Ejemplo n.º 1
0
func readEntryFrom(r io.Reader, ent *raftpb.Entry) error {
	var l uint64
	if err := binary.Read(r, binary.BigEndian, &l); err != nil {
		return err
	}
	buf := make([]byte, int(l))
	if _, err := io.ReadFull(r, buf); err != nil {
		return err
	}
	return ent.Unmarshal(buf)
}
Ejemplo n.º 2
0
func (er *entryReader) readEntry(ent *raftpb.Entry) error {
	var l uint64
	if err := binary.Read(er.r, binary.BigEndian, &l); err != nil {
		return err
	}
	buf := make([]byte, int(l))
	if _, err := io.ReadFull(er.r, buf); err != nil {
		return err
	}
	er.bytes.AddBy(8 + int64(l))
	return ent.Unmarshal(buf)
}
Ejemplo n.º 3
0
func writeEntryTo(w io.Writer, ent *raftpb.Entry) error {
	size := ent.Size()
	if err := binary.Write(w, binary.BigEndian, uint64(size)); err != nil {
		return err
	}
	b, err := ent.Marshal()
	if err != nil {
		return err
	}
	_, err = w.Write(b)
	return err
}
Ejemplo n.º 4
0
func (ew *entryWriter) writeEntry(ent *raftpb.Entry) error {
	size := ent.Size()
	if err := binary.Write(ew.w, binary.BigEndian, uint64(size)); err != nil {
		return err
	}
	b, err := ent.Marshal()
	if err != nil {
		return err
	}
	_, err = ew.w.Write(b)
	ew.bytes.AddBy(8 + int64(size))
	return err
}
Ejemplo n.º 5
0
func TestSlice(t *testing.T) {
	var i uint64
	offset := uint64(100)
	num := uint64(100)
	last := offset + num
	half := offset + num/2
	halfe := pb.Entry{Index: half, Term: half}

	storage := NewMemoryStorage()
	storage.ApplySnapshot(pb.Snapshot{Metadata: pb.SnapshotMetadata{Index: offset}})
	for i = 1; i < num/2; i++ {
		storage.Append([]pb.Entry{{Index: offset + i, Term: offset + i}})
	}
	l := newLog(storage)
	for i = num / 2; i < num; i++ {
		l.append(pb.Entry{Index: offset + i, Term: offset + i})
	}

	tests := []struct {
		from  uint64
		to    uint64
		limit uint64

		w      []pb.Entry
		wpanic bool
	}{
		// test no limit
		{offset - 1, offset + 1, noLimit, nil, false},
		{offset, offset + 1, noLimit, nil, false},
		{half - 1, half + 1, noLimit, []pb.Entry{{Index: half - 1, Term: half - 1}, {Index: half, Term: half}}, false},
		{half, half + 1, noLimit, []pb.Entry{{Index: half, Term: half}}, false},
		{last - 1, last, noLimit, []pb.Entry{{Index: last - 1, Term: last - 1}}, false},
		{last, last + 1, noLimit, nil, true},

		// test limit
		{half - 1, half + 1, 0, []pb.Entry{{Index: half - 1, Term: half - 1}}, false},
		{half - 1, half + 1, uint64(halfe.Size() + 1), []pb.Entry{{Index: half - 1, Term: half - 1}}, false},
		{half - 1, half + 1, uint64(halfe.Size() * 2), []pb.Entry{{Index: half - 1, Term: half - 1}, {Index: half, Term: half}}, false},
		{half - 1, half + 2, uint64(halfe.Size() * 3), []pb.Entry{{Index: half - 1, Term: half - 1}, {Index: half, Term: half}, {Index: half + 1, Term: half + 1}}, false},
		{half, half + 2, uint64(halfe.Size()), []pb.Entry{{Index: half, Term: half}}, false},
		{half, half + 2, uint64(halfe.Size() * 2), []pb.Entry{{Index: half, Term: half}, {Index: half + 1, Term: half + 1}}, false},
	}

	for j, tt := range tests {
		func() {
			defer func() {
				if r := recover(); r != nil {
					if !tt.wpanic {
						t.Errorf("%d: panic = %v, want %v: %v", j, true, false, r)
					}
				}
			}()
			g, err := l.slice(tt.from, tt.to, tt.limit)
			if tt.from <= offset && err != ErrCompacted {
				t.Fatalf("#%d: err = %v, want %v", j, err, ErrCompacted)
			}
			if tt.from > offset && err != nil {
				t.Fatalf("#%d: unexpected error %v", j, err)
			}
			if !reflect.DeepEqual(g, tt.w) {
				t.Errorf("#%d: from %d to %d = %v, want %v", j, tt.from, tt.to, g, tt.w)
			}
		}()
	}
}