mirror of
https://gitee.com/johng/gf
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44 lines
890 B
Go
44 lines
890 B
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/util/grand"
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)
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const SelectorRandom = "BalancerRandom"
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type selectorRandom struct {
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mu sync.RWMutex
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nodes []Node
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}
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func NewSelectorRandom() Selector {
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return &selectorRandom{
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nodes: make([]Node, 0),
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}
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}
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func (s *selectorRandom) Update(nodes []Node) error {
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s.mu.Lock()
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defer s.mu.Unlock()
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s.nodes = nodes
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return nil
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}
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func (s *selectorRandom) 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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