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mysql.go
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mysql.go
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// Copyright 2023 The CubeFS Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
package mysql
import (
"fmt"
"time"
"github.com/gin-gonic/gin"
"gorm.io/driver/mysql"
"gorm.io/gorm"
"gorm.io/plugin/dbresolver"
"github.com/cubefs/cubefs-dashboard/backend/config"
"github.com/cubefs/cubefs-dashboard/backend/helper/enums"
)
var _db *gorm.DB
type DB struct {
Error error
DB *gorm.DB
RowsAffected int64
}
func Init() error {
username := config.Conf.Mysql.User
password := config.Conf.Mysql.Password
host := config.Conf.Mysql.Host
port := config.Conf.Mysql.Port
database := config.Conf.Mysql.Database
slaveHost := config.Conf.Mysql.SlaveHost
slavePort := config.Conf.Mysql.SlavePort
dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8mb4&parseTime=True&loc=Local", username, password, host, port, database)
slaveDsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8mb4&parseTime=True&loc=Local", username, password, slaveHost, slavePort, database)
conn, err := gorm.Open(mysql.Open(dsn), &gorm.Config{
NowFunc: func() time.Time {
return time.Now().Local()
},
CreateBatchSize: 800,
DisableForeignKeyConstraintWhenMigrating: true,
})
if err != nil {
panic("connect mysql error: " + err.Error())
return err
}
err = conn.Use(dbresolver.Register(dbresolver.Config{
Sources: []gorm.Dialector{mysql.Open(dsn)},
Replicas: []gorm.Dialector{mysql.Open(slaveDsn)},
Policy: dbresolver.RandomPolicy{},
}))
sqlDB, err := conn.DB()
if err != nil {
panic("connect mysql error: " + err.Error())
}
sqlDB.SetMaxIdleConns(config.Conf.Mysql.MaxIdleConn)
sqlDB.SetMaxOpenConns(config.Conf.Mysql.MaxOpenConn)
if enums.GetGinMode(config.Conf.Server.Mode) == gin.DebugMode {
_db = conn.Debug()
} else {
_db = conn
}
return nil
}
func GetDB() *gorm.DB {
return _db
}
func Paginate(limit, page int) func(db *gorm.DB) *gorm.DB {
return func(db *gorm.DB) *gorm.DB {
if page <= 0 {
page = 1
}
if limit <= 0 {
limit = 10
}
offset := (page - 1) * limit
return db.Limit(limit).Offset(offset)
}
}