def on_receive(self, message):
self.logger.debug("Got message: %s" % (message,))
assert "headers" in message
assert len(message["headers"]) > 0
assert "ttl" in message["headers"][-1]
# it should be properly wrapped, so check ttl.
# some defaults here?
last_ttl = message["headers"][-1]["ttl"]
if last_ttl < 1:
self.logger.warning("TTL Drop: message loop")
return
# walk through our registered interests and see if anyone
# wants it.
for ref, asts in self.interests.iteritems():
sent_message = False
if self.config.get("hairpin", False) is False:
# we want to not consider same ref
inmod = message["headers"][-1]["source"]
if ref == self.name_to_ref.get(inmod, None):
continue
if ref == self.name_to_ref.get("%s-reverse" % inmod, None):
continue
for ast in asts:
if ast.eval_node(message) is True:
# we don't want to send the same message twice to
# the same plugin.
if sent_message is False:
ref.tell(message)
sent_message = True
def _eval(self, node, expression, ns=None):
ast = reactor.ast.FilterBuilder(reactor.ast.FilterTokenizer(),
input_expression=expression,
ns=ns)
return ast.eval_node(node)
