Defined a unique `stop_timeout` (default=5) for RunnablePlugin

platypush/plugins/__init__.py

@@ -13,6 +13,8 @@ from platypush.event import EventGenerator
 from platypush.message.response import Response
 from platypush.utils import get_decorators, get_plugin_name_by_class, set_thread_name
 
+stop_timeout = 5  # Plugin stop timeout in seconds
+
 
 def action(f):
     @wraps(f)
@@ -68,14 +70,23 @@ class RunnablePlugin(Plugin):
     Class for runnable plugins - i.e. plugins that have a start/stop method and can be started.
     """
 
-    def __init__(self, poll_interval: Optional[float] = None, **kwargs):
+    def __init__(
+        self,
+        poll_interval: Optional[float] = None,
+        stop_timeout: Optional[float] = stop_timeout,
+        **kwargs,
+    ):
         """
-        :param poll_interval: How often the :meth:`.loop` function should be execute (default: None, no pause/interval).
+        :param poll_interval: How often the :meth:`.loop` function should be
+            execute (default: None, no pause/interval).
+        :param stop_timeout: How long we should wait for any running
+            threads/processes to stop before exiting (default: 5 seconds).
         """
         super().__init__(**kwargs)
         self.poll_interval = poll_interval
         self.bus: Optional[Bus] = None
         self._should_stop = threading.Event()
+        self._stop_timeout = stop_timeout
         self._thread: Optional[threading.Thread] = None
 
     def main(self):
@@ -98,7 +109,16 @@ class RunnablePlugin(Plugin):
             self.logger.info(f'Waiting for {self.__class__.__name__} to stop')
             try:
                 if self._thread:
-                    self._thread.join()
+                    self._thread.join(timeout=self._stop_timeout)
+                    if self._thread.is_alive():
+                        self.logger.warning(
+                            f'Timeout (seconds={self._stop_timeout}) on '
+                            'exit for the plugin '
+                            + (
+                                get_plugin_name_by_class(self.__class__)
+                                or self.__class__.__name__
+                            )
+                        )
             except Exception as e:
                 self.logger.warning(f'Could not join thread on stop: {e}')
 
@@ -124,10 +144,9 @@ class AsyncRunnablePlugin(RunnablePlugin, ABC):
     Class for runnable plugins with an asynchronous event loop attached.
     """
 
-    def __init__(self, *args, _stop_timeout: Optional[float] = 30.0, **kwargs):
+    def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
-        self._stop_timeout = _stop_timeout
         self._loop: Optional[asyncio.AbstractEventLoop] = None
         self._loop_runner: Optional[threading.Thread] = None
         self._task: Optional[asyncio.Task] = None