public async Task <CosmosAccountSettings> InitializeReaderAsync()
{
CosmosAccountSettings databaseAccount = await GlobalEndpointManager.GetDatabaseAccountFromAnyLocationsAsync(
this.serviceEndpoint, this.connectionPolicy.PreferredLocations, this.GetDatabaseAccountAsync);
return(databaseAccount);
}
public async Task InitializeAsync()
{
if (this.AccountSettings == null)
{
this.AccountSettings = await accountSettingsTaskFunc();
}
}
public void ReadLocationRemoveAndAddMockTest()
{
// Setup dummpy read locations for the database account
Collection <CosmosAccountLocation> readableLocations = new Collection <CosmosAccountLocation>();
CosmosAccountLocation writeLocation = new CosmosAccountLocation();
writeLocation.Name = "WriteLocation";
writeLocation.DatabaseAccountEndpoint = "https://writeendpoint.net/";
CosmosAccountLocation readLocation1 = new CosmosAccountLocation();
readLocation1.Name = "ReadLocation1";
readLocation1.DatabaseAccountEndpoint = "https://readendpoint1.net/";
CosmosAccountLocation readLocation2 = new CosmosAccountLocation();
readLocation2.Name = "ReadLocation2";
readLocation2.DatabaseAccountEndpoint = "https://readendpoint2.net/";
readableLocations.Add(writeLocation);
readableLocations.Add(readLocation1);
readableLocations.Add(readLocation2);
CosmosAccountSettings databaseAccount = new CosmosAccountSettings();
databaseAccount.ReadLocationsInternal = readableLocations;
//Setup mock owner "document client"
Mock <IDocumentClientInternal> mockOwner = new Mock <IDocumentClientInternal>();
mockOwner.Setup(owner => owner.ServiceEndpoint).Returns(new Uri("https://defaultendpoint.net/"));
mockOwner.Setup(owner => owner.GetDatabaseAccountInternalAsync(It.IsAny <Uri>(), It.IsAny <CancellationToken>())).ReturnsAsync(databaseAccount);
//Create connection policy and populate preferred locations
ConnectionPolicy connectionPolicy = new ConnectionPolicy();
connectionPolicy.PreferredLocations.Add("ReadLocation1");
connectionPolicy.PreferredLocations.Add("ReadLocation2");
GlobalEndpointManager globalEndpointManager = new GlobalEndpointManager(mockOwner.Object, connectionPolicy);
globalEndpointManager.RefreshLocationAsync(databaseAccount).Wait();
Assert.IsTrue(globalEndpointManager.ReadEndpoints[0] == new Uri(readLocation1.DatabaseAccountEndpoint));
//Remove location 1 from read locations and validate that the read endpoint switches to the next preferred location
readableLocations.Remove(readLocation1);
databaseAccount.ReadLocationsInternal = readableLocations;
globalEndpointManager.RefreshLocationAsync(databaseAccount).Wait();
Assert.IsTrue(globalEndpointManager.ReadEndpoints[0] == new Uri(readLocation2.DatabaseAccountEndpoint));
//Add location 1 back to read locations and validate that location 1 becomes the read endpoint again.
readableLocations.Add(readLocation1);
databaseAccount.ReadLocationsInternal = readableLocations;
//Sleep a bit for the refresh timer to kick in and rediscover location 1
Thread.Sleep(2000);
Assert.IsTrue(globalEndpointManager.ReadEndpoints[0] == new Uri(readLocation1.DatabaseAccountEndpoint));
}
public void EndpointFailureMockTest()
{
// Setup dummpy read locations for the database account
Collection <CosmosAccountLocation> readableLocations = new Collection <CosmosAccountLocation>();
CosmosAccountLocation writeLocation = new CosmosAccountLocation();
writeLocation.Name = "WriteLocation";
writeLocation.DatabaseAccountEndpoint = "https://writeendpoint.net/";
CosmosAccountLocation readLocation1 = new CosmosAccountLocation();
readLocation1.Name = "ReadLocation1";
readLocation1.DatabaseAccountEndpoint = "https://readendpoint1.net/";
CosmosAccountLocation readLocation2 = new CosmosAccountLocation();
readLocation2.Name = "ReadLocation2";
readLocation2.DatabaseAccountEndpoint = "https://readendpoint2.net/";
readableLocations.Add(writeLocation);
readableLocations.Add(readLocation1);
readableLocations.Add(readLocation2);
CosmosAccountSettings databaseAccount = new CosmosAccountSettings();
databaseAccount.ReadLocationsInternal = readableLocations;
//Setup mock owner "document client"
Mock <IDocumentClientInternal> mockOwner = new Mock <IDocumentClientInternal>();
mockOwner.Setup(owner => owner.ServiceEndpoint).Returns(new Uri("https://defaultendpoint.net/"));
mockOwner.Setup(owner => owner.GetDatabaseAccountInternalAsync(It.IsAny <Uri>(), It.IsAny <CancellationToken>())).ReturnsAsync(databaseAccount);
//Create connection policy and populate preferred locations
ConnectionPolicy connectionPolicy = new ConnectionPolicy();
connectionPolicy.PreferredLocations.Add("ReadLocation1");
connectionPolicy.PreferredLocations.Add("ReadLocation2");
GlobalEndpointManager globalEndpointManager = new GlobalEndpointManager(mockOwner.Object, connectionPolicy);
globalEndpointManager.RefreshLocationAsync(databaseAccount).Wait();
Assert.IsTrue(globalEndpointManager.ReadEndpoints[0] == new Uri(readLocation1.DatabaseAccountEndpoint));
//Mark each of the read locations as unavailable and validate that the read endpoint switches to the next preferred region / default endpoint.
globalEndpointManager.MarkEndpointUnavailableForRead(globalEndpointManager.ReadEndpoints[0]);
globalEndpointManager.RefreshLocationAsync(null).Wait();
Assert.IsTrue(globalEndpointManager.ReadEndpoints[0] == new Uri(readLocation2.DatabaseAccountEndpoint));
globalEndpointManager.MarkEndpointUnavailableForRead(globalEndpointManager.ReadEndpoints[0]);
globalEndpointManager.RefreshLocationAsync(null).Wait();
Assert.IsTrue(globalEndpointManager.ReadEndpoints[0] == globalEndpointManager.WriteEndpoints[0]);
//Sleep a second for the unavailable endpoint entry to expire and background refresh timer to kick in
Thread.Sleep(1000);
globalEndpointManager.RefreshLocationAsync(null).Wait();
Assert.IsTrue(globalEndpointManager.ReadEndpoints[0] == new Uri(readLocation1.DatabaseAccountEndpoint));
}
private async Task <CosmosAccountSettings> GetDatabaseAccountAsync(Uri serviceEndpoint)
{
HttpClient httpClient = this.messageHandler == null ? new HttpClient() : new HttpClient(this.messageHandler);
httpClient.DefaultRequestHeaders.Add(HttpConstants.HttpHeaders.Version,
HttpConstants.Versions.CurrentVersion);
// Send client version.
httpClient.AddUserAgentHeader(this.connectionPolicy.UserAgentContainer);
httpClient.AddApiTypeHeader(this.apiType);
string authorizationToken = string.Empty;
if (this.hasAuthKeyResourceToken)
{
authorizationToken = HttpUtility.UrlEncode(this.authKeyResourceToken);
}
else
{
// Retrieve the document service properties.
string xDate = DateTime.UtcNow.ToString("r", CultureInfo.InvariantCulture);
httpClient.DefaultRequestHeaders.Add(HttpConstants.HttpHeaders.XDate, xDate);
INameValueCollection headersCollection = new StringKeyValueCollection();
headersCollection.Add(HttpConstants.HttpHeaders.XDate, xDate);
authorizationToken = AuthorizationHelper.GenerateKeyAuthorizationSignature(
HttpConstants.HttpMethods.Get,
serviceEndpoint,
headersCollection,
this.authKeyHashFunction);
}
httpClient.DefaultRequestHeaders.Add(HttpConstants.HttpHeaders.Authorization, authorizationToken);
using (HttpResponseMessage responseMessage = await httpClient.GetHttpAsync(
serviceEndpoint))
{
using (DocumentServiceResponse documentServiceResponse = await ClientExtensions.ParseResponseAsync(responseMessage))
{
CosmosAccountSettings databaseAccount = documentServiceResponse.GetInternalResource <CosmosAccountSettings>(CosmosAccountSettings.CreateNewInstance);
return(databaseAccount);
}
}
}
public virtual async Task <CosmosAccountSettings> GetDatabaseAccountAsync(HttpRequestMessage requestMessage, CancellationToken cancellationToken = default(CancellationToken))
{
CosmosAccountSettings databaseAccount = null;
// Get the ServiceDocumentResource from the gateway.
using (HttpResponseMessage responseMessage =
await this.gatewayStoreClient.SendHttpAsync(requestMessage, cancellationToken))
{
using (DocumentServiceResponse documentServiceResponse = await ClientExtensions.ParseResponseAsync(responseMessage))
{
databaseAccount = CosmosResource.FromStream <CosmosAccountSettings>(documentServiceResponse);
}
long longValue;
IEnumerable <string> headerValues;
if (responseMessage.Headers.TryGetValues(HttpConstants.HttpHeaders.MaxMediaStorageUsageInMB, out headerValues) &&
(headerValues.Count() != 0))
{
if (long.TryParse(headerValues.First(), out longValue))
{
databaseAccount.MaxMediaStorageUsageInMB = longValue;
}
}
if (responseMessage.Headers.TryGetValues(HttpConstants.HttpHeaders.CurrentMediaStorageUsageInMB, out headerValues) &&
(headerValues.Count() != 0))
{
if (long.TryParse(headerValues.First(), out longValue))
{
databaseAccount.MediaStorageUsageInMB = longValue;
}
}
if (responseMessage.Headers.TryGetValues(HttpConstants.HttpHeaders.DatabaseAccountConsumedDocumentStorageInMB, out headerValues) &&
(headerValues.Count() != 0))
{
if (long.TryParse(headerValues.First(), out longValue))
{
databaseAccount.ConsumedDocumentStorageInMB = longValue;
}
}
if (responseMessage.Headers.TryGetValues(HttpConstants.HttpHeaders.DatabaseAccountProvisionedDocumentStorageInMB, out headerValues) &&
(headerValues.Count() != 0))
{
if (long.TryParse(headerValues.First(), out longValue))
{
databaseAccount.ProvisionedDocumentStorageInMB = longValue;
}
}
if (responseMessage.Headers.TryGetValues(HttpConstants.HttpHeaders.DatabaseAccountReservedDocumentStorageInMB, out headerValues) &&
(headerValues.Count() != 0))
{
if (long.TryParse(headerValues.First(), out longValue))
{
databaseAccount.ReservedDocumentStorageInMB = longValue;
}
}
}
return(databaseAccount);
}