class CachedBit(object):
def __init__(self, crid):
self.crid = crid # Cache's corresponding router's id.
self.cpt = cache_hdr()
self.cache = Cache(5000)
self.logfh = None
pass
def ihandler(self, msg):
self.cpt.recv(msg)
cid = self.cpt.get_char_array(self.cpt.id)
src = self.cpt.get_src_addr()
dest = self.cpt.get_dest_addr()
if self.cpt.type == MessageType.REQUEST:
if self.cache.is_hit(cid):
print "HIT"
logme(self.logfh, "%s:%i\t%s:%i\t%s\t%i\t%s" % (src[0],src[1],dest[0],dest[1],"REQ", 1, binascii.hexlify(cid)))
self.type = MessageType.RESPONSE
self.cpt.swap_src_dest()
msg = self.cpt.send() + self.cache.get_val_by_key(cid)
else:
print "MISS"
if not self.cpt.is_cached_bit_set():
self.cpt.set_cached_bit()
self.cpt.set_char_array(self.cpt.cr_id, self.crid)
msg = self.cpt.send() + self.cpt.data
logme(self.logfh, "%s:%i\t%s:%i\t%s\t%i\t%s" % (src[0],src[1],dest[0],dest[1],"REQ", 0, binascii.hexlify(cid)))
elif self.cpt.type == MessageType.RESPONSE:
if not self.cache.is_hit(cid):
if self.cpt.is_cached_bit_set() and self.cpt.get_char_array(self.cpt.cr_id) == self.crid:
print "Caching data", self.cache.current_size(), self.cpt.is_cached_bit_set()
evict = self.cache.add_chunk(cid, self.cpt.data)
logme(self.logfh, "%s:%i\t%s:%i\t%s\t%i\t%s" % (src[0],src[1],dest[0],dest[1],"RSP", 0, binascii.hexlify(cid)))
if evict:
logme(self.logfh, "%s:%i\t%s:%i\t%s\t%i\t%s" % (src[0],src[1],dest[0],dest[1],"DEL", 0, binascii.hexlify(evict)))
logme(self.logfh, "%s:%i\t%s:%i\t%s\t%i\t%s" % (src[0],src[1],dest[0],dest[1],"ADD", 0, binascii.hexlify(cid)))
return msg
