https://github.com/obgnail/observer

简单的可定制obsevrer
https://github.com/obgnail/observer

golang observer

Last synced: 9 days ago
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简单的可定制obsevrer

• Host: GitHub
• URL: https://github.com/obgnail/observer
• Owner: obgnail
• Created: 2021-09-06T04:03:10.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2021-09-06T04:04:30.000Z (over 3 years ago)
• Last Synced: 2024-11-07T02:12:53.099Z (about 2 months ago)
• Topics: golang, observer
• Language: Go
• Homepage:
• Size: 3.91 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
## Use example

```go

// Custom observer0

type OperationObserver struct{}

// implement Emit() function

func (ob *OperationObserver) Emit(e *event.Event) (err error) {

	switch e.Action {

	case event.ActionAdd:

		fmt.Println("action observer receive add action", e)

	case event.ActionUpdate:

		fmt.Println("action observer receive update action", e)

	case event.ActionDelete:

		fmt.Println("action observer receive delete action", e)

	}

	return nil

}

// Custom observer1

type TypeObserver struct{}

func (ob *TypeObserver) Emit(e *event.Event) (err error) {

	fmt.Println("type observer receive event:", e)

	return nil

}

func main() {

	eng := engine.Default()  // no delay

	// eng := engine.NewTickerEngine(5 * time.Second) // events in five seconds will be delayed

	eng.AddObserver(&TypeObserver{})

	eng.AddObserver(&OperationObserver{})

	ev0 := event.Default()

	ev1 := event.NewDeleteEvent("myType1", nil)  // Custom event

	ev2 := event.NewEvent("myType3", "myAction", nil)

	eng.PutEvent(ev0, ev1)              // no delay

	eng.PutDelayEvent(time.Second, ev2) // ev3 will push queue after one second delay

	// dummy sleep

	time.Sleep(10 * time.Second)

}

```