Hotfix life cycle event hooks couldn't be registered

skygear/registry.py

@@ -123,11 +123,13 @@ def register_hook(self, name, func, *args, **kwargs):
         log.debug("Registered hook '%s' to skygear!", name)
 
     def register_event(self, name, func, *args, **kwargs):
-        if name in self.func_map['event']:
-            log.warning("Replacing previously registered event handler '%s'",
-                        name)
+        event_funcs = self.func_map['event'].get(name)
+        if event_funcs is None:
+            event_funcs = []
+            self.func_map['event'][name] = event_funcs
+
+        event_funcs.append(func)
 
-        self.func_map['event'][name] = func
         self._add_param('event', {
             'name': name
         })

skygear/transmitter/common.py

@@ -109,11 +109,17 @@ def call_func(self, ctx, kind, name, param):
     @_wrap_result
     def call_event_func(self, name, param):
         try:
-            event_func = self._registry.get_func('event', name)
-            return self.event(event_func, param)
-        except KeyError as e:
+            event_funcs = self._registry.get_func('event', name)
+        except KeyError:
             log.warning('Missing event func named "{}"'.format(name))
 
+        results = [self.event(event_func, param) for event_func in event_funcs]
+
+        if name == 'init':
+            return results[0]
+
+        return results
+
     @_wrap_result
     def call_provider(self, ctx, name, action, param):
         obj = self._registry.get_provider(name)