Implemented setting the gc region to new topics (#249)

* Add test to add region to topic creation

* Implemented setting the gc region to new topics

* Fix linting

* Fix test

* Fix linting

* Fix test

---------

Co-authored-by: jponzvan <jponzvan@mercadona.es>

docs/settings.rst

@@ -31,6 +31,7 @@ Example::
         'PUBLISHER_TIMEOUT': 3.0,
         'FILTER_SUBS_BY': boolean_function,
         'DEFAULT_RETRY_POLICY': RetryPolicy(10, 50),
+        'GC_STORAGE_REGION': 'europe-west1',
     }
 
 ``GC_PROJECT_ID``
@@ -187,3 +188,10 @@ A RetryPolicy object which must be instantiated with `minimum_backoff` and `maxi
 If not set, the default retry policy is applied, meaning a minimum backoff of 10 seconds and a maximum backoff of 60 seconds.
 This generally implies that messages will be retried as soon as possible for healthy subscribers.
 RetryPolicy will be triggered on NACKs or acknowledgement deadline exceeded events for a given message.
+
+``GC_STORAGE_REGION``
+----------------------------
+
+**Optional**
+
+Set the Google Cloud's region for storing the messages. By default is `europe-west1`

rele/__main__.py

@@ -3,7 +3,7 @@
 import os
 import sys
 
-from rele import config, discover, subscription
+from rele import config, discover
 from rele.worker import create_and_run
 
 logger = logging.getLogger(__name__)

rele/client.py

@@ -9,6 +9,7 @@
 from google.api_core import exceptions
 from google.cloud import pubsub_v1
 from google.protobuf import duration_pb2
+from google.pubsub_v1 import MessageStoragePolicy
 from google.pubsub_v1 import RetryPolicy as GCloudRetryPolicy
 
 from rele.middleware import run_middleware_hook
@@ -37,6 +38,7 @@ class Subscriber:
 
     :param gc_project_id: str :ref:`settings_project_id` .
     :param credentials: obj :meth:`~rele.config.Config.credentials`.
+    :param message_storage_policy: str Region to store the messages
     :param default_ack_deadline: int Ack Deadline defined in settings
     :param default_retry_policy: RetryPolicy Rele's RetryPolicy defined in settings
     """
@@ -45,12 +47,14 @@ def __init__(
         self,
         gc_project_id,
         credentials,
+        message_storage_policy,
         default_ack_deadline=None,
         default_retry_policy=None,
     ):
         self._gc_project_id = gc_project_id
         self._ack_deadline = default_ack_deadline or DEFAULT_ACK_DEADLINE
         self.credentials = credentials if not USE_EMULATOR else None
+        self._message_storage_policy = message_storage_policy
         self._client = pubsub_v1.SubscriberClient(credentials=credentials)
         self._retry_policy = default_retry_policy
 
@@ -83,7 +87,14 @@ def create_subscription(self, subscription):
 
     def _create_topic(self, topic_path):
         publisher_client = pubsub_v1.PublisherClient(credentials=self.credentials)
-        return publisher_client.create_topic(request={"name": topic_path})
+        return publisher_client.create_topic(
+            request={
+                "name": topic_path,
+                "message_storage_policy": MessageStoragePolicy(
+                    {"allowed_persistence_regions": [self._message_storage_policy]}
+                ),
+            }
+        )
 
     def _create_subscription(self, subscription_path, topic_path, subscription):
         request = {

rele/config.py

@@ -1,6 +1,5 @@
 import importlib
 import os
-import warnings
 
 from google.oauth2 import service_account
 
@@ -29,6 +28,7 @@ class Config:
     def __init__(self, setting):
         self._gc_project_id = setting.get("GC_PROJECT_ID")
         self.gc_credentials_path = setting.get("GC_CREDENTIALS_PATH")
+        self.gc_storage_region = setting.get("GC_STORAGE_REGION", "europe-west1")
         self.app_name = setting.get("APP_NAME")
         self.sub_prefix = setting.get("SUB_PREFIX")
         self.middleware = setting.get("MIDDLEWARE", default_middleware)

rele/worker.py

@@ -27,12 +27,17 @@ def __init__(
         subscriptions,
         gc_project_id=None,
         credentials=None,
+        gc_storage_region=None,
         default_ack_deadline=None,
         threads_per_subscription=None,
         default_retry_policy=None,
     ):
         self._subscriber = Subscriber(
-            gc_project_id, credentials, default_ack_deadline, default_retry_policy
+            gc_project_id,
+            credentials,
+            gc_storage_region,
+            default_ack_deadline,
+            default_retry_policy,
         )
         self._futures = {}
         self._subscriptions = subscriptions
@@ -153,6 +158,7 @@ def create_and_run(subs, config):
         subs,
         config.gc_project_id,
         config.credentials,
+        config.gc_storage_region,
         config.ack_deadline,
         config.threads_per_subscription,
         config.retry_policy,

tests/commands/test_runrele.py

@@ -22,7 +22,9 @@ def mock_worker(self):
     def test_calls_worker_start_and_setup_when_runrele(self, mock_worker):
         call_command("runrele")
 
-        mock_worker.assert_called_with([], "rele-test", ANY, 60, 2, None)
+        mock_worker.assert_called_with(
+            [], "rele-test", ANY, "europe-west1", 60, 2, None
+        )
         mock_worker.return_value.run_forever.assert_called_once_with()
 
     def test_prints_warning_when_conn_max_age_not_set_to_zero(
@@ -37,5 +39,7 @@ def test_prints_warning_when_conn_max_age_not_set_to_zero(
             "This may result in slots for database connections to "
             "be exhausted." in err
         )
-        mock_worker.assert_called_with([], "rele-test", ANY, 60, 2, None)
+        mock_worker.assert_called_with(
+            [], "rele-test", ANY, "europe-west1", 60, 2, None
+        )
         mock_worker.return_value.run_forever.assert_called_once_with()

tests/conftest.py

@@ -27,6 +27,7 @@ def config(project_id):
             "APP_NAME": "rele",
             "SUB_PREFIX": "rele",
             "GC_CREDENTIALS_PATH": "tests/dummy-pub-sub-credentials.json",
+            "GC_STORAGE_REGION": "some-region",
             "MIDDLEWARE": ["rele.contrib.LoggingMiddleware"],
         }
     )
@@ -39,6 +40,7 @@ def config_with_retry_policy(project_id):
             "APP_NAME": "rele",
             "SUB_PREFIX": "rele",
             "GC_CREDENTIALS_PATH": "tests/dummy-pub-sub-credentials.json",
+            "GC_STORAGE_REGION": "some-region",
             "MIDDLEWARE": ["rele.contrib.LoggingMiddleware"],
             "DEFAULT_RETRY_POLICY": RetryPolicy(5, 30),
         }
@@ -47,7 +49,9 @@ def config_with_retry_policy(project_id):
 
 @pytest.fixture
 def subscriber(project_id, config):
-    return Subscriber(config.gc_project_id, config.credentials, 60)
+    return Subscriber(
+        config.gc_project_id, config.credentials, config.gc_storage_region, 60
+    )
 
 
 @pytest.fixture

tests/test_client.py

@@ -9,6 +9,7 @@
 from google.cloud import pubsub_v1
 from google.cloud.pubsub_v1 import PublisherClient, SubscriberClient
 from google.protobuf import duration_pb2
+from google.pubsub_v1 import MessageStoragePolicy
 
 from rele import Subscriber
 from rele.retry_policy import RetryPolicy
@@ -279,7 +280,12 @@ def test_creates_topic_when_subscription_topic_does_not_exist(
 
         assert _mocked_client.call_count == 2
         mock_create_topic.assert_called_with(
-            request={"name": f"projects/rele-test/topics/{project_id}-test-topic"}
+            request={
+                "name": f"projects/rele-test/topics/{project_id}-test-topic",
+                "message_storage_policy": MessageStoragePolicy(
+                    {"allowed_persistence_regions": ["some-region"]}
+                ),
+            }
         )
 
         _mocked_client.assert_called_with(
@@ -328,6 +334,7 @@ def test_default_retry_policy_is_applied_when_not_explicitly_provided(
         subscriber = Subscriber(
             config_with_retry_policy.gc_project_id,
             config_with_retry_policy.credentials,
+            config_with_retry_policy.gc_storage_region,
             60,
             config_with_retry_policy.retry_policy,
         )

tests/test_worker.py

@@ -15,7 +15,7 @@
 
 @sub(topic="some-cool-topic", prefix="rele")
 def sub_stub(data, **kwargs):
-    print(f"I am a task doing stuff.")
+    print("I am a task doing stuff.")
 
 
 @pytest.fixture
@@ -25,6 +25,7 @@ def worker(config):
         subscriptions,
         config.gc_project_id,
         config.credentials,
+        config.gc_storage_region,
         default_ack_deadline=60,
         threads_per_subscription=10,
         default_retry_policy=config.retry_policy,
@@ -105,6 +106,7 @@ def test_creates_subscription_with_custom_ack_deadline_from_environment(
         worker = Worker(
             subscriptions,
             config.gc_project_id,
+            config.gc_storage_region,
             config.credentials,
             custom_ack_deadline,
             threads_per_subscription=10,
@@ -168,6 +170,7 @@ def test_waits_forever_when_called_with_config_and_subs(
             subscriptions,
             "rele-test",
             ANY,
+            "some-region",
             60,
             2,
             RetryPolicy(5, 30),