added the SIGINT capture.

src/appengine/__init__.py

@@ -8,6 +8,7 @@ import logging
 from systemd import journal
 import inspect
 from enum import Enum, auto
+import signal
 from importlib import import_module
 from threading import Thread, Lock
 
@@ -103,6 +104,12 @@ class Commands(Thread):
     def stop(self):
         self.stopped = True
 
+    def free(self):
+        """ Virtual method used to clean resources for threaded Commands
+        when they are stopped.
+        """
+        pass
+
     def list_modules(self):
         success = True
         ret = "List of modules:\n"
@@ -296,11 +303,21 @@ class CommandsLoader:
             if v.threaded:
                 v.start()
 
+    def stop(self):
+        for k, v in self.cmods.items():
+            if v.threaded:
+                v.stop()
+
     def join(self):
         for k, v in self.cmods.items():
             if v.threaded:
                 v.join()
 
+    def free(self):
+        for k, v in self.cmods.items():
+            if v.threaded:
+                v.free()
+
 
 class AppEngine:
     def __init__(
@@ -310,17 +327,22 @@ class AppEngine:
         log_file: str = "",
         debug: bool = False,
     ) -> None:
+        self.cl = None
         self.app_name = app_name
         self.conf = ConfigParser()
         if conf_file != "":
             self.parse_config(conf_file)
         self.def_log(log_file)
-
+        signal.signal(signal.SIGINT, self.signal_handler)
         if debug:
             self.log.setLevel(logging.DEBUG)
         else:
             self.log.setLevel(logging.WARNING)
 
+    def signal_handler(self, sig, frame):
+        print("\nExiting.")
+        self.stop()
+
     def parse_config(self, cf: str):
         if os.path.exists(cf) and os.path.isfile(cf):
             self.conf.read(cf)
@@ -349,6 +371,10 @@ class AppEngine:
             self.log.addHandler(journal.JournalHandler())
 
     def exec(self, modpath: str = ""):
-        cl = CommandsLoader(self.conf, self.log, modpath)
-        cl.start()
-        cl.join()
+        self.cl = CommandsLoader(self.conf, self.log, modpath)
+        self.cl.start()
+        self.cl.join()
+        self.cl.free()
+
+    def stop(self):
+        self.cl.stop()