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42 lines
1.4 KiB
Plaintext
42 lines
1.4 KiB
Plaintext
---
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title: File d'attente de messages
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---
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Les files d'attente facilitent les opérations asynchrones. Elles peuvent être utilisées pour effectuer des tâches de fond telles que l'envoi d'un e-mail de bienvenue lors de l'enregistrement.
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Chaque cas d'utilisation aura sa propre classe de file d'attente étendue à partir de `MessageQueueServiceBase`.
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Actuellement, nous ne supportons que `bull-mq`[bull-mq](https://bullmq.io/) comme pilote de file d'attente.
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## Étapes pour créer et utiliser une nouvelle file d'attente
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1. Ajoutez un nom de file d'attente pour votre nouvelle file sous l'énumération `MESSAGE_QUEUES`.
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2. Fournissez l'implémentation de la fabrique de la file d'attente avec le nom de la file comme dépendance.
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3. Injectez la file d'attente que vous avez créée dans le module/service requis en utilisant le nom de la file comme dépendance.
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4. Ajoutez une classe worker avec une injection basée sur des jetons, comme pour le producteur.
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### Exemple d'utilisation
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```ts
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class Resolver {
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constructor(@Inject(MESSAGE_QUEUES.custom) private queue: MessageQueueService) {}
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async onSomeAction() {
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//business logic
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await this.queue.add(someData);
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}
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}
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//async worker
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class CustomWorker {
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constructor(@Inject(MESSAGE_QUEUES.custom) private queue: MessageQueueService) {
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this.initWorker();
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}
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async initWorker() {
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await this.queue.work(async ({ id, data }) => {
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//worker logic
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});
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}
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}
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```
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