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
}
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
}