107 lines
2.5 KiB
Go
107 lines
2.5 KiB
Go
package db
|
|
|
|
import (
|
|
"database/sql"
|
|
"errors"
|
|
"fmt"
|
|
"net/url"
|
|
|
|
"github.com/go-gorp/gorp"
|
|
|
|
"github.com/coreos/dex/repo"
|
|
|
|
// Import database drivers
|
|
_ "github.com/lib/pq"
|
|
_ "github.com/mattn/go-sqlite3"
|
|
)
|
|
|
|
type table struct {
|
|
name string
|
|
model interface{}
|
|
autoinc bool
|
|
pkey []string
|
|
|
|
// unique are non-primary key fields which should have uniqueness constraints.
|
|
unique []string
|
|
}
|
|
|
|
var (
|
|
tables []table
|
|
)
|
|
|
|
func register(t table) {
|
|
tables = append(tables, t)
|
|
}
|
|
|
|
type Config struct {
|
|
// Connection string in the format: <driver>://<username>:<password>@<host>:<port>/<database>
|
|
DSN string
|
|
// The maximum number of open connections to the database. The default is 0 (unlimited).
|
|
// For more details see: http://golang.org/pkg/database/sql/#DB.SetMaxOpenConns
|
|
MaxOpenConnections int
|
|
// The maximum number of connections in the idle connection pool. The default is 0 (unlimited).
|
|
// For more details see: http://golang.org/pkg/database/sql/#DB.SetMaxIdleConns
|
|
MaxIdleConnections int
|
|
}
|
|
|
|
func NewConnection(cfg Config) (*gorp.DbMap, error) {
|
|
u, err := url.Parse(cfg.DSN)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("parse DSN: %v", err)
|
|
}
|
|
var (
|
|
db *sql.DB
|
|
dialect gorp.Dialect
|
|
)
|
|
switch u.Scheme {
|
|
case "postgres":
|
|
db, err = sql.Open("postgres", cfg.DSN)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
db.SetMaxIdleConns(cfg.MaxIdleConnections)
|
|
db.SetMaxOpenConns(cfg.MaxOpenConnections)
|
|
dialect = gorp.PostgresDialect{}
|
|
case "sqlite3":
|
|
db, err = sql.Open("sqlite3", u.Host)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// NOTE(ericchiang): sqlite does NOT work with SetMaxIdleConns.
|
|
dialect = gorp.SqliteDialect{}
|
|
default:
|
|
return nil, errors.New("unrecognized database driver")
|
|
}
|
|
|
|
dbm := gorp.DbMap{Db: db, Dialect: dialect}
|
|
|
|
for _, t := range tables {
|
|
tm := dbm.AddTableWithName(t.model, t.name).SetKeys(t.autoinc, t.pkey...)
|
|
for _, unique := range t.unique {
|
|
cm := tm.ColMap(unique)
|
|
if cm == nil {
|
|
return nil, fmt.Errorf("no such column: %q", unique)
|
|
}
|
|
cm.SetUnique(true)
|
|
}
|
|
}
|
|
return &dbm, nil
|
|
}
|
|
|
|
func TransactionFactory(conn *gorp.DbMap) repo.TransactionFactory {
|
|
return func() (repo.Transaction, error) {
|
|
return conn.Begin()
|
|
}
|
|
}
|
|
|
|
// NewMemDB creates a new in memory sqlite3 database.
|
|
func NewMemDB() *gorp.DbMap {
|
|
dbMap, err := NewConnection(Config{DSN: "sqlite3://:memory:"})
|
|
if err != nil {
|
|
panic("Failed to create in memory database: " + err.Error())
|
|
}
|
|
if _, err := MigrateToLatest(dbMap); err != nil {
|
|
panic("In memory database migration failed: " + err.Error())
|
|
}
|
|
return dbMap
|
|
}
|