Reexecution, if request while running

.gitmodules

 [submodule "report"]
 	path = report
 	url = https://git.mount-mockery.de/pylib/report.git
-[submodule "task"]
-	path = task
-	url = https://git.mount-mockery.de/pylib/task.git

exec_command.py

 import json
 import logging
 import mqtt
-import os
 import report
-import task
+import subprocess
 import time
 
 try:
 logger = logging.getLogger(ROOT_LOGGER_NAME).getChild('main')
 
 
-class exec_command(mqtt.mqtt_client, task.threaded_queue):
+class exec_command(mqtt.mqtt_client):
     def __init__(self):
         self.__block_execution__ = False
-        task.threaded_queue.__init__(self)
         mqtt.mqtt_client.__init__(self, config.APP_NAME, config.MQTT_SERVER, 1883, config.MQTT_USER, config.MQTT_PASS)
         self.add_callback(config.TOPIC, self.mqtt_rx)
+        # Start a pseudo process
+        self.process = subprocess.Popen(["sleep", "0"])
 
-    def exec_command(self, rt):
-        os.system(config.COMMAND)
-        self.__block_execution__ = False
-    
+    def exec_command(self):
+        self.process = subprocess.Popen(config.COMMAND.split(" "))
 
     def mqtt_rx(self, client, userdate, message):
-        if not self.__block_execution__:
-            data = None
-            if config.PAYLOAD_KEY is None:
-                try:
-                    data = message.payload.decode('utf-8')
-                except:
-                    logger.exception("Error decoding mqtt message")
-            else:
-                try:
-                    payload = json.loads(message.payload)
-                except:
-                    logger.exception("Error decoding json mqtt message")
-                else:
-                    data = payload.get(config.PAYLOAD_KEY)
-            if config.PAYLOAD_DATA is None or data == config.PAYLOAD_DATA:
-                logger.debug("Starting execution in background...")
-                self.__block_execution__ = True
-                self.enqueue(5, self.exec_command)
+        data = None
+        if config.PAYLOAD_KEY is None:
+            try:
+                data = message.payload.decode('utf-8')
+            except:
+                logger.exception("Error decoding mqtt message")
         else:
-            logger.debug("Execution in progress. Ignoring request...")
+            try:
+                payload = json.loads(message.payload)
+            except:
+                logger.exception("Error decoding json mqtt message")
+            else:
+                data = payload.get(config.PAYLOAD_KEY)
+        if config.PAYLOAD_DATA is None or data == config.PAYLOAD_DATA:
+            if self.process.poll() is None:
+                self.process.kill()
+            logger.debug("Starting execution in background...")
+            self.exec_command()
 
 
 if __name__ == '__main__': 
     report.appLoggingConfigure(config.__BASEPATH__, config.LOGTARGET, ((config.APP_NAME, config.LOGLVL), ), fmt=config.formatter, host=config.LOGHOST, port=config.LOGPORT)
     #
     ec = exec_command()
-    ec.run()
     #
     while True:
         time.sleep(30)

task

-Subproject commit 7583bb5f3bd2420c901374ba95b678af6ce88433