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18observer.go
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18observer.go
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/**
@author: Jason Pang
@desc:
@date: 2021/6/26
**/
package design
import "fmt"
type PurchaseOperFunc func(status string, data string) (res bool, err error)
/**
* @Author: Jason Pang
* @Description: 注册的观察者
*/
var PurchaseOperFuncArr = []PurchaseOperFunc{
create,
isDeleted,
apply,
}
/**
* @Author: Jason Pang
* @Description: 用于创建的观察者
* @param status
* @param data
* @return res
* @return err
*/
func create(status string, data string) (res bool, err error) {
if status == "create" {
fmt.Println("开始创建")
return true, nil
}
return true, nil
}
/**
* @Author: Jason Pang
* @Description: 用于删除的观察者
* @param status
* @param data
* @return res
* @return err
*/
func isDeleted(status string, data string) (res bool, err error) {
if status == "delete" {
fmt.Println("开始删除")
return true, nil
}
return true, nil
}
/**
* @Author: Jason Pang
* @Description: 用于履约的观察者
* @param status
* @param data
* @return res
* @return err
*/
func apply(status string, data string) (res bool, err error) {
if status == "apply" {
fmt.Println("开始履约")
return true, nil
}
return true, nil
}
func observerMain() {
status := "create"
data := "订单数据"
//有状态更新时,通知所有观察者
for _, oper := range PurchaseOperFuncArr {
res, err := oper(status, data)
if err != nil {
fmt.Println("操作失败")
break
}
if res == false {
fmt.Println("处理失败")
break
}
}
}