mirror of
https://github.com/crazybber/go-pattern-examples.git
synced 2024-11-26 13:46:03 +03:00
81 lines
1.6 KiB
Go
81 lines
1.6 KiB
Go
/*
|
|
* @Description: https://github.com/crazybber
|
|
* @Author: Edward
|
|
* @Date: 2020-05-22 12:41:54
|
|
* @Last Modified by: Edward
|
|
* @Last Modified time: 2020-05-22 16:47:37
|
|
*/
|
|
|
|
package circuit
|
|
|
|
import "time"
|
|
|
|
////////////////////////////////
|
|
/// 计数器 用以维护断路器内部的状态
|
|
/// 无论是对象式断路器还是函数式断路器
|
|
/// 都要用到计数器
|
|
////////////////////////////////
|
|
|
|
//State 断路器本身的状态的
|
|
//State of switch int
|
|
type State int
|
|
|
|
// state for breaker
|
|
const (
|
|
StateClosed State = iota //默认的闭合状态，可以正常执行业务
|
|
StateHalfOpen
|
|
StateOpen
|
|
)
|
|
|
|
//OperationState of current 某一次操作的结果状态
|
|
type OperationState int
|
|
|
|
//ICounter interface
|
|
type ICounter interface {
|
|
Count(OperationState)
|
|
LastActivity() time.Time
|
|
Reset()
|
|
Total() uint32
|
|
}
|
|
|
|
type counters struct {
|
|
Requests uint32 //连续的请求次数
|
|
lastState OperationState
|
|
lastActivity time.Time
|
|
TotalFailures uint32
|
|
TotalSuccesses uint32
|
|
ConsecutiveSuccesses uint32
|
|
ConsecutiveFailures uint32
|
|
}
|
|
|
|
func (c *counters) Total() uint32 {
|
|
return c.Requests
|
|
}
|
|
|
|
func (c *counters) LastActivity() time.Time {
|
|
return c.lastActivity
|
|
}
|
|
|
|
func (c *counters) Reset() {
|
|
ct := &counters{}
|
|
ct.lastActivity = c.lastActivity
|
|
ct.lastState = c.lastState
|
|
c = ct
|
|
}
|
|
|
|
//Count the failure and success
|
|
func (c *counters) Count(statue OperationState) {
|
|
|
|
switch statue {
|
|
case FailureState:
|
|
c.ConsecutiveFailures++
|
|
case SuccessState:
|
|
c.ConsecutiveSuccesses++
|
|
}
|
|
c.Requests++
|
|
c.lastActivity = time.Now() //更新活动时间
|
|
c.lastState = statue
|
|
//handle status change
|
|
|
|
}
|