#!/usr/bin/env python

import arvados
import arvados.events
import json

# 'ev' is a dict containing the log table record describing the change.
def on_message(ev):
    if ('event_type' in ev and
        ev['event_type'] == 'create' and
        ev["object_kind"] == "arvados#collection"):
        print "A new collection was created %s" % ev['object_uuid']

api = arvados.api('v1', cache=False)
ws = arvados.events.subscribe(api, [], on_message)
ws.run_forever()