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model.go
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model.go
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package models
import (
"fmt"
"strings"
"time"
macaron "gopkg.in/macaron.v1"
_ "github.com/go-sql-driver/mysql"
"github.com/go-xorm/core"
"github.com/go-xorm/xorm"
_ "github.com/lib/pq"
"github.com/mayouzi/gocron/internal/modules/app"
"github.com/mayouzi/gocron/internal/modules/logger"
"github.com/mayouzi/gocron/internal/modules/setting"
)
type Status int8
type CommonMap map[string]interface{}
var TablePrefix = ""
var Db *xorm.Engine
const (
Disabled Status = 0 // 禁用
Failure Status = 0 // 失败
Enabled Status = 1 // 启用
Running Status = 1 // 运行中
Finish Status = 2 // 完成
Cancel Status = 3 // 取消
)
const (
Page = 1 // 当前页数
PageSize = 20 // 每页多少条数据
MaxPageSize = 1000 // 每次最多取多少条
)
const DefaultTimeFormat = "2006-01-02 15:04:05"
const (
dbPingInterval = 90 * time.Second
dbMaxLiftTime = 2 * time.Hour
)
type BaseModel struct {
Page int `xorm:"-"`
PageSize int `xorm:"-"`
}
func (model *BaseModel) parsePageAndPageSize(params CommonMap) {
page, ok := params["Page"]
if ok {
model.Page = page.(int)
}
pageSize, ok := params["PageSize"]
if ok {
model.PageSize = pageSize.(int)
}
if model.Page <= 0 {
model.Page = Page
}
if model.PageSize <= 0 {
model.PageSize = MaxPageSize
}
}
func (model *BaseModel) pageLimitOffset() int {
return (model.Page - 1) * model.PageSize
}
// 创建Db
func CreateDb() *xorm.Engine {
dsn := getDbEngineDSN(app.Setting)
engine, err := xorm.NewEngine(app.Setting.Db.Engine, dsn)
if err != nil {
logger.Fatal("创建xorm引擎失败", err)
}
engine.SetMaxIdleConns(app.Setting.Db.MaxIdleConns)
engine.SetMaxOpenConns(app.Setting.Db.MaxOpenConns)
engine.SetConnMaxLifetime(dbMaxLiftTime)
if app.Setting.Db.Prefix != "" {
// 设置表前缀
TablePrefix = app.Setting.Db.Prefix
mapper := core.NewPrefixMapper(core.SnakeMapper{}, app.Setting.Db.Prefix)
engine.SetTableMapper(mapper)
}
// 本地环境开启日志
if macaron.Env == macaron.DEV {
engine.ShowSQL(true)
engine.Logger().SetLevel(core.LOG_DEBUG)
}
go keepDbAlived(engine)
return engine
}
// 创建临时数据库连接
func CreateTmpDb(setting *setting.Setting) (*xorm.Engine, error) {
dsn := getDbEngineDSN(setting)
return xorm.NewEngine(setting.Db.Engine, dsn)
}
// 获取数据库引擎DSN mysql,sqlite,postgres
func getDbEngineDSN(setting *setting.Setting) string {
engine := strings.ToLower(setting.Db.Engine)
dsn := ""
switch engine {
case "mysql":
dsn = fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=%s&allowNativePasswords=true",
setting.Db.User,
setting.Db.Password,
setting.Db.Host,
setting.Db.Port,
setting.Db.Database,
setting.Db.Charset)
case "postgres":
dsn = fmt.Sprintf("user=%s password=%s host=%s port=%d dbname=%s sslmode=disable",
setting.Db.User,
setting.Db.Password,
setting.Db.Host,
setting.Db.Port,
setting.Db.Database)
}
return dsn
}
func keepDbAlived(engine *xorm.Engine) {
t := time.Tick(dbPingInterval)
var err error
for {
<-t
err = engine.Ping()
if err != nil {
logger.Infof("database ping: %s", err)
}
}
}