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package storage
import (
"errors"
"fmt"
)
const (
ReplicaPlacementCount = 9
)
type ReplicaPlacement struct {
SameRackCount int
DiffRackCount int
DiffDataCenterCount int
}
func NewReplicaPlacementFromString(t string) (*ReplicaPlacement, error) {
rp := &ReplicaPlacement{}
for i, c := range t {
count := int(c - '0')
if 0 <= count && count <= 2 {
switch i {
case 0:
rp.DiffDataCenterCount = count
case 1:
rp.DiffRackCount = count
case 2:
rp.SameRackCount = count
}
} else {
return rp, errors.New("Unknown Replication Type:" + t)
}
}
return rp, nil
}
func NewReplicaPlacementFromByte(b byte) (*ReplicaPlacement, error) {
return NewReplicaPlacementFromString(fmt.Sprintf("%d", b))
}
func (rp *ReplicaPlacement) Byte() byte {
ret := rp.DiffDataCenterCount*100 + rp.DiffRackCount*10 + rp.SameRackCount
return byte(ret)
}
func (rp *ReplicaPlacement) String() string {
b := make([]byte, 3)
b[0] = byte(rp.DiffDataCenterCount + '0')
b[1] = byte(rp.DiffRackCount + '0')
b[2] = byte(rp.SameRackCount + '0')
return string(b)
}
func (rp *ReplicaPlacement) GetCopyCount() int {
return rp.DiffDataCenterCount + rp.DiffRackCount + rp.SameRackCount + 1
}
func (rp *ReplicaPlacement) GetReplicationLevelIndex() int {
return rp.DiffDataCenterCount*3 + rp.DiffRackCount*3 + rp.SameRackCount
}
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