public static void SetupStrongAccountProperties(
Mock <IHttpHandler> mockHttpClientHandler,
string accountName,
string endpoint,
IList <AccountRegion> writeRegions,
IList <AccountRegion> readRegions)
{
HttpResponseMessage httpResponseMessage = MockSetupsHelper.CreateStrongAccount(
accountName,
writeRegions,
readRegions);
Uri endpointUri = new Uri(endpoint);
mockHttpClientHandler.Setup(x => x.SendAsync(
It.Is <HttpRequestMessage>(x => x.RequestUri == endpointUri),
It.IsAny <CancellationToken>()))
.Returns <HttpRequestMessage, CancellationToken>((request, cancellationToken) => Task.FromResult(httpResponseMessage));
}
public async Task TestHttpRequestExceptionScenarioAsync()
{
// testhost.dll.config sets it to 2 seconds which causes it to always expire before retrying. Remove the override.
System.Configuration.ConfigurationManager.AppSettings["UnavailableLocationsExpirationTimeInSeconds"] = "500";
string accountName = nameof(TestHttpRequestExceptionScenarioAsync);
string primaryRegionNameForUri = "eastus";
string secondaryRegionNameForUri = "westus";
string globalEndpoint = $"https://{accountName}.documents.azure.com:443/";
Uri globalEndpointUri = new Uri(globalEndpoint);
string primaryRegionEndpoint = $"https://{accountName}-{primaryRegionNameForUri}.documents.azure.com";
string secondaryRegionEndpiont = $"https://{accountName}-{secondaryRegionNameForUri}.documents.azure.com";
string databaseName = "testDb";
string containerName = "testContainer";
string containerRid = "ccZ1ANCszwk=";
ResourceId containerResourceId = ResourceId.Parse(containerRid);
List <AccountRegion> writeRegion = new List <AccountRegion>()
{
new AccountRegion()
{
Name = "East US",
Endpoint = $"{primaryRegionEndpoint}:443/"
}
};
List <AccountRegion> readRegions = new List <AccountRegion>()
{
new AccountRegion()
{
Name = "East US",
Endpoint = $"{primaryRegionEndpoint}:443/"
},
new AccountRegion()
{
Name = "West US",
Endpoint = $"{secondaryRegionEndpiont}:443/"
}
};
List <AccountRegion> writeRegionFailedOver = new List <AccountRegion>()
{
new AccountRegion()
{
Name = "West US",
Endpoint = $"{secondaryRegionEndpiont}:443/"
}
};
List <AccountRegion> readRegionsFailedOver = new List <AccountRegion>()
{
new AccountRegion()
{
Name = "West US",
Endpoint = $"{secondaryRegionEndpiont}:443/"
},
new AccountRegion()
{
Name = "East US",
Endpoint = $"{primaryRegionEndpoint}:443/"
},
};
// Create a mock http handler to inject gateway responses.
// MockBehavior.Strict ensures that only the mocked APIs get called
Mock <IHttpHandler> mockHttpHandler = new Mock <IHttpHandler>(MockBehavior.Strict);
mockHttpHandler.Setup(x => x.SendAsync(
It.Is <HttpRequestMessage>(m => m.RequestUri == globalEndpointUri || m.RequestUri.ToString().Contains(primaryRegionNameForUri)),
It.IsAny <CancellationToken>())).Throws(new HttpRequestException("Mock HttpRequestException to simulate region being down"));
int count = 0;
mockHttpHandler.Setup(x => x.SendAsync(
It.Is <HttpRequestMessage>(x => x.RequestUri == new Uri(secondaryRegionEndpiont)),
It.IsAny <CancellationToken>()))
.Returns <HttpRequestMessage, CancellationToken>((request, cancellationToken) =>
{
// Simulate the legacy gateway being down. After 40 requests simulate the write region pointing to new location.
count++;
if (count < 2)
{
return(Task.FromResult(MockSetupsHelper.CreateStrongAccount(accountName, writeRegion, readRegions)));
}
else
{
return(Task.FromResult(MockSetupsHelper.CreateStrongAccount(accountName, writeRegionFailedOver, readRegionsFailedOver)));
}
});
MockSetupsHelper.SetupContainerProperties(
mockHttpHandler: mockHttpHandler,
regionEndpoint: secondaryRegionEndpiont,
databaseName: databaseName,
containerName: containerName,
containerRid: containerRid);
MockSetupsHelper.SetupPartitionKeyRanges(
mockHttpHandler: mockHttpHandler,
regionEndpoint: secondaryRegionEndpiont,
containerResourceId: containerResourceId,
partitionKeyRangeIds: out IReadOnlyList <string> secondaryRegionPartitionKeyRangeIds);
MockSetupsHelper.SetupAddresses(
mockHttpHandler: mockHttpHandler,
partitionKeyRangeId: secondaryRegionPartitionKeyRangeIds.First(),
regionEndpoint: secondaryRegionEndpiont,
regionName: secondaryRegionNameForUri,
containerResourceId: containerResourceId,
primaryReplicaUri: out TransportAddressUri secondaryRegionprimaryReplicaUri);
Mock <TransportClient> mockTransport = new Mock <TransportClient>(MockBehavior.Strict);
MockSetupsHelper.SetupRequestTimeoutException(
mockTransport,
secondaryRegionprimaryReplicaUri);
// Partition key ranges are the same in both regions so the SDK
// does not need to go the secondary to get the partition key ranges.
// Only the addresses need to be mocked on the secondary
MockSetupsHelper.SetupAddresses(
mockHttpHandler: mockHttpHandler,
partitionKeyRangeId: secondaryRegionPartitionKeyRangeIds.First(),
regionEndpoint: secondaryRegionEndpiont,
regionName: secondaryRegionNameForUri,
containerResourceId: containerResourceId,
primaryReplicaUri: out TransportAddressUri secondaryRegionPrimaryReplicaUri);
MockSetupsHelper.SetupCreateItemResponse(
mockTransport,
secondaryRegionPrimaryReplicaUri);
CosmosClientOptions cosmosClientOptions = new CosmosClientOptions()
{
EnablePartitionLevelFailover = true,
ConsistencyLevel = Cosmos.ConsistencyLevel.Strong,
ApplicationPreferredRegions = new List <string>()
{
Regions.EastUS,
Regions.WestUS
},
HttpClientFactory = () => new HttpClient(new HttpHandlerHelper(mockHttpHandler.Object)),
TransportClientHandlerFactory = (original) => mockTransport.Object,
};
using (CosmosClient customClient = new CosmosClient(
globalEndpoint,
Convert.ToBase64String(Encoding.UTF8.GetBytes(Guid.NewGuid().ToString())),
cosmosClientOptions))
{
Container container = customClient.GetContainer(databaseName, containerName);
ToDoActivity toDoActivity = new ToDoActivity()
{
Id = "TestItem",
Pk = "TestPk"
};
ItemResponse <ToDoActivity> response = await container.CreateItemAsync(toDoActivity, new Cosmos.PartitionKey(toDoActivity.Pk));
Assert.AreEqual(HttpStatusCode.Created, response.StatusCode);
mockTransport.VerifyAll();
mockHttpHandler.VerifyAll();
// Clears all the setups. No network calls should be done on the next operation.
mockHttpHandler.Reset();
mockTransport.Reset();
MockSetupsHelper.SetupCreateItemResponse(
mockTransport,
secondaryRegionPrimaryReplicaUri);
ToDoActivity toDoActivity2 = new ToDoActivity()
{
Id = "TestItem2",
Pk = "TestPk"
};
response = await container.CreateItemAsync(toDoActivity2, new Cosmos.PartitionKey(toDoActivity2.Pk));
Assert.AreEqual(HttpStatusCode.Created, response.StatusCode);
mockTransport.Setup(x => x.Dispose());
// Reset it back to the override to avoid impacting other tests.
System.Configuration.ConfigurationManager.AppSettings["UnavailableLocationsExpirationTimeInSeconds"] = "2";
}
await Task.Delay(TimeSpan.FromMinutes(2));
}
