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mysqlpool.go
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mysqlpool.go
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package oo
import (
"database/sql"
"fmt"
"github.com/go-sql-driver/mysql"
"github.com/jmoiron/sqlx"
"time"
)
//Go 的sql.DB本身就已经是连接池了。
type MysqlPool struct {
db *sql.DB
dbx *sqlx.DB
}
var GMysqlPool *MysqlPool
var ErrNoRows error = sql.ErrNoRows
type MysqlCfg struct {
Host string `toml:"host,omitzero"`
Port int64 `toml:"port,omitzero"`
User string `toml:"user,omitzero"`
Pass string `toml:"pass,omitzero"`
}
func IsSqlErr(err error) bool {
return err != nil && err != sql.ErrNoRows
}
func InitMysqlPool(Host string, Port int32, UserName string, Password string, Database string) (p *MysqlPool, e error) {
cfg := MysqlCfg{
Host: Host,
Port: int64(Port),
User: UserName,
Pass: Password,
}
return InitMysqlPool2(&cfg, Database)
}
func InitMysqlPool2(cfg *MysqlCfg, Database string) (p *MysqlPool, e error) {
mysqlCfg := mysql.Config{Net: "tcp", Addr: "127.0.0.1:3306", DBName: "dbname", Collation: "utf8_general_ci", Loc: time.UTC}
Port := cfg.Port
if Port == 0 {
Port = 3306
}
mysqlCfg.Addr = fmt.Sprintf("%s:%d", cfg.Host, Port)
mysqlCfg.User = cfg.User
mysqlCfg.Passwd = cfg.Pass
mysqlCfg.DBName = Database
mysqlCfg.Timeout = 8 * time.Second
mysqlCfg.AllowNativePasswords = true
db, err := sql.Open("mysql", mysqlCfg.FormatDSN())
if err != nil {
return nil, err
}
//G_MysqlDB.SetMaxOpenConns(2000)
//G_MysqlDB.SetMaxIdleConns(1000)
db.Ping()
// GMysqlDB = db
// GMysqlDB.Ping()
dbx := sqlx.NewDb(db, "mysql")
dbx.MapperFunc(LowerCaseWithUnderscores)
pool := &MysqlPool{db, dbx}
if GMysqlPool == nil {
GMysqlPool = pool
}
return pool, nil
}
// func (p *MysqlPool) GetConn() *sql.DB {
// return p.db
// }
func (p *MysqlPool) GetConn() *sqlx.DB {
return p.dbx
}
func (p *MysqlPool) UnGetConn(db interface{}) {
}
func (p *MysqlPool) BeginTx() (tx *sqlx.Tx, err error) {
tx, err = p.dbx.Beginx()
return
}
func (p *MysqlPool) EndTx(tx *sqlx.Tx, perr *error) error {
if perr == nil || *perr == nil {
return tx.Commit()
} else {
return tx.Rollback()
}
}
func (p *MysqlPool) TxExec(tx *sqlx.Tx, sqlstr string, perr *error) (affected uint64, lastid uint64, err error) {
if perr == nil || *perr == nil {
res, err := tx.Exec(sqlstr)
if err != nil {
return 0, 0, err
}
return ExpandSqlResult(res)
}
return 0, 0, *perr
}
func (p *MysqlPool) BatchExec(sqls []string) (err error) {
tx, err := p.dbx.Beginx()
if err != nil {
return
}
for _, s := range sqls {
if _, err = tx.Exec(s); err != nil {
tx.Rollback()
return
}
}
tx.Commit()
return
}
func (p *MysqlPool) Query(sqlstr string) ([]map[string]sql.RawBytes, error) {
db := p.GetConn()
//defer db.Close()
//1、query
rows, err := db.Query(sqlstr)
if err != nil {
return nil, err
}
defer rows.Close()
//2、prepare data space
columns, err := rows.Columns()
if err != nil {
return nil, err
}
//3、processing data
totalRecord := make([]map[string]sql.RawBytes, 0)
for rows.Next() {
values := make([]sql.RawBytes, len(columns))
scanArgus := make([]interface{}, len(values))
for i := range values {
scanArgus[i] = &values[i]
}
err = rows.Scan(scanArgus...)
if err != nil {
break
}
rowRecord := make(map[string]sql.RawBytes)
for i, col := range values {
newcol := sql.RawBytes(make([]byte, len([]byte(col))))
copy([]byte(newcol), []byte(col))
rowRecord[columns[i]] = newcol
}
totalRecord = append(totalRecord, rowRecord)
}
return totalRecord, nil
}
func ExpandSqlResult(res sql.Result) (affected uint64, lastid uint64, err error) {
var af, lid int64
if af, err = res.RowsAffected(); err != nil || af == 0 {
return
}
if lid, err = res.LastInsertId(); err != nil {
return
}
affected = uint64(af)
lastid = uint64(lid)
return
}
func (p *MysqlPool) SingleExec(sqlstr string) (affected uint64, lastid uint64, err error) {
res, err := p.dbx.Exec(sqlstr)
if err != nil {
return
}
return ExpandSqlResult(res)
}
func (p *MysqlPool) SingleSelect(p_struct_rows interface{}, sqlstr string) error {
return p.dbx.Select(p_struct_rows, sqlstr)
}
func (p *MysqlPool) SingleGetRow(p_struct_row interface{}, sqlstr string) error {
return p.dbx.Get(p_struct_row, sqlstr)
}
func (p *MysqlPool) SingleGetVal(p_val interface{}, sqlstr string) error {
return p.dbx.Get(p_val, sqlstr)
}
//for get sum/count/id etc.
func (p *MysqlPool) SingleGetInt64(sqlstr string) (v int64, err error) {
err = p.dbx.Get(&v, sqlstr)
return
}