X-Git-Url: https://git.ralfj.de/saartuer.git/blobdiff_plain/a89547dadb2928083b7bd859f99cca9c8c61f74b..5a866fd8add83733d9e1cde55ecbd23f69661658:/libtuer.py

diff --git a/libtuer.py b/libtuer.py
index 0df4051..e31ce27 100644
--- a/libtuer.py
+++ b/libtuer.py
@@ -1,4 +1,4 @@
-import logging, logging.handlers, syslog, os
+import logging, logging.handlers, os, time, queue, threading, subprocess, multiprocessing
 
 # logging function
 class Logger:
@@ -9,16 +9,35 @@ class Logger:
 		self.logger.setLevel(logging.INFO)
 		self.handler = logging.handlers.SysLogHandler(address = '/dev/log', facility = logging.handlers.SysLogHandler.LOG_LOCAL0)
 		self.logger.addHandler(self.handler)
-	def log (self, what):
+	
+	def log (self, lvl, what):
 		thestr = "%s[%d]: %s" % (self.name,os.getpid(),what)
 		print (thestr)
-		self.logger.info(thestr)
+		self.logger.log(lvl, thestr)
+	
+	def debug(self, what):
+		self.log(logging.DEBUG, what)
+	def info(self, what):
+		self.log(logging.INFO, what)
+	def warning(self, what):
+		self.log(logging.WARNING, what)
+	def error(self, what):
+		self.log(logging.ERROR, what)
+	def critical(self, what):
+		self.log(logging.CRITICAL, what)
 
 logger = Logger()
 
-def log (what):
-	logger.log(what)
- 
+# run a command asynchronously and log the return value if not 0
+# prefix must be a string identifying the code position where the call came from
+def fire_and_forget (cmd, log, prefix):
+	def _fire_and_forget (cmd, log, prefix):
+		with open("/dev/null", "w") as fnull:
+			retcode = subprocess.call(cmd, stdout=fnull, stderr=fnull)
+			if retcode is not 0:
+				log("%sReturn code %d at command: %s" % (prefix,retcode,str(cmd)))
+	p = multiprocessing.Process(target=_fire_and_forget, args=(cmd,log,prefix))
+	p.start()
 
 # Threaded callback class
 class ThreadFunction():
@@ -36,12 +55,15 @@ class ThreadFunction():
 			(cmd, data) = self._q.get()
 			# run command
 			if cmd == _CALL:
-				self._f(*data)
+				try:
+					self._f(*data)
+				except Exception:
+					logger.error("ThreadFunction: Got exception out of handler thread: %s" % str(e))
 			elif cmd == _TERM:
 				assert data is None
 				break
 			else:
-				raise NotImplementedError("Command %d does not exist" % cmd)
+				logger.error("ThreadFunction: Command %d does not exist" % cmd)
 	
 	def __call__(self, *arg):
 		self._q.put((self._CALL, arg))
@@ -49,3 +71,23 @@ class ThreadFunction():
 	def stop(self):
 		self._q.put((_TERM, None))
 		self._t.join()
+
+# Thread timer-repeater class: Call a function every <sleep_time> seconds
+class ThreadRepeater():
+	def __init__(self, f, sleep_time):
+		self._f = f
+		self._stop = False
+		self._sleep_time = sleep_time
+		self._t = threading.Thread(target=self._thread_func)
+		self._t.start()
+	
+	def _thread_func():
+		while True:
+			if self._stop:
+				break
+			self._f()
+			time.sleep(sleep_time)
+	
+	def stop(self):
+		self._stop = True
+		self._t.join()