async Task <bool> SubscriptionIsReusedAcrossDifferentNamespaces(SubscriptionDescription subscriptionDescription, string sqlFilter, INamespaceManager namespaceManager)
{
var rules = await namespaceManager.GetRules(subscriptionDescription).ConfigureAwait(false);
var filter = rules.First().Filter as SqlFilter;
if (filter != null && filter.SqlExpression != sqlFilter)
{
logger.Debug("Looks like this subscription name is already taken as the sql filter does not match the subscribed event name.");
return(true);
}
return(false);
}
public async Task DeleteSubscription(string topicPath, string subscriptionName, SubscriptionMetadata metadata, string sqlFilter, INamespaceManager namespaceManager, string forwardTo)
{
var meta = metadata as ForwardingTopologySubscriptionMetadata;
var subscriptionDescription = subscriptionDescriptionFactory(topicPath, subscriptionName, settings);
try
{
if (await ExistsAsync(topicPath, subscriptionName, metadata.Description, namespaceManager, removeCacheEntry: true).ConfigureAwait(false))
{
var ruleDescription = new RuleDescription
{
Filter = new SqlFilter(sqlFilter),
Name = metadata.SubscriptionNameBasedOnEventWithNamespace
};
logger.Info($"Removing subscription rule '{ruleDescription.Name}' for event '{meta.SubscribedEventFullName}'.");
var subscriptionClient = SubscriptionClient.CreateFromConnectionString(meta.NamespaceInfo.ConnectionString, topicPath, subscriptionName);
await subscriptionClient.RemoveRuleAsync(ruleDescription.Name).ConfigureAwait(false);
var remainingRules = await namespaceManager.GetRules(subscriptionDescription).ConfigureAwait(false);
var namespaceManagerThatCanDelete = namespaceManager as INamespaceManagerAbleToDeleteSubscriptions;
if (!remainingRules.Any() && namespaceManagerThatCanDelete != null)
{
await namespaceManagerThatCanDelete.DeleteSubscription(subscriptionDescription).ConfigureAwait(false);
logger.Debug($"Subscription '{subscriptionDescription.UserMetadata}' created as '{subscriptionDescription.Name}' was removed as part of unsubscribe since events are subscribed to.");
}
}
}
catch (MessagingException ex)
{
var loggedMessage = $"{(ex.IsTransient ? "Transient" : "Non transient")} {ex.GetType().Name} occurred on subscription '{subscriptionDescription.Name}' deletion for topic '{subscriptionDescription.TopicPath}' in namespace '{namespaceManager.Address.Host}'.";
if (!ex.IsTransient)
{
logger.Fatal(loggedMessage, ex);
throw;
}
logger.Info(loggedMessage, ex);
}
}