/// <inheritdoc />
public EventHubContentLocationEventStore(
ContentLocationEventStoreConfiguration configuration,
IContentLocationEventHandler eventHandler,
string localMachineName,
CentralStorage centralStorage,
Interfaces.FileSystem.AbsolutePath workingDirectory)
: base(configuration, nameof(EventHubContentLocationEventStore), eventHandler, centralStorage, workingDirectory)
{
Contract.Requires(configuration.MaxEventProcessingConcurrency >= 1);
_configuration = configuration;
_localMachineName = localMachineName;
_eventHubClient = CreateEventHubClient(configuration);
_extraEventHubClientRetryPolicy = CreateEventHubClientRetryPolicy();
if (configuration.MaxEventProcessingConcurrency > 1)
{
_eventProcessingBlocks =
Enumerable.Range(1, configuration.MaxEventProcessingConcurrency)
.Select(
(_, index) =>
{
var serializer = new ContentLocationEventDataSerializer(configuration.SelfCheckSerialization ? ValidationMode.Trace : ValidationMode.Off);
return(new ActionBlock <ProcessEventsInput>(
t => ProcessEventsCoreAsync(t, serializer, index: index),
new ExecutionDataflowBlockOptions()
{
MaxDegreeOfParallelism = 1,
BoundedCapacity = configuration.EventProcessingMaxQueueSize,
}));
})
.ToArray();
}
}
/// <summary>
/// Factory method for creating an instance of <see cref="ContentLocationEventStore"/> based on <paramref name="configuration"/>.
/// </summary>
public static IEventHubClient CreateEventHubClient(ContentLocationEventStoreConfiguration configuration)
{
Contract.Requires(configuration != null);
switch (configuration)
{
case EventHubContentLocationEventStoreConfiguration azureConfig:
return(new AzureEventHubClient(azureConfig));
case MemoryContentLocationEventStoreConfiguration memoryConfig:
return(new MemoryEventHubClient(memoryConfig));
default:
throw new InvalidOperationException($"Unknown EventStore type '{configuration.GetType()}'.");
}
}