func processGetDeCmd(c *bufio.ReadWriter, cache ybc.Cacher, line []byte, scratchBuf *[]byte) bool {
n := -1
key := nextToken(line, &n, "key")
if key == nil {
return false
}
graceDuration, ok := parseMillisecondsToken(line, &n, "graceDuration")
if !ok {
return false
}
if !expectEof(line, n) {
return false
}
item, err := cache.GetDeAsyncItem(key, graceDuration)
if err != nil {
if err == ybc.ErrWouldBlock {
return writeStr(c.Writer, strWouldBlockCrLf)
}
if err == ybc.ErrCacheMiss {
return writeEndCrLf(c.Writer)
}
log.Fatalf("Unexpected error returned by Cache.GetDeAsyncItem(): [%s]", err)
}
// do not use defer item.Close() for performance reasons
ok = writeGetResponseWithEof(c.Writer, key, item, scratchBuf)
item.Close()
return ok
}
func cGetDeFromCache(cache ybc.Cacher, key []byte, etag *uint64, graceDuration time.Duration) (item *ybc.Item, err error) {
item, err = cache.GetDeAsyncItem(key, graceDuration)
if err == ybc.ErrCacheMiss || err == ybc.ErrWouldBlock {
return
}
if err != nil {
log.Fatalf("Unexpected error returned from Cache.GetItem() for key=[%s]: [%s]", key, err)
}
defer func() {
if err != nil {
item.Close()
}
}()
etagOld := *etag
if err = binaryRead(item, etag, "etag"); err != nil {
return
}
if etagOld == *etag {
item.Close()
item = nil
return
}
return
}
func processCgetDeCmd(c *bufio.ReadWriter, cache ybc.Cacher, line []byte, scratchBuf *[]byte) bool {
n := -1
key := nextToken(line, &n, "key")
if key == nil {
return false
}
casid, ok := parseUint64Token(line, &n, "casid")
if !ok {
return false
}
graceDuration, ok := parseMillisecondsToken(line, &n, "graceDuration")
if !ok {
return false
}
if !expectEof(line, n) {
return false
}
item, err := cache.GetDeAsyncItem(key, graceDuration)
if err == ybc.ErrWouldBlock {
return writeStr(c.Writer, strWouldBlockCrLf)
}
if err == ybc.ErrCacheMiss {
return writeStr(c.Writer, strEndCrLf)
}
if err != nil {
log.Fatalf("Unexpected error returned: [%s]", err)
}
// do not use defer item.Close() for performance reasons
isModified, ok := checkAndUpdateCasid(item, &casid)
if !ok {
item.Close()
return false
}
if !isModified {
item.Close()
return writeStr(c.Writer, strNotModifiedCrLf)
}
ok = writeGetResponseWithEof(c.Writer, key, item, scratchBuf)
item.Close()
return ok
}
