| public static CreateSubscriptionDescription ( string topicPath, string subscriptionName ) : SubscriptionDescription | ||
| topicPath | string | |
| subscriptionName | string | |
| return | SubscriptionDescription | |
public static async Task <SubscriptionDescription> CreateTopicSubscriptionSafeAsync(this NamespaceManager namespaceManager, string subscriptionName,
string topicPath, string queuePath, QueueDescription queueDescription)
{
var description = Defaults.CreateSubscriptionDescription(topicPath, subscriptionName, queueDescription, queuePath);
var create = true;
SubscriptionDescription subscriptionDescription = null;
try
{
subscriptionDescription = await namespaceManager.GetSubscriptionAsync(topicPath, subscriptionName).ConfigureAwait(false);
if (queuePath.Equals(subscriptionDescription.ForwardTo))
{
if (_log.IsDebugEnabled)
{
_log.DebugFormat("Updating subscription: {0} ({1} -> {2})", subscriptionDescription.Name, subscriptionDescription.TopicPath,
subscriptionDescription.ForwardTo);
}
await namespaceManager.UpdateSubscriptionAsync(description).ConfigureAwait(false);
create = false;
}
else
{
if (_log.IsWarnEnabled)
{
_log.WarnFormat("Removing invalid subscription: {0} ({1} -> {2})", subscriptionDescription.Name, subscriptionDescription.TopicPath,
subscriptionDescription.ForwardTo);
}
await namespaceManager.DeleteSubscriptionAsync(topicPath, subscriptionName).ConfigureAwait(false);
}
}
catch (MessagingEntityNotFoundException)
{
}
if (create)
{
var created = false;
try
{
if (_log.IsDebugEnabled)
{
_log.DebugFormat("Creating subscription {0} -> {1}", topicPath, queuePath);
}
subscriptionDescription = await namespaceManager.CreateSubscriptionAsync(description).ConfigureAwait(false);
created = true;
}
catch (MessagingEntityAlreadyExistsException)
{
}
catch (MessagingException mex)
{
if (mex.Message.Contains("(409)"))
{
}
else
{
throw;
}
}
if (!created)
{
subscriptionDescription = await namespaceManager.GetSubscriptionAsync(topicPath, subscriptionName).ConfigureAwait(false);
}
}
if (_log.IsDebugEnabled)
{
_log.DebugFormat("Subscription: {0} ({1} -> {2})", subscriptionDescription.Name, subscriptionDescription.TopicPath,
subscriptionDescription.ForwardTo);
}
return(subscriptionDescription);
}
