You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.2 KiB
53 lines
1.2 KiB
package super_block
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
)
|
|
|
|
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("%03d", 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
|
|
}
|