From 056e182f64c73534a58a943d1ebb648532050c69 Mon Sep 17 00:00:00 2001
From: Stefan Allius <stefan.allius@t-online.de>
Date: Tue, 3 Oct 2023 00:46:45 +0200
Subject: [PATCH] implement close() to release cercular references

---
 app/src/messages.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/app/src/messages.py b/app/src/messages.py
index b831ef4..870067a 100644
--- a/app/src/messages.py
+++ b/app/src/messages.py
@@ -100,6 +100,14 @@ class Message(metaclass=IterRegistry):
     '''
     Our puplic methods
     '''
+    def close(self) -> None:
+        logger.debug(f'in Message.close()')
+        # we have refernces to methods of this class in self.switch
+        # so we have to erase self.switch, otherwise this instance can't be 
+        # deallocated by the garbage collector ==> we get a memory leak
+        del self.switch 
+        
+
     def read(self) -> None:
         self._read()