mirror of
https://github.com/crazybber/go-pattern-examples.git
synced 2024-11-23 20:36:02 +03:00
82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
/*
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* @Description: https://github.com/crazybber
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* @Author: Edward
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* @Date: 2020-05-22 12:41:54
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* @Last Modified by: Edward
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* @Last Modified time: 2020-05-22 14:21:00
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*/
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package circuit
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import "time"
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////////////////////////////////
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/// 计数器 用以维护断路器内部的状态
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/// 无论是对象式断路器还是函数式断路器
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/// 都要用到计数器
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////////////////////////////////
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//State 断路器本身的状态的
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//State of switch int
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type State int
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// state for breaker
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const (
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StateClosed State = iota //默认的闭合状态，可以正常执行业务
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StateHalfOpen
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StateOpen
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)
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//OperationState of current 某一次操作的结果状态
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type OperationState int
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//ICounter interface
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type ICounter interface {
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Count(OperationState)
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LastActivity() time.Time
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Reset()
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Total() uint32
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}
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type counters struct {
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Requests uint32 //连续的请求次数
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lastState OperationState
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lastActivity time.Time
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counts uint32 //counts of failures
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TotalFailures uint32
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TotalSuccesses uint32
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ConsecutiveSuccesses uint32
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ConsecutiveFailures uint32
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}
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func (c *counters) Total() uint32 {
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return c.Requests
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}
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func (c *counters) LastActivity() time.Time {
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return c.lastActivity
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}
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func (c *counters) Reset() {
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ct := &counters{}
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ct.lastActivity = c.lastActivity
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ct.lastState = c.lastState
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c = ct
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}
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//Count the failure and success
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func (c *counters) Count(statue OperationState) {
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switch statue {
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case FailureState:
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c.ConsecutiveFailures++
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case SuccessState:
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c.ConsecutiveSuccesses++
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}
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c.Requests++
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c.lastActivity = time.Now() //更新活动时间
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c.lastState = statue
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//handle status change
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}
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