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# The MIT License (MIT)
# Copyright (c) Microsoft Corporation. All rights reserved.
import unittest
import pytest
import azure.cosmos._constants as constants
import azure.cosmos._global_endpoint_manager as global_endpoint_manager
import azure.cosmos.cosmos_client as cosmos_client
import azure.cosmos.documents as documents
import azure.cosmos.exceptions as exceptions
import test_config
from azure.cosmos import _retry_utility
from azure.cosmos._global_partition_endpoint_manager_circuit_breaker import \
_GlobalPartitionEndpointManagerForCircuitBreaker
from azure.cosmos.http_constants import StatusCodes
location_changed = False
class MockGlobalEndpointManager(_GlobalPartitionEndpointManagerForCircuitBreaker):
def __init__(self, client):
super(MockGlobalEndpointManager, self).__init__(client)
self.Client = client
self.DefaultEndpoint = client.url_connection
self._ReadEndpoint = client.url_connection
self._WriteEndpoint = client.url_connection
self.EnableEndpointDiscovery = client.connection_policy.EnableEndpointDiscovery
self.IsEndpointCacheInitialized = False
self.refresh_count = 0
self.DatabaseAccountAvailable = True
def RefreshEndpointList(self):
global location_changed
if not location_changed:
database_account = self.GetDatabaseAccount1()
else:
database_account = self.GetDatabaseAccount2()
if self.DatabaseAccountAvailable is False:
database_account = None
writable_locations = []
readable_locations = []
else:
writable_locations = database_account.WritableLocations
readable_locations = database_account.ReadableLocations
self._WriteEndpoint, self._ReadEndpoint = self.UpdateLocationsCache(writable_locations, readable_locations)
@property
def ReadEndpoint(self):
if not self.IsEndpointCacheInitialized:
self.RefreshEndpointList()
return self._ReadEndpoint
@property
def WriteEndpoint(self):
if not self.IsEndpointCacheInitialized:
self.RefreshEndpointList()
return self._WriteEndpoint
def _GetDatabaseAccount(self, **kwargs):
return documents.DatabaseAccount(), ""
def force_refresh_on_startup(self, database_account):
return
def get_write_endpoint(self):
return self._WriteEndpoint
def get_read_endpoint(self):
return self._ReadEndpoint
def resolve_service_endpoint_for_partition(self, request, pk_range_wrapper):
return
def refresh_endpoint_list(self, database_account, **kwargs):
return
def can_use_multiple_write_locations(self, request):
return False
def GetDatabaseAccount1(self):
database_account = documents.DatabaseAccount()
database_account._ReadableLocations = [{'name': TestGlobalDBMock.read_location,
'databaseAccountEndpoint': TestGlobalDBMock.read_location_host}]
database_account._WritableLocations = [{'name': TestGlobalDBMock.write_location,
'databaseAccountEndpoint': TestGlobalDBMock.write_location_host}]
return database_account
def GetDatabaseAccount2(self):
database_account = documents.DatabaseAccount()
database_account._ReadableLocations = [{'name': TestGlobalDBMock.write_location,
'databaseAccountEndpoint': TestGlobalDBMock.write_location_host}]
database_account._WritableLocations = [{'name': TestGlobalDBMock.read_location,
'databaseAccountEndpoint': TestGlobalDBMock.read_location_host}]
return database_account
def UpdateLocationsCache(self, writable_locations, readable_locations):
if len(writable_locations) == 0:
write_endpoint = self.DefaultEndpoint
else:
write_endpoint = writable_locations[0][constants._Constants.DatabaseAccountEndpoint]
if len(readable_locations) == 0:
read_endpoint = write_endpoint
else:
read_endpoint = writable_locations[0][constants._Constants.DatabaseAccountEndpoint]
return write_endpoint, read_endpoint
@pytest.mark.cosmosEmulator
class TestGlobalDBMock(unittest.TestCase):
host = test_config.TestConfig.global_host
write_location_host = test_config.TestConfig.write_location_host
read_location_host = test_config.TestConfig.read_location_host
masterKey = test_config.TestConfig.global_masterKey
write_location = test_config.TestConfig.write_location
read_location = test_config.TestConfig.read_location
@classmethod
def setUpClass(cls):
if (cls.masterKey == '[YOUR_KEY_HERE]' or
cls.host == '[YOUR_GLOBAL_ENDPOINT_HERE]'):
raise Exception(
"You must specify your Azure Cosmos account values for "
"'masterKey' and 'host' at the top of this class to run the "
"tests.")
def setUp(self):
self.endpoint_discovery_retry_count = 0
# Copying the original objects and functions before assigning the mock versions of them
self.OriginalGetDatabaseAccountStub = global_endpoint_manager._GlobalEndpointManager._GetDatabaseAccountStub
self.OriginalGlobalEndpointManager = global_endpoint_manager._GlobalEndpointManager
self.OriginalExecuteFunction = _retry_utility.ExecuteFunction
# Make azure-cosmos use the MockGlobalEndpointManager
global_endpoint_manager._GlobalEndpointManager = MockGlobalEndpointManager
def tearDown(self):
# Restoring the original objects and functions
global_endpoint_manager._GlobalEndpointManager = self.OriginalGlobalEndpointManager
global_endpoint_manager._GlobalEndpointManager._GetDatabaseAccountStub = self.OriginalGetDatabaseAccountStub
_retry_utility.ExecuteFunction = self.OriginalExecuteFunction
def MockGetDatabaseAccountStub(self, endpoint):
raise exceptions.CosmosHttpResponseError(
status_code=StatusCodes.INTERNAL_SERVER_ERROR, message="Internal Server Error")
def test_global_db_endpoint_discovery_retry_policy(self):
connection_policy = documents.ConnectionPolicy()
connection_policy.EnableEndpointDiscovery = True
write_location_client = cosmos_client.CosmosClient(TestGlobalDBMock.write_location_host,
TestGlobalDBMock.masterKey,
consistency_level="Session",
connection_policy=connection_policy)
write_location_client.client_connection._global_endpoint_manager = MockGlobalEndpointManager(write_location_client.client_connection)
write_location_client.client_connection._global_endpoint_manager.refresh_endpoint_list(None)
self.assertEqual(write_location_client.client_connection.WriteEndpoint,
TestGlobalDBMock.write_location_host)
self.assertEqual(write_location_client.client_connection.WriteEndpoint,
TestGlobalDBMock.read_location_host)
def test_global_db_database_account_unavailable(self):
connection_policy = documents.ConnectionPolicy()
connection_policy.EnableEndpointDiscovery = True
client = cosmos_client.CosmosClient(TestGlobalDBMock.host, TestGlobalDBMock.masterKey,
consistency_level="Session", connection_policy=connection_policy)
client.client_connection._global_endpoint_manager = MockGlobalEndpointManager(client.client_connection)
client.client_connection._global_endpoint_manager.refresh_endpoint_list(None)
self.assertEqual(client.client_connection.WriteEndpoint, TestGlobalDBMock.write_location_host)
self.assertEqual(client.client_connection.ReadEndpoint, TestGlobalDBMock.write_location_host)
global_endpoint_manager._GlobalEndpointManager._GetDatabaseAccountStub = self.MockGetDatabaseAccountStub
client.client_connection.DatabaseAccountAvailable = False
client.client_connection._global_endpoint_manager.refresh_endpoint_list(None)
self.assertEqual(client.client_connection.WriteEndpoint, TestGlobalDBMock.host)
self.assertEqual(client.client_connection.ReadEndpoint, TestGlobalDBMock.host)
if __name__ == '__main__':
unittest.main()
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