예제 #1
0
func updateLocalItem(cache ybc.Cacher, it *ybc.Item, key []byte, casid uint64, flags, validateTtl uint32) {
	size := it.Available()
	defer it.Seek(-int64(size), 2)

	txn := writeItemMetadata(cache, key, size, casid, flags, validateTtl)
	if txn == nil {
		return
	}
	defer txn.Commit()

	n, err := txn.ReadFrom(it)
	if err != nil {
		log.Fatalf("Unexpected error in SetTxn.ReadFrom(size=%d): [%s]", size, err)
	}
	if n != int64(size) {
		log.Fatalf("Unexpected number of bytes copied in SetTxn.ReadFrom(size=%d): %d", size, n)
	}
}
예제 #2
0
func updateLocalItem(cache ybc.Cacher, it *ybc.Item, item *Item, etag uint64, validateTtl uint32) {
	size := it.Available()
	offset := it.Size() - size
	defer it.Seek(int64(offset), 0)

	txn := writeItemMetadata(cache, item.Key, size, it.Ttl(), etag, validateTtl, item.Flags)
	if txn == nil {
		return
	}
	defer txn.Commit()

	n, err := txn.ReadFrom(it)
	if err != nil {
		log.Fatalf("Unexpected error in SetTxn.ReadFrom(size=%d): [%s]", size, err)
	}
	if n != int64(size) {
		log.Fatalf("Unexpected number of bytes copied in SetTxn.ReadFrom(size=%d): %d", size, n)
	}

}
예제 #3
0
파일: server.go 프로젝트: rjmcguire/ybc
func checkAndUpdateCasid(item *ybc.Item, casid *uint64) (isModified, ok bool) {
	casidOld := *casid
	var buf [casidSize]byte
	n, err := item.Read(buf[:])
	if err != nil {
		log.Printf("Cannod read casid from item: [%s]", err)
		return
	}
	if n != len(buf) {
		log.Printf("Unexpected result returned from ybc.Item.Read(): %d. Expected %d", n, len(buf))
		return
	}
	*casid = binary.LittleEndian.Uint64(buf[:])

	if _, err := item.Seek(-casidSize, 1); err != nil {
		log.Fatalf("Unexpected error returned from ybc.Item.Seek(%d, 1): [%s]", -casidSize, err)
	}

	isModified = (casidOld != *casid)
	ok = true
	return
}