+
+def connect_to_vend(options, cf):
+ # Open vending machine via LAT?
+ if options.use_lat:
+ latclient = LATClient(service = cf.ServiceName, password = cf.ServicePassword, server_name = cf.ServerName, connect_password = cf.ConnectPassword, priv_password = cf.PrivPassword)
+ rfh, wfh = latclient.get_fh()
+ else:
+ #(rfh, wfh) = popen2('../../virtualvend/vvend.py')
+ import socket
+ sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
+ sock.connect((options.host, options.port))
+ rfh = sock.makefile('r')
+ wfh = sock.makefile('w')
+
+ return rfh, wfh
+
+def parse_args():
+ from optparse import OptionParser
+
+ op = OptionParser(usage="%prog [OPTION]...")
+ op.add_option('-f', '--config-file', default='/etc/dispense/servers.conf', metavar='FILE', dest='config_file', help='use the specified config file instead of /etc/dispense/servers.conf')
+ op.add_option('--virtualvend', action='store_false', default=True, dest='use_lat', help='use the virtual vending server instead of LAT')
+ op.add_option('-n', '--hostname', dest='host', default='localhost', help='the hostname to connect to for virtual vending machine mode (default: localhost)')
+ op.add_option('-p', '--port', dest='port', default=5150, type='int', help='the port number to connect to (default: 5150)')
+ op.add_option('-l', '--log-file', metavar='FILE', dest='log_file', default='', help='log output to the specified file')
+ 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('--pid-file', dest='pid_file', metavar='FILE', default='', help='store daemon\'s pid in the given file')
+ options, args = op.parse_args()
+
+ if len(args) != 0:
+ op.error('extra command line arguments: ' + ' '.join(args))
+
+ return options
+
+config_options = {
+ 'DBServer': ('Database', 'Server'),
+ 'DBName': ('Database', 'Name'),
+ 'DBUser': ('VendingMachine', 'DBUser'),
+ 'DBPassword': ('VendingMachine', 'DBPassword'),
+
+ 'ServiceName': ('VendingMachine', 'ServiceName'),
+ 'ServicePassword': ('VendingMachine', 'Password'),
+
+ 'ServerName': ('DecServer', 'Name'),
+ 'ConnectPassword': ('DecServer', 'ConnectPassword'),
+ 'PrivPassword': ('DecServer', 'PrivPassword'),
+ }
+
+class VendConfigFile:
+ def __init__(self, config_file, options):
+ try:
+ cp = ConfigParser.ConfigParser()
+ cp.read(config_file)
+
+ for option in options:
+ section, name = options[option]
+ value = cp.get(section, name)
+ self.__dict__[option] = value
+
+ except ConfigParser.Error, e:
+ print "Error reading config file "+config_file+": " + str(e)
+ sys.exit(1)
+
+def create_pid_file(name):
+ try:
+ pid_file = file(name, 'w')
+ pid_file.write('%d\n'%os.getpid())
+ pid_file.close()
+ except IOError, e:
+ logging.warning('unable to write to pid file '+name+': '+str(e))
+
+def set_stuff_up():
+ def do_nothing(signum, stack): pass
+ def stop_server(signum, stack): raise KeyboardInterrupt
+ signal.signal(signal.SIGHUP, do_nothing)
+ signal.signal(signal.SIGTERM, stop_server)
+ signal.signal(signal.SIGINT, stop_server)
+
+ options = parse_args()
+ config_opts = VendConfigFile(options.config_file, config_options)
+ set_up_logging(options)
+ if options.daemon: become_daemon()
+ if options.pid_file != '': create_pid_file(options.pid_file)
+
+ return options, config_opts
+
+def clean_up_nicely(options, config_opts):
+ if options.pid_file != '':
+ try:
+ os.unlink(options.pid_file)
+ logging.debug('Removed pid file '+options.pid_file)
+ except OSError: pass # if we can't delete it, meh
+
+def set_up_logging(options):
+ logger = logging.getLogger()
+
+ stderr_logger = logging.StreamHandler(sys.stderr)
+ stderr_logger.setFormatter(logging.Formatter('%(levelname)s: %(message)s'))
+ logger.addHandler(stderr_logger)
+
+ if options.log_file != '':
+ try:
+ file_logger = logging.FileHandler(options.log_file)
+ file_logger.setFormatter(logging.Formatter('%(asctime)s %(levelname)s: %(message)s'))
+ logger.addHandler(file_logger)
+ except IOError, e:
+ logger.warning('unable to write to log file '+options.log_file+': '+str(e))
+
+ if options.verbose:
+ logger.setLevel(logging.DEBUG)
+ else:
+ logger.setLevel(logging.INFO)
+
+
+def become_daemon():
+ dev_null = file('/dev/null')
+ fd = dev_null.fileno()
+ os.dup2(fd, 0)
+ os.dup2(fd, 1)
+ os.dup2(fd, 2)
+ if os.fork() != 0:
+ sys.exit(0)
+
+def do_vend_server(options, config_opts):
+ while True:
+ try:
+ rfh, wfh = connect_to_vend(options, config_opts)
+ except (LATClientException, socket.error), e:
+ (exc_type, exc_value, exc_traceback) = sys.exc_info()
+ del exc_traceback
+ print
+ print "Connection error: "+str(exc_type)+" "+str(e)
+ print "Trying again in 5 seconds."
+ sleep(5)
+ continue
+ try:
+ run_forever(rfh, wfh, options, config_opts)
+ except VendingException:
+ print
+ print "Connection died, trying again..."
+
+if __name__ == '__main__':
+ options, config_opts = set_stuff_up()
+ while True:
+ try:
+ logging.info('Starting Vend Server')
+ do_vend_server(options, config_opts)
+ logging.warning('Vend Server finished unexpectedly, restarting')
+ except KeyboardInterrupt:
+ logging.info("Killed by signal, cleaning up")
+ clean_up_nicely(options, config_opts)
+ logging.info("Vend Server stopped")
+ break
+ except:
+ (exc_type, exc_value, exc_traceback) = sys.exc_info()
+ tb = format_tb(exc_traceback, 20)
+ del exc_traceback
+
+ logging.critical("Uh-oh, unhandled " + str(exc_type) + " exception")
+ logging.critical("Message: " + str(exc_value))
+ logging.critical("Traceback:")
+ for event in tb:
+ for line in event.split('\n'):
+ logging.critical(' '+line)
+ logging.critical("This message should be considered a bug in the Vend Server.")
+ logging.critical("Please report this to someone who can fix it.")
+ sleep(10)
+ logging.warning("Trying again anyway (might not help, but hey...)")
+
git.ucc.asn.au / zanchey / dispense2.git / blobdiff
UCC git Repository :: git.ucc.asn.au