134 lines
2.6 KiB
Go
134 lines
2.6 KiB
Go
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package themis
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import (
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"bytes"
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"encoding/binary"
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"io"
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"github.com/juju/errors"
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"github.com/pingcap/go-hbase"
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"github.com/pingcap/go-hbase/iohelper"
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)
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var (
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_ Lock = (*themisPrimaryLock)(nil)
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_ Lock = (*themisSecondaryLock)(nil)
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)
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type themisLock struct {
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// lock coordinate, table, row, cf, q
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coordinate *hbase.ColumnCoordinate
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// lock type: put/delete/minimal(lock only)
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typ hbase.Type
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// prewrite ts
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ts uint64
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// not used, for alignment
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wallTs uint64
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// not used, for alignment
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clientAddr string
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expired bool
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}
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func (l *themisLock) Timestamp() uint64 {
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return l.ts
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}
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func (l *themisLock) IsExpired() bool {
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return l.expired
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}
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func (l *themisLock) SetExpired(b bool) {
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l.expired = b
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}
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func (l *themisLock) SetCoordinate(c *hbase.ColumnCoordinate) {
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l.coordinate = c
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}
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func (l *themisLock) Coordinate() *hbase.ColumnCoordinate {
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return l.coordinate
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}
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func (l *themisLock) Context() interface{} {
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return nil
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}
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func (l *themisLock) Type() hbase.Type {
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return l.typ
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}
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func (l *themisLock) write(w io.Writer) {
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binary.Write(w, binary.BigEndian, byte(l.typ))
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binary.Write(w, binary.BigEndian, int64(l.ts))
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// write client addr
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iohelper.WriteVarBytes(w, []byte(l.clientAddr))
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binary.Write(w, binary.BigEndian, int64(l.wallTs))
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}
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func (l *themisLock) parse(r iohelper.ByteMultiReader) error {
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// read type
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var typ uint8
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err := binary.Read(r, binary.BigEndian, &typ)
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if err != nil {
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return errors.Trace(err)
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}
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l.typ = hbase.Type(typ)
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// read ts
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var ts int64
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err = binary.Read(r, binary.BigEndian, &ts)
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if err != nil {
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return errors.Trace(err)
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}
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l.ts = uint64(ts)
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// read client addr
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sz, err := binary.ReadUvarint(r)
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if err != nil {
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return errors.Trace(err)
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}
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addr := make([]byte, sz)
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r.Read(addr)
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l.clientAddr = string(addr)
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// read wall time
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var wallTs int64
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err = binary.Read(r, binary.BigEndian, &wallTs)
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if err != nil {
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return errors.Trace(err)
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}
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l.wallTs = uint64(wallTs)
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return nil
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}
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func parseLockFromBytes(b []byte) (Lock, error) {
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buf := bytes.NewBuffer(b)
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var isPrimary uint8
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err := binary.Read(buf, binary.BigEndian, &isPrimary)
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if err != nil {
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return nil, errors.Trace(err)
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}
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var ret Lock
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if isPrimary == 1 {
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l := newThemisPrimaryLock()
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err = l.parse(buf)
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ret = l
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} else {
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l := newThemisSecondaryLock()
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err = l.parse(buf)
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ret = l
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}
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if err != nil {
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return nil, errors.Trace(err)
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}
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return ret, nil
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}
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func isLockResult(r *hbase.ResultRow) bool {
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return len(r.SortedColumns) > 0 && isLockColumn(r.SortedColumns[0].Column)
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}
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func isLockColumn(c hbase.Column) bool {
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return bytes.Compare(c.Family, LockFamilyName) == 0
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}
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