util

package

v0.0.0-...-8639602 Latest Latest Go to latest Published: Sep 11, 2022 License: BSL-1.0 Imports: 5 Imported by: 0

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const (
	// 默认虚拟节点
	DefaultVirualSpots = 100
)

This section is empty.

func CaptureErrGo(function func(), callBack PanicErr)

捕获err go 协程,callBack 只有panic的时候才会有

func Sum64(key string) uint64

Sum64 gets the string and returns its uint64 hash value.

type HashRing struct {
	// contains filtered or unexported fields
}

HashRing 结构体

func NewHashRing(spots int) *HashRing

创建一个hashring 建议值虚拟节点数 = 已知总节点数 * 100 如果知道总节点数为6 个，那么虚拟节点数值 = 6 *100 差值最小，分布最均匀,差值在千分之5以内

func (h *HashRing) AddNode(nodeKey string, weight int)

AddNode 添加一个节点， weight 权重

func (h *HashRing) AddNodes(nodeWeight map[string]int)

AddNodes 添加一个节点到换上

func (h *HashRing) GetNode(key string) string

GetNode 根据一个key 获取一个节点主机

func (h *HashRing) RemoveNode(nodeKey string)

RemoveNode 移除一个节点

func (h *HashRing) UpdateNode(nodeKey string, weight int)

UpdateNode 更新一个节点的权重

type PanicErr func(err any)