//
// Open returns a new connection to the database.
// The dsn (driver-specific name) is a string in a driver-specific format.
// For ogonori, the dsn should be of the format:
// uname@passw:ip-or-host:port/dbname
// or
// uname@passw:ip-or-host/dbname (default port of 2424 is used)
//
func (d *OgonoriDriver) Open(dsn string) (driver.Conn, error) {
ogl.Debugln("** OgonoriDriver#Open")
uname, passw, host, port, dbname, err := parseDsn(dsn)
clientOpts := obinary.ClientOptions{ServerHost: host, ServerPort: port}
dbc, err := obinary.NewDBClient(clientOpts)
if err != nil {
return nil, err
}
// TODO: right now assumes DocumentDB type - pass in on the dsn??
// NOTE: I tried a graphDB with DocumentDB type and it worked, so why is it necesary at all?
// TODO: this maybe shouldn't happen in this method -> might do it lazily in Query/Exec methods?
err = obinary.OpenDatabase(dbc, dbname, constants.DocumentDB, uname, passw)
if err != nil {
return nil, err
}
return &ogonoriConn{dbc}, nil
}
func ConnectToDocumentDatabase() *obinary.DBClient {
db, _ := NewDB()
obinary.OpenDatabase(db, dbDocumentName, constants.DocumentDB, "admin", "admin")
return db
}
func ConnectToGraphDatabase() *obinary.DBClient {
db, _ := NewDB()
obinary.OpenDatabase(db, dbGraphName, constants.GraphDB, "admin", "admin")
return db
}
func testConcurrentClients() {
var (
dbc1, dbc2, dbc3, dbc4 *obinary.DBClient
err error
)
const nclients = 4
runtime.GOMAXPROCS(nclients)
dbc1, err = obinary.NewDBClient(obinary.ClientOptions{})
Ok(err)
defer dbc1.Close()
dbc2, err = obinary.NewDBClient(obinary.ClientOptions{})
Ok(err)
defer dbc2.Close()
dbc3, err = obinary.NewDBClient(obinary.ClientOptions{})
Ok(err)
defer dbc3.Close()
dbc4, err = obinary.NewDBClient(obinary.ClientOptions{})
Ok(err)
defer dbc4.Close()
err = obinary.OpenDatabase(dbc1, dbDocumentName, constants.DocumentDB, "admin", "admin")
Ok(err)
defer obinary.CloseDatabase(dbc1)
err = obinary.OpenDatabase(dbc2, dbDocumentName, constants.DocumentDB, "admin", "admin")
Ok(err)
defer obinary.CloseDatabase(dbc2)
err = obinary.OpenDatabase(dbc3, dbDocumentName, constants.DocumentDB, "admin", "admin")
Ok(err)
defer obinary.CloseDatabase(dbc3)
err = obinary.OpenDatabase(dbc4, dbDocumentName, constants.DocumentDB, "admin", "admin")
Ok(err)
defer obinary.CloseDatabase(dbc4)
/* ---[ queries and insertions concurrently ]--- */
var wg sync.WaitGroup
wg.Add(nclients)
sql := `select count(*) from Cat where caretaker like 'Eva%'`
docs, err := obinary.SQLQuery(dbc1, sql, "")
Ok(err)
beforeCount := toInt(docs[0].GetField("count").Value)
go doQueriesAndInsertions(&wg, dbc1, 1)
go doQueriesAndInsertions(&wg, dbc2, 2)
go doQueriesAndInsertions(&wg, dbc3, 3)
go doQueriesAndInsertions(&wg, dbc4, 4)
wg.Wait()
sql = `select count(*) from Cat where caretaker like 'Eva%'`
docs, err = obinary.SQLQuery(dbc1, sql, "")
Ok(err)
afterCount := toInt(docs[0].GetField("count").Value)
Equals(beforeCount, afterCount)
fmt.Println(afterCount)
}