120 lines
3.3 KiB
Go
120 lines
3.3 KiB
Go
package common
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import (
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"database/sql"
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"fmt"
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"strings"
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"time"
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_ "github.com/go-sql-driver/mysql"
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"github.com/yedf/dtm/dtmcli"
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// _ "github.com/lib/pq"
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"gorm.io/driver/mysql"
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// "gorm.io/driver/postgres"
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"gorm.io/gorm"
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)
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// ModelBase model base for gorm to provide base fields
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type ModelBase struct {
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ID uint
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CreateTime *time.Time `gorm:"autoCreateTime"`
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UpdateTime *time.Time `gorm:"autoUpdateTime"`
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}
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func getGormDialator(driver string, dsn string) gorm.Dialector {
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if driver == "mysql" {
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return mysql.Open(dsn)
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// } else if driver == "postgres" {
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// return postgres.Open(dsn)
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}
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panic(fmt.Errorf("unkown driver: %s", driver))
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}
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var dbs = map[string]*DB{}
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// DB provide more func over gorm.DB
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type DB struct {
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*gorm.DB
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}
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// Must set must flag, panic when error occur
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func (m *DB) Must() *DB {
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db := m.InstanceSet("ivy.must", true)
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return &DB{DB: db}
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}
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// NoMust unset must flag, don't panic when error occur
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func (m *DB) NoMust() *DB {
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db := m.InstanceSet("ivy.must", false)
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return &DB{DB: db}
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}
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// ToSQLDB get the sql.DB
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func (m *DB) ToSQLDB() *sql.DB {
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d, err := m.DB.DB()
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dtmcli.E2P(err)
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return d
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}
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type tracePlugin struct{}
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func (op *tracePlugin) Name() string {
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return "tracePlugin"
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}
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func (op *tracePlugin) Initialize(db *gorm.DB) (err error) {
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before := func(db *gorm.DB) {
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db.InstanceSet("ivy.startTime", time.Now())
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}
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after := func(db *gorm.DB) {
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_ts, _ := db.InstanceGet("ivy.startTime")
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sql := db.Dialector.Explain(db.Statement.SQL.String(), db.Statement.Vars...)
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dtmcli.Logf("used: %d ms affected: %d sql is: %s", time.Since(_ts.(time.Time)).Milliseconds(), db.RowsAffected, sql)
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if v, ok := db.InstanceGet("ivy.must"); ok && v.(bool) {
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if db.Error != nil && db.Error != gorm.ErrRecordNotFound {
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panic(db.Error)
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}
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}
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}
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beforeName := "cb_before"
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afterName := "cb_after"
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dtmcli.Logf("installing db plugin: %s", op.Name())
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// 开始前
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_ = db.Callback().Create().Before("gorm:before_create").Register(beforeName, before)
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_ = db.Callback().Query().Before("gorm:query").Register(beforeName, before)
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_ = db.Callback().Delete().Before("gorm:before_delete").Register(beforeName, before)
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_ = db.Callback().Update().Before("gorm:setup_reflect_value").Register(beforeName, before)
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_ = db.Callback().Row().Before("gorm:row").Register(beforeName, before)
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_ = db.Callback().Raw().Before("gorm:raw").Register(beforeName, before)
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// 结束后
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_ = db.Callback().Create().After("gorm:after_create").Register(afterName, after)
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_ = db.Callback().Query().After("gorm:after_query").Register(afterName, after)
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_ = db.Callback().Delete().After("gorm:after_delete").Register(afterName, after)
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_ = db.Callback().Update().After("gorm:after_update").Register(afterName, after)
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_ = db.Callback().Row().After("gorm:row").Register(afterName, after)
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_ = db.Callback().Raw().After("gorm:raw").Register(afterName, after)
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return
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}
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// DbGet get db connection for specified conf
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func DbGet(conf map[string]string) *DB {
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dsn := dtmcli.GetDsn(conf)
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if dbs[dsn] == nil {
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dtmcli.Logf("connecting %s", strings.Replace(dsn, conf["password"], "****", 1))
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db1, err := gorm.Open(getGormDialator(conf["driver"], dsn), &gorm.Config{
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SkipDefaultTransaction: true,
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})
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dtmcli.E2P(err)
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db1.Use(&tracePlugin{})
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dbs[dsn] = &DB{DB: db1}
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}
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return dbs[dsn]
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}
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