[WIP] next try

devices.py

@@ -229,7 +229,6 @@ class FrappyNode(SecNodeDevice, Moveable):
                                 type=str, default='', settable=True),
     }
 
-    _service_manager = FrappyManager()
     _cfgvalue = None
 
     def doStart(self, value):
@@ -251,8 +250,12 @@ class FrappyNode(SecNodeDevice, Moveable):
             return self.secnode.descriptive_data['_frappy_config']
         except (KeyError, AttributeError):
             pass
-        if self._cfgvalue is None and self._cache:
-            self._cfgvalue = self._cache.get(self, 'value')
+        if self._cfgvalue is None:
+            sea_cfg = FrappyManager().cfg_from_sea(config.instrument).get(self.service)
+            if sea_cfg:
+                return sea_cfg
+            if self._cache:
+                self._cfgvalue = self._cache.get(self, 'value')
         return self._cfgvalue
 
     def createDevices(self):
@@ -269,9 +272,7 @@ class FrappyNode(SecNodeDevice, Moveable):
     @classmethod
     def config_dirs(cls, ins, service):
         # TODO: no more needed after allowing ~cfg in FrappyManager.do_start
-        sm = cls._service_manager
-        sm.get_info()
-        return sm.config_dirs(ins, service)
+        return FrappyManager().config_dirs(ins, service)
 
     @classmethod
     def available_cfg(cls, service):
@@ -308,12 +309,13 @@ class FrappyNode(SecNodeDevice, Moveable):
         if cfg is None:
             cfg = self._cfgvalue
         ins = config.instrument
-        info = self._service_manager.get_ins_info(ins)
+        fm = FrappyManager()
+        info = fm.get_ins_info(ins)
         cfginfo = {}
-        self._service_manager.get_procs(cfginfo=cfginfo)
+        fm.get_procs(cfginfo=cfginfo)
         running_cfg = cfginfo.get((ins, self.service), '')
         if not forced:
-            sea_cfg = self._service_manager.cfg_from_sea(ins).get(self.service)
+            sea_cfg = fm.cfg_from_sea(ins).get(self.service)
             if sea_cfg == '?':
                 self.log.warning('undefined sea device')
                 cfg = ''  # stop server
@@ -327,7 +329,7 @@ class FrappyNode(SecNodeDevice, Moveable):
             self.disable()
         if running_cfg:
             self._disconnect()
-            self._service_manager.do_stop(ins, self.service)
+            fm.do_stop(ins, self.service)
         is_cfg = cfg and ':' not in cfg
         if is_cfg:
             available_cfg = self.available_cfg(self.service)
@@ -347,7 +349,7 @@ class FrappyNode(SecNodeDevice, Moveable):
             self.uri = ''  # disconnect
         if uri:
             if is_cfg:
-                self._service_manager.do_start(ins, self.service, cfg, logger=self.log)
+                fm.do_start(ins, self.service, cfg, logger=self.log)
             self.uri = uri  # connect
         self._cfgvalue = cfg
         if self._cache: