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