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))
60 def random_client_id(self):
63 except AttributeError:
64 self.client_id = base64.urlsafe_b64encode(os.urandom(12))
68 def __init__(self,wake_up=None):
69 self.handler = EventHandler()
70 self.wake_up = wake_up
72 self.load_deleter_modules()
74 def load_deleter_modules(self, deleter_dir=None):
75 if deleter_dir is None:
76 if hasattr(Config(), "observer_deleters_dir"):
77 deleter_dir = Config().observer_deleters_dir
79 deleter_dir = "/opt/planetstack/observer/deleters"
81 for fn in os.listdir(deleter_dir):
82 pathname = os.path.join(deleter_dir,fn)
83 if os.path.isfile(pathname) and fn.endswith(".py") and (fn!="__init__.py"):
84 module = imp.load_source(fn[:-3],pathname)
85 for classname in dir(module):
86 c = getattr(module, classname, None)
88 # make sure 'c' is a descendent of Deleter and has a
89 # provides field (this eliminates the abstract base classes
90 # since they don't have a provides)
92 if inspect.isclass(c) and issubclass(c, Deleter) and hasattr(c,"model") and c.model!=None:
94 if not modelName in self.deleters:
95 self.deleters[modelName] = []
96 if not (c in self.deleters[modelName]):
97 self.deleters[modelName].append(c)
98 print 'loaded deleters: %s' % ",".join(self.deleters.keys())
101 def handle_event(self, payload):
102 payload_dict = json.loads(payload)
105 deletion = payload_dict.get('delete_flag', False)
107 model = payload_dict['model']
108 pk = payload_dict['pk']
109 model_dict = payload_dict['model_dict']
111 for deleter in self.deleters[model]:
113 deleter()(pk, model_dict)
115 # something is silently eating these
117 traceback.print_exc()
123 if (not deletion and self.wake_up):
126 def random_client_id(self):
128 return self.client_id
129 except AttributeError:
130 self.client_id = base64.urlsafe_b64encode(os.urandom(12))
131 return self.client_id
134 # This is our unique client id, to be used when firing and receiving events
135 # It needs to be generated once and placed in the config file
138 user = Config().feefie_client_user
143 clid = Config().feefie_client_id
145 clid = self.random_client_id()
149 listener_thread = threading.Thread(target=f.listen_for_event,args=(clid,self.handle_event))
150 listener_thread.start()