https://github.com/dipeshdulal/event-scheduling

Golang Event Scheduling Sample Using Postgresql Database as persisting layer.
https://github.com/dipeshdulal/event-scheduling

event-scheduler go postgresql

Last synced: 23 days ago
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Golang Event Scheduling Sample Using Postgresql Database as persisting layer.

• Host: GitHub
• URL: https://github.com/dipeshdulal/event-scheduling
• Owner: dipeshdulal
• Created: 2021-01-16T04:08:38.000Z (almost 4 years ago)
• Default Branch: master
• Last Pushed: 2021-01-25T03:42:53.000Z (almost 4 years ago)
• Last Synced: 2024-10-02T09:11:39.547Z (about 1 month ago)
• Topics: event-scheduler, go, postgresql
• Language: Go
• Homepage:
• Size: 31.3 KB
• Stars: 53
• Watchers: 5
• Forks: 12
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
### 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 

```go

scheduler.Schedule("SendEmail", "mail: [email protected]", time.Now().Add(1*time.Minute)) 

```

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

```go

scheduler.CheckEventsInInterval(ctx, time.Minute)

```

**Output looks like;**

```

2021/01/16 11:58:49 💾 Seeding database with table...

2021/01/16 11:58:49 🚀 Scheduling event SendEmail to run at 2021-01-16 11:59:49.344904505 +0545 +0545 m=+60.004623549

2021/01/16 11:58:49 🚀 Scheduling event PayBills to run at 2021-01-16 12:00:49.34773798 +0545 +0545 m=+120.007457039

2021/01/16 11:59:49 ⏰ Ticks Received...

2021/01/16 11:59:49 📨 Sending email with data:  mail: [email protected]

2021/01/16 12:00:49 ⏰ Ticks Received...

2021/01/16 12:01:49 ⏰ Ticks Received...

2021/01/16 12:01:49 💲 Pay me a bill:  paybills: $4,000 bill

2021/01/16 12:02:49 ⏰ Ticks Received...

2021/01/16 12:03:49 ⏰ Ticks Received...

^C2021/01/16 12:03:57 

❌ Interrupt received closing...

```