do even more logging
authorCameron Patrick <cameron@ucc.gu.uwa.edu.au>
Sun, 1 Aug 2004 08:14:34 +0000 (08:14 +0000)
committerCameron Patrick <cameron@ucc.gu.uwa.edu.au>
Sun, 1 Aug 2004 08:14:34 +0000 (08:14 +0000)
sql-edition/servers/VendServer.py

index 4d9aae2..a09ac2a 100755 (executable)
@@ -25,6 +25,8 @@ DOOR = 1
 SWITCH = 2
 KEY = 3
 
+class DispenseDatabaseException(Exception): pass
+
 class DispenseDatabase:
        def __init__(self, vending_machine, host, name, user, password):
                self.vending_machine = vending_machine
@@ -32,16 +34,15 @@ class DispenseDatabase:
                self.db.query('LISTEN vend_requests')
 
        def process_requests(self):
-               print 'processing'
+               logging.debug('database processing')
                query = 'SELECT request_id, request_slot FROM vend_requests WHERE request_handled = false'
                try:
                        outstanding = self.db.query(query).getresult()
                except (pg.error,), db_err:
-                       sys.stderr.write('Failed to query database: %s\n'%(db_err.strip()))
-                       return
+                       raise DispenseDatabaseException('Failed to query database: %s\n'%(db_err.strip()))
                for (id, slot) in outstanding:
                        (worked, code, string) = self.vending_machine.vend(slot)
-                       print (worked, code, string)
+                       logging.debug (str((worked, code, string)))
                        if worked:
                                query = 'SELECT vend_success(%s)'%id
                                self.db.query(query).getresult()
@@ -115,7 +116,7 @@ def verify_user_pin(uid, pin):
                return None
 
 def door_open_mode(v):
-       print "Entering open door mode"
+       logging.warning("Entering open door mode")
        v.display("-FEED  ME-")
        while True:
                e = v.next_event()
@@ -123,6 +124,7 @@ def door_open_mode(v):
                (event, params) = e
                if event == DOOR:
                        if params == 1: # door closed
+                               logging.warning('Leaving open door mode')
                                v.display("-YUM YUM!-")
                                sleep(1)
                                return
@@ -202,7 +204,7 @@ class MessageKeeper:
 
 def run_forever(rfh, wfh, options, cf):
        v = VendingMachine(rfh, wfh)
-       print 'PING is', v.ping()
+       logging.debug('PING is', v.ping())
 
        if USE_DB: db = DispenseDatabase(v, cf.DBServer, cf.DBName, cf.DBUser, cf.DBPassword)
        cur_user = ''
@@ -219,7 +221,11 @@ def run_forever(rfh, wfh, options, cf):
        last_timeout_refresh = None
 
        while True:
-               if USE_DB: db.handle_events()
+               if USE_DB:
+                       try:
+                               db.handle_events()
+                       except DispenseDatabaseException, e:
+                               logging.error('Database error: '+str(e))
 
                if time_to_autologout != None:
                        time_left = time_to_autologout - time()
@@ -254,7 +260,7 @@ def run_forever(rfh, wfh, options, cf):
                                continue
                time_to_idle = None
                (event, params) = e
-               print e
+               logging.debug('Got event: ' + repr(e))
                if event == DOOR:
                        if params == 0:
                                door_open_mode(v);
@@ -396,6 +402,7 @@ def parse_args():
        op.add_option('-s', '--syslog', dest='syslog', action='store_true', default=False, help='log output to syslog')
        op.add_option('-d', '--daemon', dest='daemon', action='store_true', default=False, help='run as a daemon')
        op.add_option('-v', '--verbose', dest='verbose', action='store_true', default=False, help='spit out lots of debug output')
+       op.add_option('-q', '--quiet', dest='quiet', action='store_true', default=False, help='only report errors')
        op.add_option('--pid-file', dest='pid_file', metavar='FILE', default='', help='store daemon\'s pid in the given file')
        options, args = op.parse_args()
 
@@ -430,7 +437,8 @@ class VendConfigFile:
                                self.__dict__[option] = value
                
                except ConfigParser.Error, e:
-                       print "Error reading config file "+config_file+": " + str(e)
+                       logging.critical("Error reading config file "+config_file+": " + str(e))
+                       logging.critical("Bailing out")
                        sys.exit(1)
 
 def create_pid_file(name):
@@ -450,9 +458,9 @@ def set_stuff_up():
        signal.signal(signal.SIGINT, stop_server)
 
        options = parse_args()
+       set_up_logging(options)
        config_opts = VendConfigFile(options.config_file, config_options)
        if options.daemon: become_daemon()
-       set_up_logging(options)
        if options.pid_file != '': create_pid_file(options.pid_file)
 
        return options, config_opts
@@ -483,8 +491,10 @@ def set_up_logging(options):
                sys_logger = logging.handlers.SysLogHandler('/dev/log', 'daemon')
                sys_logger.setFormatter(logging.Formatter('vendserver[%d]'%(os.getpid()) + ' %(levelname)s: %(message)s'))
                logger.addHandler(sys_logger)
-       
-       if options.verbose:
+
+       if options.quiet:
+               logger.setLevel(logging.WARNING)
+       elif options.verbose:
                logger.setLevel(logging.DEBUG)
        else:
                logger.setLevel(logging.INFO)

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