Ejemplo n.º 1
0
func (m *masterInfo) Pos() mysql.Position {
	var pos mysql.Position
	m.l.Lock()
	pos.Name = m.Name
	pos.Pos = m.Position
	m.l.Unlock()

	return pos
}
Ejemplo n.º 2
0
func (c *Canal) startSyncBinlog() error {
	pos := mysql.Position{c.master.Name, c.master.Position}
	log.Infof("Start sync'ing binlog from %v", pos)
	s, err := c.syncer.StartSync(pos)
	if err != nil {
		return errors.Errorf("Failed starting sync at %v: %v", pos, err)
	}

	originalTimeout := time.Second
	timeout := originalTimeout
	forceSavePos := false
	for {
		ev, err := s.GetEventTimeout(timeout)
		if err != nil && err != replication.ErrGetEventTimeout {
			return errors.Trace(err)
		} else if err == replication.ErrGetEventTimeout {
			if timeout == 2*originalTimeout {
				log.Debugf("Flushing event handlers since sync has gone idle")
				if err := c.flushEventHandlers(); err != nil {
					log.Warnf("Error occurred during flush: %v", err)
				}
			}
			timeout = 2 * timeout
			continue
		}

		timeout = time.Second

		//next binlog pos
		pos.Pos = ev.Header.LogPos

		forceSavePos = false

		log.Debugf("Syncing %v", ev)
		switch e := ev.Event.(type) {
		case *replication.RotateEvent:
			c.flushEventHandlers()
			pos.Name = string(e.NextLogName)
			pos.Pos = uint32(e.Position)
			// r.ev <- pos
			forceSavePos = true
			log.Infof("Rotate binlog to %v", pos)
		case *replication.RowsEvent:
			// we only focus row based event
			if err = c.handleRowsEvent(ev); err != nil {
				log.Errorf("Error handling rows event: %v", err)
				return errors.Trace(err)
			}
		case *replication.QueryEvent:
			if err = c.handleQueryEvent(ev); err != nil {
				log.Errorf("Error handling rows event: %v", err)
				return errors.Trace(err)
			}
		default:
			log.Debugf("Ignored event: %+v", e)
		}
		c.master.Update(pos.Name, pos.Pos)
		c.master.Save(forceSavePos)
	}

	return nil
}