/// <summary>
/// Creates a specific queue if it doesn't exist in the target namespace.
/// </summary>
/// <param name="sbNamespace">The <see cref="IServiceBusNamespace"/> where we are creating the queue in.</param>
/// <param name="name">The name of the queue that we are looking for.</param>
/// <returns>The <see cref="IQueue"/> entity object that references the Azure queue.</returns>
public static async Task <IQueue> CreateQueueIfNotExists(this IServiceBusNamespace sbNamespace, string name)
{
var queue = await sbNamespace.GetQueueByNameAsync(name);
if (queue != null)
{
return(queue);
}
try
{
return(await sbNamespace.Queues
.Define(name.ToLowerInvariant())
.WithMessageLockDurationInSeconds(60)
.WithDuplicateMessageDetection(TimeSpan.FromMinutes(10))
.WithExpiredMessageMovedToDeadLetterQueue()
.WithMessageMovedToDeadLetterQueueOnMaxDeliveryCount(10)
.CreateAsync());
}
catch (CloudException ce)
when(ce.Response.StatusCode == HttpStatusCode.BadRequest &&
ce.Message.Contains("SubCode=40000. The value for the requires duplicate detection property of an existing Queue cannot be changed"))
{
// Create queue race condition occurred. Return existing queue.
return(await sbNamespace.GetQueueByNameAsync(name));
}
}
