@cardstack/queue NPM | npm.io

0.14.38-patch.0 • Published 4 years ago

Install

Weekly downloads

10

License

MIT

Repository

Last release

4 years ago

Job queuing plugin for Cardstack

This plugin is for queueing jobs with cardstack hub. It uses pg-boss and by extension, postgresql, to manage queued jobs,

Required database configuration

The test suite is configured to talk to a PostgreSQL docker container. You can start it like:

docker run --name cardstack-postgres -d --rm -p 5432:5432 cardstack/pg-test

And stop it like:

docker stop cardstack-postgres

API

Assuming you've looked up the queues feature from DI etc, e.g.

let queue = env.lookup('hub:queues');

You can subscribe to a job by passing in a handler:

queue.subscribe('my-job', handler, options);

Options are passed directly to pg boss.

Handlers can be sync or async:

queue.subscribe('my-job', () => console.log("sync handler") );

queue.subscribe('my-job', () => { return new Promise() } );

queue.subscribe('my-job', async () => { await stuff(); console.log('done') });

You can then publish jobs to the named queues.

To publish without waiting for the job to complete, use the publish method:

  let jobId = await queue.publish('my-job', {someDataForJob: 123}, options);
  // this line executes after the job gets to the db, but before it is executed

To publish and wait for the job to complete, use the publishAndWait method:

  let jobResult = await queue.publishAndWait('my-job', {someDataForJob: 123}, options);
  // this line executes after the job is completed

cardstack-plugin

@cardstack/di @cardstack/logger @cardstack/plugin-utils pg pg-boss

@everything-registry/sub-chunk-156 @cardstack/ethereum @infinitebrahmanuniverse/nolb-_card @zalastax/nolb-_card

0.14.38-patch.0

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