// Helper method for conn pools to convert errors
func getOrPanic(pool *dbconnpool.ConnectionPool) dbconnpool.PoolConnection {
conn, err := pool.Get()
if err == nil {
return conn
}
if err == dbconnpool.CONN_POOL_CLOSED_ERR {
panic(connPoolClosedErr)
}
panic(NewTabletErrorSql(FATAL, err))
}
func (rqc *RequestContext) getConn(pool *dbconnpool.ConnectionPool) dbconnpool.PoolConnection {
start := time.Now()
timeout, err := rqc.deadline.Timeout()
if err != nil {
panic(NewTabletError(FAIL, "getConn: %v", err))
}
conn, err := pool.Get(timeout)
switch err {
case nil:
rqc.logStats.WaitingForConnection += time.Now().Sub(start)
return conn
case dbconnpool.CONN_POOL_CLOSED_ERR:
panic(connPoolClosedErr)
}
panic(NewTabletErrorSql(FATAL, err))
}
// getPoolReconnect gets a connection from a pool, tests it, and reconnects if
// it gets errno 2006.
func getPoolReconnect(ctx context.Context, pool *dbconnpool.ConnectionPool) (dbconnpool.PoolConnection, error) {
conn, err := pool.Get(ctx)
if err != nil {
return conn, err
}
// Run a test query to see if this connection is still good.
if _, err := conn.ExecuteFetch("SELECT 1", 1, false); err != nil {
// If we get "MySQL server has gone away (errno 2006)", try to reconnect.
if sqlErr, ok := err.(*sqldb.SQLError); ok && sqlErr.Number() == 2006 {
if err := conn.Reconnect(); err != nil {
conn.Recycle()
return conn, err
}
}
}
return conn, nil
}