X-Git-Url: https://git.ralfj.de/saartuer.git/blobdiff_plain/41111d6443061891dd2ec7d5bf5ab856c0546fc0..82c945d5140bce7c1884c8bc734f3403626bb5f1:/libtuer.py

diff --git a/libtuer.py b/libtuer.py
index 097a25a..f1e8d54 100644
--- a/libtuer.py
+++ b/libtuer.py
@@ -5,12 +5,13 @@ import email.mime.text, email.utils
 # Logging configuration
 syslogLevel = logging.INFO
 mailLevel   = logging.CRITICAL # must be "larger" than syslog level!
-mailAddress = ['post+tuer'+'@'+'ralfj.de', 'vorstand@lists.hacksaar.de']
+from config import mailAddress
 printLevel  = logging.DEBUG
 
 # Mail logging handler
 def sendeMail(subject, text, receivers, sender='sphinx@hacksaar.de', replyTo=None):
-	if not isinstance(type(receivers), list): receivers = [receivers]
+	assert isinstance(receivers, list)
+	if not len(receivers): return # nothing to do
 	# construct content
 	msg = email.mime.text.MIMEText(text.encode('UTF-8'), 'plain', 'UTF-8')
 	msg['Subject'] = subject
@@ -57,16 +58,26 @@ class Logger:
 
 logger = Logger()
 
+# run a Python command asynchronously
+def fire_and_forget(f):
+	def _fire_and_forget():
+		try:
+			f()
+		except Exception:
+			logger.critical("fire_and_forget: Got exception out of callback:\n%s" % traceback.format_exc())
+	t = threading.Thread(target=_fire_and_forget)
+	t.start()
+
 # 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 ():
+def fire_and_forget_cmd (cmd, log_prefix):
+	logger.debug("Firing and forgetting command from %s: %s" % (log_prefix,str(cmd)))
+	def _fire_and_forget_cmd ():
 		with open("/dev/null", "w") as fnull:
 			retcode = subprocess.call(cmd, stdout=fnull, stderr=fnull)
 			if retcode is not 0:
-				logger.error("%sReturn code %d at command: %s" % (prefix,retcode,str(cmd)))
-	t = threading.Thread(target=_fire_and_forget)
-	t.start()
+				logger.error("%sReturn code %d at command: %s" % (log_prefix,retcode,str(cmd)))
+	fire_and_forget(_fire_and_forget_cmd)
 
 # Threaded callback class
 class ThreadFunction():
@@ -88,8 +99,7 @@ class ThreadFunction():
 				try:
 					self._f(*data)
 				except Exception as e:
-					logger.critical("ThreadFunction: Got exception out of handler thread %s: %s" % (self.name, str(e)))
-					logger.debug(traceback.format_exc())
+					logger.critical("ThreadFunction: Got exception out of handler thread %s:\n%s" % (self.name, traceback.format_exc()))
 			elif cmd == ThreadFunction._TERM:
 				assert data is None
 				break
@@ -100,6 +110,13 @@ class ThreadFunction():
 		self._q.put((ThreadFunction._CALL, arg))
 	
 	def stop(self):
+		# empty the queue
+		try:
+			while True:
+				self._q.get_nowait()
+		except queue.Empty:
+			pass
+		# now wait till the job-in-progress is done
 		self._q.put((ThreadFunction._TERM, None))
 		self._t.join()
 
@@ -120,8 +137,7 @@ class ThreadRepeater():
 			try:
 				self._f()
 			except Exception as e:
-				logger.critical("ThreadRepeater: Got exception out of handler thread %s: %s" % (self.name, str(e)))
-				logger.debug(traceback.format_exc())
+				logger.critical("ThreadRepeater: Got exception out of handler thread %s:\n%s" % (self.name, traceback.format_exc()))
 			time.sleep(self._sleep_time)
 	
 	def stop(self):