/// <summary>
/// The settings provider used to bridge Service Fabric configuration information and DotNetty
/// </summary>
/// <param name="traceId">The unique identifier used to correlate debugging and diagnostics messages</param>
/// <param name="componentName">The component name used for debug and diagnostics messages</param>
/// <param name="logger">The service fabric logger to be used when writing debug and diagnostics information</param>
/// <param name="gatewayConfiguration">The gateway configuration used to get current configuration information for DotNetty</param>
/// <param name="iotHubConfiguration">The IotHub Client configuration used to get current configuration information for DotNetty</param>
/// <param name="mqttConfiguration">The MQTT configuration used to get current configuration information for DotNetty</param>
public ServiceFabricConfigurationProvider(Guid traceId, string componentName, IServiceLogger logger, GatewayConfiguration gatewayConfiguration, IoTHubConfiguration iotHubConfiguration, MqttServiceConfiguration mqttConfiguration)
{
this.componentName = componentName;
this.logger = logger;
this.logger.Verbose(traceId, this.componentName, "Initializing configuration provider.");
var baseProperties = new Dictionary<string, string>();
foreach (PropertyInfo element in typeof(GatewayConfiguration).GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (!element.PropertyType.IsArray)
{
object value = element.GetValue(gatewayConfiguration, null);
baseProperties.Add(element.Name, element.PropertyType == typeof(string) ? value as string : value.ToString());
}
}
foreach (PropertyInfo element in typeof(MqttServiceConfiguration).GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (!element.PropertyType.IsArray)
{
object value = element.GetValue(mqttConfiguration, null);
baseProperties.Add(element.Name, element.PropertyType == typeof(string) ? value as string : value.ToString());
}
}
foreach (PropertyInfo element in typeof(IoTHubConfiguration).GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (!element.PropertyType.IsArray)
{
object value = element.GetValue(iotHubConfiguration, null);
baseProperties.Add($"IotHubClient.{element.Name}", value?.ToString());
}
}
this.configurationValues = baseProperties.ToImmutableDictionary();
this.logger.Informational(traceId, this.componentName, "Initializing configuration provider complete.");
}
/// <summary>
/// The settings provider used to bridge Service Fabric configuration information and DotNetty
/// </summary>
/// <param name="traceId">The unique identifier used to correlate debugging and diagnostics messages</param>
/// <param name="componentName">The component name used for debug and diagnostics messages</param>
/// <param name="logger">The service fabric logger to be used when writing debug and diagnostics information</param>
/// <param name="gatewayConfiguration">The gateway configuration used to get current configuration information for DotNetty</param>
/// <param name="iotHubConfiguration">The IotHub Client configuration used to get current configuration information for DotNetty</param>
/// <param name="mqttConfiguration">The MQTT configuration used to get current configuration information for DotNetty</param>
public ServiceFabricConfigurationProvider(Guid traceId, string componentName, IServiceLogger logger, GatewayConfiguration gatewayConfiguration, IoTHubConfiguration iotHubConfiguration, MqttServiceConfiguration mqttConfiguration)
{
this.componentName = componentName;
this.logger = logger;
this.logger.Verbose(traceId, this.componentName, "Initializing configuration provider.");
var baseProperties = new Dictionary <string, string>();
foreach (PropertyInfo element in typeof(GatewayConfiguration).GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (!element.PropertyType.IsArray)
{
object value = element.GetValue(gatewayConfiguration, null);
baseProperties.Add(element.Name, element.PropertyType == typeof(string) ? value as string : value.ToString());
}
}
foreach (PropertyInfo element in typeof(MqttServiceConfiguration).GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (!element.PropertyType.IsArray)
{
object value = element.GetValue(mqttConfiguration, null);
baseProperties.Add(element.Name, element.PropertyType == typeof(string) ? value as string : value.ToString());
}
}
foreach (PropertyInfo element in typeof(IoTHubConfiguration).GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (!element.PropertyType.IsArray)
{
object value = element.GetValue(iotHubConfiguration, null);
baseProperties.Add($"IotHubClient.{element.Name}", value?.ToString());
}
}
this.configurationValues = baseProperties.ToImmutableDictionary();
this.logger.Informational(traceId, this.componentName, "Initializing configuration provider complete.");
}
/// <summary>
/// Retrieves the state provider for QoS 2 sessions
/// </summary>
/// <param name="traceId">A unique identifier used to correlate debugging and diagnostics messages</param>
/// <param name="configuration">The gateway configuration</param>
/// <returns>A Qos2 persistence provider if available</returns>
async Task<IQos2StatePersistenceProvider> GetQos2StateProvider(Guid traceId, MqttServiceConfiguration configuration)
{
IQos2StatePersistenceProvider stateProvider = null;
this.logger.Informational(traceId, this.componentName, "QOS2 state provider requested.");
switch (configuration.MqttQoS2StateProvider)
{
case MqttServiceConfiguration.QosStateType.AzureStorage:
this.logger.Informational(traceId, this.componentName, "QOS2 state provider requested was Azure Storage.");
AzureSessionStateConfiguration provider = new ConfigurationProvider<AzureSessionStateConfiguration>(traceId, this.serviceContext.ServiceName,
this.serviceContext.CodePackageActivationContext, this.logger, "AzureState")?.Config;
if (provider == null)
{
this.logger.Critical(traceId, this.componentName, "QOS2 state provider or configuration could not be retrieved.");
throw new ApplicationException("Azure state QoS2 provider configuration could not be retrieved");
}
stateProvider = await TableQos2StatePersistenceProvider.CreateAsync(provider.TableConnectionString, provider.TableName).ConfigureAwait(false);
this.logger.Informational(traceId, this.componentName, "QOS2 state provider request complete.");
break;
case MqttServiceConfiguration.QosStateType.ServiceFabricStateful:
this.logger.Critical(traceId, this.componentName, "QOS2 state provider requested was Service Fabric Stateful Service but it is not currently implemented.");
throw new NotImplementedException("Only azure storage provider is supported");
default:
this.logger.Critical(traceId, this.componentName, "QOS2 state provider requested was unknown.");
throw new ApplicationException("MQTT state provider must be specified in configuration.");
}
return stateProvider;
}
/// <summary>
/// Retrieves the session state provider to be used for MQTT Sessions
/// </summary>
/// <param name="traceId">A unique identifier used to correlate debugging and diagnostics messages</param>
/// <param name="configuration">The gateway configuration</param>
/// <returns>A session state persistence provider if available</returns>
async Task<ISessionStatePersistenceProvider> GetSessionStateProviderAsync(Guid traceId, MqttServiceConfiguration configuration)
{
ISessionStatePersistenceProvider stateProvider = null;
this.logger.Informational(traceId, this.componentName, "QOS state provider requested.");
switch (configuration.MqttQoSStateProvider)
{
case MqttServiceConfiguration.QosStateType.AzureStorage:
this.logger.Informational(traceId, this.componentName, "QOS state provider requested was Azure Storage.");
var azureConfigurationProvider = new ConfigurationProvider<AzureSessionStateConfiguration>(traceId, this.serviceContext.ServiceName, this.serviceContext.CodePackageActivationContext, this.logger, "AzureState");
azureConfigurationProvider.ConfigurationChangedEvent += (sender, args) => this.unsupportedConfigurationChangeCallback?.Invoke();
azureConfigurationProvider.ConfigurationPropertyChangedEvent += (sender, args) => this.unsupportedConfigurationChangeCallback?.Invoke();
AzureSessionStateConfiguration azureConfiguration = azureConfigurationProvider.Config;
if (azureConfiguration == null)
{
this.logger.Critical(traceId, this.componentName, "QOS state provider or configuration could not be retrieved.");
throw new ApplicationException("Azure state QoS provider configuration could not be retrieved");
}
stateProvider = await BlobSessionStatePersistenceProvider.CreateAsync(azureConfiguration.BlobConnectionString, azureConfiguration.ContainerName).ConfigureAwait(false);
this.logger.Informational(traceId, this.componentName, "QOS state provider request complete.");
break;
case MqttServiceConfiguration.QosStateType.ServiceFabricStateful:
this.logger.Critical(traceId, this.componentName, "QOS state provider requested was Service Fabric Stateful Service but it is not currently implemented.");
throw new NotImplementedException("Only azure storage provider is supported");
default:
this.logger.Critical(traceId, this.componentName, "QOS state provider requested was unknown.");
throw new ApplicationException("MQTT state provider must be specified in configuration.");
}
return stateProvider;
}