async Task <bool> SubscriptionIsReusedAcrossDifferentNamespaces(SubscriptionDescription subscriptionDescription, string sqlFilter, INamespaceManagerInternal namespaceManager)
{
var rules = await namespaceManager.GetRules(subscriptionDescription).ConfigureAwait(false);
if (rules.First().Filter is SqlFilter filter && 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, SubscriptionMetadataInternal metadata, string sqlFilter, INamespaceManagerInternal namespaceManager, string forwardTo)
{
var meta = metadata as ForwardingTopologySubscriptionMetadata;
// var subscriptionDescription = subscriptionDescriptionFactory(topicPath, subscriptionName, settings);
var subscriptionDescription = new SubscriptionDescription(topicPath, subscriptionName);
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($"Removing subscription rule '{ruleDescription.Name}' for event '{meta.SubscribedEventFullName}'.");
var subscriptionClient = SubscriptionClient.CreateFromConnectionString(meta.NamespaceInfo.ConnectionString, topicPath, subscriptionName);
await subscriptionClient.RemoveRuleAsync(ruleDescription.Name).ConfigureAwait(false);
var remainingRules = await namespaceManager.GetRules(subscriptionDescription).ConfigureAwait(false);
if (!remainingRules.Any())
{
await namespaceManager.DeleteSubscription(subscriptionDescription).ConfigureAwait(false);
logger.Debug($"Subscription '{metadata.Description}' created as '{subscriptionDescription.Name}' was removed as part of unsubscribe since events are subscribed to.");
}
}
}
catch (MessagingException ex)
{
var loggedMessage = $"{(ex.IsTransient ? "Transient" : "Non transient")} {ex.GetType().Name} occurred on subscription '{subscriptionDescription.Name}' deletion for topic '{subscriptionDescription.TopicPath}' in namespace '{namespaceManager.Address.Host}'.";
if (!ex.IsTransient)
{
logger.Fatal(loggedMessage, ex);
throw;
}
logger.Info(loggedMessage, ex);
}
}
async Task <bool> SubscriptionIsReusedAcrossDifferentNamespaces(SubscriptionDescription subscriptionDescription, string sqlFilter, INamespaceManagerInternal namespaceManager)
{
var foundRules = await namespaceManager.GetRules(subscriptionDescription).ConfigureAwait(false);
var rules = foundRules as RuleDescription[] ?? foundRules.ToArray();
if (rules.First().Filter is SqlFilter filter)
{
if (!filter.SqlExpression.Contains(sqlFilter))
{
logger.Debug("Looks like this subscription name is already taken as the sql filter does not match the subscribed event name.");
return(true);
}
if (sqlFilter.Length != filter.SqlExpression.Length && rules.Length == 1)
{
logger.Info($"SQL filter of the existing subscription '{subscriptionDescription.Name}' should be optimized.\nUpdate Rule filter from \"{filter.SqlExpression}\" to \"{sqlFilter}\".");
}
}
return(false);
}