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: ://:@:/ 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 }