private void UpdateRules(AzureTopicMqSettings settings)
{
_receiver.RemoveRule("$default");
settings.AzureSubscriptionRules
.ToList()
.ForEach(x => _receiver.AddRule(x.Key, x.Value));
}
public AzureBusTopicPublisher(AzureTopicMqSettings settings, Action <string> logMessage, Action <string> logError)
{
_settings = settings;
_logMessage = logMessage;
_logError = logError;
_factory = MessagingFactory.CreateFromConnectionString(settings.ConnectionString);
_namespaceManager =
NamespaceManager.CreateFromConnectionString(settings.ConnectionString);
}
public void ReCreate(AzureTopicMqSettings settings, NamespaceManager namespaceManager)
{
var topicPath = settings.TopicNameBuilder(typeof(T));
var subscriptionName = $"{topicPath}.{settings.TopicSubscriberId}";
MakeSureTopicExists(namespaceManager, settings, topicPath);
MakeSureSubscriptionExists(namespaceManager, settings, topicPath, subscriptionName);
UpdateRules(settings);
}
private void MakeSureTopicExists(NamespaceManager namespaceManager, AzureTopicMqSettings settings,
string topicPath)
{
if (!namespaceManager.TopicExists(topicPath))
{
var queueDescription = new TopicDescription(topicPath);
namespaceManager.CreateTopic(settings.TopicBuilderConfig(queueDescription, typeof(T)));
_logMessage($"MakeSureTopicExists: Created topic: {topicPath}");
}
}
internal Binding(
MessagingFactory messagingFactory,
NamespaceManager namespaceManager,
AzureTopicMqSettings settings,
string topicName,
Action <string> logMessage, Action <string> logError)
{
_messagingFactory = messagingFactory;
_logMessage = logMessage;
_logError = logError;
_azureTopicMqSettings = settings;
_excludeTopicsFromLogging = new LoggingConfiguration().ExcludeTopicsFromLogging();
if (!namespaceManager.TopicExists(topicName))
{
var queueDescription = new TopicDescription(topicName);
namespaceManager.CreateTopic(settings.TopicBuilderConfig(queueDescription, typeof(T)));
}
}
public AzureBusTopicSubscriber(AzureTopicMqSettings settings, Action <string> logMessage, Action <string> logError)
{
_settings = settings;
_logMessage = logMessage;
_logError = logError;
_factory = MessagingFactory.CreateFromConnectionString(settings.ConnectionString);
_namespaceManager =
NamespaceManager.CreateFromConnectionString(settings.ConnectionString);
_source = new CancellationTokenSource();
Task.Factory.StartNew(() =>
{
while (!_source.IsCancellationRequested)
{
try
{
var action = _errorActions.Take(_source.Token);
try
{
action.ReCreate(_settings, _namespaceManager);
logMessage($"Recreated subscription.");
}
catch (MessagingEntityAlreadyExistsException exception)
{
logError($"Subscription already exists. {exception}");
}
catch (Exception exception)
{
logError($"Unable to recreate subscription. {exception}");
}
}
catch (OperationCanceledException)
{
logError($"Stopping {nameof(AzureBusTopicSubscriber)}");
}
catch (Exception exception)
{
logError($"Something went wrong while doing error actions ${exception}.");
}
}
}, _source.Token);
}
private void MakeSureSubscriptionExists(NamespaceManager namespaceManager, AzureTopicMqSettings settings,
string topicPath, string subscriptionName, bool removePrevious = false)
{
var subscriptionDescription = new SubscriptionDescription(topicPath, subscriptionName);
if (!namespaceManager.SubscriptionExists(topicPath, subscriptionName))
{
namespaceManager.CreateSubscription(settings.SubscriptionBuilderConfig(subscriptionDescription, typeof(T)));
_logMessage($"MakeSureSubscriptionExists: Created subscription: {subscriptionName}");
}
else
{
if (removePrevious)
{
namespaceManager.DeleteSubscription(topicPath, subscriptionName);
namespaceManager.CreateSubscription(settings.SubscriptionBuilderConfig(subscriptionDescription, typeof(T)));
_logMessage($"MakeSureSubscriptionExists: Deleted and created subscription: {subscriptionName}");
}
}
}
internal Binding(MessagingFactory messagingFactory, NamespaceManager namespaceManager, AzureTopicMqSettings settings, BlockingCollection <IBinding> errorActions, Action <string> logMessage, Action <string> logError)
{
_errorActions = errorActions;
_logError = logError;
_logMessage = logMessage;
_excludeTopicsFromLogging = new LoggingConfiguration().ExcludeTopicsFromLogging();
var topicPath = settings.TopicNameBuilder(typeof(T));
var subscriptionName = $"{topicPath}.{settings.TopicSubscriberId}";
MakeSureTopicExists(namespaceManager, settings, topicPath);
MakeSureSubscriptionExists(namespaceManager, settings, topicPath, subscriptionName, true);
_receiver = messagingFactory.CreateSubscriptionClient(topicPath, subscriptionName);
UpdateRules(settings);
_options = new OnMessageOptions {
AutoComplete = true
};
_options.ExceptionReceived += OptionsOnExceptionReceived;
_receiver.OnMessage(message =>
{
try
{
var bodyStream = message.GetBody <Stream>();
using (var reader = new StreamReader(bodyStream))
{
var body = reader.ReadToEnd();
if (!_excludeTopicsFromLogging.Contains(topicPath))
{
logMessage($"Received '{topicPath}': {body}");
}
Subject.OnNext(JObject.Parse(body)["data"].ToObject <T>());
}
}
catch (Exception ex)
{
logError($"Message {topicPath}': {message} -> consumer error: {ex}");
}
}, _options);
}