mirror of
https://gitee.com/johng/gf.git
synced 2024-12-02 04:07:47 +08:00
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
|
|
//
|
|
// This Source Code Form is subject to the terms of the MIT License.
|
|
// If a copy of the MIT was not distributed with this file,
|
|
// You can obtain one at https://github.com/gogf/gf.
|
|
|
|
package gsel
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
|
|
"github.com/gogf/gf/v2/internal/intlog"
|
|
"github.com/gogf/gf/v2/net/gsvc"
|
|
"github.com/gogf/gf/v2/util/grand"
|
|
)
|
|
|
|
type selectorWeight struct {
|
|
mu sync.RWMutex
|
|
nodes Nodes
|
|
}
|
|
|
|
func NewSelectorWeight() Selector {
|
|
return &selectorWeight{
|
|
nodes: make(Nodes, 0),
|
|
}
|
|
}
|
|
|
|
func (s *selectorWeight) Update(ctx context.Context, nodes Nodes) error {
|
|
intlog.Printf(ctx, `Update nodes: %s`, nodes.String())
|
|
var newNodes []Node
|
|
for _, v := range nodes {
|
|
node := v
|
|
for i := 0; i < s.getWeight(node); i++ {
|
|
newNodes = append(newNodes, node)
|
|
}
|
|
}
|
|
s.mu.Lock()
|
|
s.nodes = newNodes
|
|
s.mu.Unlock()
|
|
return nil
|
|
}
|
|
|
|
func (s *selectorWeight) Pick(ctx context.Context) (node Node, done DoneFunc, err error) {
|
|
s.mu.RLock()
|
|
defer s.mu.RUnlock()
|
|
if len(s.nodes) == 0 {
|
|
return nil, nil, nil
|
|
}
|
|
node = s.nodes[grand.Intn(len(s.nodes))]
|
|
intlog.Printf(ctx, `Picked node: %s`, node.Address())
|
|
return node, nil, nil
|
|
}
|
|
|
|
func (s *selectorWeight) getWeight(node Node) int {
|
|
return node.Service().GetMetadata().Get(gsvc.MDWeight).Int()
|
|
}
|