func BenchmarkXxhash64CgoMultiWrites(b *testing.B) {
h := C.New64()
for i := 0; i < b.N; i++ {
h.Write(in)
}
_ = h.Sum64()
}
func TestHash64Cgo(t *testing.T) {
h := C.New64()
h.Write(in)
r := h.Sum64()
if r != expected64 {
t.Errorf("expected 0x%x, got 0x%x.", expected64, r)
}
}
//MarshalJSON takes a roshiquery and creates a list of base64 encoded bytes, hashing the StreamID with xxhash
func (q RoshiQuery) MarshalJSON() ([]byte, error) {
ids := make([][]byte, len(q.Streams))
for i := 0; i < len(q.Streams); i++ {
h := xxhash.New64()
io.Copy(h, strings.NewReader(q.Streams[i]))
ids[i] = h.Sum(nil)
}
return json.Marshal(ids)
}
func BenchmarkXX64CgoMultiWrites(b *testing.B) {
var bv uint64
h := CGO.New64()
for i := 0; i < b.N; i++ {
h.Write(in)
bv += h.Sum64()
h.Reset()
}
}
func BenchmarkXxhash64CgoMultiWrites(b *testing.B) {
var bv uint64
h := C.New64()
for i := 0; i < b.N; i++ {
h.Write(in)
bv = h.Sum64()
h.Reset()
}
benchVal64 = bv
}
//MarshalJSON converts from a RoshiStreamItem to the expected json for Roshi, hashing the StreamID with xxhash
func (item RoshiStreamItem) MarshalJSON() ([]byte, error) {
member, _ := MemberJSON(item)
h := xxhash.New64()
io.Copy(h, strings.NewReader(item.StreamID))
return json.Marshal(&roshiItem{
Key: []byte(h.Sum(nil)),
Score: float64(item.Timestamp.UnixNano()),
Member: []byte(member),
})
}
// ###### *Implementation*
func Create(file *os.File, filename string, config common.Config) (common.WriteAheadLog, error) {
// try to open index file, return error on fail
idxFile, err := os.OpenFile(filename+".idx", os.O_CREATE|os.O_APPEND|os.O_RDWR, 0600)
if err != nil {
return nil, err
}
// hash
hash := xxhash.New64()
io.Copy(hash, idxFile)
idxFile.Seek(0, 0)
index, err := VersionOneIndexFactory(idxFile, config.Version, config.Flags, config.TimeToLive)
if err != nil {
file.Close()
return nil, err
}
// Stat the file to get the size. If unsuccessful, close the file and return the error.
stat, err := file.Stat()
if err != nil {
file.Close()
return nil, err
}
// create log writer
writer, err := m3.NewMemMapAppender(file, 512*1024, stat.Size())
if err != nil {
return nil, err
}
logRecordEncoder, err := NewLogRecordEncoder(64*1024, writer)
if err != nil {
return nil, err
}
return &wal{
filename: filename,
logWriter: writer,
index: index,
logRecordEncoder: logRecordEncoder,
indexRecordEncoder: NewIndexRecordEncoder(index),
hashWriter: NewIndexRecordEncoder(hash),
hash: hash,
lastWriteTime: 0,
flags: config.Flags,
logSize: stat.Size(),
}, nil
}
