43 lines
747 B
Go
43 lines
747 B
Go
package client
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import (
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"strconv"
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"sync/atomic"
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"time"
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)
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var (
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// Global ID generator
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// Default is an autoincrement ID generator
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IdGen IdGenerator
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)
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func init() {
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IdGen = NewAutoIncId()
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}
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// ID generator interface. Users can implament this for
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// their own generator.
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type IdGenerator interface {
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Id() string
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}
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// AutoIncId
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type autoincId struct {
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value int64
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}
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func (ai *autoincId) Id() string {
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next := atomic.AddInt64(&ai.value, 1)
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return strconv.FormatInt(next, 10)
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}
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// NewAutoIncId returns an autoincrement ID generator
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func NewAutoIncId() IdGenerator {
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// we'll consider the nano fraction of a second at startup unique
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// and count up from there.
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return &autoincId{
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value: int64(time.Now().Nanosecond()) << 32,
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}
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}
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