Merge pull request #26 from yesgs/master

添加从ID解析生成时间的方法

Go/source/idgen/DefaultIdGenerator.go

@@ -87,3 +87,7 @@ func NewDefaultIdGenerator(options *IdGeneratorOptions) *DefaultIdGenerator {
 func (dig DefaultIdGenerator) NewLong() int64 {
 	return dig.SnowWorker.NextId()
 }
+
+func (dig DefaultIdGenerator) ExtractTime(id int64) time.Time {
+	return time.UnixMilli(id>>(dig.Options.WorkerIdBitLength+dig.Options.SeqBitLength) + dig.Options.BaseTime)
+}

Go/source/idgen/YitIdHelper.go

@@ -2,6 +2,7 @@ package idgen
 
 import (
 	"sync"
+	"time"
 )
 
 var singletonMutex sync.Mutex
@@ -27,3 +28,7 @@ func NextId() int64 {
 
 	return idGenerator.NewLong()
 }
+
+func ExtractTime(id int64) time.Time {
+	return idGenerator.ExtractTime(id)
+}