This document describes the current stable version of Celery (4.0). For development docs, go here.

Source code for celery.backends.couchbase

# -*- coding: utf-8 -*-
"""Couchbase result store backend."""
from __future__ import absolute_import, unicode_literals
import logging
from kombu.utils.encoding import str_t
from kombu.utils.url import _parse_url
from celery.exceptions import ImproperlyConfigured
from .base import KeyValueStoreBackend
    from couchbase import Couchbase
    from couchbase.connection import Connection
    from couchbase.exceptions import NotFoundError
except ImportError:
    Couchbase = Connection = NotFoundError = None   # noqa

__all__ = ['CouchbaseBackend']

[docs]class CouchbaseBackend(KeyValueStoreBackend): """Couchbase backend. Raises: celery.exceptions.ImproperlyConfigured: if module :pypi:`couchbase` is not available. """ bucket = 'default' host = 'localhost' port = 8091 username = None password = None quiet = False timeout = 2.5 # Use str as couchbase key not bytes key_t = str_t def __init__(self, url=None, *args, **kwargs): super(CouchbaseBackend, self).__init__(*args, **kwargs) self.url = url if Couchbase is None: raise ImproperlyConfigured( 'You need to install the couchbase library to use the ' 'Couchbase backend.', ) uhost = uport = uname = upass = ubucket = None if url: _, uhost, uport, uname, upass, ubucket, _ = _parse_url(url) ubucket = ubucket.strip('/') if ubucket else None config ='couchbase_backend_settings', None) if config is not None: if not isinstance(config, dict): raise ImproperlyConfigured( 'Couchbase backend settings should be grouped in a dict', ) else: config = {} = uhost or config.get('host', self.port = int(uport or config.get('port', self.port)) self.bucket = ubucket or config.get('bucket', self.bucket) self.username = uname or config.get('username', self.username) self.password = upass or config.get('password', self.password) self._connection = None def _get_connection(self): """Connect to the Couchbase server.""" if self._connection is None: kwargs = {'bucket': self.bucket, 'host':} if self.port: kwargs.update({'port': self.port}) if self.username: kwargs.update({'username': self.username}) if self.password: kwargs.update({'password': self.password}) logging.debug('couchbase settings %r', kwargs) self._connection = Connection(**kwargs) return self._connection @property def connection(self): return self._get_connection()
[docs] def get(self, key): try: return self.connection.get(key).value except NotFoundError: return None
[docs] def set(self, key, value): self.connection.set(key, value)
[docs] def mget(self, keys): return [self.get(key) for key in keys]
[docs] def delete(self, key): self.connection.delete(key)