def test_register_handler_subscription(self):
src = entry_point.EntryPointFactory().create("src_service.src_method")
dst = entry_point.EntryPointFactory().create("dst_service.rpl_method")
@dispatcher.rpc_service(dst.service)
class SomeControllerClass(service.ServiceController):
@dispatcher.subscription_method(service=src.service,
method=src.method)
def handler(self):
pass
headers = {
"source": str(src),
"destination": "",
"reply_to": "",
"correlation_id": "123",
"message_type": "notification"
}
context = {}
payload = {}
message = messages.IncomingNotification(headers, context, payload)
service_classes = router.Router().get_subscription_cls(message)
self.assertEqual(service_classes, [SomeControllerClass])
controller = SomeControllerClass(mock.MagicMock())
disp = controller.get_dispatcher()
handler = controller.get_dispatcher().get_handler(
disp._get_dispatching_entry_point(message), "notification")
self.assertEqual("handler", handler)
def __init__(self, headers, context, payload):
super(Message, self).__init__()
if not headers.get("message_id"):
headers["message_id"] = uuid.uuid4().hex
self.correlation_id = headers.get("correlation_id")
self.request_id = headers.get("request_id")
self.message_id = headers.get("message_id")
self.message_type = headers.get("message_type")
self.reply_to = entry_point.EntryPointFactory().create(
headers.get("reply_to"))
self.source = entry_point.EntryPointFactory().create(
headers.get("source"), source=True)
self.destination = entry_point.EntryPointFactory().create(
headers.get("destination"), destination=True)
self._headers = copy.copy(headers)
self._context = context or {}
self._payload = payload
if not isinstance(self.source, entry_point.EntryPoint):
raise TypeError('source must be EntryPoint')
if not isinstance(payload, dict):
raise TypeError('payload must be dict, received {}'.format(
type(payload)))
def create(self, amqp_message):
"""
Create corresponding message object by AMQP message
:param amqp_message: AMQP message
:type amqp_message: messages.AMQPMessage
:return: message object
:rtype: messages.Message
"""
headers = amqp_message.headers
reply_to = entry_point.EntryPointFactory().create(headers["reply_to"])
message_cls = self.get_class(headers["message_type"], reply_to)
body = amqp_message.body_deserialize()
payload = body["payload"]
context = body["context"]
if issubclass(message_cls, IncomingRequestCall):
return self._create_request_call(headers, context, payload)
elif issubclass(message_cls, Error):
return self._create_error(headers, context, payload)
elif issubclass(message_cls, IncomingNotification):
return self.create_notification(headers, context, payload)
else:
return self._create_message(message_cls, headers, context, payload)
def get_request_entry_services(self):
"""
Generates entry points for requests
:return: generator of EntryPoints
"""
for ep in self._handlers["request"].keys():
yield entry_point.EntryPointFactory().create(ep).service
def get_publishers(self):
"""
Generates entry points for notifications
:return: generator of EntryPoints
"""
for ep in self.subscriptions.keys():
yield entry_point.EntryPointFactory().create(ep)
def __getattr__(self, item):
if isinstance(self._source, entry_point.EntryPoint):
source = self._source
else:
source = entry_point.EntryPointFactory().create(self._source)
postproc = self._get_postprocessor()
proxy = proxies.RPCProxy(postproc, source,
context=self._context, headers=self._headers)
return getattr(proxy, item)
def _send(self, message):
"""
Sends AMQP message to exchange via writer
:param message: AMQP message to send
:type message: messages.AMQPMessage
:return:
"""
discovery_service = self.discovery_service
if message.headers["message_type"] == "notification":
source = message.headers["source"]
ep = entry_point.EntryPointFactory().create(source)
exchange = discovery_service.get_local_publisher(ep.service)
elif message.headers["message_type"] in ("response", "error"):
rk = message.headers["destination"]
ep = entry_point.EntryPointFactory().create(rk)
exchange = discovery_service.get_remote(ep.service)
else:
dst = message.headers["destination"]
ep = entry_point.EntryPointFactory().create(dst)
exchange = discovery_service.get_remote(ep.service)
routing_key = ep.to_routing_key()
self._driver.publish_message(exchange, routing_key, message)
def _get_source_context(self, message, service_instance):
"""
Prepares 'source' value for RPC proxy
:param message: incoming message
:type message: Message
:param service_instance: Service controller instance
:type service_instance: service.ServiceController
:rtype: EntryPoint
"""
if isinstance(message, (messages.IncomingError,
messages.IncomingResponse)):
return message.destination
elif isinstance(message, messages.IncomingNotification):
return entry_point.EntryPointFactory().create(
service_instance.service_name)
else:
return message.destination
def test_process_notification_by_service_instance(self, create_proxy_mock):
"""
Tests that service instance processes message
"""
headers = {
"source": "src_service.src_method",
"destination": "dst_service.dst_method",
"reply_to": "rpl_service.rpl_method",
"correlation_id": "123",
"message_type": "notification"
}
context = {}
payload = {}
service_instance = mock.MagicMock()
msg = messages.IncomingNotification(headers, context, payload)
ep = entry_point.EntryPointFactory().create(msg.source)
message_type = "notification"
method_name = "some_handler"
self.dispatcher.register(ep, message_type, method_name)
res = self.dispatcher.process(msg, service_instance)
service_instance.process.assert_called_once_with(
method_name, msg, create_proxy_mock())
self.assertEqual(res, service_instance.process())
def setUp(self):
super(EntryPointFactoryTestCase, self).setUp()
self.ep_factory = entry_point.EntryPointFactory()
