Move SupervisorMixin to mixins

lib/tfw/components/mixins/__init__.py

@@ -0,0 +1 @@
+from .supervisor_mixin import SupervisorMixin

lib/tfw/components/mixins/supervisor_mixin.py

@@ -0,0 +1,20 @@
+import xmlrpc.client
+from contextlib import suppress
+from xmlrpc.client import Fault as SupervisorFault
+
+from tfw.config import tfwenv
+
+
+class SupervisorMixin:
+    supervisor = xmlrpc.client.ServerProxy(tfwenv.SUPERVISOR_HTTP_URI).supervisor
+
+    def stop_process(self):
+        with suppress(SupervisorFault):
+            self.supervisor.stopProcess(self.process_name)
+
+    def start_process(self):
+        self.supervisor.startProcess(self.process_name)
+
+    def restart_process(self):
+        self.stop_process()
+        self.start_process()