mirror of
https://gitee.com/johng/gf
synced 2026-07-01 11:29:48 +08:00
56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package gsel
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import (
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"context"
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"sync"
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"github.com/gogf/gf/v2/net/gsvc"
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"github.com/gogf/gf/v2/util/grand"
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)
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const SelectorWeight = "BalancerWeight"
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type selectorWeight struct {
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mu sync.RWMutex
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nodes []Node
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}
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func NewSelectorWeight() Selector {
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return &selectorWeight{
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nodes: make([]Node, 0),
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}
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}
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func (s *selectorWeight) Update(nodes []Node) error {
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var newNodes []Node
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for _, v := range nodes {
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node := v
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for i := 0; i < s.getWeight(node); i++ {
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newNodes = append(newNodes, node)
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}
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}
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s.mu.Lock()
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s.nodes = newNodes
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s.mu.Unlock()
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return nil
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}
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func (s *selectorWeight) Pick(ctx context.Context) (node Node, done DoneFunc, err error) {
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s.mu.RLock()
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defer s.mu.RUnlock()
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if len(s.nodes) == 0 {
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return nil, nil, nil
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}
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return s.nodes[grand.Intn(len(s.nodes))], nil, nil
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}
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func (s *selectorWeight) getWeight(node Node) int {
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return node.Service().Metadata.Get(gsvc.MDWeight).Int()
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}
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