def _load_service(self, name, environ):
for plugin in extensions.get(group="twelve.services", name=name):
service = plugin.load()
value = service(environ, self.names.get(plugin.name))
if self.adapter is not None:
adapters = list(extensions.get(group="twelve.adapters", name="{0}.{1}".format(self.adapter, plugin.name)))
if len(adapters):
adapter = adapters[0].load()
value = adapter(value)
return value
def _get_environ_value(self, name, environ):
value = environ.get(name.upper())
if self.adapter is not None:
adapters = list(extensions.get(group="twelve.adapters", name="{0}.{1}".format(self.adapter, name)))
if len(adapters):
adapter = adapters[0].load()
value = adapter(value)
return value
def __getattr__(self, name):
if not name in self.values:
names = [plugin.name for plugin in extensions.get(group="twelve.services")]
environ = self.environ if self.environ is not None else os.environ
if name in names:
# We are trying to get a Backing Service, Load it
self.values[name] = self._load_service(name, environ=environ)
elif name.upper() in environ:
self.values[name] = self._get_environ_value(name, environ=environ)
else:
self.values[name] = None
return self.values[name]