8cadd00d34
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48 lines
1.4 KiB
Plaintext
48 lines
1.4 KiB
Plaintext
---
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title: "Besked K\x0f8"
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image: /images/user-guide/emails/emails_header.png
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---
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<Frame>
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<img src="/images/user-guide/emails/emails_header.png" alt="Header" />
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</Frame>
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Køer muliggør asynkrone operationer. De kan bruges til at udf�0F8re baggrundsopgaver, som for eksempel at sende en velkomstmail ved registrering.
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Hver anvendelsestilf�0E6lde vil have sin egen k�0F8klasse, der udvides fra `MessageQueueServiceBase`.
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I �F8jeblikket st�0Ftter vi kun `bull-mq`[bull-mq](https://bullmq.io/) som k�0F�1F er-driver.
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## Trin til at oprette og bruge en ny kø
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1. Tilf�0Fj et k�0F�F8navn til din nye k�0F�F8 under enum `MESSAGE_QUEUES`.
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2. Provide the factory implementation of the queue with the queue name as the dependency token.
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3. Inject the queue that you created in the required module/service with the queue name as the dependency token.
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4. Add worker class with token based injection just like producer.
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### Eksempel p�0E5 anvendelse
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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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