public override async Task StartAsync(CancellationToken cancellationToken)
{
if (!await _elasticSearchService.CheckIndex(ElasticSearchIndexDocumentNames.EmployeeIndexName))
{
await _elasticSearchService.CretaeIndex <ProductViewModel>(ElasticSearchIndexDocumentNames.EmployeeIndexName,
ElasticSearchIndexDocumentNames.EmployeeIndexAliasName);
}
var lastCheckpoint = await new CreateAndUpdatePointDocumentIndex(_elasticSearchService).addPointDocument(
ElasticSearchIndexDocumentNames.EmployeeDocumentPositionIndexName,
ElasticSearchIndexDocumentNames.EmployeeDocumentPositionAliasName,
ElasticSearchIndexDocumentNames.EmployeeDocumentPositionName);
var settings = new CatchUpSubscriptionSettings(
maxLiveQueueSize: 10000,
readBatchSize: 500,
verboseLogging: false,
resolveLinkTos: false,
subscriptionName: "employee");
subscription = _eventStore.SubscribeToAllFrom(
lastCheckpoint: lastCheckpoint,
settings: settings,
eventAppeared: async(sub, @event) =>
{
if (@event.OriginalEvent.EventType.StartsWith("$"))
{
return;
}
try
{
var eventType = Type.GetType(Encoding.UTF8.GetString(@event.OriginalEvent.Metadata) + ",NorthwindApi.Domain");
var eventData = Newtonsoft.Json.JsonConvert.DeserializeObject(Encoding.UTF8.GetString(@event.OriginalEvent.Data), eventType);
if (eventType != typeof(EmployeeAddEvent) && eventType != typeof(EmployeeUpdateEvent) && eventType != typeof(EmployeeRemoveEvent))
{
return;
}
var eventSaveData = CreateViewModel(eventData);
if (eventType == typeof(EmployeeAddEvent) || eventType == typeof(EmployeeUpdateEvent))
{
await _elasticSearchService.AddOrUpdateIndex <EmployeeViewModel>(ElasticSearchIndexDocumentNames.EmployeeIndexName,
ElasticSearchIndexDocumentNames.EmployeeIndexAliasName, eventSaveData);
}
else
{
await _elasticSearchService.Delete <EmployeeViewModel>(ElasticSearchIndexDocumentNames.EmployeeIndexName, eventSaveData.Id);
}
await new CreateAndUpdatePointDocumentIndex(_elasticSearchService).UpdatePointDocument(
ElasticSearchIndexDocumentNames.EmployeeDocumentPositionIndexName,
ElasticSearchIndexDocumentNames.EmployeeDocumentPositionAliasName,
ElasticSearchIndexDocumentNames.EmployeeDocumentPositionName, @event.OriginalPosition.GetValueOrDefault());
}
catch (Exception exception)
{
_logger.LogError(exception, exception.Message);
}
},
liveProcessingStarted: (sub) =>
{
_logger.LogInformation("{SubscriptionName} subscription started.", sub.SubscriptionName);
},
subscriptionDropped: (sub, subDropReason, exception) =>
{
_logger.LogWarning("{SubscriptionName} dropped. Reason: {SubDropReason}.", sub.SubscriptionName, subDropReason);
});
}