milvus/internal/indexservice/id.go
cai.zhang f940cc455a Add dockerfile for index
Signed-off-by: cai.zhang <cai.zhang@zilliz.com>
2021-01-26 09:38:40 +08:00

53 lines
1.3 KiB
Go

package indexservice
import (
"github.com/zilliztech/milvus-distributed/internal/kv"
)
type IDAllocator interface {
Alloc(count uint32) (UniqueID, UniqueID, error)
AllocOne() (UniqueID, error)
UpdateID() error
}
// GlobalTSOAllocator is the global single point TSO allocator.
type GlobalIDAllocator struct {
allocator Allocator
}
func NewGlobalIDAllocator(key string, base kv.TxnBase) *GlobalIDAllocator {
return &GlobalIDAllocator{
allocator: NewGlobalTSOAllocator(key, base),
}
}
// Initialize will initialize the created global TSO allocator.
func (gia *GlobalIDAllocator) Initialize() error {
return gia.allocator.Initialize()
}
// GenerateTSO is used to generate a given number of TSOs.
// Make sure you have initialized the TSO allocator before calling.
func (gia *GlobalIDAllocator) Alloc(count uint32) (UniqueID, UniqueID, error) {
timestamp, err := gia.allocator.GenerateTSO(count)
if err != nil {
return 0, 0, err
}
idStart := UniqueID(timestamp)
idEnd := idStart + int64(count)
return idStart, idEnd, nil
}
func (gia *GlobalIDAllocator) AllocOne() (UniqueID, error) {
timestamp, err := gia.allocator.GenerateTSO(1)
if err != nil {
return 0, err
}
idStart := UniqueID(timestamp)
return idStart, nil
}
func (gia *GlobalIDAllocator) UpdateID() error {
return gia.allocator.UpdateTSO()
}