public async Task <QueueDescription> Create(string queuePath, INamespaceManager namespaceManager)
{
var description = descriptionFactory(queuePath, settings);
try
{
if (!await ExistsAsync(namespaceManager, description.Path).ConfigureAwait(false))
{
await namespaceManager.CreateQueue(description).ConfigureAwait(false);
logger.InfoFormat("Queue '{0}' created in namespace '{1}'.", description.Path, namespaceManager.Address.Host);
var key = GenerateQueueKey(namespaceManager, queuePath);
await rememberExistence.AddOrUpdate(key, s => Task.FromResult(true), (s, b) => Task.FromResult(true)).ConfigureAwait(false);
}
else
{
logger.InfoFormat("Queue '{0}' in namespace '{1}' already exists, skipping creation.", description.Path, namespaceManager.Address.Host);
logger.InfoFormat("Checking if queue '{0}' in namespace '{1}' needs to be updated.", description.Path, namespaceManager.Address.Host);
if (IsSystemQueue(description.Path))
{
logger.InfoFormat("Queue '{0}' in '{1}' is a shared queue and should not be updated.", description.Path, namespaceManager.Address.Host);
return(description);
}
var existingDescription = await namespaceManager.GetQueue(description.Path).ConfigureAwait(false);
if (MembersAreNotEqual(existingDescription, description))
{
OverrideImmutableMembers(existingDescription, description);
logger.InfoFormat("Updating queue '{0}' in namespace '{1}' with new description.", description.Path, namespaceManager.Address.Host);
await namespaceManager.UpdateQueue(description).ConfigureAwait(false);
}
}
}
catch (MessagingEntityAlreadyExistsException)
{
// the queue already exists or another node beat us to it, which is ok
logger.InfoFormat("Queue '{0}' in namespace '{1}' already exists, another node probably beat us to it.", description.Path, namespaceManager.Address.Host);
}
catch (TimeoutException)
{
logger.InfoFormat("Timeout occurred on queue creation for '{0}' in namespace '{1}' going to validate if it doesn't exist.", description.Path, namespaceManager.Address.Host);
// there is a chance that the timeout occurred, but the topic was still created, check again
if (!await ExistsAsync(namespaceManager, description.Path, removeCacheEntry: true).ConfigureAwait(false))
{
throw;
}
logger.InfoFormat("Looks like queue '{0}' in namespace '{1}' exists anyway.", description.Path, namespaceManager.Address.Host);
}
catch (MessagingException ex)
{
if (!ex.IsTransient)
{
logger.Fatal(string.Format("{1} {2} occurred on queue creation '{0}' in namespace '{3}'.", description.Path, (ex.IsTransient ? "Transient" : "Non transient"), ex.GetType().Name, namespaceManager.Address.Host), ex);
throw;
}
logger.Info(string.Format("{1} {2} occurred on queue creation '{0}' in namespace '{3}'.", description.Path, (ex.IsTransient ? "Transient" : "Non transient"), ex.GetType().Name, namespaceManager.Address.Host), ex);
}
return(description);
}