https://github.com/sipt/jelly

弹性channel池
https://github.com/sipt/jelly

Last synced: 6 days ago
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弹性channel池

• Host: GitHub
• URL: https://github.com/sipt/jelly
• Owner: sipt
• License: apache-2.0
• Created: 2018-06-28T07:22:09.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2018-06-29T05:21:28.000Z (almost 8 years ago)
• Last Synced: 2025-01-10T21:21:26.335Z (over 1 year ago)
• Language: Go
• Homepage:
• Size: 62.5 KB
• Stars: 1
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# jelly

弹性channel池，用来接收数据并处理，当数据超出负载设置时扩容，当数据量减少时收缩。

![channel pool](./static/channel_pool.png)

- LoadFactor：负载系数，默认为3(容量右移位数，也可以理解为当前缓存数据到达缓存容量的87.5%时，为满载)

- Selector：用于选择哪条channel来发送数据

- Recv：后台不停调用，接收到值后调用处理函数`callback(v interface{})`

- grow()：当`容量<<负载系数 > 剩余空间`时，增加`option.Step`个channel来减轻当前channel的负载

- shrink()：当收缩`option.Step`个channel后还不会达到满载时，就直接收

**Example:**

```go

func main() {

    var w sync.WaitGroup

	pool, err := NewChanPool(DefaultOption, func(v interface{}) {

        //todo 处理v

        fmt.Println(v)

		w.Done()

	})

	if err != nil {

        panic(err)

	}

	err = pool.StartRecv()

	if err != nil {

		panic(err)

	}

    w.Add(1000)

	for i := 0; i < 5; i++ {

		go func() {

			for i := 0; i < 200; i++ {

                pool.Send(i, true) // Send(值，是否允许阻塞)

			}

		}()

	}

	go func() {

		timer := time.NewTimer(5 * time.Second)

		<-timer.C

		t.Fatal("time out")

	}()

	w.Wait() //等待结束

}

```