public static async Task<EventHubMonitor> CreateAsync(
Configuration configuration,
TimeSpan pauseBetweenParitions,
TimeSpan pauseAfterAllPartitions
)
{
var nsm = CreateNamespaceManager(configuration, pauseBetweenParitions);
// We create a partially applied function so that
// we'll only need to pass the partition id later.
Func<string, Task<PartitionDescription>> getEventHubPartitionAsync =
partitionId => nsm.GetEventHubPartitionAsync(configuration.EventHubName, configuration.ConsumerGroupName, partitionId);
var eventhub = await nsm.GetEventHubAsync(configuration.EventHubName).ConfigureAwait(false);
// Construct a reference to the blob container.
var storageAccount = CloudStorageAccount.Parse(configuration.CheckpointStorageAccount);
var blobClient = storageAccount.CreateCloudBlobClient();
var checkpointContainer = blobClient.GetContainerReference(configuration.EventHubName);
// The `PartitionCheckpointManager` manages the complexity
// of getting the latest checkpoint for each parition.
var checkpoints = new PartitionCheckpointManager(
configuration.ConsumerGroupName,
eventhub.PartitionIds,
checkpointContainer
);
return new EventHubMonitor(
eventhub.PartitionIds,
checkpoints.GetLastCheckpointAsync,
getEventHubPartitionAsync,
pauseBetweenParitions,
pauseAfterAllPartitions);
}
private static NamespaceManager CreateNamespaceManager(Configuration configuration, TimeSpan timeout)
{
var endpoint = ServiceBusEnvironment.CreateServiceUri("sb", configuration.EventHubNamespace, string.Empty);
var connectionString = ServiceBusConnectionStringBuilder.CreateUsingSharedAccessKey(endpoint,
configuration.EventHubSasKeyName,
configuration.EventHubSasKey);
var nsm = NamespaceManager.CreateFromConnectionString(connectionString);
nsm.Settings.OperationTimeout = timeout;
return nsm;
}
public static Task<EventHubMonitor> CreateAsync(Configuration configuration)
{
return CreateAsync(configuration,
TimeSpan.FromSeconds(2),
TimeSpan.FromSeconds(30));
}