private void TryCreateIndex(IndexKeysDefinition <MessageJournalEntryDocument> indexKeys, string name = null)
{
var options = new CreateIndexOptions
{
Name = name
};
if (_collationSupported)
{
options.Collation = _collation;
}
try
{
_messageJournalEntries.Indexes.CreateOne(indexKeys, options);
_diagnosticService.Emit(new MongoDBEventBuilder(this, MongoDBEventType.IndexCreated)
{
DatabaseName = _messageJournalEntries.Database.DatabaseNamespace.DatabaseName,
CollectionName = _messageJournalEntries.CollectionNamespace.CollectionName,
IndexName = name ?? indexKeys.ToString()
}.Build());
}
catch (Exception e)
{
_diagnosticService.Emit(new MongoDBEventBuilder(this, MongoDBEventType.IndexCreationFailed)
{
DatabaseName = _messageJournalEntries.Database.DatabaseNamespace.DatabaseName,
CollectionName = _messageJournalEntries.CollectionNamespace.CollectionName,
IndexName = name ?? indexKeys.ToString(),
Exception = e
}.Build());
}
}
private void CloseManagedConnection(ManagedConnection connection)
{
if (connection == null)
{
return;
}
try
{
connection.CloseManagedConnection(true);
return;
}
catch (Exception ex)
{
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQConnectionError)
{
Detail = "Unhandled exception closing managed connection ID " + connection.ManagedConnectionId,
Exception = ex
}.Build());
}
try
{
connection.Abort();
}
catch (Exception ex)
{
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQConnectionError)
{
Detail = "Unhandled exception aborting managed connection ID " + connection.ManagedConnectionId,
Exception = ex
}.Build());
}
}
private async Task <MessageJournalReadResult> ReadNext(CancellationToken cancellationToken, MessageJournalPosition current)
{
MessageJournalReadResult readResult = null;
try
{
readResult = await _messageJournal.Read(current, _batchSize, _filter, cancellationToken);
}
catch (OperationCanceledException)
{
throw;
}
catch (Exception ex)
{
_diagnosticService.Emit(new DiagnosticEventBuilder(this, DiagnosticEventType.UnhandledException)
{
Detail = "Error reading message journal",
Exception = ex
}.Build());
if (_rethrowExceptions)
{
throw;
}
}
return(readResult);
}
public DbConnection GetConnection()
{
CheckDisposed();
var myConnection = _connection;
if (myConnection != null && myConnection.State == ConnectionState.Open)
{
return(myConnection);
}
lock (_syncRoot)
{
if (myConnection != null && myConnection.State == ConnectionState.Broken)
{
try
{
myConnection.Close();
_diagnosticService.Emit(new SQLEventBuilder(this, SQLEventType.SQLConnectionClosed)
{
ConnectionName = _connectionStringSettings.Name
}.Build());
}
catch (Exception ex)
{
_diagnosticService.Emit(new SQLEventBuilder(this, SQLEventType.SQLCommandError)
{
Detail = "Error closing singleton connection",
ConnectionName = _connectionStringSettings.Name,
Exception = ex
}.Build());
}
myConnection = null;
}
if (myConnection == null)
{
myConnection = _dbProviderFactory.CreateConnection();
if (myConnection != null)
{
myConnection.ConnectionString = _connectionStringSettings.ConnectionString;
}
}
if (myConnection != null && myConnection.State == ConnectionState.Closed)
{
myConnection.Open();
_diagnosticService.Emit(new SQLEventBuilder(this, SQLEventType.SQLConnectionOpened)
{
ConnectionName = _connectionStringSettings.Name
}.Build());
}
_connection = myConnection;
}
return(myConnection);
}
/// <summary>
/// Initializes a new <see cref="MulticastSubscriptionTrackingService"/> decorating the
/// specified <paramref name="inner"/> <see cref="ISubscriptionTrackingService"/>
/// configured to broadcast and consume changes over the multicast group at the specified
/// <paramref name="groupAddress"/>.
/// </summary>
/// <param name="inner">The underlying subscription tracking service used to persist or
/// maintain subscription state</param>
/// <param name="groupAddress">The address of the multicast group to join</param>
/// <param name="port">The local port to bind to</param>
/// <param name="diagnosticService">(Optional) The service through which diagnostic events
/// are reported and processed</param>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="inner"/> or
/// <paramref name="groupAddress"/> is <c>null</c></exception>
/// <exception cref="ArgumentException">Thrown if <paramref name="groupAddress"/> does not
/// specify a compatible <see cref="AddressFamily"/></exception>
/// <exception cref="SocketException">Thrown if there is an error joining the multicast
/// group, i.e. due to an invalid multicast address.</exception>
/// <remarks>
/// The multicast group <paramref name="groupAddress"/> must be on the 224.0.0/4 subnet
/// </remarks>
public MulticastSubscriptionTrackingService(ISubscriptionTrackingService inner, IPAddress groupAddress, int port, IDiagnosticService diagnosticService = null)
{
_nodeId = NodeId.Generate();
_inner = inner ?? throw new ArgumentNullException(nameof(inner));
_groupAddress = groupAddress ?? throw new ArgumentNullException(nameof(groupAddress));
_port = port;
_diagnosticService = diagnosticService ?? DiagnosticService.DefaultInstance;
_broadcastClient = new UdpClient
{
ExclusiveAddressUse = false
};
_broadcastClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
_broadcastClient.JoinMulticastGroup(groupAddress, IPAddress.Any);
_broadcastClient.Ttl = 2;
_broadcastClient.Client.Bind(new IPEndPoint(IPAddress.Any, 0));
var broadcastBinding = (IPEndPoint)_broadcastClient.Client.LocalEndPoint;
_diagnosticService.Emit(new MulticastEventBuilder(this, MulticastEventType.BroadcastSocketBound)
{
Node = _nodeId.ToString(),
Host = broadcastBinding.Address.ToString(),
Port = broadcastBinding.Port
}.Build());
_listenerClient = new UdpClient
{
ExclusiveAddressUse = false
};
_listenerClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
_listenerClient.JoinMulticastGroup(groupAddress, IPAddress.Any);
_listenerClient.Client.Bind(new IPEndPoint(IPAddress.Any, _port));
var listenerBinding = (IPEndPoint)_listenerClient.Client.LocalEndPoint;
_diagnosticService.Emit(new MulticastEventBuilder(this, MulticastEventType.ListenerSocketBound)
{
Node = _nodeId.ToString(),
Host = listenerBinding.Address.ToString(),
Port = listenerBinding.Port
}.Build());
_cancellationTokenSource = new CancellationTokenSource();
_receiveResultQueue = new ActionBlock <UdpReceiveResult>(HandleReceiveResult,
new ExecutionDataflowBlockOptions
{
MaxDegreeOfParallelism = 2
});
_listenTask = Task.Run(async() => await Listen(_cancellationTokenSource.Token));
_diagnosticService.Emit(new MulticastEventBuilder(this, MulticastEventType.ListenerStarted)
{
Node = _nodeId.ToString(),
Host = listenerBinding.Address.ToString(),
Port = listenerBinding.Port
}.Build());
}
/// <summary>
/// Called by the <see cref="Dispose()"/> method or finalizer to ensure that
/// resources are released
/// </summary>
/// <param name="disposing">Indicates whether this method is called from the
/// <see cref="Dispose()"/> method (<c>true</c>) or the finalizer (<c>false</c>)</param>
/// <remarks>
/// This method will not be called more than once
/// </remarks>
protected virtual void Dispose(bool disposing)
{
_httpListener.Stop();
_cancellationTokenSource.Cancel();
_listenTask.Wait(TimeSpan.FromSeconds(30));
if (!disposing)
{
return;
}
_cancellationTokenSource.Dispose();
try
{
_httpListener.Close();
_diagnosticService.Emit(
new HttpEventBuilder(this, HttpEventType.HttpServerStopped)
{
Uri = _baseUri
}.Build());
}
catch (Exception ex)
{
_diagnosticService.Emit(
new HttpEventBuilder(this, HttpEventType.HttpServerError)
{
Detail = "Unexpected error closing HTTP listener",
Uri = _baseUri,
Exception = ex
}.Build());
_httpListener.Abort();
}
_bus.Dispose();
TransportService.Dispose();
if (_messageQueueingService is IDisposable disposableMessageQueueingService)
{
disposableMessageQueueingService.Dispose();
}
if (_messageJournal is IDisposable disposableMessageJournal)
{
disposableMessageJournal.Dispose();
}
if (_subscriptionTrackingService is IDisposable disposableSubscriptionTrackingService)
{
disposableSubscriptionTrackingService.Dispose();
}
_metricsCollector.Dispose();
}
public void Init()
{
var cancellationToken = _cancellationTokenSource.Token;
_channel = CreateChannel(cancellationToken);
var consumer = new EventingBasicConsumer(_channel);
consumer.Received += (sender, args) =>
{
try
{
_consume(_channel, args, cancellationToken);
}
catch (Exception ex)
{
_diagnosticService.Emit(new RabbitMQEventBuilder(this, DiagnosticEventType.MessageNotAcknowledged)
{
Detail = "Unhandled exception in consumer callback",
Exception = ex,
ChannelNumber = _channel.ChannelNumber,
ConsumerTag = _consumerTag,
DeliveryTag = args.DeliveryTag,
}.Build());
_channel.BasicNack(args.DeliveryTag, true, false);
}
};
_channel.BasicConsume(_queueName, _autoAcknowledge, _consumerTag, consumer);
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQConsumerAdded)
{
ChannelNumber = _channel.ChannelNumber,
ConsumerTag = _consumerTag
}.Build());
}
/// <summary>
/// Handles an exception by recording exception details in the log and updating
/// the HTTP response with the appropriate status code
/// </summary>
/// <param name="ex">The exception to handle</param>
/// <returns>Returns <c>true</c> if the exception was successfully handled;
/// <c>false</c> otherwise</returns>
/// <remarks>
/// This method always returns <c>true</c>. The return value is provided in order to
/// match the signature of the <see cref="AggregateException.Handle"/> method.
/// </remarks>
public bool HandleException(Exception ex)
{
if (ex is AggregateException aggregateException)
{
aggregateException.Handle(HandleException);
return(true);
}
if (ex is UnauthorizedAccessException unauthorizedAccessException)
{
_response.StatusCode = 401;
_diagnosticService.Emit(new HttpEventBuilder(_source, DiagnosticEventType.AccessDenied)
{
Detail = "Unauthorized",
Uri = _request.Url,
Method = _request.HttpMethod,
Status = 401,
Exception = unauthorizedAccessException
}.Build());
return(true);
}
if (ex is MessageNotAcknowledgedException notAcknowledgedException)
{
// HTTP 422: Unprocessable Entity
_response.StatusCode = 422;
_diagnosticService.Emit(new HttpEventBuilder(_source, DiagnosticEventType.MessageNotAcknowledged)
{
Detail = "Message not acknowledged",
Uri = _request.Url,
Method = _request.HttpMethod,
Status = 422,
Exception = notAcknowledgedException
}.Build());
return(true);
}
// HTTP 500: Unknown error
_response.StatusCode = 500;
_diagnosticService.Emit(new HttpEventBuilder(_source, DiagnosticEventType.UnhandledException)
{
Detail = "Unexpected error",
Uri = _request.Url,
Method = _request.HttpMethod,
Status = 500,
Exception = ex
}.Build());
return(true);
}
private async Task HandleReceiveResult(UdpReceiveResult result)
{
try
{
var datagram = SubscriptionTrackingDatagram.Decode(result.Buffer);
if (datagram.NodeId == _nodeId)
{
return;
}
switch (datagram.Action)
{
case SubscriptionTrackingDatagram.ActionType.Add:
await _inner.AddSubscription(datagram.Topic, datagram.SubscriberUri, datagram.TTL);
return;
case SubscriptionTrackingDatagram.ActionType.Remove:
await _inner.RemoveSubscription(datagram.Topic, datagram.SubscriberUri);
return;
default:
await _diagnosticService.EmitAsync(new MulticastEventBuilder(this, MulticastEventType.MalformedDatagram)
{
Detail = "Unknown or unsupported subscription tracking action: " + datagram.Action,
Node = _nodeId.ToString(),
Host = result.RemoteEndPoint.Address.ToString(),
Port = result.RemoteEndPoint.Port
}.Build());
break;
}
}
catch (Exception e)
{
_diagnosticService.Emit(new MulticastEventBuilder(this, MulticastEventType.MalformedDatagram)
{
Detail = "Error unmarshaling datagram",
Node = _nodeId.ToString(),
Host = result.RemoteEndPoint.Address.ToString(),
Port = result.RemoteEndPoint.Port,
Exception = e
}.Build());
}
}
/// <inheritdoc />
public Task AddSubscription(TopicName topic, Uri subscriber, TimeSpan ttl = new TimeSpan(),
CancellationToken cancellationToken = new CancellationToken())
{
if (topic == null)
{
throw new ArgumentNullException(nameof(topic));
}
if (subscriber == null)
{
throw new ArgumentNullException(nameof(subscriber));
}
try
{
var expires = ttl <= TimeSpan.Zero
? DateTime.MaxValue
: DateTime.UtcNow.Add(ttl);
var fb = Builders <SubscriptionDocument> .Filter;
var filter = fb.Eq(s => s.Topic, topic.ToString()) &
fb.Eq(s => s.Subscriber, subscriber.ToString());
var update = Builders <SubscriptionDocument> .Update
.Set(s => s.Expires, expires);
return(_subscriptions.UpdateOneAsync(filter, update, new UpdateOptions {
IsUpsert = true
}, cancellationToken));
}
catch (Exception ex)
{
_diagnosticService.Emit(new MongoDBEventBuilder(this, MongoDBEventType.MongoDBUpdateFailed)
{
Detail = $"Error uperting subscription to topic {topic} for subscriber {subscriber}",
CollectionName = _subscriptions.CollectionNamespace.CollectionName,
DatabaseName = _subscriptions.Database.DatabaseNamespace.DatabaseName,
Exception = ex,
Topic = topic
}.Build());
throw;
}
}
/// <summary>
/// Reads previously queued messages from the database and initiates message processing
/// </summary>
/// <param name="cancellationToken">A cancellation token that can be used by the caller
/// to cancel initialization</param>
/// <returns>Returns a task that completes when initialization is complete</returns>
public virtual async Task Init(CancellationToken cancellationToken = default(CancellationToken))
{
if (Interlocked.Exchange(ref _initialized, 1) == 0)
{
try
{
await EnqueueExistingMessages(cancellationToken);
}
catch (Exception ex)
{
DiagnosticService.Emit(
new DiagnosticEventBuilder(this, DiagnosticEventType.ComponentInitializationError)
{
Detail = "Error enqueueing previously queued message(s)",
Exception = ex
}.Build());
}
}
}
/// <summary>
/// Initializes <see cref="IMessageJournalingCommandBuilders"/>
/// </summary>
/// <returns>Returns initialized <see cref="IMessageJournalingCommandBuilders"/></returns>
public IMessageJournalingCommandBuilders InitMessageJournalingCommandBuilders()
{
var providerName = _connectionStringSettings.ProviderName;
IMessageJournalingCommandBuildersProvider provider;
if (string.IsNullOrWhiteSpace(providerName))
{
_diagnosticService.Emit(new SQLEventBuilder(this, DiagnosticEventType.ConfigurationDefault)
{
Detail = "No provider name specified; using default provider (MSSQL)",
ConnectionName = _connectionStringSettings.Name,
}.Build());
provider = new MSSQLCommandBuildersProvider();
}
else
{
provider = _providerService.GetProvider <IMessageJournalingCommandBuildersProvider>(providerName);
}
return(provider.GetMessageJournalingCommandBuilders(_connectionStringSettings));
}
/// <inheritdoc />
public Task <IPrincipal> Validate(string securityToken)
{
if (string.IsNullOrWhiteSpace(securityToken))
{
throw new ArgumentNullException(nameof(securityToken));
}
var tokenHandler = new JwtSecurityTokenHandler();
var signingKeys = new List <SecurityKey>();
if (_signingKey != null)
{
signingKeys.Add(_signingKey);
}
if (_fallbackSigningKey != null)
{
signingKeys.Add(_fallbackSigningKey);
}
var parameters = new TokenValidationParameters
{
ValidateIssuer = false,
ValidateAudience = false
};
if (signingKeys.Any())
{
parameters.IssuerSigningKeys = signingKeys;
parameters.RequireSignedTokens = true;
}
else
{
parameters.RequireSignedTokens = false;
}
IPrincipal principal;
try
{
principal = tokenHandler.ValidateToken(securityToken, parameters, out SecurityToken _);
}
catch (Exception ex)
{
principal = null;
_diagnosticService.Emit(new DiagnosticEventBuilder(this, DiagnosticEventType.InvalidSecurityToken)
{
Exception = ex
}.Build());
}
return(Task.FromResult(principal));
}
/// <inheritdoc />
public virtual DbConnection GetConnection()
{
var connection = ProviderFactory.CreateConnection();
// The abstract DbProviderFactory class specifies a virtual CreateConnection method
// whose default implementation returns null. There is a possibility that this method
// will not be overridden by the concrete provider factory. If that is the case, then
// there is nothing we can do other than avoid a NullReferenceException by not attempting
// to set the connection string or open the connection.
if (connection != null)
{
connection.ConnectionString = ConnectionStringSettings.ConnectionString;
connection.Open();
_diagnosticService.Emit(new SQLEventBuilder(this, SQLEventType.SQLConnectionOpened)
{
ConnectionName = ConnectionStringSettings.Name
}.Build());
}
return(connection);
}
public void CloseManagedConnection(bool disposing)
{
if (_closed)
{
return;
}
_closed = true;
if (disposing)
{
lock (_syncRoot)
{
_connection.Close();
}
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQConnectionClosed)
{
Detail = "Managed connection ID " + ManagedConnectionId + " successfully closed"
}.Build());
}
GC.SuppressFinalize(this);
}
private void StopListening()
{
try
{
if (!_cancellationTokenSource.IsCancellationRequested)
{
_cancellationTokenSource.Cancel();
}
if (_listenTask != null)
{
_listenTask.Wait(TimeSpan.FromSeconds(30));
}
if (_httpListener.IsListening)
{
_httpListener.Stop();
}
_diagnosticService.Emit(
new HttpEventBuilder(this, HttpEventType.HttpServerStopped)
{
Uri = _baseUri
}.Build());
}
catch (Exception ex)
{
_diagnosticService.Emit(
new HttpEventBuilder(this, HttpEventType.HttpServerError)
{
Detail = "Unexpected error closing HTTP listener",
Uri = _baseUri,
Exception = ex
}.Build());
_httpListener.Abort();
}
}
private MessageName GetSchemaTypeName(Type type)
{
try
{
return(_dataContractExporter.GetSchemaTypeName(type).ToString());
}
catch (Exception ex)
{
_diagnosticService.Emit(new DiagnosticEventBuilder(this, DiagnosticEventType.InvalidDataContract)
{
Detail = $"Error determining schema type name for {type}",
Exception = ex
}.Build());
// Applly the default namespace convention
return($"http://schemas.datacontract.org/2004/07/{type.Namespace}:{type.Name}");
}
}
public async Task HandleMessage(object content, IMessageContext messageContext, CancellationToken cancellationToken)
{
try
{
var handler = _handlerFactory();
if (handler == null && !_method.IsStatic)
{
throw new NullReferenceException("Handler factory returned null handler instance");
}
await(Task) _method.Invoke(handler, new[] { content, messageContext, cancellationToken });
}
catch (Exception e)
{
_diagnosticService.Emit(new DiagnosticEventBuilder(null, DiagnosticEventType.HandlerActivationError)
{
Detail = $"Error activating instance of message handler {_handlerType}: {e.Message}",
Exception = e
}.Build());
throw;
}
}
/// <summary>
/// Initializes a new <see cref="RabbitMQTransportService"/>
/// </summary>
/// <param name="options">The options that govern the configuration and behavior of the
/// RabbitMQ transport</param>
public RabbitMQTransportService(RabbitMQTransportServiceOptions options)
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
_baseUri = options.BaseUri;
_connectionManager = options.ConnectionManager;
_diagnosticService = options.DiagnosticService ?? DiagnosticService.DefaultInstance;
_messageJournal = options.MessageJournal;
_securityTokenService = options.SecurityTokenService ?? new JwtSecurityTokenService();
_encoding = options.Encoding ?? Encoding.GetEncoding(RabbitMQDefaults.Encoding);
_defaultQueueOptions = options.DefaultQueueOptions ?? new QueueOptions();
var connection = _connectionManager.GetConnection(_baseUri);
var topics = (options.Topics ?? Enumerable.Empty <TopicName>()).Where(t => t != null);
using (var channel = connection.CreateModel())
{
foreach (var topicName in topics)
{
var exchangeName = topicName.GetTopicExchangeName();
channel.ExchangeDeclare(exchangeName, "fanout", _defaultQueueOptions.IsDurable, false, new Dictionary <string, object>());
_diagnosticService.Emit(
new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQExchangeDeclared)
{
Detail = "Fanout exchange declared for topic",
Exchange = exchangeName,
Topic = topicName,
ChannelNumber = channel.ChannelNumber
}.Build());
}
}
_inboundQueue = new RabbitMQQueue(connection, InboxQueueName, this,
_encoding, _defaultQueueOptions, _diagnosticService, _securityTokenService, null);
_inboundQueue.Init();
}
private Task SendMessage(Message message, IEndpointCredentials credentials,
CancellationToken cancellationToken)
{
try
{
return(_transportService.SendMessage(message, credentials, cancellationToken));
}
catch (Exception ex)
{
_diagnosticService.Emit(new DiagnosticEventBuilder(this, DiagnosticEventType.MessageSendFailed)
{
Message = message,
Exception = ex
}.Build());
throw;
}
}
/// <summary>
/// Called by the bus to indicate that a message has been received that is
/// related to another message (possibly a reply)
/// </summary>
/// <param name="message"></param>
/// <returns>Returns a task that will complete when all reply stream
/// observers have been notified that a reply was received</returns>
public Task NotifyReplyReceived(Message message)
{
CheckDisposed();
var relatedTo = message.Headers.RelatedTo;
return(Task.Run(() =>
{
if (_cache.Get(relatedTo) is ReplyStream replyStream)
{
var messageContent = _messageMarshaller.Unmarshal(message);
replyStream.NotifyReplyReceived(messageContent);
}
else
{
_diagnosticService.Emit(
new DiagnosticEventBuilder(this, DiagnosticEventType.CorrelationFailed)
{
Message = message,
Detail = $"No sent message found with ID {relatedTo}"
}.Build());
}
}));
}
public ManagedConnection(Uri uri, IDiagnosticService diagnosticService)
{
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
// Trailing slashes causes errors when connecting to RabbitMQ
uri = uri.WithoutTrailingSlash();
var managedConnectionIdBuilder = new UriBuilder(uri)
{
// Sanitize credentials in managed connection ID. This value
// is output in log messages for diagnostics, so we don't want
// or need the credentials displayed.
UserName = "",
Password = ""
};
ManagedConnectionId = managedConnectionIdBuilder.Uri.ToString();
IConnectionFactory connectionFactory = new ConnectionFactory
{
Uri = uri,
AutomaticRecoveryEnabled = true,
RequestedHeartbeat = 10,
NetworkRecoveryInterval = TimeSpan.FromSeconds(10)
};
_diagnosticService = diagnosticService ?? throw new ArgumentNullException(nameof(diagnosticService));
_connection = connectionFactory.CreateConnection();
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQConnectionOpened)
{
Detail = "Opened managed connection ID " + ManagedConnectionId
}.Build());
}
/// <summary>
/// Performs final initialization of the transport service
/// </summary>
/// <param name="cancellationToken">A cancellation token that can be used by the caller
/// can use to cancel the initialization process</param>
/// <returns>Returns a task that completes when initialization is complete</returns>
public async Task Init(CancellationToken cancellationToken = default(CancellationToken))
{
if (Interlocked.Exchange(ref _initialized, 1) == 0)
{
try
{
await _messageQueueingService.CreateQueue(_outboundQueueName, this,
cancellationToken : cancellationToken);
await _diagnosticService.EmitAsync(
new DiagnosticEventBuilder(this, DiagnosticEventType.ComponentInitialization)
{
Detail = "HTTP transport service initialized"
}.Build(), cancellationToken);
}
catch (Exception ex)
{
_diagnosticService.Emit(
new DiagnosticEventBuilder(this, DiagnosticEventType.ComponentInitializationError)
{
Detail = "Error initializating outbound transport queue",
Exception = ex
}.Build());
throw;
}
}
}
public async Task <Message> Decrypt(Message encryptedMessage)
{
var encryptedHeaders = new EncryptedMessageHeaders(encryptedMessage.Headers);
var iv = Convert.FromBase64String(encryptedHeaders.IV);
var headerCiphertext = Convert.FromBase64String(encryptedHeaders.Headers);
var contentCiphertext = Convert.FromBase64String(encryptedMessage.Content);
var signature = DecodeSignature(encryptedMessage, encryptedHeaders);
var keyNumber = 0;
var keyCount = _decryptionKeys.Count;
var innerExceptions = new List <Exception>();
foreach (var key in _decryptionKeys)
{
keyNumber++;
byte[] headerCleartext;
byte[] contentCleartext;
try
{
headerCleartext = await Decrypt(headerCiphertext, key, iv);
}
catch (Exception ex)
{
innerExceptions.Add(ex);
_diagnosticService.Emit(new DiagnosticEventBuilder(this, DiagnosticEventType.DecryptionError)
{
Detail = $"Error decrypting message headers using key {keyNumber} of {keyCount}",
Message = encryptedMessage,
Exception = ex
}.Build());
continue;
}
var signatureVerified = false;
try
{
signatureVerified = Verify(key, headerCleartext, signature);
if (!signatureVerified)
{
_diagnosticService.Emit(new DiagnosticEventBuilder(this, DiagnosticEventType.SignatureVerificationFailure)
{
Detail = $"Signature verification failed using key {keyNumber} of {keyCount}",
Message = encryptedMessage
}.Build());
}
}
catch (Exception ex)
{
innerExceptions.Add(ex);
_diagnosticService.Emit(new DiagnosticEventBuilder(this, DiagnosticEventType.SignatureVerificationFailure)
{
Detail = $"Unexpected error verifying message signature using key {keyNumber} of {keyCount}",
Message = encryptedMessage,
Exception = ex
}.Build());
}
if (!signatureVerified)
{
continue;
}
try
{
contentCleartext = await Decrypt(contentCiphertext, key, iv);
}
catch (Exception ex)
{
innerExceptions.Add(ex);
_diagnosticService.Emit(new DiagnosticEventBuilder(this, DiagnosticEventType.DecryptionError)
{
Detail = $"Error decrypting message content using key {keyNumber} of {keyCount}",
Message = encryptedMessage,
Exception = ex
}.Build());
continue;
}
var headers = await UnmarshalHeaders(headerCleartext);
var content = await UnmarshalContent(contentCleartext);
return(new Message(headers, content));
}
throw new MessageEncryptionException($"Unable to decrypt and verify message using any of {keyCount} available decryption key(s)", innerExceptions);
}
/// <summary>
/// Initializes RabbitMQ queues and exchanges
/// </summary>
public void Init()
{
using (var channel = _connection.CreateModel())
{
var queueArgs = new Dictionary <string, object>
{
{ "x-dead-letter-exchange", _deadLetterExchange },
};
if (_ttl > TimeSpan.Zero)
{
queueArgs["x-expires"] = _ttl;
}
channel.ExchangeDeclare(_queueExchange, "direct", _isDurable, false, null);
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQExchangeDeclared)
{
Detail = "Primary exchange declared for queue",
Exchange = _queueExchange,
Queue = _queueName
}.Build());
channel.ExchangeDeclare(_deadLetterExchange, "direct", _isDurable, false, null);
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQExchangeDeclared)
{
Detail = "Dead letter exchange declared for queue",
Exchange = _deadLetterExchange,
Queue = _queueName
}.Build());
channel.QueueDeclare(_queueName, _isDurable, false, false, queueArgs);
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQQueueDeclared)
{
Detail = "Queue declared",
Queue = _queueName
}.Build());
channel.QueueBind(_queueName, _queueExchange, "", null);
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQQueueBound)
{
Detail = "Queue bound to primary exchange",
Exchange = _queueExchange,
Queue = _queueName
}.Build());
var retryTtlMs = (int)_retryDelay.TotalMilliseconds;
var retryQueueArgs = new Dictionary <string, object>
{
{ "x-dead-letter-exchange", _queueExchange },
{ "x-message-ttl", retryTtlMs }
};
channel.ExchangeDeclare(_retryExchange, "direct", _isDurable, false, null);
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQExchangeDeclared)
{
Detail = "Retry exchange declared for queue",
Exchange = _retryExchange,
Queue = _queueName
}.Build());
channel.QueueDeclare(_retryQueueName, _isDurable, false, false, retryQueueArgs);
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQQueueDeclared)
{
Detail = "Retry queue declared",
Queue = _retryQueueName
}.Build());
channel.QueueBind(_retryQueueName, _retryExchange, "", null);
_diagnosticService.Emit(new RabbitMQEventBuilder(this, RabbitMQEventType.RabbitMQQueueDeclared)
{
Detail = "Retry queue bound to retry exchange",
Exchange = _retryExchange,
Queue = _retryQueueName
}.Build());
}
_consumer.Init();
_diagnosticService.Emit(new RabbitMQEventBuilder(this, DiagnosticEventType.ComponentInitialization)
{
Detail = "RabbitMQ queue initialized",
Queue = _queueName
}.Build());
}