public async Task <SubscriptionDescription> Create(string topicPath, string subscriptionName, SubscriptionMetadataInternal metadata, string sqlFilter, INamespaceManagerInternal namespaceManager, string forwardTo = null)
{
var subscriptionDescription = new SubscriptionDescription(topicPath, subscriptionName)
{
EnableBatchedOperations = subscriptionSettings.EnableBatchedOperations,
AutoDeleteOnIdle = subscriptionSettings.AutoDeleteOnIdle,
DefaultMessageTimeToLive = subscriptionSettings.DefaultMessageTimeToLive,
EnableDeadLetteringOnFilterEvaluationExceptions = subscriptionSettings.EnableDeadLetteringOnFilterEvaluationExceptions,
EnableDeadLetteringOnMessageExpiration = subscriptionSettings.EnableDeadLetteringOnMessageExpiration,
LockDuration = subscriptionSettings.LockDuration,
MaxDeliveryCount = DefaultMaxDeliveryCountForNoImmediateRetries
};
if (subscriptionSettings.ForwardDeadLetteredMessagesToCondition(SubscriptionClient.FormatSubscriptionPath(topicPath, subscriptionName)))
{
subscriptionDescription.ForwardDeadLetteredMessagesTo = subscriptionSettings.ForwardDeadLetteredMessagesTo;
}
subscriptionSettings.DescriptionCustomizer(subscriptionDescription);
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($"Subscription '{subscriptionDescription.UserMetadata}' in namespace '{namespaceManager.Address.Host}' created as '{subscriptionDescription.Name}'.");
var key = GenerateSubscriptionKey(namespaceManager.Address, subscriptionDescription.TopicPath, subscriptionDescription.Name);
await rememberExistence.AddOrUpdate(key, keyNotFound => TaskEx.CompletedTrue, (updateTopicPath, previousValue) => TaskEx.CompletedTrue).ConfigureAwait(false);
}
else
{
logger.Info($"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 = $"{(ex.IsTransient ? "Transient" : "Non transient")} {ex.GetType().Name} occurred on subscription '{subscriptionDescription.Name}' creation for topic '{subscriptionDescription.TopicPath}' in namespace '{namespaceManager.Address.Host}'.";
if (!ex.IsTransient)
{
logger.Fatal(loggedMessage, ex);
throw;
}
logger.Info(loggedMessage, ex);
}
return(subscriptionDescription);
}
public async Task <SubscriptionDescription> Create(string topicPath, string subscriptionName, SubscriptionMetadataInternal metadata, string sqlFilter, INamespaceManagerInternal namespaceManager, string forwardTo)
{
if (!(metadata is ForwardingTopologySubscriptionMetadata meta))
{
throw new InvalidOperationException($"Cannot create subscription `{subscriptionName}` for topic `{topicPath}` without namespace information required.");
}
var subscriptionDescription = new SubscriptionDescription(topicPath, subscriptionName)
{
EnableBatchedOperations = subscriptionSettings.EnableBatchedOperations,
AutoDeleteOnIdle = subscriptionSettings.AutoDeleteOnIdle,
DefaultMessageTimeToLive = subscriptionSettings.DefaultMessageTimeToLive,
EnableDeadLetteringOnFilterEvaluationExceptions = subscriptionSettings.EnableDeadLetteringOnFilterEvaluationExceptions,
EnableDeadLetteringOnMessageExpiration = subscriptionSettings.EnableDeadLetteringOnMessageExpiration,
LockDuration = subscriptionSettings.LockDuration,
MaxDeliveryCount = DefaultMaxDeliveryCountForNoImmediateRetries
};
if (subscriptionSettings.ForwardDeadLetteredMessagesToCondition(SubscriptionClient.FormatSubscriptionPath(topicPath, subscriptionName)))
{
subscriptionDescription.ForwardDeadLetteredMessagesTo = subscriptionSettings.ForwardDeadLetteredMessagesTo;
}
subscriptionSettings.DescriptionCustomizer(subscriptionDescription);
subscriptionDescription.ForwardTo = forwardTo;
subscriptionDescription.UserMetadata = metadata.Description;
try
{
var exists = await ExistsAsync(topicPath, subscriptionName, metadata.Description, namespaceManager).ConfigureAwait(false);
if (!exists)
{
var ruleDescription = new RuleDescription
{
Filter = new SqlFilter(sqlFilter),
Name = metadata.SubscriptionNameBasedOnEventWithNamespace
};
try
{
await namespaceManager.CreateSubscription(subscriptionDescription, ruleDescription).ConfigureAwait(false);
logger.Info($"Subscription '{subscriptionDescription.UserMetadata}' created as '{subscriptionDescription.Name}' with rule '{ruleDescription.Name}' for event '{meta.SubscribedEventFullName}' in namespace '{namespaceManager.Address.Host}'.");
var key = GenerateSubscriptionKey(namespaceManager.Address, subscriptionDescription.TopicPath, subscriptionDescription.Name);
await rememberExistence.AddOrUpdate(key, keyNotFound => TaskEx.CompletedTrue, (updateTopicPath, previousValue) => TaskEx.CompletedTrue).ConfigureAwait(false);
}
catch (MessagingEntityAlreadyExistsException)
{
// the subscription already exists or another node beat us to it, which is ok
logger.Info($"Subscription '{subscriptionDescription.Name}' in namespace '{namespaceManager.Address.Host}' already exists, another node probably beat us to it.");
exists = true;
}
}
if (exists)
{
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 (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);
}
