| | | 1 | | using Elsa.Common; |
| | | 2 | | using Elsa.UserTasks.Contracts; |
| | | 3 | | using Elsa.UserTasks.Models; |
| | | 4 | | using Elsa.UserTasks.Options; |
| | | 5 | | using Microsoft.Extensions.DependencyInjection; |
| | | 6 | | using Microsoft.Extensions.Hosting; |
| | | 7 | | using Microsoft.Extensions.Logging; |
| | | 8 | | using Microsoft.Extensions.Options; |
| | | 9 | | |
| | | 10 | | namespace Elsa.UserTasks.HostedServices; |
| | | 11 | | |
| | | 12 | | /// <summary> |
| | | 13 | | /// Shared plumbing for the User Tasks background workers: a periodic loop that never lets one failed pass |
| | | 14 | | /// tear down the host, and a bounded scope per pass so scoped providers can be resolved safely. |
| | | 15 | | /// </summary> |
| | | 16 | | public abstract class UserTaskPeriodicWorker(IServiceScopeFactory scopeFactory, IOptions<UserTasksOptions> options, ILog |
| | | 17 | | { |
| | | 18 | | protected UserTasksOptions Options { get; } = options.Value; |
| | | 19 | | |
| | | 20 | | protected abstract TimeSpan Interval { get; } |
| | | 21 | | |
| | | 22 | | protected abstract Task ExecutePassAsync(IServiceProvider services, CancellationToken cancellationToken); |
| | | 23 | | |
| | | 24 | | /// <summary>The tenants a pass sweeps. Defaults to the configured default tenant when no catalog is set.</summary> |
| | | 25 | | protected IReadOnlyCollection<string> TenantIds => Options.WorkerTenantIds.Count > 0 |
| | | 26 | | ? Options.WorkerTenantIds.ToArray() |
| | | 27 | | : [Options.DefaultTenantId]; |
| | | 28 | | |
| | | 29 | | protected override async Task ExecuteAsync(CancellationToken stoppingToken) |
| | | 30 | | { |
| | | 31 | | using var timer = new PeriodicTimer(Interval); |
| | | 32 | | while (!stoppingToken.IsCancellationRequested) |
| | | 33 | | { |
| | | 34 | | try |
| | | 35 | | { |
| | | 36 | | using var scope = scopeFactory.CreateScope(); |
| | | 37 | | await ExecutePassAsync(scope.ServiceProvider, stoppingToken); |
| | | 38 | | } |
| | | 39 | | catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested) |
| | | 40 | | { |
| | | 41 | | return; |
| | | 42 | | } |
| | | 43 | | catch (Exception exception) when (exception is not OperationCanceledException) |
| | | 44 | | { |
| | | 45 | | logger.LogWarning(exception, "A User Tasks background pass failed and will be retried"); |
| | | 46 | | } |
| | | 47 | | |
| | | 48 | | try |
| | | 49 | | { |
| | | 50 | | if (!await timer.WaitForNextTickAsync(stoppingToken)) |
| | | 51 | | return; |
| | | 52 | | } |
| | | 53 | | catch (OperationCanceledException) |
| | | 54 | | { |
| | | 55 | | return; |
| | | 56 | | } |
| | | 57 | | } |
| | | 58 | | } |
| | | 59 | | } |
| | | 60 | | |
| | | 61 | | /// <summary>Marks tasks overdue and applies the reserved timeout outcome once a due date elapses.</summary> |
| | | 62 | | public sealed class UserTaskDueWorker(IServiceScopeFactory scopeFactory, IOptions<UserTasksOptions> options, ILogger<Use |
| | 0 | 63 | | : UserTaskPeriodicWorker(scopeFactory, options, logger) |
| | | 64 | | { |
| | 0 | 65 | | protected override TimeSpan Interval => Options.DueSweepInterval; |
| | | 66 | | |
| | | 67 | | protected override async Task ExecutePassAsync(IServiceProvider services, CancellationToken cancellationToken) |
| | | 68 | | { |
| | 0 | 69 | | var dueService = services.GetRequiredService<IUserTaskDueService>(); |
| | 0 | 70 | | foreach (var tenantId in TenantIds) |
| | 0 | 71 | | await dueService.MarkOverdueAsync(tenantId, cancellationToken: cancellationToken); |
| | 0 | 72 | | } |
| | | 73 | | } |
| | | 74 | | |
| | | 75 | | /// <summary>Repairs projections that diverged from committed bookmarks after an interrupted write.</summary> |
| | | 76 | | public sealed class UserTaskReconciliationWorker(IServiceScopeFactory scopeFactory, IOptions<UserTasksOptions> options, |
| | | 77 | | : UserTaskPeriodicWorker(scopeFactory, options, logger) |
| | | 78 | | { |
| | | 79 | | protected override TimeSpan Interval => Options.ReconciliationInterval; |
| | | 80 | | |
| | | 81 | | protected override async Task ExecutePassAsync(IServiceProvider services, CancellationToken cancellationToken) |
| | | 82 | | { |
| | | 83 | | var reconciler = services.GetRequiredService<IUserTaskReconciler>(); |
| | | 84 | | foreach (var tenantId in TenantIds) |
| | | 85 | | await reconciler.ReconcileAsync(new UserTaskReconciliationRequest { TenantId = tenantId }, cancellationToken |
| | | 86 | | } |
| | | 87 | | } |
| | | 88 | | |
| | | 89 | | /// <summary> |
| | | 90 | | /// Drains the encrypted invitation outbox. A failed dispatch is rescheduled with the configured back-off and |
| | | 91 | | /// is abandoned once the schedule is exhausted, so an undeliverable secret always expires rather than |
| | | 92 | | /// lingering indefinitely. |
| | | 93 | | /// </summary> |
| | | 94 | | public sealed class UserTaskInvitationDeliveryWorker(IServiceScopeFactory scopeFactory, IOptions<UserTasksOptions> optio |
| | | 95 | | : UserTaskPeriodicWorker(scopeFactory, options, logger) |
| | | 96 | | { |
| | | 97 | | private readonly ILogger<UserTaskInvitationDeliveryWorker> _logger = logger; |
| | | 98 | | |
| | | 99 | | protected override TimeSpan Interval => TimeSpan.FromSeconds(5); |
| | | 100 | | |
| | | 101 | | protected override async Task ExecutePassAsync(IServiceProvider services, CancellationToken cancellationToken) |
| | | 102 | | { |
| | | 103 | | var outbox = services.GetRequiredService<IUserTaskInvitationOutbox>(); |
| | | 104 | | var dispatcher = services.GetRequiredService<IUserTaskInvitationDispatcher>(); |
| | | 105 | | var clock = services.GetRequiredService<ISystemClock>(); |
| | | 106 | | |
| | | 107 | | foreach (var delivery in await outbox.DequeueDueAsync(50, cancellationToken)) |
| | | 108 | | { |
| | | 109 | | try |
| | | 110 | | { |
| | | 111 | | await dispatcher.DispatchAsync(delivery, cancellationToken); |
| | | 112 | | await outbox.CompleteAsync(delivery.Id, cancellationToken); |
| | | 113 | | } |
| | | 114 | | catch (Exception exception) when (exception is not OperationCanceledException) |
| | | 115 | | { |
| | | 116 | | var delays = Options.InvitationDeliveryRetryDelays; |
| | | 117 | | var delay = delivery.Attempt < delays.Count ? delays[delivery.Attempt] : delays.Count > 0 ? delays[^1] : |
| | | 118 | | // The exception may carry recipient details, so only the invitation ID is logged. |
| | | 119 | | _logger.LogWarning(exception, "Invitation delivery {InvitationId} failed on attempt {Attempt}", delivery |
| | | 120 | | await outbox.RescheduleAsync(delivery.Id, clock.UtcNow.Add(delay), cancellationToken); |
| | | 121 | | } |
| | | 122 | | } |
| | | 123 | | } |
| | | 124 | | } |