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Everything seem to work now

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This commit is contained in:
Gregory Eremin
2018-11-11 14:24:45 +01:00
parent 9cd1d12583
commit 69353f61bc
9 changed files with 167 additions and 50 deletions
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reader/reader.go
+27 -27
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@@ -17,10 +17,12 @@ type Reader struct {
// Event ...
type Event struct {
Format binlog.FormatDescription
Header binlog.EventHeader
Body []byte
Table *binlog.TableDescription
Rows *binlog.RowsEvent
Buffer []byte
// Table is not empty for rows events
Table *binlog.TableDescription
}
// NewReader ...
@@ -47,10 +49,10 @@ func NewReader(conn *SlaveConn) (*Reader, error) {
func (r *Reader) ReadEvent() (*Event, error) {
connBuff, err := r.conn.ReadPacket()
if err != nil {
return nil, err
return nil, errors.Annotate(err, "read next event")
}
var evt Event
evt := Event{Format: r.format}
if err := evt.Header.Decode(connBuff, r.format); err != nil {
return nil, errors.Annotate(err, "decode event header")
}
@@ -59,34 +61,36 @@ func (r *Reader) ReadEvent() (*Event, error) {
r.state.Offset = uint64(evt.Header.NextOffset)
}
evt.Body = connBuff[r.format.HeaderLen():]
evt.Buffer = connBuff[r.format.HeaderLen():]
csa := r.format.ServerDetails.ChecksumAlgorithm
if evt.Header.Type != binlog.EventTypeFormatDescription && csa == binlog.ChecksumAlgorithmCRC32 {
evt.Body = evt.Body[:len(evt.Body)-4]
// Remove trailing CRC32 checksum, we're not going to verify it
evt.Buffer = evt.Buffer[:len(evt.Buffer)-4]
}
// pretty.Println(h)
switch evt.Header.Type {
case binlog.EventTypeFormatDescription:
var fde binlog.FormatDescriptionEvent
if err = fde.Decode(evt.Body); err == nil {
r.format = fde.FormatDescription
err = fde.Decode(evt.Buffer)
if err != nil {
return nil, errors.Annotate(err, "decode format description event")
}
// pretty.Println(evt.Header.Type.String(), r.format)
r.format = fde.FormatDescription
evt.Format = fde.FormatDescription
case binlog.EventTypeRotate:
var re binlog.RotateEvent
if err = re.Decode(evt.Body, r.format); err == nil {
r.state = re.NextFile
err = re.Decode(evt.Buffer, r.format)
if err != nil {
return nil, errors.Annotate(err, "decode rotate event")
}
// pretty.Println(evt.Header.Type.String(), r.state)
r.state = re.NextFile
case binlog.EventTypeTableMap:
var tme binlog.TableMapEvent
if err = tme.Decode(evt.Body, r.format); err == nil {
r.tableMap[tme.TableID] = tme.TableDescription
err = tme.Decode(evt.Buffer, r.format)
if err != nil {
return nil, errors.Annotate(err, "decode table map event")
}
// pretty.Println(evt.Header.Type.String(), tm)
r.tableMap[tme.TableID] = tme.TableDescription
case binlog.EventTypeWriteRowsV0,
binlog.EventTypeWriteRowsV1,
binlog.EventTypeWriteRowsV2,
@@ -98,22 +102,18 @@ func (r *Reader) ReadEvent() (*Event, error) {
binlog.EventTypeDeleteRowsV2:
re := binlog.RowsEvent{Type: evt.Header.Type}
tableID := re.PeekTableID(evt.Body, r.format)
tableID := re.PeekTableID(evt.Buffer, r.format)
td, ok := r.tableMap[tableID]
if !ok {
return nil, errors.New("Unknown table ID")
}
if err = re.Decode(evt.Body, r.format, td); err != nil {
return nil, err
}
evt.Table = &td
evt.Rows = &re
case binlog.EventTypeQuery:
// Can be decoded by the receiver
case binlog.EventTypeXID:
// TODO: Add support
// Can be decoded by the receiver
case binlog.EventTypeGTID:
// TODO: Add support
case binlog.EventTypeQuery:
// TODO: Handle schema changes
}
return &evt, err