from __future__ import print_function
import Pyro4

# a Chain member. Passes messages to the next link,
# until the message went full-circle: then it exits.

class Chain(object):
    def __init__(self, name, next):
        self.name=name
        self.nextName=next
        self.next=None
    def process(self,message):
        if self.next is None:
            self.next=Pyro4.core.Proxy("PYRONAME:example.chain."+self.nextName)
        if self.name in message:
            print("Back at %s; we completed the circle!" % self.name)
            return ["complete at "+self.name]
        else:
            print("I'm %s, passing to %s" % (self.name,self.nextName))
            message.append(self.name)
            result=self.next.process(message)
            result.insert(0,"passed on from "+self.name)
            return result