forked from go-xorm/xorm
/
xorm.go
113 lines (96 loc) · 3.19 KB
/
xorm.go
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package xorm
import (
"database/sql"
"errors"
"fmt"
"os"
"reflect"
"runtime"
"sync"
"time"
"github.com/go-xorm/core"
)
const (
Version string = "0.4"
)
// !nashtsai! implicit register drivers and dialects is no good, as init() can be called before sql driver got registered
// func init() {
// regDrvsNDialects()
// }
func regDrvsNDialects() bool {
if core.RegisteredDriverSize() == 0 {
providedDrvsNDialects := map[string]struct {
dbType core.DbType
getDriver func() core.Driver
getDialect func() core.Dialect
}{
"odbc": {"mssql", func() core.Driver { return &odbcDriver{} }, func() core.Dialect { return &mssql{} }}, // !nashtsai! TODO change this when supporting MS Access
"mysql": {"mysql", func() core.Driver { return &mysqlDriver{} }, func() core.Dialect { return &mysql{} }},
"mymysql": {"mysql", func() core.Driver { return &mymysqlDriver{} }, func() core.Dialect { return &mysql{} }},
"postgres": {"postgres", func() core.Driver { return &pqDriver{} }, func() core.Dialect { return &postgres{} }},
"sqlite3": {"sqlite3", func() core.Driver { return &sqlite3Driver{} }, func() core.Dialect { return &sqlite3{} }},
"oci8": {"oracle", func() core.Driver { return &oci8Driver{} }, func() core.Dialect { return &oracle{} }},
"goracle": {"oracle", func() core.Driver { return &goracleDriver{} }, func() core.Dialect { return &oracle{} }},
}
for driverName, v := range providedDrvsNDialects {
_, err := sql.Open(driverName, "")
if err == nil {
// fmt.Printf("driver succeed: %v\n", driverName)
core.RegisterDriver(driverName, v.getDriver())
core.RegisterDialect(v.dbType, v.getDialect())
} else {
// fmt.Printf("driver failed: %v | err: %v\n", driverName, err)
}
}
return true
} else {
return false
}
}
func close(engine *Engine) {
engine.Close()
}
// new a db manager according to the parameter. Currently support four
// drivers
func NewEngine(driverName string, dataSourceName string) (*Engine, error) {
regDrvsNDialects()
driver := core.QueryDriver(driverName)
if driver == nil {
return nil, errors.New(fmt.Sprintf("Unsupported driver name: %v", driverName))
}
uri, err := driver.Parse(driverName, dataSourceName)
if err != nil {
return nil, err
}
dialect := core.QueryDialect(uri.DbType)
if dialect == nil {
return nil, errors.New(fmt.Sprintf("Unsupported dialect type: %v", uri.DbType))
}
db, err := core.Open(driverName, dataSourceName)
if err != nil {
return nil, err
}
err = dialect.Init(db, uri, driverName, dataSourceName)
if err != nil {
return nil, err
}
engine := &Engine{
db: db,
dialect: dialect,
Tables: make(map[reflect.Type]*core.Table),
mutex: &sync.RWMutex{},
TagIdentifier: "xorm",
Logger: NewSimpleLogger(os.Stdout),
TZLocation: time.Local,
}
engine.SetMapper(core.NewCacheMapper(new(core.SnakeMapper)))
//engine.Filters = dialect.Filters()
//engine.Cacher = NewLRUCacher()
//err = engine.SetPool(NewSysConnectPool())
runtime.SetFinalizer(engine, close)
return engine, err
}
// clone an engine
func (engine *Engine) Clone() (*Engine, error) {
return NewEngine(engine.dialect.DriverName(), engine.dialect.DataSourceName())
}