test without lockfile

file2mail.py

 import os
 import psutil
 import report
+import signal
 import time
 
-LOCK_FILE = os.path.join(config.TARGET_FOLDER, "lock")
-PID = os.getpid()
+CYCLE_TIME = 60
+SLEEP_TIME = .5
 
 logger = logging.getLogger('root')
 report.stdoutLoggingConfigure(log_name_lvl=[('root', config.LOG_LEVEL), ])
 
 
-def has_handle(fpath):
-    for proc in psutil.process_iter():
-        try:
-            for item in proc.open_files():
-                if fpath == item.path:
-                    return True
-        except Exception:
-            pass
+class GracefulKiller:
+  kill_now = False
+  def __init__(self):
+    signal.signal(signal.SIGINT, self.exit_gracefully)
+    signal.signal(signal.SIGTERM, self.exit_gracefully)
 
-    return False
+  def exit_gracefully(self, signum, frame):
+    self.kill_now = True
 
 
-if __name__ == "__main__":
-    while True:
-        # Check if LOCK_FILE EXISTS
-        if not os.path.exists(LOCK_FILE):
-            # Create LOCK_FILE
-            with open(LOCK_FILE, 'w') as fh:
-                fh.write(str(PID))
-            logger.debug("Creating lock-file %s with PID %d", LOCK_FILE, PID)
-            # Read LOCK_FILE content
-            with open(LOCK_FILE, 'r') as fh:
-                lf_pid = json.loads(fh.read())
-            # Check if LOCK_FILE has my PID
-            if lf_pid == PID:
-                # Scan for files to send
-                for filename in fstools.filelist(config.TARGET_FOLDER):
-                    # Exclude LOCK_FILE
-                    if filename != LOCK_FILE and not has_handle(filename):
-                        logger.info("Found %s to send via E-Mail to %s.", filename, config.SEND_TO)
-                        # Send File as E-Mail
-                        try:
-                            mail.send_mail(
-                                config.SEND_FROM,
-                                config.SEND_TO,
-                                "Gesanntes Dokument - %s" % os.path.basename(filename),
-                                "Hier ist das gescannte Dokument vom Scanner in Buchen:",
-                                files=[filename],
-                                server=config.SMTP_SERVER,
-                                username=config.SMTP_USER,
-                                password=config.SMTP_PASSWORD
-                            )
-                        except Exception:
-                            logger.exception("Exception while sending an E-Mail")
-                        else:
-                            # Remove file
-                            logger.debug("Removing file %s", filename)
-                            os.remove(filename)
-                # Remove LOCK_FILE
-                logger.debug("Removing lock-file %s", LOCK_FILE)
-                os.remove(LOCK_FILE)
-            else:
-                logger.warning("LOCK_FILE has PID %d and this proces %d. No action!", lf_pid, PID)
+def file2mail():
+    # Scan for files to send
+    for filename in fstools.filelist(config.TARGET_FOLDER):
+        logger.info("Found %s to send via E-Mail to %s.", filename, config.SEND_TO)
+        # Send File as E-Mail
+        try:
+            mail.send_mail(
+                config.SEND_FROM,
+                config.SEND_TO,
+                "Gesanntes Dokument - %s" % os.path.basename(filename),
+                "Hier ist das gescannte Dokument vom Scanner in Buchen:",
+                files=[filename],
+                server=config.SMTP_SERVER,
+                username=config.SMTP_USER,
+                password=config.SMTP_PASSWORD
+            )
+        except Exception:
+            logger.exception("Exception while sending an E-Mail")
         else:
-            logger.warning("LOCK_FILE %s already exists. No action!", LOCK_FILE)
-        time.sleep(60)
+            # Remove file
+            logger.debug("Removing file %s", filename)
+            os.remove(filename)
+
+
+if __name__ == '__main__':
+  killer = GracefulKiller()
+  i = 0
+  while not killer.kill_now:
+    time.sleep(.5)
+    if i >= CYCLE_TIME / SLEEP_TIME:
+        cyclic_job()
+        i = 0
+    else:
+        i += 1