Created
January 13, 2022 18:35
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Golang Round Robin - Algorithm
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| package main | |
| import ( | |
| "fmt" | |
| "sync" | |
| "sync/atomic" | |
| ) | |
| func main() { | |
| concurrentCalls := 20 | |
| r := NewRobin("1", "2", "3", "4", "5") | |
| urlCalledChan := make(chan string) | |
| var wg sync.WaitGroup | |
| for i := 0; i < concurrentCalls; i++ { | |
| wg.Add(1) | |
| go func() { | |
| nextUrl := r.Next() | |
| urlCalledChan <- nextUrl | |
| wg.Done() | |
| }() | |
| } | |
| go func() { | |
| for url := range urlCalledChan { | |
| fmt.Println(url) | |
| } | |
| }() | |
| wg.Wait() | |
| } | |
| type robin struct { | |
| next int64 | |
| urls []string | |
| } | |
| func NewRobin(urls ...string) *robin { | |
| return &robin{ | |
| urls: urls, | |
| } | |
| } | |
| func (r *robin) Next() string { | |
| next := atomic.AddInt64(&r.next, int64(1)) | |
| return r.urls[(int(next)-1)%len(r.urls)] | |
| } |
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