event-scheduling/README.md

Database Based Event Scheduling

Example that demonstrates super basic database based event scheduling.

To run this example;

• Copy .env.example to .env and update postgres database dsn.
• Run go run .

Basically,

• When we want to schedule a job, we add to database

scheduler.Schedule("SendEmail", "mail: nilkantha.dipesh@gmail.com", time.Now().Add(1*time.Minute)) 

• Another go routine is always looking for jobs to execute (that has time expired) in the given interval.

scheduler.CheckEventsInInterval(ctx, time.Minute)

Output looks like;

2021/01/16 11:45:57 💾 Seeding database with table...
2021/01/16 11:45:57 🚀 Scheduling event SendEmail to run at 2021-01-16 11:46:57.177316418 +0545 +0545 m=+60.007979630
2021/01/16 11:45:57 🚀 Scheduling event PayBills to run at 2021-01-16 11:50:57.180342726 +0545 +0545 m=+300.011005907
2021/01/16 11:46:57 ⏰ Ticks Received...
2021/01/16 11:46:57 📨 Sending email with data:  mail: nilkantha.dipesh@gmail.com
2021/01/16 11:47:57 ⏰ Ticks Received...
^C2021/01/16 11:48:00 
❌ Interrupt received closing...