更新ID生成器

idGenerator/store/segment.go

@@ -0,0 +1,33 @@
+package store
+
+import "fmt"
+
+// 号段
+type Segment struct {
+	start   int64
+	end     int64
+	current int64
+	reback  bool
+}
+
+func (s *Segment) Allot() int64 {
+	s.current++
+	return s.current
+}
+
+func (s *Segment) IsEnding() bool {
+	return (s.current - s.start) > (s.end - s.current)
+}
+
+func (s *Segment) IsEmpty() bool {
+	return s.current == s.end
+}
+
+func (s *Segment) Reback() bool {
+	// println("回旋确认:", s.reback, s.current == (s.start+1))
+	return s.reback && s.current == (s.start+1)
+}
+
+func (s *Segment) String() string {
+	return fmt.Sprintf("start:%d-%d(%v)", s.start, s.end, s.reback)
+}