}'.format(exc))
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raise ConnectionError(str(exc)) from exc
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except pymongo.errors.ConfigurationError as exc:
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raise ConfigurationError from exc
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MONGO_OPTS = {
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'socketTimeoutMS': 20000,
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}
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