onyx harness
Hello!
I wanted to know what is the best practice to start a nestJS app that schedule items to a queue, and then exit right away once done.
Is it through the main.ts ? You await a module/service and then exit when it is done?
Or do you use a package and convert it to a CLI app? like https://github.com/jmcdo29/nest-commander?
silk tusk
I would either use NestFactory.createApplicationContext to avoid any HTTP engine, or just use nest-commander for the CLI app
onyx harness
But imagine this one-off job takes 1h to run, it might need HTTP engine to act as a health probe, right?
Or would you skip health probes in such context?
silk tusk
Are you expecting to make health probe checks against one-off tasks?
onyx harness
Well this one should last few sec, but in the future we might get longer tasks, so I wonder what's the best practice with HTTP frameworks like Nest 🙂
steel cloak
Hey! For long running processes that will benefit from health probe you can require the service from main.ts with app.get({Service}) and start it directly. Then just wait for the promise to resolve. and when that's done you can close the app with await app.close().