func readEvents(b *testing.B, filename string) <-chan proto.BinlogEvent {
events := make(chan proto.BinlogEvent)
go func() {
defer close(events)
file, err := os.Open(filename)
if err != nil {
b.Fatalf("can't open file %s: %v", filename, err)
}
defer file.Close()
// skip binlog magic header
file.Seek(4, os.SEEK_SET)
for {
// read event header
header := make([]byte, 19)
if _, err := file.Read(header); err != nil {
return
}
// get total event size
size := binary.LittleEndian.Uint32(header[9 : 9+4])
// read the rest of the event
buf := make([]byte, size)
copy(buf[:19], header)
if _, err := file.Read(buf[19:]); err != nil {
return
}
// convert to a BinlogEvent
events <- mysqlctl.NewGoogleBinlogEvent(buf)
}
}()
return events
}
func sendTestEvents(channel chan<- proto.BinlogEvent, events [][]byte) {
for _, buf := range events {
channel <- mysqlctl.NewGoogleBinlogEvent(buf)
}
close(channel)
}