Create & Init Project...

app/service/main/seq-server/dao/seq.go

@@ -0,0 +1,72 @@
+package dao
+
+import (
+	"context"
+	"database/sql"
+	"time"
+
+	"go-common/app/service/main/seq-server/model"
+	"go-common/library/log"
+)
+
+const (
+	_allSQL           = "SELECT id,max_seq,step,token,perch,ctime,mtime FROM business"
+	_maxSeqSQL        = "SELECT max_seq FROM business WHERE id=?"
+	_upMaxSeqSQL      = "UPDATE business SET max_seq=? WHERE id=? AND max_seq=?"
+	_upMaxSeqTokenSQL = "UPDATE business SET max_seq=?,step=? WHERE id=? AND token=?"
+)
+
+// All get all seq
+func (d *Dao) All(c context.Context) (bs map[int64]*model.Business, err error) {
+	rows, err := d.db.Query(c, _allSQL)
+	if err != nil {
+		log.Error("d.db.Query(%s) error(%v)", _allSQL, err)
+		return
+	}
+	bs = make(map[int64]*model.Business)
+	defer rows.Close()
+	for rows.Next() {
+		b := new(model.Business)
+		if err = rows.Scan(&b.ID, &b.MaxSeq, &b.Step, &b.Token, &b.Perch, &b.CTime, &b.MTime); err != nil {
+			log.Error("rows.Scan error(%v)")
+			return
+		}
+		b.BenchTime = b.CTime.Time().UnixNano() / int64(time.Millisecond)
+		b.LastTimestamp = time.Now().UnixNano() / int64(time.Millisecond)
+		bs[b.ID] = b
+	}
+	return
+}
+
+// MaxSeq return current max seq.
+func (d *Dao) MaxSeq(c context.Context, businessID int64) (maxSeq int64, err error) {
+	row := d.db.QueryRow(c, _maxSeqSQL, businessID)
+	if err = row.Scan(&maxSeq); err != nil {
+		if err == sql.ErrNoRows {
+			err = nil
+		} else {
+			log.Error("row.Scan error(%v)", err)
+		}
+	}
+	return
+}
+
+// UpMaxSeq update max seq by businessID.
+func (d *Dao) UpMaxSeq(c context.Context, businessID, maxSeq, lastSeq int64) (rows int64, err error) {
+	res, err := d.db.Exec(c, _upMaxSeqSQL, maxSeq, businessID, lastSeq)
+	if err != nil {
+		log.Error("d.db.Exec(%s, %d, %d) error(%v)", _upMaxSeqSQL, maxSeq, businessID)
+		return
+	}
+	return res.RowsAffected()
+}
+
+// UpMaxSeqToken update max seq by businessID and token.
+func (d *Dao) UpMaxSeqToken(c context.Context, businessID, maxSeq, step int64, token string) (rows int64, err error) {
+	res, err := d.db.Exec(c, _upMaxSeqTokenSQL, maxSeq, step, businessID, token)
+	if err != nil {
+		log.Error("d.db.Exec(%s, %d, %d) error(%v)", _upMaxSeqSQL, maxSeq, businessID)
+		return
+	}
+	return res.RowsAffected()
+}