feat 初次提交

db/mysql/client.go

@@ -0,0 +1,85 @@
+package mysql
+
+import (
+	"common/config"
+	"common/log"
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+	"time"
+)
+
+type DBName string
+
+var dbs = make(map[DBName]*gorm.DB)
+
+func Init(cfg map[string]*config.MySQLConfig) error {
+	for name, oneConfig := range cfg {
+		if db, err := initOneDB(oneConfig); err != nil {
+			return err
+		} else {
+			dbs[DBName(name)] = db
+		}
+	}
+	return nil
+}
+
+func initOneDB(cfg *config.MySQLConfig) (*gorm.DB, error) {
+	db, err := gorm.Open(
+		mysql.Open(cfg.Dsn),
+		&gorm.Config{
+			TranslateError: true,
+			Logger:         logger.Default.LogMode(parseLogLevel(cfg.LogLevel)),
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	sqlDB, err := db.DB()
+	if err != nil {
+		return nil, err
+	}
+	sqlDB.SetMaxOpenConns(int(cfg.MaxOpenConn))
+	sqlDB.SetMaxIdleConns(int(cfg.MaxIdleConn))
+	sqlDB.SetConnMaxLifetime(time.Duration(cfg.ConnMaxLifetimeSec) * time.Second)
+	sqlDB.SetConnMaxIdleTime(time.Duration(cfg.ConnMaxIdleTimeSec) * time.Second)
+
+	return db, nil
+}
+
+func parseLogLevel(logLevel string) logger.LogLevel {
+	switch logLevel {
+	case "silent":
+		return logger.Silent
+	case "error":
+		return logger.Error
+	case "warn":
+		return logger.Warn
+	case "info":
+		return logger.Info
+	}
+	return logger.Info
+}
+
+func GetDB(dbName DBName) *gorm.DB {
+	if q, ok := dbs[dbName]; ok {
+		return q
+	}
+	log.Errorf("db %s not found", dbName)
+	return nil
+}
+
+func Close() error {
+	if dbs == nil {
+		return nil
+	}
+	for name, db := range dbs {
+		if sqlDB, _ := db.DB(); sqlDB != nil {
+			if err := sqlDB.Close(); err != nil {
+				log.Errorf("close db %s error: %v", name, err)
+			}
+		}
+	}
+	return nil
+}