seaweedfs/go/topology/volume_location_list.go

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package topology
import (
"fmt"
)
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type VolumeLocationList struct {
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list []*DataNode
}
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func NewVolumeLocationList() *VolumeLocationList {
return &VolumeLocationList{}
}
func (dnll *VolumeLocationList) String() string {
return fmt.Sprintf("%v", dnll.list)
}
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func (dnll *VolumeLocationList) Head() *DataNode {
//mark first node as master volume
return dnll.list[0]
}
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func (dnll *VolumeLocationList) Length() int {
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return len(dnll.list)
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}
func (dnll *VolumeLocationList) Set(loc *DataNode) {
for i := 0; i < len(dnll.list); i++ {
if loc.Ip == dnll.list[i].Ip && loc.Port == dnll.list[i].Port {
dnll.list[i] = loc
return
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}
}
dnll.list = append(dnll.list, loc)
}
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func (dnll *VolumeLocationList) Remove(loc *DataNode) bool {
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for i, dnl := range dnll.list {
if loc.Ip == dnl.Ip && loc.Port == dnl.Port {
dnll.list = append(dnll.list[:i], dnll.list[i+1:]...)
return true
}
}
return false
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}
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func (dnll *VolumeLocationList) Refresh(freshThreshHold int64) {
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var changed bool
for _, dnl := range dnll.list {
if dnl.LastSeen < freshThreshHold {
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changed = true
break
}
}
if changed {
var l []*DataNode
for _, dnl := range dnll.list {
if dnl.LastSeen >= freshThreshHold {
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l = append(l, dnl)
}
}
dnll.list = l
}
}