/// <summary>
/// Gets the <see cref="ScopedEventProcessor" /> registered for the specified key or null if none is registered
/// </summary>
/// <param name="key">Key to search for</param>
/// <returns>The registered <see cref="IEnumerable{ScopedEventProcessor}" /> for the key or null if none is registered</returns>
public IEnumerable <ScopedEventProcessor> GetProcessorsFor(ScopedEventProcessorKey key)
{
ConcurrentDictionary <EventProcessorId, ScopedEventProcessor> processors;
var dictionary = _scopedProcessors.TryGetValue(key, out processors) ? processors : null;
return(dictionary?.Values.ToArray() ?? Enumerable.Empty <ScopedEventProcessor>());
}
/// <summary>
/// Instantiates an instance of <see cref="ScopedEventProcessor" />
/// </summary>
/// <param name="tenant">The <see cref="TenantId" /> that this processor is scoped to.</param>
/// <param name="processor">An <see cref="IEventProcessor" /> to process the event</param>
/// <param name="getOffsetRepository">A factory function to return a correctly scoped instance of <see cref="IEventProcessorOffsetRepository" /></param>
/// <param name="getUnprocessedEventsFetcher">A factory function to return a correctly scoped instance of <see cref="IFetchUnprocessedEvents" /></param>
/// <param name="logger">An <see cref="ILogger" /> to log messages</param>
public ScopedEventProcessor(TenantId tenant, IEventProcessor processor, FactoryFor <IEventProcessorOffsetRepository> getOffsetRepository,
FactoryFor <IFetchUnprocessedEvents> getUnprocessedEventsFetcher, ILogger logger)
{
LastVersionProcessed = CommittedEventVersion.None;
_tenant = tenant;
_processor = processor;
_logger = logger;
Key = new ScopedEventProcessorKey(tenant, processor.Event);
_getUnprocessedEventsFetcher = getUnprocessedEventsFetcher;
_getOffsetRepository = getOffsetRepository;
}
void Process(CommittedEventEnvelope envelope, ExecutionContext executionContext)
{
ConcurrentDictionary <EventProcessorId, ScopedEventProcessor> processors = null;
var key = new ScopedEventProcessorKey(executionContext.Tenant, envelope.Metadata.Artifact);
if (_scopedProcessors.TryGetValue(key, out processors))
{
if (processors?.Values.Any() ?? false)
{
processors.Values.ForEach(_ => _.Process(envelope));
}
}
if (processors == null || processors.Count == 0)
{
_logger.Warning($"No Processor registered for {key}");
}
}