func doTap(b Bucket, req *gomemcached.MCRequest, r io.Reader,
chpkt chan<- transmissible, cherr <-chan error) *gomemcached.MCResponse {
tc, err := req.ParseTapCommands()
if err != nil {
return &gomemcached.MCResponse{
Status: gomemcached.EINVAL,
Body: []byte(fmt.Sprintf("ParseTapCommands err: %v", err)),
}
}
// TODO: TAP of a vbucket list.
res, yesDump := tapFlagBool(&tc, gomemcached.DUMP)
if res != nil {
return res
}
if yesDump || tapFlagExists(&tc, gomemcached.BACKFILL) {
res := doTapBackFill(b, req, r, chpkt, cherr, tc)
if res != nil {
return res
}
if yesDump {
close(chpkt)
return &gomemcached.MCResponse{Fatal: true}
}
}
// TODO: There's probably a mutation gap between backfill and tap-forward.
return doTapForward(b, req, r, chpkt, cherr, tc)
}
