/// <summary>
/// Fetches any pending events from the current transaction and publishes these through the event bus one by one.
/// Each event passes through several states, making it easier to track when and if an event fails to be published.
/// If any failures are detected, publishing that event will NOT be retried (no logic for handling this exists at this point).
/// </summary>
/// <param name="transactionId">The transaction id of the DbContextTransaction the given events where created during.</param>
public async Task PublishEventsThroughEventBusAsync(Guid transactionId)
{
var pendingEvents = await _integrationEventLogService.RetrieveEventLogsPendingToPublishAsync(transactionId);
foreach (var logEvent in pendingEvents)
{
try
{
await _integrationEventLogService.MarkEventAsInProgressAsync(logEvent.EventId);
_logger.LogDebug("Event {0} status marked as in progress.", logEvent.EventId);
await _eventBus.Publish(logEvent.IntegrationEvent, logEvent.EventType);
_logger.LogDebug("Published event {0} with content: {1}", logEvent.EventId, logEvent.Content);
await _integrationEventLogService.MarkEventAsPublishedAsync(logEvent.EventId);
_logger.LogDebug("Event {0} status marked as published.", logEvent.EventId);
}
catch (Exception ex)
{
await _integrationEventLogService.MarkEventAsFailedAsync(logEvent.EventId);
_logger.LogError(ex, "Event {0} status marked as failed", logEvent.EventId);
}
}
}
public async Task PublishEventsThroughEventBusAsync(Guid transactionId)
{
var pendingLogEvents = await _eventLogService.RetrieveEventLogsPendingToPublishAsync(transactionId);
foreach (var logEvt in pendingLogEvents)
{
_logger.LogInformation(
"----- Publishing integration event: {IntegrationEventId} - ({@IntegrationEvent})", logEvt.Id,
logEvt.IntegrationEvent);
try
{
await _eventLogService.MarkEventAsInProgressAsync(logEvt.Id);
_eventBus.Publish(logEvt.IntegrationEvent);
await _eventLogService.MarkEventAsPublishedAsync(logEvt.Id);
}
catch (Exception ex)
{
_logger.LogError(ex, "ERROR publishing integration event: {IntegrationEventId}", logEvt.Id);
await _eventLogService.MarkEventAsFailedAsync(logEvt.Id);
}
}
}
/// <summary>
/// Publish the events through the event bus async
/// </summary>
/// <param name="transactionId"></param>
/// <returns></returns>
public async Task PublishEventsThroughEventBusAsync(Guid transactionId)
{
// Retrieve all the pending events to be published
var pendingLogEvents = await _eventLogService.RetrieveEventLogsPendingToPublishAsync(transactionId);
// Loop through each integration event
foreach (var logEvt in pendingLogEvents)
{
// Log publishing the event
_logger.LogInformation("----- Publishing integration event: {IntegrationEventId} from {AppName} - ({@IntegrationEvent})", logEvt.EventId, Program.AppName, logEvt.IntegrationEvent);
try
{
// Mark the event as in progress
await _eventLogService.MarkEventAsInProgressAsync(logEvt.EventId);
// Publish the event
_eventBus.Publish(logEvt.IntegrationEvent);
// Mark the event as published
await _eventLogService.MarkEventAsPublishedAsync(logEvt.EventId);
}
catch (Exception ex)
{
// In case of exception, log the exception
_logger.LogError(ex, "ERROR publishing integration event: {IntegrationEventId} from {AppName}", logEvt.EventId, Program.AppName);
// Mark the event as failed
await _eventLogService.MarkEventAsFailedAsync(logEvt.EventId);
}
}
}
public async Task PublishEventsThroughEventBusAsync()
{
var pendingLogEvents = await _eventLogService.RetrieveEventLogsPendingToPublishAsync();
foreach (var logEvt in pendingLogEvents)
{
try
{
await _eventLogService.MarkEventAsInProgressAsync(logEvt.EventId);
_eventBus.Publish(logEvt.IntegrationEvent);
await _eventLogService.MarkEventAsPublishedAsync(logEvt.EventId);
}
catch (Exception)
{
await _eventLogService.MarkEventAsFailedAsync(logEvt.EventId);
}
}
}
public async Task PublishEventsThroughEventBusAsync()
{
IEnumerable <IntegrationEventLogEntry> pendingLogEvents = await _eventLogService.RetrieveEventLogsPendingToPublishAsync();
foreach (var logEvt in pendingLogEvents)
{
try
{
await _eventLogService.MarkEventAsInProgressAsync(logEvt.EventId);
_eventBus.Publish(logEvt.IntegrationEvent);
await _eventLogService.MarkEventAsPublishedAsync(logEvt.EventId);
}
catch (Exception ex)
{
_logger.LogError(ex, "ERROR publishing integration event: {IntegrationEventId} from ProductService", logEvt.EventId);
await _eventLogService.MarkEventAsFailedAsync(logEvt.EventId);
}
}
}
