https://github.com/changsongl/gevent

Observer pattern package in Golang.
https://github.com/changsongl/gevent

design-patterns go observer observer-pattern

Last synced: 2 months ago
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Observer pattern package in Golang.

• Host: GitHub
• URL: https://github.com/changsongl/gevent
• Owner: changsongl
• License: mit
• Created: 2022-03-17T02:02:43.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2023-05-09T02:25:24.000Z (about 2 years ago)
• Last Synced: 2024-12-18T08:39:31.847Z (5 months ago)
• Topics: design-patterns, go, observer, observer-pattern
• Language: Go
• Homepage:
• Size: 6.84 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# gevent

GEvent is a golang package for observer pattern. 

The Observer pattern addresses the following problems:

- A one-to-many dependency between objects should be defined without making the objects tightly coupled.

- It should be ensured that when one object changes state, an open-ended number of dependent objects are updated automatically.

- It should be possible that one object can notify an open-ended number of other objects.

### Example:

```` go

// init.go

type test struct {

    data int

}

type testLog struct {

}

func (t testLog) Error(msg string) {

    myProgramLog.Error(msg)

}

var ge GEvent

func init() {

    ge = NewGEvent(NewLogOption(&testLog{}))

}

// account.go

func Register() {

    // some logic for register

	

    a := test{1}

    b := &test{2}

    ge.TriggerEvent("account-create", a, b)

}

// point.go

func init() {

    ge.AddObserver("account-create", "point", func(a test, b *test) {

       // do something for points

    }, true)

}

// user.go

func init() {

    ge.AddObserver("account-create", "user", func(a test, b *test) {

       // do something for user

    }, true)

}

````