public void ValidateBridgeConfig_ValidInput() { var validator = new BrokerPropertiesValidator(); EdgeHubDesiredProperties properties = ConfigTestData.GetTestData(); IList <string> errors = validator.ValidateBridgeConfig(properties.BrokerConfiguration.Bridges); Assert.Equal(0, errors.Count); }
public void ValidateAuthorizationConfig_ValidInput() { var validator = new BrokerPropertiesValidator(); EdgeHubDesiredProperties_1_2 properties = ConfigTestData.GetTestData(); var authzProperties = properties.BrokerConfiguration.Authorizations; IList <string> errors = validator.ValidateAuthorizationConfig(authzProperties); Assert.Equal(0, errors.Count); }
public void ValidateAuthorizationConfig_EmptyResourceAllowedForConnectOperation() { var validator = new BrokerPropertiesValidator(); EdgeHubDesiredProperties properties = ConfigTestData.GetTestData(); var authzProperties = properties.BrokerConfiguration.Authorizations; // arrange connect op with no resources. authzProperties[0].Deny[0].Operations.Clear(); authzProperties[0].Deny[0].Operations.Insert(0, "mqtt:connect"); authzProperties[0].Deny[0].Resources.Clear(); IList <string> errors = validator.ValidateAuthorizationConfig(authzProperties); Assert.Equal(0, errors.Count); }
public void ValidateAuthorizationConfig_InvalidTopicFilters() { var validator = new BrokerPropertiesValidator(); EdgeHubDesiredProperties properties = ConfigTestData.GetTestData(); var authzProperties = properties.BrokerConfiguration.Authorizations; // arrange some errors authzProperties[0].Deny[0].Resources[0] = "topic/#/"; authzProperties[1].Allow[0].Resources[0] = "topic+"; IList <string> errors = validator.ValidateAuthorizationConfig(authzProperties); Assert.Equal(2, errors.Count); Assert.Equal("Statement 0: Deny: Resource (topic filter) is invalid: topic/#/", errors[0]); Assert.Equal("Statement 1: Allow: Resource (topic filter) is invalid: topic+", errors[1]); }
public void ValidateAuthorizationConfig_InvalidVariableNames() { var validator = new BrokerPropertiesValidator(); EdgeHubDesiredProperties properties = ConfigTestData.GetTestData(); var authzProperties = properties.BrokerConfiguration.Authorizations; // arrange some errors authzProperties[0].Identities[0] = "{{anywhat}}"; authzProperties[1].Allow[0].Resources[0] = "topic/{{invalid}}/{{myothervar}}"; IList <string> errors = validator.ValidateAuthorizationConfig(authzProperties); Assert.Equal(3, errors.Count); Assert.Equal("Statement 0: Invalid variable name: {{anywhat}}", errors[0]); Assert.Equal("Statement 1: Invalid variable name: {{invalid}}", errors[1]); Assert.Equal("Statement 1: Invalid variable name: {{myothervar}}", errors[2]); }
public void ValidateAuthorizationConfig_InvalidOperation() { var validator = new BrokerPropertiesValidator(); EdgeHubDesiredProperties properties = ConfigTestData.GetTestData(); var authzProperties = properties.BrokerConfiguration.Authorizations; // arrange some errors authzProperties[0].Deny[0].Operations[0] = "invalid"; IList <string> errors = validator.ValidateAuthorizationConfig(authzProperties); Assert.Equal(1, errors.Count); Assert.Equal( "Statement 0: Deny: Unknown mqtt operation: invalid. " + "List of supported operations: mqtt:publish, mqtt:subscribe, mqtt:connect", errors[0]); }
public void ValidateBridgeConfig_InvalidTopicOrPrefix() { var validator = new BrokerPropertiesValidator(); var bridgeConfig = new BridgeConfig { new Bridge("$upstream", new List <Settings> { new Settings(Direction.In, "topic/#/a", "local/#", "remote/+/") }) }; IList <string> errors = validator.ValidateBridgeConfig(bridgeConfig); Assert.Equal(3, errors.Count); Assert.Equal("Bridge 0: Topic is invalid: topic/#/a", errors[0]); Assert.Equal("Bridge 0: InPrefix must not contain wildcards (+, #)", errors[1]); Assert.Equal("Bridge 0: OutPrefix must not contain wildcards (+, #)", errors[2]); }
public void ValidateAuthorizationConfig_EmptyElements() { var validator = new BrokerPropertiesValidator(); EdgeHubDesiredProperties properties = ConfigTestData.GetTestData(); var authzProperties = properties.BrokerConfiguration.Authorizations; // arrange some errors authzProperties[0].Identities[0] = string.Empty; authzProperties[1].Allow[0].Operations.RemoveAt(0); authzProperties[1].Allow[0].Operations.RemoveAt(0); IList <string> errors = validator.ValidateAuthorizationConfig(properties.BrokerConfiguration.Authorizations); Assert.Equal(2, errors.Count); Assert.Equal("Statement 0: Identity name is invalid: ", errors[0]); Assert.Equal("Statement 1: Allow: Operations list must not be empty", errors[1]); }
public void ValidateBridgeConfig_EmptyElements() { var validator = new BrokerPropertiesValidator(); var bridgeConfig = new BridgeConfig { new Bridge(string.Empty, new List <Settings> { new Settings(Direction.In, string.Empty, string.Empty, string.Empty) }), new Bridge("floor2", new List <Settings> { }) }; IList <string> errors = validator.ValidateBridgeConfig(bridgeConfig); Assert.Equal(2, errors.Count); Assert.Equal("Bridge 0: Endpoint must not be empty", errors[0]); Assert.Equal("Bridge 1: Settings must not be empty", errors[1]); }
protected override void Load(ContainerBuilder builder) { // IMessageConverter<IRoutingMessage> builder.Register(c => new RoutingMessageConverter()) .As <Core.IMessageConverter <IRoutingMessage> >() .SingleInstance(); // IRoutingPerfCounter builder.Register( c => { Routing.PerfCounter = NullRoutingPerfCounter.Instance; return(Routing.PerfCounter); }) .As <IRoutingPerfCounter>() .AutoActivate() .SingleInstance(); // IRoutingUserAnalyticsLogger builder.Register( c => { Routing.UserAnalyticsLogger = NullUserAnalyticsLogger.Instance; return(Routing.UserAnalyticsLogger); }) .As <IRoutingUserAnalyticsLogger>() .AutoActivate() .SingleInstance(); // IRoutingUserMetricLogger builder.Register( c => { Routing.UserMetricLogger = EdgeHubRoutingUserMetricLogger.Instance; return(Routing.UserMetricLogger); }) .As <IRoutingUserMetricLogger>() .AutoActivate() .SingleInstance(); // IMessageConverter<Message> builder.Register(c => new DeviceClientMessageConverter()) .As <Core.IMessageConverter <Message> >() .SingleInstance(); // IMessageConverter<Twin> builder.Register(c => new TwinMessageConverter()) .As <Core.IMessageConverter <Twin> >() .SingleInstance(); // IMessageConverter<TwinCollection> builder.Register(c => new TwinCollectionMessageConverter()) .As <Core.IMessageConverter <TwinCollection> >() .SingleInstance(); // IMessageConverterProvider builder.Register( c => new MessageConverterProvider( new Dictionary <Type, IMessageConverter>() { { typeof(Message), c.Resolve <Core.IMessageConverter <Message> >() }, { typeof(Twin), c.Resolve <Core.IMessageConverter <Twin> >() }, { typeof(TwinCollection), c.Resolve <Core.IMessageConverter <TwinCollection> >() } })) .As <IMessageConverterProvider>() .SingleInstance(); // IDeviceConnectivityManager builder.Register( c => { var edgeHubCredentials = c.ResolveNamed <IClientCredentials>("EdgeHubCredentials"); IDeviceConnectivityManager deviceConnectivityManager = this.experimentalFeatures.DisableConnectivityCheck ? new NullDeviceConnectivityManager() : new DeviceConnectivityManager(this.connectivityCheckFrequency, TimeSpan.FromMinutes(2), edgeHubCredentials.Identity) as IDeviceConnectivityManager; return(deviceConnectivityManager); }) .As <IDeviceConnectivityManager>() .SingleInstance(); // IDeviceClientProvider builder.Register( c => { IClientProvider underlyingClientProvider = new ClientProvider(this.gatewayHostname); IClientProvider connectivityAwareClientProvider = new ConnectivityAwareClientProvider(underlyingClientProvider, c.Resolve <IDeviceConnectivityManager>()); return(connectivityAwareClientProvider); }) .As <IClientProvider>() .SingleInstance(); if (this.isLegacyUpstream) { // Task<ICloudConnectionProvider> builder.Register( async c => { var metadataStore = await c.Resolve <Task <IMetadataStore> >(); var messageConverterProvider = c.Resolve <IMessageConverterProvider>(); var clientProvider = c.Resolve <IClientProvider>(); var tokenProvider = c.ResolveNamed <ITokenProvider>("EdgeHubClientAuthTokenProvider"); var credentialsCacheTask = c.Resolve <Task <ICredentialsCache> >(); var edgeHubCredentials = c.ResolveNamed <IClientCredentials>("EdgeHubCredentials"); var deviceScopeIdentitiesCacheTask = c.Resolve <Task <IDeviceScopeIdentitiesCache> >(); var proxy = c.Resolve <Option <IWebProxy> >(); IDeviceScopeIdentitiesCache deviceScopeIdentitiesCache = await deviceScopeIdentitiesCacheTask; ICredentialsCache credentialsCache = await credentialsCacheTask; ICloudConnectionProvider cloudConnectionProvider = new CloudConnectionProvider( messageConverterProvider, this.connectionPoolSize, clientProvider, this.upstreamProtocol, tokenProvider, deviceScopeIdentitiesCache, credentialsCache, edgeHubCredentials.Identity, this.cloudConnectionIdleTimeout, this.closeCloudConnectionOnIdleTimeout, this.operationTimeout, this.useServerHeartbeat, proxy, metadataStore, this.nestedEdgeEnabled); return(cloudConnectionProvider); }) .As <Task <ICloudConnectionProvider> >() .SingleInstance(); } else { builder.Register( c => { return(Task.FromResult(new BrokeredCloudConnectionProvider(c.Resolve <BrokeredCloudProxyDispatcher>()) as ICloudConnectionProvider)); }) .As <Task <ICloudConnectionProvider> >() .SingleInstance(); } // IIdentityProvider builder.Register(_ => new IdentityProvider(this.iotHubName)) .As <IIdentityProvider>() .SingleInstance(); // Task<IConnectionManager> builder.Register( async c => { var cloudConnectionProviderTask = c.Resolve <Task <ICloudConnectionProvider> >(); var credentialsCacheTask = c.Resolve <Task <ICredentialsCache> >(); var identityProvider = c.Resolve <IIdentityProvider>(); var deviceConnectivityManager = c.Resolve <IDeviceConnectivityManager>(); ICloudConnectionProvider cloudConnectionProvider = await cloudConnectionProviderTask; ICredentialsCache credentialsCache = await credentialsCacheTask; IConnectionManager connectionManager = new ConnectionManager( cloudConnectionProvider, credentialsCache, identityProvider, deviceConnectivityManager, this.maxConnectedClients, this.closeCloudConnectionOnDeviceDisconnect); return(connectionManager); }) .As <Task <IConnectionManager> >() .SingleInstance(); // Task<IEndpointFactory> builder.Register( async c => { var messageConverter = c.Resolve <Core.IMessageConverter <IRoutingMessage> >(); IConnectionManager connectionManager = await c.Resolve <Task <IConnectionManager> >(); return(new EndpointFactory(connectionManager, messageConverter, this.edgeDeviceId, this.maxUpstreamBatchSize, this.upstreamFanOutFactor) as IEndpointFactory); }) .As <Task <IEndpointFactory> >() .SingleInstance(); // Task<RouteFactory> builder.Register(async c => new EdgeRouteFactory(await c.Resolve <Task <IEndpointFactory> >()) as RouteFactory) .As <Task <RouteFactory> >() .SingleInstance(); // RouterConfig builder.Register(c => new RouterConfig(Enumerable.Empty <Route>())) .As <RouterConfig>() .SingleInstance(); if (!this.isStoreAndForwardEnabled) { // EndpointExecutorConfig builder.Register( c => { RetryStrategy defaultRetryStrategy = new FixedInterval(0, TimeSpan.FromSeconds(1)); TimeSpan defaultRevivePeriod = TimeSpan.FromHours(1); TimeSpan defaultTimeout = TimeSpan.FromSeconds(60); return(new EndpointExecutorConfig(defaultTimeout, defaultRetryStrategy, defaultRevivePeriod, true)); }) .As <EndpointExecutorConfig>() .SingleInstance(); // IEndpointExecutorFactory builder.Register(c => new SyncEndpointExecutorFactory(c.Resolve <EndpointExecutorConfig>())) .As <IEndpointExecutorFactory>() .SingleInstance(); // Task<Router> builder.Register( async c => { var endpointExecutorFactory = c.Resolve <IEndpointExecutorFactory>(); var routerConfig = c.Resolve <RouterConfig>(); Router router = await Router.CreateAsync(Guid.NewGuid().ToString(), this.iotHubName, routerConfig, endpointExecutorFactory); return(router); }) .As <Task <Router> >() .SingleInstance(); // Task<ITwinManager> builder.Register( async c => { if (!this.useV1TwinManager) { var messageConverterProvider = c.Resolve <IMessageConverterProvider>(); IConnectionManager connectionManager = await c.Resolve <Task <IConnectionManager> >(); ITwinManager twinManager = new PassThroughTwinManager(connectionManager, messageConverterProvider); return(twinManager); } else { var messageConverterProvider = c.Resolve <IMessageConverterProvider>(); IConnectionManager connectionManager = await c.Resolve <Task <IConnectionManager> >(); return(TwinManager.CreateTwinManager(connectionManager, messageConverterProvider, Option.None <IStoreProvider>())); } }) .As <Task <ITwinManager> >() .SingleInstance(); } else { // EndpointExecutorConfig builder.Register( c => { // Endpoint executor config values - // ExponentialBackoff - minBackoff = 1s, maxBackoff = 60s, delta (used to add randomness to backoff) - 1s (default) // Num of retries = int.MaxValue(we want to keep retrying till the message is sent) // Revive period - period for which the endpoint should be considered dead if it doesn't respond - 1 min (we want to try continuously till the message expires) // Timeout - time for which we want for the ack from the endpoint = 30s // TODO - Should the number of retries be tied to the Store and Forward ttl? Not // doing that right now as that value can be changed at runtime, but these settings // cannot. Need to make the number of retries dynamically configurable for that. TimeSpan minWait = TimeSpan.FromSeconds(1); TimeSpan maxWait = TimeSpan.FromSeconds(60); TimeSpan delta = TimeSpan.FromSeconds(1); int retries = int.MaxValue; RetryStrategy retryStrategy = new ExponentialBackoff(retries, minWait, maxWait, delta); TimeSpan timeout = TimeSpan.FromSeconds(30); TimeSpan revivePeriod = TimeSpan.FromSeconds(30); return(new EndpointExecutorConfig(timeout, retryStrategy, revivePeriod)); }) .As <EndpointExecutorConfig>() .SingleInstance(); // Task<ICheckpointStore> builder.Register( async c => { var dbStoreProvider = await c.Resolve <Task <IDbStoreProvider> >(); IStoreProvider storeProvider = new StoreProvider(dbStoreProvider); ICheckpointStore checkpointStore = CheckpointStore.Create(storeProvider); return(checkpointStore); }) .As <Task <ICheckpointStore> >() .SingleInstance(); // Task<IMessageStore> builder.Register( async c => { var checkpointStore = await c.Resolve <Task <ICheckpointStore> >(); var dbStoreProvider = await c.Resolve <Task <IDbStoreProvider> >(); IStoreProvider storeProvider = new StoreProvider(dbStoreProvider); IMessageStore messageStore = new MessageStore(storeProvider, checkpointStore, this.storeAndForwardConfiguration.TimeToLive, this.checkEntireQueueOnCleanup); return(messageStore); }) .As <Task <IMessageStore> >() .SingleInstance(); // Task<IEndpointExecutorFactory> builder.Register( async c => { var endpointExecutorConfig = c.Resolve <EndpointExecutorConfig>(); var messageStore = await c.Resolve <Task <IMessageStore> >(); IEndpointExecutorFactory endpointExecutorFactory = new StoringAsyncEndpointExecutorFactory(endpointExecutorConfig, new AsyncEndpointExecutorOptions(10, TimeSpan.FromSeconds(10)), messageStore); return(endpointExecutorFactory); }) .As <Task <IEndpointExecutorFactory> >() .SingleInstance(); // Task<Router> builder.Register( async c => { var checkpointStore = await c.Resolve <Task <ICheckpointStore> >(); var routerConfig = c.Resolve <RouterConfig>(); var endpointExecutorFactory = await c.Resolve <Task <IEndpointExecutorFactory> >(); return(await Router.CreateAsync(Guid.NewGuid().ToString(), this.iotHubName, routerConfig, endpointExecutorFactory, checkpointStore)); }) .As <Task <Router> >() .SingleInstance(); // Task<ITwinManager> builder.Register( async c => { if (this.useV1TwinManager) { var dbStoreProvider = await c.Resolve <Task <IDbStoreProvider> >(); var messageConverterProvider = c.Resolve <IMessageConverterProvider>(); IConnectionManager connectionManager = await c.Resolve <Task <IConnectionManager> >(); return(TwinManager.CreateTwinManager(connectionManager, messageConverterProvider, Option.Some <IStoreProvider>(new StoreProvider(dbStoreProvider)))); } else { var messageConverterProvider = c.Resolve <IMessageConverterProvider>(); var deviceConnectivityManager = c.Resolve <IDeviceConnectivityManager>(); var connectionManagerTask = c.Resolve <Task <IConnectionManager> >(); IEntityStore <string, TwinStoreEntity> entityStore = await this.GetTwinStore(c); IConnectionManager connectionManager = await connectionManagerTask; ITwinManager twinManager = StoringTwinManager.Create( connectionManager, messageConverterProvider, entityStore, deviceConnectivityManager, new ReportedPropertiesValidator(), this.minTwinSyncPeriod, this.reportedPropertiesSyncFrequency); return(twinManager); } }) .As <Task <ITwinManager> >() .SingleInstance(); } // IClientCredentials "EdgeHubCredentials" builder.Register( c => { var identityFactory = c.Resolve <IClientCredentialsFactory>(); IClientCredentials edgeHubCredentials = this.connectionString.Map(cs => identityFactory.GetWithConnectionString(cs)).GetOrElse( () => identityFactory.GetWithIotEdged(this.edgeDeviceId, this.edgeModuleId)); return(edgeHubCredentials); }) .Named <IClientCredentials>("EdgeHubCredentials") .SingleInstance(); // Task<IInvokeMethodHandler> builder.Register( async c => { IConnectionManager connectionManager = await c.Resolve <Task <IConnectionManager> >(); return(new InvokeMethodHandler(connectionManager) as IInvokeMethodHandler); }) .As <Task <IInvokeMethodHandler> >() .SingleInstance(); // Task<ISubscriptionProcessor> builder.Register( async c => { var connectionManagerTask = c.Resolve <Task <IConnectionManager> >(); if (this.experimentalFeatures.DisableCloudSubscriptions) { return(new LocalSubscriptionProcessor(await connectionManagerTask) as ISubscriptionProcessor); } else { var invokeMethodHandlerTask = c.Resolve <Task <IInvokeMethodHandler> >(); var deviceConnectivityManager = c.Resolve <IDeviceConnectivityManager>(); IConnectionManager connectionManager = await connectionManagerTask; IInvokeMethodHandler invokeMethodHandler = await invokeMethodHandlerTask; return(new SubscriptionProcessor(connectionManager, invokeMethodHandler, deviceConnectivityManager) as ISubscriptionProcessor); } }) .As <Task <ISubscriptionProcessor> >() .SingleInstance(); // Task<IEdgeHub> builder.Register( async c => { var routingMessageConverter = c.Resolve <Core.IMessageConverter <IRoutingMessage> >(); var routerTask = c.Resolve <Task <Router> >(); var twinManagerTask = c.Resolve <Task <ITwinManager> >(); var invokeMethodHandlerTask = c.Resolve <Task <IInvokeMethodHandler> >(); var connectionManagerTask = c.Resolve <Task <IConnectionManager> >(); var subscriptionProcessorTask = c.Resolve <Task <ISubscriptionProcessor> >(); var deviceScopeIdentitiesCacheTask = c.Resolve <Task <IDeviceScopeIdentitiesCache> >(); Router router = await routerTask; ITwinManager twinManager = await twinManagerTask; IConnectionManager connectionManager = await connectionManagerTask; IInvokeMethodHandler invokeMethodHandler = await invokeMethodHandlerTask; ISubscriptionProcessor subscriptionProcessor = await subscriptionProcessorTask; IDeviceScopeIdentitiesCache deviceScopeIdentitiesCache = await deviceScopeIdentitiesCacheTask; IEdgeHub hub = new RoutingEdgeHub( router, routingMessageConverter, connectionManager, twinManager, this.edgeDeviceId, this.edgeModuleId, invokeMethodHandler, subscriptionProcessor, deviceScopeIdentitiesCache); return(hub); }) .As <Task <IEdgeHub> >() .SingleInstance(); // BrokerPropertiesValidator builder.Register( c => { return(new BrokerPropertiesValidator()); }) .As <BrokerPropertiesValidator>() .SingleInstance(); // Task<EdgeHubConfigParser> builder.Register( async c => { RouteFactory routeFactory = await c.Resolve <Task <RouteFactory> >(); BrokerPropertiesValidator validator = c.Resolve <BrokerPropertiesValidator>(); var configParser = new EdgeHubConfigParser(routeFactory, validator); return(configParser); }) .As <Task <EdgeHubConfigParser> >() .SingleInstance(); // Task<ConfigUpdater> builder.Register( async c => { IMessageStore messageStore = this.isStoreAndForwardEnabled ? await c.Resolve <Task <IMessageStore> >() : null; var storageSpaceChecker = c.Resolve <IStorageSpaceChecker>(); var edgeHubCredentials = c.ResolveNamed <IClientCredentials>("EdgeHubCredentials"); RouteFactory routeFactory = await c.Resolve <Task <RouteFactory> >(); Router router = await c.Resolve <Task <Router> >(); var twinManagerTask = c.Resolve <Task <ITwinManager> >(); var twinMessageConverter = c.Resolve <Core.IMessageConverter <Twin> >(); var twinManager = await twinManagerTask; var configUpdater = new ConfigUpdater(router, messageStore, this.configUpdateFrequency, storageSpaceChecker); return(configUpdater); }) .As <Task <ConfigUpdater> >() .SingleInstance(); // Task<IConfigSource> builder.Register <Task <IConfigSource> >( async c => { RouteFactory routeFactory = await c.Resolve <Task <RouteFactory> >(); EdgeHubConfigParser configParser = await c.Resolve <Task <EdgeHubConfigParser> >(); if (this.useTwinConfig) { var edgeHubCredentials = c.ResolveNamed <IClientCredentials>("EdgeHubCredentials"); var twinCollectionMessageConverter = c.Resolve <Core.IMessageConverter <TwinCollection> >(); var twinMessageConverter = c.Resolve <Core.IMessageConverter <Twin> >(); var twinManagerTask = c.Resolve <Task <ITwinManager> >(); var edgeHubTask = c.Resolve <Task <IEdgeHub> >(); ITwinManager twinManager = await twinManagerTask; IEdgeHub edgeHub = await edgeHubTask; IConnectionManager connectionManager = await c.Resolve <Task <IConnectionManager> >(); IDeviceScopeIdentitiesCache deviceScopeIdentitiesCache = await c.Resolve <Task <IDeviceScopeIdentitiesCache> >(); var edgeHubConnection = await EdgeHubConnection.Create( edgeHubCredentials.Identity, edgeHub, twinManager, connectionManager, routeFactory, twinCollectionMessageConverter, this.versionInfo, deviceScopeIdentitiesCache); return(new TwinConfigSource( edgeHubConnection, edgeHubCredentials.Identity.Id, this.versionInfo, twinManager, twinMessageConverter, twinCollectionMessageConverter, configParser)); } else { return(new LocalConfigSource( routeFactory, this.routes, this.storeAndForwardConfiguration)); } }) .As <Task <IConfigSource> >() .SingleInstance(); // Task<IConnectionProvider> builder.Register( async c => { var connectionManagerTask = c.Resolve <Task <IConnectionManager> >(); var edgeHubTask = c.Resolve <Task <IEdgeHub> >(); IConnectionManager connectionManager = await connectionManagerTask; IEdgeHub edgeHub = await edgeHubTask; IConnectionProvider connectionProvider = new ConnectionProvider(connectionManager, edgeHub, this.messageAckTimeout); return(connectionProvider); }) .As <Task <IConnectionProvider> >() .SingleInstance(); builder.RegisterType <MqttUsernameParser>().As <IUsernameParser>().SingleInstance(); base.Load(builder); }