Switch from deprecated amqp backend to rpc

The previously used amqp result backend has been marked as deprecated by
the celery developers. This commit switches to the rpc backend that
should be used instead.

This commit renames get_env_setting to get_env_variable to be consistent
with the gva settings modules.

gvaldap/gvaldap/settings/base.py

@@ -5,28 +5,28 @@ Common settings and globals.
 
 """
 
+from os import environ
 from os.path import abspath, basename, dirname, join, normpath
 from sys import path
-from os import environ
 
 # Normally you should not import ANYTHING from Django directly
 # into your settings, but ImproperlyConfigured is an exception.
 from django.core.exceptions import ImproperlyConfigured
 
 
-def get_env_setting(setting):
+def get_env_variable(var_name):
     """
-    Get the environment setting or return exception.
+    Get a setting from an environment variable.
 
-    :param str setting: name of an environment setting
+    :param str var_name: variable name
     :raises ImproperlyConfigured: if the environment setting is not defined
     :return: environment setting value
     :rtype: str
     """
     try:
-        return environ[setting]
+        return environ[var_name]
     except KeyError:
-        error_msg = "Set the %s env variable" % setting
+        error_msg = "Set the %s environment variable" % var_name
         raise ImproperlyConfigured(error_msg)
 
 
@@ -58,7 +58,7 @@ TEMPLATE_DEBUG = DEBUG
 ########## MANAGER CONFIGURATION
 # See: https://docs.djangoproject.com/en/dev/ref/settings/#admins
 ADMINS = (
-    (get_env_setting('GVALDAP_ADMIN_NAME'), get_env_setting('GVALDAP_ADMIN_EMAIL')),
+    (get_env_variable('GVALDAP_ADMIN_NAME'), get_env_variable('GVALDAP_ADMIN_EMAIL')),
 )
 
 # See: https://docs.djangoproject.com/en/dev/ref/settings/#managers
@@ -79,9 +79,9 @@ DATABASES = {
     },
     'ldap': {
         'ENGINE': 'ldapdb.backends.ldap',
-        'NAME': get_env_setting('GVALDAP_LDAP_URL'),
-        'USER': get_env_setting('GVALDAP_LDAP_USER'),
-        'PASSWORD': get_env_setting('GVALDAP_LDAP_PASSWORD'),
+        'NAME': get_env_variable('GVALDAP_LDAP_URL'),
+        'USER': get_env_variable('GVALDAP_LDAP_USER'),
+        'PASSWORD': get_env_variable('GVALDAP_LDAP_PASSWORD'),
     }
 }
 DATABASE_ROUTERS = ['ldapdb.router.Router']
@@ -141,7 +141,7 @@ STATICFILES_FINDERS = (
 ########## SECRET CONFIGURATION
 # See: https://docs.djangoproject.com/en/dev/ref/settings/#secret-key
 # Note: This key should only be used for development and testing.
-SECRET_KEY = get_env_setting('GVALDAP_SECRETKEY')
+SECRET_KEY = get_env_variable('GVALDAP_SECRETKEY')
 ########## END SECRET CONFIGURATION
 
 
@@ -279,15 +279,15 @@ WSGI_APPLICATION = '%s.wsgi.application' % SITE_NAME
 ########## END WSGI CONFIGURATION
 
 
-########## LDAP SETTINGS
-GROUP_BASE_DN = get_env_setting('GVALDAP_BASEDN_GROUP')
-USER_BASE_DN = get_env_setting('GVALDAP_BASEDN_USER')
-########## END LDAP SETTINGS
+# ######### LDAP SETTINGS
+GROUP_BASE_DN = get_env_variable('GVALDAP_BASEDN_GROUP')
+USER_BASE_DN = get_env_variable('GVALDAP_BASEDN_USER')
+# ######### END LDAP SETTINGS
 
 
 ########## CELERY CONFIGURATION
-BROKER_URL = get_env_setting('GVALDAP_BROKER_URL')
-CELERY_RESULT_BACKEND = 'amqp'
+BROKER_URL = get_env_variable('GVALDAP_BROKER_URL')
+CELERY_RESULT_BACKEND = 'rpc://'
 CELERY_RESULT_PERSISTENT = True
 CELERY_TASK_RESULT_EXPIRES = None
 CELERY_ROUTES = (
@@ -296,6 +296,6 @@ CELERY_ROUTES = (
 CELERY_TIMEZONE = 'Europe/Berlin'
 CELERY_ENABLE_UTC = True
 CELERY_ACCEPT_CONTENT = ['json']
-CELERY_TASK_SERAILIZER = 'json'
+CELERY_TASK_SERIALIZER = 'json'
 CELERY_RESULT_SERIALIZER = 'json'
 ########## END CELERY CONFIGURATION

gvaldap/gvaldap/settings/production.py

@@ -10,7 +10,7 @@ from .base import *
 
 ########## HOST CONFIGURATION
 # See: https://docs.djangoproject.com/en/1.5/releases/1.5/#allowed-hosts-required-in-production
-ALLOWED_HOSTS = get_env_setting('GVALDAP_ALLOWED_HOSTS').split(',')
+ALLOWED_HOSTS = get_env_variable('GVALDAP_ALLOWED_HOSTS').split(',')
 ########## END HOST CONFIGURATION
 
 ########## EMAIL CONFIGURATION
@@ -36,7 +36,7 @@ EMAIL_SUBJECT_PREFIX = '[%s] ' % SITE_NAME
 #EMAIL_USE_TLS = True
 
 # See: https://docs.djangoproject.com/en/dev/ref/settings/#server-email
-SERVER_EMAIL = get_env_setting('GVALDAP_SERVER_EMAIL')
+SERVER_EMAIL = get_env_variable('GVALDAP_SERVER_EMAIL')
 ########## END EMAIL CONFIGURATION
 
 ########## DATABASE CONFIGURATION