public static async Task <EventHubsConnectionStringBuilder> GetEventHubConnectionStringBuilder(string sectionName, Action <string> onFailure, CancellationToken ct)
{
var configuration = new FabricConfigurationProvider(sectionName);
if (!configuration.HasConfiguration)
{
await configuration.RejectConfigurationAsync($"No {sectionName} section", onFailure, ct).ConfigureAwait(false);
return(null);
}
try
{
var endpointAddress = await configuration.TryReadConfigurationAsync("EndpointAddress", onFailure, ct).ConfigureAwait(false);
var builder = new EventHubsConnectionStringBuilder(
new Uri($"amqps://{endpointAddress}"),
await configuration.TryReadConfigurationAsync("EntityPath", onFailure, ct).ConfigureAwait(false),
await configuration.TryReadConfigurationAsync("SharedAccessKeyName", onFailure, ct).ConfigureAwait(false),
await configuration.TryReadConfigurationAsync("SharedAccessKey", onFailure, ct).ConfigureAwait(false)
);
return(builder);
}
catch (Exception ex)
{
ct.ThrowIfCancellationRequested();
#pragma warning disable ERP023 // Only ex.Message property was observed in exception block!
await configuration.RejectConfigurationAsync($"Exception creating connection string builder: {ex.Message}", onFailure, ct).ConfigureAwait(false);
#pragma warning restore ERP023 // Only ex.Message property was observed in exception block!
return(null);
}
}
protected virtual async Task <Configuration> TryConfigureAsync(CancellationToken ct)
{
try
{
void onFailure(string msg) => Log.Error("Error configuring: {Msg}", msg);
var client = await EventHubConfiguration.GetEventHubClientAsync(ConfigurationSectionName, onFailure, ct).ConfigureAwait(false);
var configuration = new FabricConfigurationProvider(ConfigurationSectionName);
var consumerGroup = await configuration.TryReadConfigurationAsync("ConsumerGroup", onFailure, ct).ConfigureAwait(false);
var partitions = await GetPartitionsAsync(client).ConfigureAwait(false);
var offsets = await StateManager.GetOrAddAsync <IReliableDictionary <string, string> >(OffsetsName).ConfigureAwait(false);
return(new Configuration(client, consumerGroup, partitions, offsets));
}
catch (Exception ex)
{
ct.ThrowIfCancellationRequested();
Log.Fatal(ex, "Error configuring event hubs: {Exception}", ex.Message);
throw;
}
}