CloudQueuesProviderQueueExistsAsync Method |
This API is preliminary and subject to change.
Checks for the existence of a queue with a particular name.
Namespace: net.openstack.Providers.RackspaceAssembly: openstacknet (in openstacknet.dll) Version: 1.7.7+Branch.master.Sha.25d803f397c8693c2c13777ef6675f796f520f2c
Syntax public Task<bool> QueueExistsAsync(
QueueName queueName,
CancellationToken cancellationToken
)
Public Function QueueExistsAsync (
queueName As QueueName,
cancellationToken As CancellationToken
) As Task(Of Boolean)
public:
virtual Task<bool>^ QueueExistsAsync(
QueueName^ queueName,
CancellationToken cancellationToken
) sealed
abstract QueueExistsAsync :
queueName : QueueName *
cancellationToken : CancellationToken -> Task<bool>
override QueueExistsAsync :
queueName : QueueName *
cancellationToken : CancellationToken -> Task<bool>
Parameters
- queueName
- Type: net.openstack.Core.Domain.QueuesQueueName
The queue name. - cancellationToken
- Type: System.ThreadingCancellationToken
The CancellationToken that the task will observe.
Return Value
Type:
TaskBooleanA
Task object representing the asynchronous operation. When the task completes successfully, the
Result property will contain
if queue with the specified name exists; otherwise,
.
Implements
IQueueingServiceQueueExistsAsync(QueueName, CancellationToken)Exceptions Examples The following example demonstrates the use of this method using the CloudQueuesProvider
implementation of the IQueueingService. For more information about creating the provider, see
CloudQueuesProvider(CloudIdentity, String, Guid, Boolean, IIdentityProvider).
Note |
---|
The following code uses the / operators. For more information
about using these operators in your code, see Asynchronous Services.
|
IQueueingService queueingService = new CloudQueuesProvider(identity, region, clientId, internalUrl, identityProvider);
QueueName queueName = new QueueName("ExampleQueue");
bool exists = await queueingService.QueueExistsAsync(queueName, CancellationToken.None);
Dim queueingService As IQueueingService = New CloudQueuesProvider(identity, region, clientId, internalUrl, identityProvider)
Dim queueName = New QueueName("ExampleQueue")
Dim exists = Await queueingService.QueueExistsAsync(queueName, CancellationToken.None)
No code example is currently available or this language may not be supported.
let queueingService = new CloudQueuesProvider(identity, region, clientId, internalUrl, identityProvider)
let queueName = new QueueName("ExampleQueue")
let! exists = queueingService.QueueExistsAsync(queueName, CancellationToken.None) |> Async.AwaitTask
The following code shows demonstrates the same example using the
Task Parallel Library
instead of the / operators.
IQueueingService queueingService = new CloudQueuesProvider(identity, region, clientId, internalUrl, identityProvider);
QueueName queueName = new QueueName("ExampleQueue");
Task<bool> task = queueingService.QueueExistsAsync(queueName, CancellationToken.None);
Dim queueingService As IQueueingService = New CloudQueuesProvider(identity, region, clientId, internalUrl, identityProvider)
Dim queueName = New QueueName("ExampleQueue")
Dim task = queueingService.QueueExistsAsync(queueName, CancellationToken.None)
IQueueingService^ queueingService = gcnew CloudQueuesProvider(identity, region, clientId, internalUrl, identityProvider);
QueueName^ queueName = gcnew QueueName("ExampleQueue");
Task<bool>^ task = queueingService->QueueExistsAsync(queueName, CancellationToken::None);
let queueingService = new CloudQueuesProvider(identity, region, clientId, internalUrl, identityProvider)
let queueName = new QueueName("ExampleQueue")
let task = queueingService.QueueExistsAsync(queueName, CancellationToken.None)
Version Information .NET Framework
Supported in: 4.5
openstack.net
Supported in: 1.6, 1.5, 1.4, 1.3.6
See Also