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48 lines
1.0 KiB
Go
48 lines
1.0 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/internal/intlog"
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)
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type selectorRoundRobin struct {
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mu sync.Mutex
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nodes Nodes
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next int
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}
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func NewSelectorRoundRobin() Selector {
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return &selectorRoundRobin{
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nodes: make(Nodes, 0),
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}
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}
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func (s *selectorRoundRobin) Update(ctx context.Context, nodes Nodes) error {
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intlog.Printf(ctx, `Update nodes: %s`, nodes.String())
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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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s.next = 0
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return nil
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}
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func (s *selectorRoundRobin) Pick(ctx context.Context) (node Node, done DoneFunc, err error) {
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s.mu.Lock()
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defer s.mu.Unlock()
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if len(s.nodes) == 0 {
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return
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}
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node = s.nodes[s.next]
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s.next = (s.next + 1) % len(s.nodes)
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intlog.Printf(ctx, `Picked node: %s`, node.Address())
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return
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}
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