func syncCommand(req *requestContext) error {
args := req.args
if len(args) != 2 {
return ErrCmdParams
}
var logIndex int64
var logPos int64
var err error
logIndex, err = ledis.StrInt64(args[0], nil)
if err != nil {
return ErrCmdParams
}
logPos, err = ledis.StrInt64(args[1], nil)
if err != nil {
return ErrCmdParams
}
req.syncBuf.Reset()
//reserve space to write master info
if _, err := req.syncBuf.Write(reserveInfoSpace); err != nil {
return err
}
m := &ledis.MasterInfo{logIndex, logPos}
if _, err := req.app.ldb.ReadEventsTo(m, &req.syncBuf); err != nil {
return err
} else {
buf := req.syncBuf.Bytes()
binary.BigEndian.PutUint64(buf[0:], uint64(m.LogFileIndex))
binary.BigEndian.PutUint64(buf[8:], uint64(m.LogPos))
if len(req.compressBuf) < snappy.MaxEncodedLen(len(buf)) {
req.compressBuf = make([]byte, snappy.MaxEncodedLen(len(buf)))
}
if buf, err = snappy.Encode(req.compressBuf, buf); err != nil {
return err
}
req.resp.writeBulk(buf)
}
return nil
}
func syncCommand(c *client) error {
args := c.args
if len(args) != 2 {
return ErrCmdParams
}
var logIndex int64
var logPos int64
var err error
logIndex, err = ledis.StrInt64(args[0], nil)
if err != nil {
return ErrCmdParams
}
logPos, err = ledis.StrInt64(args[1], nil)
if err != nil {
return ErrCmdParams
}
c.syncBuf.Reset()
//reserve space to write binlog anchor
if _, err := c.syncBuf.Write(reserveInfoSpace); err != nil {
return err
}
m := &ledis.BinLogAnchor{logIndex, logPos}
if _, err := c.app.ldb.ReadEventsToTimeout(m, &c.syncBuf, 5); err != nil {
return err
} else {
buf := c.syncBuf.Bytes()
binary.BigEndian.PutUint64(buf[0:], uint64(m.LogFileIndex))
binary.BigEndian.PutUint64(buf[8:], uint64(m.LogPos))
if len(c.compressBuf) < snappy.MaxEncodedLen(len(buf)) {
c.compressBuf = make([]byte, snappy.MaxEncodedLen(len(buf)))
}
if buf, err = snappy.Encode(c.compressBuf, buf); err != nil {
return err
}
c.resp.writeBulk(buf)
}
return nil
}