private static void CreateEventHandlerSelectorTracer(ProcessorConfiguration configuration, ITraceWriter traceWriter)
{
Contract.Requires(configuration != null);
IEventHandlerSelector selector = GetService <IEventHandlerSelector>(configuration.Services);
if (selector != null && !(selector is EventHandlerSelectorTracer))
{
EventHandlerSelectorTracer tracer = new EventHandlerSelectorTracer(selector, traceWriter);
configuration.Services.Replace(typeof(IEventHandlerSelector), tracer);
}
}
/// <summary>
/// Execute the request via the worker.
/// </summary>
/// <param name="request">The <see cref="EventHandlerRequest"/> to execute.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/> to cancel the execution.</param>
/// <returns>The <see cref="Task"/> of the event.</returns>
public async Task PublishAsync(EventHandlerRequest request, CancellationToken cancellationToken)
{
if (request == null)
{
throw Error.ArgumentNull("request");
}
IEventHandlerSelector handlerSelector = this.Configuration.Services.GetEventHandlerSelector();
EventHandlersDescriptor eventDescriptor = handlerSelector.SelectHandlers(request);
var descriptors = eventDescriptor.EventHandlerDescriptors;
for (int i = 0; i < descriptors.Count; i++)
{
await InvokeHandlerAsync(descriptors[i], request, cancellationToken);
}
}
public void AddHandlerSelector(IEventHandlerSelector eventHandlerSelector)
{
HandlerSelectors.Add(eventHandlerSelector);
}
