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feat(domain): withdrawal cancels the registratie process via a BPMN message event (refs #12)

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Add an interrupting message boundary event (RegistratieIngetrokken) on the Beoordelen task that

ends the process; the Workflow Client delivers the message to the task's execution, and the

withdraw handler triggers it best-effort after the domain transition (ADR-0014).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Niek Otten
2026-07-16 11:29:56 +02:00
parent 2a6874ef6d
commit edffbb4575
4 changed files with 76 additions and 13 deletions
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26
services/domain/Big.Application/WithdrawRegistration.cs
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@@ -7,13 +7,14 @@ public sealed record WithdrawRegistrationCommand(RegistrationId RegistrationId);
/// <summary>
/// The withdrawal use case (S-11): a zorgprofessional pulls a still-open registration back. It
/// advances the aggregate to INGETROKKEN and persists it. Idempotent — a repeated or redelivered
/// withdrawal of an already-withdrawn registration is a no-op (the aggregate is not persisted again).
/// Cancelling the running Flowable process (so the case leaves the behandelaar's werkbak) is a later
/// sub-slice (S-11b, via a BPMN message event); this sub-slice owns the domain transition only —
/// mirroring how the beoordeling's rejection deferred its zaak propagation.
/// advances the aggregate to INGETROKKEN, persists it, then cancels the running registratie process
/// by delivering the withdrawal message to its open <c>Beoordelen</c> task (ADR-0014), so the case
/// leaves the behandelaar's werkbak. Idempotent — a repeated or redelivered withdrawal of an
/// already-withdrawn registration is a no-op (not persisted or cancelled again). Cancelling is
/// best-effort: if no <c>Beoordelen</c> task is open (the process has not parked there yet, or has
/// already ended) the withdrawal still stands — mirroring <see cref="BeoordeelRegistratie"/>.
/// </summary>
public sealed class WithdrawRegistration(IRegistrationStore store)
public sealed class WithdrawRegistration(IRegistrationStore store, IUserTaskClient tasks)
{
public async Task HandleAsync(WithdrawRegistrationCommand command, CancellationToken ct = default)
{
@@ -22,11 +23,22 @@ public sealed class WithdrawRegistration(IRegistrationStore store)
var registration = await store.GetAsync(command.RegistrationId, ct)
?? throw new InvalidOperationException($"No registration {command.RegistrationId} to withdraw.");
// A repeated withdrawal is a no-op: don't persist the already-withdrawn aggregate again.
// A repeated withdrawal is a no-op: don't persist or cancel the already-withdrawn one again.
if (registration.Status == RegistrationStatus.Ingetrokken)
return;
registration.Withdraw();
await store.SaveAsync(registration, ct);
await CancelWorkflowTaskAsync(command.RegistrationId, ct);
}
// Cancel the workflow: deliver the withdrawal message to the open Beoordelen task's execution so
// the process's boundary event ends it. If none is open the withdrawal still stands.
private async Task CancelWorkflowTaskAsync(RegistrationId registrationId, CancellationToken ct)
{
var open = await tasks.GetOpenBeoordelingenAsync(ct);
var task = open.FirstOrDefault(t => t.RegistrationId == registrationId);
if (task is not null)
await tasks.WithdrawBeoordelingAsync(task.ExecutionId, ct);
}
}