56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
// Package dispatch ...
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//
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// Description : Round Robin 轮询选择服务器
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//
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// Author : go_developer@163.com<张德满>
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//
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// Date : 2021-04-01 8:04 下午
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package dispatch
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import (
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"fmt"
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"github.com/go-developer/balance/define"
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"github.com/go-developer/gopkg/easylock"
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)
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// NewRoundRobin 轮询调度
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//
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// Author : go_developer@163.com<张德满>
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//
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// Date : 8:07 下午 2021/4/1
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func NewRoundRobin() IDispatch {
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return &RoundRobin{
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lock: easylock.NewLock(),
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nextNodeIndex: 0,
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}
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}
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// RoundRobin 轮询选择机器
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//
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// Author : go_developer@163.com<张德满>
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//
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// Date : 8:06 下午 2021/4/1
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type RoundRobin struct {
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lock easylock.EasyLock
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nextNodeIndex int
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}
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// Get ...
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//
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// Author : go_developer@163.com<张德满>
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//
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// Date : 8:05 下午 2021/4/1
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func (r *RoundRobin) Get(nodeList []*define.SeverNode) (string, *define.Error) {
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if len(nodeList) == 0 {
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return "", define.NewError(define.ErrorTypeNodeListEmpty, "服务器可用节点为空")
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}
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_ = r.lock.Lock()
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defer func() {
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_ = r.lock.Unlock()
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}()
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node := fmt.Sprintf("%s:%d", nodeList[r.nextNodeIndex].Host, nodeList[r.nextNodeIndex].Port)
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r.nextNodeIndex = (r.nextNodeIndex + 1) % len(nodeList)
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return node, nil
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}
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