def _decode_similarity_destination(self, meta_message, authentication_impl):
if __debug__:
from authentication import Authentication
assert isinstance(meta_message, Message)
assert isinstance(authentication_impl, Authentication.Implementation)
try:
my_similarity, = self._dispersy_database.execute(u"SELECT similarity FROM similarity WHERE community = ? AND user = ? AND cluster = ?",
(self._community.database_id,
self._community._my_member.database_id,
meta_message.destination.cluster)).next()
except StopIteration:
raise DropPacket("We don't know our own similarity... should not happen")
my_similarity = BloomFilter(str(my_similarity), 0)
try:
sender_similarity, = self._dispersy_database.execute(u"SELECT similarity FROM similarity WHERE community = ? AND user = ? AND cluster = ?",
(self._community.database_id,
authentication_impl.member.database_id,
meta_message.destination.cluster)).next()
except StopIteration:
raise DelayPacketBySimilarity(self._community, authentication_impl.member, meta_message.destination)
sender_similarity = BloomFilter(str(sender_similarity), 0)
return meta_message.destination.implement(my_similarity.bic_occurrence(sender_similarity))
