public static async Task Main()
{
var config = GetEnvironmentConfig();
var eventHubName = GetEventHubName(config);
var eventHubOptions = GetEventHubInfo(config, eventHubName);
EnsureArg.IsNotNullOrWhiteSpace(eventHubOptions.EventHubConnectionString);
EnsureArg.IsNotNullOrWhiteSpace(eventHubOptions.EventHubName);
var serviceCollection = GetRequiredServiceCollection(config, eventHubName);
var serviceProvider = serviceCollection.BuildServiceProvider();
var logger = serviceProvider.GetRequiredService <ITelemetryLogger>();
var blobContainerClientFactory = new BlobContainerClientFactory();
var eventConsumers = GetEventConsumers(config, eventHubName, serviceProvider, blobContainerClientFactory, logger);
var storageOptions = new StorageCheckpointOptions();
config.GetSection(StorageCheckpointOptions.Settings).Bind(storageOptions);
var checkpointContainerOptions = new BlobContainerClientOptions();
config.GetSection("CheckpointStorage").Bind(checkpointContainerOptions);
var storageCheckpointClient = GetStorageCheckpointClient(blobContainerClientFactory, checkpointContainerOptions, storageOptions, logger, eventHubName);
var eventConsumerService = new EventConsumerService(eventConsumers, logger);
var incomingEventReader = GetEventProcessorClient(storageCheckpointClient.GetBlobContainerClient(), eventHubOptions);
var eventHubReader = GetEventProcessor(config, eventConsumerService, storageCheckpointClient, logger);
System.Console.WriteLine($"Reading from event hub: {eventHubName}");
var ct = new CancellationToken();
await eventHubReader.RunAsync(incomingEventReader, ct);
}
public static StorageCheckpointClient GetStorageCheckpointClient(BlobContainerClientFactory factory, BlobContainerClientOptions containerOptions, StorageCheckpointOptions options, ITelemetryLogger logger, string prefix)
{
var checkpointBlobClient = factory.CreateStorageClient(containerOptions);
options.BlobPrefix = prefix;
var checkpointClient = new StorageCheckpointClient(checkpointBlobClient, options, logger);
return(checkpointClient);
}
public static TemplateManager GetMappingTemplateManager(IConfiguration config, BlobContainerClientFactory blobClientFactory)
{
var containerOptions = new BlobContainerClientOptions();
config.GetSection("TemplateStorage").Bind(containerOptions);
var containerClient = blobClientFactory.CreateStorageClient(containerOptions);
var storageManager = new StorageManager(containerClient);
var templateManager = new TemplateManager(storageManager);
return(templateManager);
}
public static List <IEventConsumer> GetEventConsumers(IConfiguration config, string inputEventHub, ServiceProvider sp, BlobContainerClientFactory blobClientFactory, ITelemetryLogger logger)
{
var eventConsumers = new List <IEventConsumer>();
var templateManager = GetMappingTemplateManager(config, blobClientFactory);
if (inputEventHub == "devicedata")
{
var template = config.GetSection("Template:DeviceContent").Value;
var deviceDataNormalization = new Normalize.Processor(template, templateManager, config, sp.GetRequiredService <IOptions <EventHubMeasurementCollectorOptions> >(), logger);
eventConsumers.Add(deviceDataNormalization);
}
else if (inputEventHub == "normalizeddata")
{
var template = config.GetSection("Template:FhirMapping").Value;
var measurementImportService = ResolveMeasurementService(sp);
var measurementToFhirConsumer = new MeasurementCollectionToFhir.Processor(template, templateManager, measurementImportService, logger);
eventConsumers.Add(measurementToFhirConsumer);
}
if (config.GetSection("Console:Debug")?.Value == "true")
{
eventConsumers.Add(new EventPrinter());
}
return(eventConsumers);
}