4 from planetstack.config import Config
5 from observer.deleter import Deleter
12 from fofum import Fofum
16 # decorator that marks dispatachable event methods
18 setattr(func, 'event', func.__name__)
22 # This code is currently not in use.
29 for name in dir(EventHandler):
30 attribute = getattr(EventHandler, name)
31 if hasattr(attribute, 'event'):
32 events.append(getattr(attribute, 'event'))
35 def dispatch(self, event, *args, **kwds):
36 if hasattr(self, event):
37 return getattr(self, event)(*args, **kwds)
41 def __init__(self,user=None,clientid=None):
43 user = Config().feefie_client_user
48 clid = Config().feefie_client_id
50 clid = self.random_client_id()
53 self.fofum = Fofum(user=user)
56 def fire(self,**kwargs):
57 kwargs["uuid"] = str(uuid.uuid1())
58 self.fofum.fire(json.dumps(kwargs))
61 def __init__(self,wake_up=None):
62 self.handler = EventHandler()
63 self.wake_up = wake_up
65 self.load_deleter_modules()
67 def load_deleter_modules(self, deleter_dir=None):
68 if deleter_dir is None:
69 if hasattr(Config(), "observer_deleters_dir"):
70 deleter_dir = Config().observer_deleters_dir
72 deleter_dir = "/opt/planetstack/observer/deleters"
74 for fn in os.listdir(deleter_dir):
75 pathname = os.path.join(deleter_dir,fn)
76 if os.path.isfile(pathname) and fn.endswith(".py") and (fn!="__init__.py"):
77 module = imp.load_source(fn[:-3],pathname)
78 for classname in dir(module):
79 c = getattr(module, classname, None)
81 # make sure 'c' is a descendent of Deleter and has a
82 # provides field (this eliminates the abstract base classes
83 # since they don't have a provides)
85 if inspect.isclass(c) and issubclass(c, Deleter) and hasattr(c,"model") and c.model!=None:
87 if not modelName in self.deleters:
88 self.deleters[modelName] = []
89 if not (c in self.deleters[modelName]):
90 self.deleters[modelName].append(c)
91 print 'loaded deleters: %s' % ",".join(self.deleters.keys())
94 def handle_event(self, payload):
95 payload_dict = json.loads(payload)
98 deletion = payload_dict.get('delete_flag', False)
100 model = payload_dict['model']
101 pk = payload_dict['pk']
102 model_dict = payload_dict['model_dict']
104 for deleter in self.deleters[model]:
106 deleter()(pk, model_dict)
108 # something is silently eating these
110 traceback.print_exc()
116 if (not deletion and self.wake_up):
119 def random_client_id(self):
121 return self.client_id
122 except AttributeError:
123 self.client_id = base64.urlsafe_b64encode(os.urandom(12))
124 return self.client_id
127 # This is our unique client id, to be used when firing and receiving events
128 # It needs to be generated once and placed in the config file
131 user = Config().feefie_client_user
136 clid = Config().feefie_client_id
138 clid = self.random_client_id()
142 listener_thread = threading.Thread(target=f.listen_for_event,args=(clid,self.handle_event))
143 listener_thread.start()