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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| [ | ||
| { | ||
| "id": "1", | ||
| "timeRollback": "m", | ||
| "numRollback": 1000 | ||
| } | ||
| ] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,57 +1,116 @@ | ||
| package sequence | ||
|
|
||
| // | ||
| //import ( | ||
| // "context" | ||
| // "fmt" | ||
| // clientv3 "go.etcd.io/etcd/client/v3" | ||
| // "strconv" | ||
| //) | ||
| // | ||
| //type Sequence struct { | ||
| // Id string | ||
| // Format string | ||
| // TimeRollback string | ||
| // NumRollback string | ||
| // etcdCli *clientv3.Client | ||
| //} | ||
| // | ||
| //func (s *Sequence) New(etcdCli *clientv3.Client) *Sequence { | ||
| // return &Sequence{ | ||
| // Id: "", | ||
| // Format: "", | ||
| // TimeRollback: "", | ||
| // NumRollback: "", | ||
| // etcdCli: etcdCli, | ||
| // } | ||
| //} | ||
| // | ||
| //func (s *Sequence) Next() string { | ||
| // resp, err := s.etcdCli.Txn(context.TODO()). | ||
| // If(clientv3.Compare(clientv3.Value("counter"), "=", "")). | ||
| // Then(clientv3.OpPut("counter", "1")). | ||
| // Else(clientv3.OpGet("counter")). | ||
| // Commit() | ||
| // | ||
| // if err != nil { | ||
| // fmt.Println("Error:", err) | ||
| // return | ||
| // } | ||
| // | ||
| // if !resp.Succeeded { | ||
| // // Key already exists, increment the value | ||
| // currentValue := resp.Responses[0].GetResponseRange().Kvs[0].Value | ||
| // fmt.Println("Current value:", string(currentValue)) | ||
| // atoi, _ := strconv.Atoi(string(currentValue)) | ||
| // newValue := atoi + 1 | ||
| // | ||
| // // Increment the value | ||
| // _, err := s.etcdCli.Put(context.TODO(), "counter", strconv.Itoa(newValue)) | ||
| // if err != nil { | ||
| // fmt.Println("Error incrementing value:", err) | ||
| // return | ||
| // } | ||
| // fmt.Println("Incremented value:", newValue) | ||
| // } | ||
| // return "" | ||
| //} | ||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/pkg/errors" | ||
| log "github.com/sirupsen/logrus" | ||
| clientv3 "go.etcd.io/etcd/client/v3" | ||
| "strconv" | ||
| "time" | ||
| ) | ||
|
|
||
| type Sequence struct { | ||
| Id string | ||
| TimeRollback string | ||
| NumRollback int64 | ||
| etcdCli *clientv3.Client | ||
| appKey string | ||
| log *log.Logger | ||
| } | ||
|
|
||
| type Config struct { | ||
| Id string `json:"id"` | ||
| TimeRollback string `json:"timeRollback"` | ||
| NumRollback int64 `json:"numRollback"` | ||
| } | ||
|
|
||
| func New(etcdCli *clientv3.Client, appKey string, log *log.Logger, id string, t string, max int64) *Sequence { | ||
| return &Sequence{ | ||
| Id: id, | ||
| TimeRollback: t, | ||
| NumRollback: max, | ||
| etcdCli: etcdCli, | ||
| appKey: appKey, | ||
| log: log, | ||
| } | ||
| } | ||
|
|
||
| func (s *Sequence) Next() (string, error) { | ||
| var put clientv3.Op | ||
| key, sec := s.getKeyAndSec() | ||
| if sec > 0 { | ||
| var lease *clientv3.LeaseGrantResponse | ||
| var err error | ||
| ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second) | ||
| defer cancel() | ||
| lease, err = s.etcdCli.Grant(ctx, int64(sec)) | ||
| if err != nil { | ||
| s.log.Errorf("lease err %s", err.Error()) | ||
| return "", err | ||
| } | ||
| put = clientv3.OpPut(key, "1", clientv3.WithLease(lease.ID)) | ||
| } else { | ||
| put = clientv3.OpPut(key, "1") | ||
| } | ||
|
|
||
| s.log.Infof("key %s, sec %d", key, sec) | ||
| tx, err := s.etcdCli.Txn(context.TODO()).Then(put, clientv3.OpGet(key)).Commit() | ||
| if err != nil { | ||
| s.log.Errorf("事务err,%s", err.Error()) | ||
| return "", err | ||
| } | ||
| if tx.Succeeded { | ||
| if len(tx.Responses) == 2 { | ||
| s.log.Info("事务成功返回结果,", tx.Responses[1].GetResponseRange().Kvs[0].Version) | ||
| s.numRoll(tx.Responses[1].GetResponseRange().Kvs[0].Version, key) | ||
| return strconv.FormatInt(tx.Responses[1].GetResponseRange().Kvs[0].Version, 10), nil | ||
| } | ||
| return "", errors.Errorf("response count err:%d, key:%s", len(tx.Responses), key) | ||
| } | ||
| return "", errors.New("tx err") | ||
| } | ||
|
|
||
| func (s *Sequence) numRoll(version int64, key string) { | ||
| if s.NumRollback == 0 { | ||
| return | ||
| } | ||
| if s.NumRollback <= version { | ||
| _, err := s.etcdCli.Delete(context.TODO(), key) | ||
| if err != nil { | ||
| s.log.Errorf("numRoll del err %s", err.Error()) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (s *Sequence) getKeyAndSec() (string, int) { | ||
| now := time.Now() | ||
| if s.TimeRollback == "" { | ||
| return s.appKey + "/seq/", 0 | ||
| } | ||
| tmp := s.appKey + "/seq/" | ||
| if s.TimeRollback == "m" { | ||
| tmp += fmt.Sprintf("%d%d%d%d%d", now.Year(), now.Month(), now.Day(), now.Hour(), now.Minute()) | ||
| return tmp, 60 - now.Second() | ||
| } | ||
| if s.TimeRollback == "h" { | ||
| tmp += fmt.Sprintf("%d%d%d%d", now.Year(), now.Month(), now.Day(), now.Hour()) | ||
| return tmp, (60-now.Minute())*60 + (60 - now.Second()) | ||
| } | ||
| if s.TimeRollback == "d" { | ||
| tmp += fmt.Sprintf("%d%d%d", now.Year(), now.Month(), now.Day()) | ||
| return tmp, (24-now.Hour())*3600 + (60-now.Minute())*60 + (60 - now.Second()) | ||
| } | ||
| if s.TimeRollback == "M" { | ||
| tmp += fmt.Sprintf("%d%d", now.Year(), now.Month()) | ||
| daysInMonth := now.AddDate(0, 1, -now.Day()).Day() | ||
| return tmp, ((daysInMonth - now.Day()) * 24 * 3600) + (24-now.Hour())*3600 + (60-now.Minute())*60 + (60 - now.Second()) | ||
| } | ||
| if s.TimeRollback == "y" { | ||
| tmp += fmt.Sprintf("%d", now.Year()) | ||
| daysInMonth := now.AddDate(0, 1, -now.Day()).Day() | ||
| lastDayOfYear := time.Date(now.Year(), time.December, 31, 0, 0, 0, 0, time.UTC).YearDay() | ||
| return tmp, ((lastDayOfYear - now.YearDay()) * 24 * 3600) + ((daysInMonth - now.Day()) * 24 * 3600) + (24-now.Hour())*3600 + (60-now.Minute())*60 + (60 - now.Second()) | ||
| } | ||
| return tmp, 0 | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| package sequence | ||
|
|
||
| import ( | ||
| "testing" | ||
| "time" | ||
| ) | ||
|
|
||
| func TestTime(t *testing.T) { | ||
| now := time.Now() | ||
| duration, _ := time.ParseDuration("5m4s") | ||
| t.Log(duration.Minutes()) | ||
|
|
||
| daysInMonth := now.AddDate(0, 1, -now.Day()).Day() | ||
| lastDayOfYear := time.Date(now.Year(), time.December, 31, 0, 0, 0, 0, time.UTC) | ||
| t.Log(daysInMonth) | ||
| t.Log(lastDayOfYear.YearDay()) | ||
| } |