91 lines
1.9 KiB
Go
91 lines
1.9 KiB
Go
package mysql
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import (
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"errors"
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"time"
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"gorm.io/driver/mysql"
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"gorm.io/gorm"
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"gorm.io/gorm/logger"
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"gorm.io/gorm/schema"
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"gorm.io/plugin/dbresolver"
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)
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var (
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_db *gorm.DB
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_conf *Config
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)
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type Config struct {
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ConnString string
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ConnMaxLifetime int64 //ConnMaxLifetime 最大连接时间，单位：小时
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MaxIdleConns int
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MaxOpenConns int
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InitTable bool
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}
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// Init mysql初始化
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func Init(config *Config) {
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if config == nil {
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config = &Config{
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MaxIdleConns: 10,
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MaxOpenConns: 100,
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}
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}
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if config.ConnString == "" {
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config.ConnString = "root:root@tcp(127.0.0.1:3306)/mysql?charset=utf8&parseTime=True&loc=Local"
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}
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if config.ConnMaxLifetime < 1 {
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config.ConnMaxLifetime = 1
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}
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if config.ConnMaxLifetime > 6 {
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config.ConnMaxLifetime = 6
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}
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if config.MaxIdleConns < 1 {
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config.MaxIdleConns = 1
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}
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if config.MaxIdleConns > 50 {
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config.MaxIdleConns = 50
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}
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if config.MaxOpenConns < 1 {
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config.MaxOpenConns = 1
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}
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if config.MaxOpenConns > 500 {
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config.MaxOpenConns = 500
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}
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_conf = config
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}
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// New 创建实例
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func New() (*gorm.DB, error) {
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if _db != nil {
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return _db, nil
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}
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if _conf == nil {
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return nil, errors.New("组件未初始化,请执行Init!")
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}
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var err error
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_db, err = gorm.Open(mysql.Open(_conf.ConnString), &gorm.Config{
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SkipDefaultTransaction: true,
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Logger: logger.Default.LogMode(logger.Silent),
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NamingStrategy: schema.NamingStrategy{
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SingularTable: true,
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},
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})
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if err != nil {
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return nil, err
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}
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_db.Use(
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dbresolver.Register(dbresolver.Config{
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Sources: []gorm.Dialector{mysql.Open(_conf.ConnString)},
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Replicas: []gorm.Dialector{mysql.Open(_conf.ConnString)},
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Policy: dbresolver.RandomPolicy{},
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}).SetConnMaxIdleTime(time.Hour).
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SetConnMaxLifetime(time.Duration(_conf.ConnMaxLifetime) * time.Hour).
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SetMaxIdleConns(_conf.MaxIdleConns).
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SetMaxOpenConns(_conf.MaxOpenConns))
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return _db, nil
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}
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