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284 changes: 142 additions & 142 deletions
284
...ureEventGridSimulator/Domain/Commands/SendNotificationEventsToSubscriberCommandHandler.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,142 +1,142 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Net.Http; | ||
| using System.Text; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
| using AzureEventGridSimulator.Domain.Entities; | ||
| using AzureEventGridSimulator.Infrastructure.Extensions; | ||
| using AzureEventGridSimulator.Infrastructure.Settings; | ||
| using MediatR; | ||
| using Microsoft.Extensions.Logging; | ||
| using Newtonsoft.Json; | ||
|
|
||
| namespace AzureEventGridSimulator.Domain.Commands; | ||
|
|
||
| // ReSharper disable once UnusedMember.Global | ||
| public class SendNotificationEventsToSubscriberCommandHandler : AsyncRequestHandler<SendNotificationEventsToSubscriberCommand> | ||
| { | ||
| private readonly IHttpClientFactory _httpClientFactory; | ||
| private readonly ILogger<SendNotificationEventsToSubscriberCommandHandler> _logger; | ||
|
|
||
| public SendNotificationEventsToSubscriberCommandHandler(IHttpClientFactory httpClientFactory, ILogger<SendNotificationEventsToSubscriberCommandHandler> logger) | ||
| { | ||
| _httpClientFactory = httpClientFactory; | ||
| _logger = logger; | ||
| } | ||
|
|
||
| protected override Task Handle(SendNotificationEventsToSubscriberCommand request, CancellationToken cancellationToken) | ||
| { | ||
| _logger.LogInformation("{EventCount} event(s) received on topic '{TopicName}'", request.Events.Length, request.Topic.Name); | ||
|
|
||
| foreach (var eventGridEvent in request.Events) | ||
| { | ||
| eventGridEvent.Topic = $"/subscriptions/{Guid.Empty:D}/resourceGroups/eventGridSimulator/providers/Microsoft.EventGrid/topics/{request.Topic.Name}"; | ||
| eventGridEvent.MetadataVersion = "1"; | ||
| } | ||
|
|
||
| if (!request.Topic.Subscribers.Any()) | ||
| { | ||
| _logger.LogWarning("'{TopicName}' has no subscribers so {EventCount} event(s) could not be forwarded", request.Topic.Name, request.Events.Length); | ||
| } | ||
| else if (request.Topic.Subscribers.All(o => o.Disabled)) | ||
| { | ||
| _logger.LogWarning("'{TopicName}' has no enabled subscribers so {EventCount} event(s) could not be forwarded", request.Topic.Name, request.Events.Length); | ||
| } | ||
| else | ||
| { | ||
| var eventsFilteredOutByAllSubscribers = request.Events | ||
| .Where(e => request.Topic.Subscribers.All(s => !s.Filter.AcceptsEvent(e))) | ||
| .ToArray(); | ||
|
|
||
| if (eventsFilteredOutByAllSubscribers.Any()) | ||
| { | ||
| foreach (var eventFilteredOutByAllSubscribers in eventsFilteredOutByAllSubscribers) | ||
| { | ||
| _logger.LogWarning("All subscribers of topic '{TopicName}' filtered out event {EventId}", | ||
| request.Topic.Name, | ||
| eventFilteredOutByAllSubscribers.Id); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| foreach (var subscription in request.Topic.Subscribers) | ||
| { | ||
| #pragma warning disable 4014 | ||
| SendToSubscriber(subscription, request.Events, request.Topic.Name); | ||
| #pragma warning restore 4014 | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return Task.CompletedTask; | ||
| } | ||
|
|
||
| private async Task SendToSubscriber(SubscriptionSettings subscription, IEnumerable<EventGridEvent> events, string topicName) | ||
| { | ||
| try | ||
| { | ||
| if (subscription.Disabled) | ||
| { | ||
| _logger.LogWarning("Subscription '{SubscriberName}' on topic '{TopicName}' is disabled and so Notification was skipped", subscription.Name, topicName); | ||
| return; | ||
| } | ||
|
|
||
| if (!subscription.DisableValidation && | ||
| subscription.ValidationStatus != SubscriptionValidationStatus.ValidationSuccessful) | ||
| { | ||
| _logger.LogWarning("Subscription '{SubscriberName}' on topic '{TopicName}' can't receive events. It's still pending validation", subscription.Name, topicName); | ||
| return; | ||
| } | ||
|
|
||
| _logger.LogDebug("Sending to subscriber '{SubscriberName}' on topic '{TopicName}'", subscription.Name, topicName); | ||
|
|
||
| // "Event Grid sends the events to subscribers in an array that has a single event. This behaviour may change in the future." | ||
| // https://docs.microsoft.com/en-us/azure/event-grid/event-schema | ||
| foreach (var evt in events) | ||
| { | ||
| if (subscription.Filter.AcceptsEvent(evt)) | ||
| { | ||
| var json = JsonConvert.SerializeObject(new[] { evt }, Formatting.Indented); | ||
| using var content = new StringContent(json, Encoding.UTF8, "application/json"); | ||
| var httpClient = _httpClientFactory.CreateClient(); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegEventTypeHeader, Constants.NotificationEventType); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegSubscriptionNameHeader, subscription.Name.ToUpperInvariant()); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegDataVersionHeader, evt.DataVersion); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegMetadataVersionHeader, evt.MetadataVersion); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegDeliveryCountHeader, "0"); // TODO implement re-tries | ||
| httpClient.Timeout = TimeSpan.FromSeconds(60); | ||
|
|
||
| await httpClient.PostAsync(subscription.Endpoint, content) | ||
| .ContinueWith(t => LogResult(t, evt, subscription, topicName)); | ||
| } | ||
| else | ||
| { | ||
| _logger.LogDebug("Event {EventId} filtered out for subscriber '{SubscriberName}'", evt.Id, subscription.Name); | ||
| } | ||
| } | ||
| } | ||
| catch (Exception ex) | ||
| { | ||
| _logger.LogError(ex, "Failed to send to subscriber '{SubscriberName}'", subscription.Name); | ||
| } | ||
| } | ||
|
|
||
| private void LogResult(Task<HttpResponseMessage> task, EventGridEvent evt, SubscriptionSettings subscription, string topicName) | ||
| { | ||
| if (task.IsCompletedSuccessfully && task.Result.IsSuccessStatusCode) | ||
| { | ||
| _logger.LogDebug("Event {EventId} sent to subscriber '{SubscriberName}' on topic '{TopicName}' successfully", evt.Id, subscription.Name, topicName); | ||
| } | ||
| else | ||
| { | ||
| _logger.LogError(task.Exception?.GetBaseException(), | ||
| "Failed to send event {EventId} to subscriber '{SubscriberName}', '{TaskStatus}', '{Reason}'", | ||
| evt.Id, | ||
| subscription.Name, | ||
| task.Status.ToString(), | ||
| task.Result?.ReasonPhrase); | ||
| } | ||
| } | ||
| } | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Net.Http; | ||
| using System.Text; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
| using AzureEventGridSimulator.Domain.Entities; | ||
| using AzureEventGridSimulator.Infrastructure.Extensions; | ||
| using AzureEventGridSimulator.Infrastructure.Settings; | ||
| using MediatR; | ||
| using Microsoft.Extensions.Logging; | ||
| using Newtonsoft.Json; | ||
|
|
||
| namespace AzureEventGridSimulator.Domain.Commands; | ||
|
|
||
| // ReSharper disable once UnusedMember.Global | ||
| public class SendNotificationEventsToSubscriberCommandHandler : IRequestHandler<SendNotificationEventsToSubscriberCommand> | ||
| { | ||
| private readonly IHttpClientFactory _httpClientFactory; | ||
| private readonly ILogger<SendNotificationEventsToSubscriberCommandHandler> _logger; | ||
|
|
||
| public SendNotificationEventsToSubscriberCommandHandler(IHttpClientFactory httpClientFactory, ILogger<SendNotificationEventsToSubscriberCommandHandler> logger) | ||
| { | ||
| _httpClientFactory = httpClientFactory; | ||
| _logger = logger; | ||
| } | ||
|
|
||
| public Task Handle(SendNotificationEventsToSubscriberCommand request, CancellationToken cancellationToken) | ||
| { | ||
| _logger.LogInformation("{EventCount} event(s) received on topic '{TopicName}'", request.Events.Length, request.Topic.Name); | ||
|
|
||
| foreach (var eventGridEvent in request.Events) | ||
| { | ||
| eventGridEvent.Topic = $"/subscriptions/{Guid.Empty:D}/resourceGroups/eventGridSimulator/providers/Microsoft.EventGrid/topics/{request.Topic.Name}"; | ||
| eventGridEvent.MetadataVersion = "1"; | ||
| } | ||
|
|
||
| if (!request.Topic.Subscribers.Any()) | ||
| { | ||
| _logger.LogWarning("'{TopicName}' has no subscribers so {EventCount} event(s) could not be forwarded", request.Topic.Name, request.Events.Length); | ||
| } | ||
| else if (request.Topic.Subscribers.All(o => o.Disabled)) | ||
| { | ||
| _logger.LogWarning("'{TopicName}' has no enabled subscribers so {EventCount} event(s) could not be forwarded", request.Topic.Name, request.Events.Length); | ||
| } | ||
| else | ||
| { | ||
| var eventsFilteredOutByAllSubscribers = request.Events | ||
| .Where(e => request.Topic.Subscribers.All(s => !s.Filter.AcceptsEvent(e))) | ||
| .ToArray(); | ||
|
|
||
| if (eventsFilteredOutByAllSubscribers.Any()) | ||
| { | ||
| foreach (var eventFilteredOutByAllSubscribers in eventsFilteredOutByAllSubscribers) | ||
| { | ||
| _logger.LogWarning("All subscribers of topic '{TopicName}' filtered out event {EventId}", | ||
| request.Topic.Name, | ||
| eventFilteredOutByAllSubscribers.Id); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| foreach (var subscription in request.Topic.Subscribers) | ||
| { | ||
| #pragma warning disable 4014 | ||
| SendToSubscriber(subscription, request.Events, request.Topic.Name); | ||
| #pragma warning restore 4014 | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return Task.CompletedTask; | ||
| } | ||
|
|
||
| private async Task SendToSubscriber(SubscriptionSettings subscription, IEnumerable<EventGridEvent> events, string topicName) | ||
| { | ||
| try | ||
| { | ||
| if (subscription.Disabled) | ||
| { | ||
| _logger.LogWarning("Subscription '{SubscriberName}' on topic '{TopicName}' is disabled and so Notification was skipped", subscription.Name, topicName); | ||
| return; | ||
| } | ||
|
|
||
| if (!subscription.DisableValidation && | ||
| subscription.ValidationStatus != SubscriptionValidationStatus.ValidationSuccessful) | ||
| { | ||
| _logger.LogWarning("Subscription '{SubscriberName}' on topic '{TopicName}' can't receive events. It's still pending validation", subscription.Name, topicName); | ||
| return; | ||
| } | ||
|
|
||
| _logger.LogDebug("Sending to subscriber '{SubscriberName}' on topic '{TopicName}'", subscription.Name, topicName); | ||
|
|
||
| // "Event Grid sends the events to subscribers in an array that has a single event. This behaviour may change in the future." | ||
| // https://docs.microsoft.com/en-us/azure/event-grid/event-schema | ||
| foreach (var evt in events) | ||
| { | ||
| if (subscription.Filter.AcceptsEvent(evt)) | ||
| { | ||
| var json = JsonConvert.SerializeObject(new[] { evt }, Formatting.Indented); | ||
| using var content = new StringContent(json, Encoding.UTF8, "application/json"); | ||
| var httpClient = _httpClientFactory.CreateClient(); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegEventTypeHeader, Constants.NotificationEventType); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegSubscriptionNameHeader, subscription.Name.ToUpperInvariant()); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegDataVersionHeader, evt.DataVersion); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegMetadataVersionHeader, evt.MetadataVersion); | ||
| httpClient.DefaultRequestHeaders.Add(Constants.AegDeliveryCountHeader, "0"); // TODO implement re-tries | ||
| httpClient.Timeout = TimeSpan.FromSeconds(60); | ||
|
|
||
| await httpClient.PostAsync(subscription.Endpoint, content) | ||
| .ContinueWith(t => LogResult(t, evt, subscription, topicName)); | ||
| } | ||
| else | ||
| { | ||
| _logger.LogDebug("Event {EventId} filtered out for subscriber '{SubscriberName}'", evt.Id, subscription.Name); | ||
| } | ||
| } | ||
| } | ||
| catch (Exception ex) | ||
| { | ||
| _logger.LogError(ex, "Failed to send to subscriber '{SubscriberName}'", subscription.Name); | ||
| } | ||
| } | ||
|
|
||
| private void LogResult(Task<HttpResponseMessage> task, EventGridEvent evt, SubscriptionSettings subscription, string topicName) | ||
| { | ||
| if (task.IsCompletedSuccessfully && task.Result.IsSuccessStatusCode) | ||
| { | ||
| _logger.LogDebug("Event {EventId} sent to subscriber '{SubscriberName}' on topic '{TopicName}' successfully", evt.Id, subscription.Name, topicName); | ||
| } | ||
| else | ||
| { | ||
| _logger.LogError(task.Exception?.GetBaseException(), | ||
| "Failed to send event {EventId} to subscriber '{SubscriberName}', '{TaskStatus}', '{Reason}'", | ||
| evt.Id, | ||
| subscription.Name, | ||
| task.Status.ToString(), | ||
| task.Result?.ReasonPhrase); | ||
| } | ||
| } | ||
| } |
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