/
mysql.go
153 lines (129 loc) · 3.21 KB
/
mysql.go
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package storage
import (
"context"
"database/sql"
"errors"
"fmt"
"time"
"github.com/cestlascorpion/opossum/utils"
"github.com/jmoiron/sqlx"
log "github.com/sirupsen/logrus"
_ "github.com/go-sql-driver/mysql" // mysql driver
)
type MySQL struct {
*sqlx.DB
query *querySql
cancel context.CancelFunc
}
func NewMySQL(ctx context.Context, conf *utils.Config) (*MySQL, error) {
table := conf.Segment.Table
if len(table) == 0 {
return nil, errors.New(utils.ErrInvalidParameter)
}
query := &querySql{
GetAllTagsSql: fmt.Sprintf(getAllTagsSql, table),
UpdateMaxIdSql: fmt.Sprintf(updateMaxIdSql, table),
GetLeafAllocSql: fmt.Sprintf(getLeafAllocSql, table),
}
db, err := sqlx.Open("mysql", conf.MySQLSourceName())
if err != nil {
log.Errorf("sqlx open err %+v", err)
return nil, err
}
x, cancel := context.WithCancel(ctx)
go func(ctx context.Context) {
ticker := time.NewTicker(time.Minute)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
if err := db.PingContext(ctx); err != nil {
log.Warnf("check ping err %+v", err)
}
}
}
}(x)
return &MySQL{
DB: db,
query: query,
cancel: cancel,
}, nil
}
func (m *MySQL) GetAllTags(ctx context.Context) ([]string, error) {
result := make([]*utils.LeafAlloc, 0)
err := m.SelectContext(ctx, &result, m.query.GetAllTagsSql)
if err != nil {
return nil, err
}
tags := make([]string, 0, len(result))
for i := range result {
tags = append(tags, result[i].BizTag)
}
return tags, nil
}
func (m *MySQL) UpdateMaxIdAndGetLeafAlloc(ctx context.Context, tag string) (*utils.LeafAlloc, error) {
result := &utils.LeafAlloc{}
err := doTx(ctx, m, func(tx *sqlx.Tx) error {
res, err := m.ExecContext(ctx, m.query.UpdateMaxIdSql, tag)
if err != nil {
return err
}
changed, err := res.RowsAffected()
if err != nil {
return err
}
if changed != 1 {
return sql.ErrNoRows
}
err = m.GetContext(ctx, result, m.query.GetLeafAllocSql, tag)
if err != nil {
return err
}
return nil
})
if err != nil {
return nil, err
}
return result, nil
}
func (m *MySQL) Close(ctx context.Context) {
if m.cancel != nil {
m.cancel()
}
_ = m.DB.Close()
}
// ---------------------------------------------------------------------------------------------------------------------
const (
getAllTagsSql = "select biz_tag from leaf_alloc_%s"
updateMaxIdSql = "update leaf_alloc_%s set max_id = max_id + step where biz_tag = ?"
getLeafAllocSql = "select biz_tag, max_id, step from leaf_alloc_%s where biz_tag = ?"
)
type querySql struct {
GetAllTagsSql string
UpdateMaxIdSql string
GetLeafAllocSql string
}
func doTx(ctx context.Context, db *MySQL, fn func(tx *sqlx.Tx) error) (err error) {
tx, err := db.BeginTxx(ctx, nil)
if err != nil {
log.Errorf("db.BeginTxx %+v", err)
return err
}
defer func() {
if p := recover(); p != nil {
_ = tx.Rollback()
log.Errorf("transaction panic + rollback")
panic(p)
} else if err != nil {
log.Errorf("transaction rollback")
_ = tx.Rollback()
} else {
err = tx.Commit()
}
}()
err = fn(tx)
return
}
// ---------------------------------------------------------------------------------------------------------------------