public async Task DeleteSubscription(string topicPath, string subscriptionName, SubscriptionMetadata metadata, string sqlFilter, INamespaceManager namespaceManager, string forwardTo)
{
var namespaceManagerAbleToDeleteSubscriptions = namespaceManager as INamespaceManagerAbleToDeleteSubscriptions;
if (namespaceManagerAbleToDeleteSubscriptions == null)
{
return;
}
var subscriptionDescription = new SubscriptionDescription(topicPath, subscriptionName);
// Check subscription with event name only is the one we should delete. If it's reused, then we need to use event full name.
if (await SubscriptionIsReusedAcrossDifferentNamespaces(subscriptionDescription, sqlFilter, namespaceManager).ConfigureAwait(false))
{
logger.Debug("Deleting subscription using event type full name");
subscriptionDescription = new SubscriptionDescription(topicPath, metadata.SubscriptionNameBasedOnEventWithNamespace);
}
// delete subscription based on event name only
await creator.DeleteSubscription(subscriptionDescription.TopicPath, subscriptionDescription.Name, metadata, sqlFilter, namespaceManager, forwardTo).ConfigureAwait(false);
}
public async Task <SubscriptionDescription> Create(string topicPath, string subscriptionName, SubscriptionMetadata metadata, string sqlFilter, INamespaceManager namespaceManager, string forwardTo = null)
{
var subscriptionDescription = await creator.Create(topicPath, subscriptionName, metadata, sqlFilter, namespaceManager, forwardTo).ConfigureAwait(false);
if (await SubscriptionIsReusedAcrossDifferentNamespaces(subscriptionDescription, sqlFilter, namespaceManager).ConfigureAwait(false))
{
logger.Debug("Creating subscription using event type full name");
subscriptionDescription = await creator.Create(topicPath, metadata.SubscriptionNameBasedOnEventWithNamespace, metadata, sqlFilter, namespaceManager, forwardTo).ConfigureAwait(false);
}
return(subscriptionDescription);
}
public async Task <SubscriptionDescription> Create(string topicPath, string subscriptionName, SubscriptionMetadata metadata, string sqlFilter, INamespaceManager namespaceManager, string forwardTo)
{
var meta = metadata as ForwardingTopologySubscriptionMetadata;
if (meta == null)
{
throw new InvalidOperationException($"Cannot create subscription `{subscriptionName}` for topic `{topicPath}` without namespace information required.");
}
var subscriptionDescription = subscriptionDescriptionFactory(topicPath, subscriptionName, settings);
subscriptionDescription.ForwardTo = forwardTo;
subscriptionDescription.UserMetadata = metadata.Description;
try
{
if (!await ExistsAsync(topicPath, subscriptionName, metadata.Description, namespaceManager).ConfigureAwait(false))
{
var ruleDescription = new RuleDescription
{
Filter = new SqlFilter(sqlFilter),
Name = metadata.SubscriptionNameBasedOnEventWithNamespace
};
await namespaceManager.CreateSubscription(subscriptionDescription, ruleDescription).ConfigureAwait(false);
logger.Info($"Subscription '{subscriptionDescription.UserMetadata}' created as '{subscriptionDescription.Name}' with rule '{ruleDescription.Name}' for event '{meta.SubscribedEventFullName}' in namespace '{namespaceManager.Address.Host}'.");
var key = GenerateSubscriptionKey(namespaceManager.Address, subscriptionDescription.TopicPath, subscriptionDescription.Name);
await rememberExistence.AddOrUpdate(key, keyNotFound => Task.FromResult(true), (updateTopicPath, previousValue) => Task.FromResult(true)).ConfigureAwait(false);
}
else
{
logger.Info($"Subscription '{subscriptionDescription.Name}' aka '{subscriptionDescription.UserMetadata}' already exists, skipping creation.");
logger.InfoFormat("Checking if subscription '{0}' in namespace '{1}' needs to be updated.", subscriptionDescription.Name, namespaceManager.Address.Host);
var existingSubscriptionDescription = await namespaceManager.GetSubscription(subscriptionDescription.TopicPath, subscriptionDescription.Name).ConfigureAwait(false);
if (MembersAreNotEqual(existingSubscriptionDescription, subscriptionDescription))
{
logger.Info($"Updating subscription '{subscriptionDescription.Name}' in namespace '{namespaceManager.Address.Host}' with new description.");
await namespaceManager.UpdateSubscription(subscriptionDescription).ConfigureAwait(false);
}
// Rules can't be queried, so try to add
var ruleDescription = new RuleDescription
{
Filter = new SqlFilter(sqlFilter),
Name = metadata.SubscriptionNameBasedOnEventWithNamespace
};
logger.Info($"Adding subscription rule '{ruleDescription.Name}' for event '{meta.SubscribedEventFullName}' in namespace '{namespaceManager.Address.Host}'.");
try
{
var subscriptionClient = SubscriptionClient.CreateFromConnectionString(meta.NamespaceInfo.ConnectionString, topicPath, subscriptionName);
await subscriptionClient.AddRuleAsync(ruleDescription).ConfigureAwait(false);
}
catch (MessagingEntityAlreadyExistsException exception)
{
logger.Debug($"Rule '{ruleDescription.Name}' already exists. Response from the server: '{exception.Message}'.");
}
}
}
catch (MessagingEntityAlreadyExistsException)
{
// the subscription already exists or another node beat us to it, which is ok
logger.Info($"Subscription '{subscriptionDescription.Name}' in namespace '{namespaceManager.Address.Host}' already exists, another node probably beat us to it.");
}
catch (TimeoutException)
{
logger.Info($"Timeout occurred on subscription creation for topic '{subscriptionDescription.TopicPath}' subscription name '{subscriptionDescription.Name}' in namespace '{namespaceManager.Address.Host}' going to validate if it doesn't exist.");
// there is a chance that the timeout occurred, but the topic was still created, check again
if (!await ExistsAsync(subscriptionDescription.TopicPath, subscriptionDescription.Name, metadata.Description, namespaceManager, removeCacheEntry: true).ConfigureAwait(false))
{
throw;
}
logger.Info($"Looks like subscription '{subscriptionDescription.Name}' in namespace '{namespaceManager.Address.Host}' exists anyway.");
}
catch (MessagingException ex)
{
var loggedMessage = $"{(ex.IsTransient ? "Transient" : "Non transient")} {ex.GetType().Name} occurred on subscription '{subscriptionDescription.Name}' creation for topic '{subscriptionDescription.TopicPath}' in namespace '{namespaceManager.Address.Host}'.";
if (!ex.IsTransient)
{
logger.Fatal(loggedMessage, ex);
throw;
}
logger.Info(loggedMessage, ex);
}
return(subscriptionDescription);
}
public async Task DeleteSubscription(string topicPath, string subscriptionName, SubscriptionMetadata metadata, string sqlFilter, INamespaceManager namespaceManager, string forwardTo)
{
var meta = metadata as ForwardingTopologySubscriptionMetadata;
var subscriptionDescription = subscriptionDescriptionFactory(topicPath, subscriptionName, settings);
try
{
if (await ExistsAsync(topicPath, subscriptionName, metadata.Description, namespaceManager, removeCacheEntry: true).ConfigureAwait(false))
{
var ruleDescription = new RuleDescription
{
Filter = new SqlFilter(sqlFilter),
Name = metadata.SubscriptionNameBasedOnEventWithNamespace
};
logger.Info($"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 = $"{(ex.IsTransient ? "Transient" : "Non transient")} {ex.GetType().Name} occurred on subscription '{subscriptionDescription.Name}' deletion for topic '{subscriptionDescription.TopicPath}' in namespace '{namespaceManager.Address.Host}'.";
if (!ex.IsTransient)
{
logger.Fatal(loggedMessage, ex);
throw;
}
logger.Info(loggedMessage, ex);
}
}
public async Task <SubscriptionDescription> Create(string topicPath, string subscriptionName, SubscriptionMetadata metadata, string sqlFilter, INamespaceManager namespaceManager, string forwardTo = null)
{
var subscriptionDescription = subscriptionDescriptionFactory(topicPath, subscriptionName, settings);
if (!string.IsNullOrWhiteSpace(forwardTo))
{
subscriptionDescription.ForwardTo = forwardTo;
}
subscriptionDescription.UserMetadata = metadata.Description;
try
{
if (!await ExistsAsync(topicPath, subscriptionName, metadata.Description, namespaceManager).ConfigureAwait(false))
{
await namespaceManager.CreateSubscription(subscriptionDescription, sqlFilter).ConfigureAwait(false);
logger.Info($"Subscription '{subscriptionDescription.UserMetadata}' in namespace '{namespaceManager.Address.Host}' created as '{subscriptionDescription.Name}'.");
var key = GenerateSubscriptionKey(namespaceManager.Address, subscriptionDescription.TopicPath, subscriptionDescription.Name);
await rememberExistence.AddOrUpdate(key, keyNotFound => Task.FromResult(true), (updateTopicPath, previousValue) => Task.FromResult(true)).ConfigureAwait(false);
}
else
{
logger.Info($"Subscription '{subscriptionDescription.Name}' in namespace '{namespaceManager.Address.Host}' aka '{subscriptionDescription.UserMetadata}' already exists, skipping creation.");
logger.InfoFormat("Checking if subscription '{0}' in namespace '{1}' needs to be updated.", subscriptionDescription.Name, namespaceManager.Address.Host);
var existingSubscriptionDescription = await namespaceManager.GetSubscription(subscriptionDescription.TopicPath, subscriptionDescription.Name).ConfigureAwait(false);
if (MembersAreNotEqual(existingSubscriptionDescription, subscriptionDescription))
{
OverrideImmutableMembers(existingSubscriptionDescription, subscriptionDescription);
logger.InfoFormat("Updating subscription '{0}' in namespace '{1}' with new description.", subscriptionDescription.Name, namespaceManager.Address.Host);
await namespaceManager.UpdateSubscription(subscriptionDescription).ConfigureAwait(false);
}
}
}
catch (MessagingEntityAlreadyExistsException)
{
// the subscription already exists or another node beat us to it, which is ok
logger.InfoFormat("Subscription '{0}' in namespace '{1}' already exists, another node probably beat us to it.", subscriptionDescription.Name, namespaceManager.Address.Host);
}
catch (TimeoutException)
{
logger.InfoFormat("Timeout occurred on subscription creation for topic '{0}' subscription name '{1}' in namespace '{2}' going to validate if it doesn't exist.", subscriptionDescription.TopicPath, subscriptionDescription.Name, namespaceManager.Address.Host);
// there is a chance that the timeout occurred, but the topic was still created, check again
if (!await ExistsAsync(subscriptionDescription.TopicPath, subscriptionDescription.Name, metadata.Description, namespaceManager, removeCacheEntry: true).ConfigureAwait(false))
{
throw;
}
logger.InfoFormat("Looks like subscription '{0}' in namespace '{1}' exists anyway.", subscriptionDescription.Name, namespaceManager.Address.Host);
}
catch (MessagingException ex)
{
var loggedMessage = $"{(ex.IsTransient ? "Transient" : "Non transient")} {ex.GetType().Name} occurred on subscription '{subscriptionDescription.Name}' creation for topic '{subscriptionDescription.TopicPath}' in namespace '{namespaceManager.Address.Host}'.";
if (!ex.IsTransient)
{
logger.Fatal(loggedMessage, ex);
throw;
}
logger.Info(loggedMessage, ex);
}
return(subscriptionDescription);
}
public async Task DeleteSubscription(string topicPath, string subscriptionName, SubscriptionMetadata metadata, string sqlFilter, INamespaceManager namespaceManager, string forwardTo)
{
var subscriptionDescription = subscriptionDescriptionFactory(topicPath, subscriptionName, settings);
try
{
if (await ExistsAsync(topicPath, subscriptionName, metadata.Description, namespaceManager, true).ConfigureAwait(false))
{
var namespaceManagerAbleToDeleteSubscriptions = namespaceManager as INamespaceManagerAbleToDeleteSubscriptions;
if (namespaceManagerAbleToDeleteSubscriptions != null)
{
await namespaceManagerAbleToDeleteSubscriptions.DeleteSubscription(subscriptionDescription).ConfigureAwait(false);
}
}
}
catch (MessagingException ex)
{
var loggedMessage = $"{(ex.IsTransient ? "Transient" : "Non transient")} {ex.GetType().Name} occurred on subscription '{subscriptionDescription.Name}' creation for topic '{subscriptionDescription.TopicPath}' in namespace '{namespaceManager.Address.Host}'.";
if (!ex.IsTransient)
{
logger.Fatal(loggedMessage, ex);
throw;
}
logger.Info(loggedMessage, ex);
}
}
