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cluster.go
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cluster.go
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package etcd
import (
"math/rand"
"strings"
)
type Cluster struct {
Leader string `json:"leader"`
Machines []string `json:"machines"`
picked int
}
func NewCluster(machines []string) *Cluster {
// if an empty slice was sent in then just assume HTTP 4001 on localhost
if len(machines) == 0 {
machines = []string{"http://127.0.0.1:4001"}
}
// default leader and machines
return &Cluster{
Leader: "",
Machines: machines,
picked: rand.Intn(len(machines)),
}
}
func (cl *Cluster) failure() { cl.picked = rand.Intn(len(cl.Machines)) }
func (cl *Cluster) pick() string { return cl.Machines[cl.picked] }
func (cl *Cluster) updateFromStr(machines string) {
cl.Machines = strings.Split(machines, ",")
for i := range cl.Machines {
cl.Machines[i] = strings.TrimSpace(cl.Machines[i])
}
cl.picked = rand.Intn(len(cl.Machines))
}