From c12293f58090240a7cdd695c8e3ceeabe9e7f0fe Mon Sep 17 00:00:00 2001 From: Cameron Patrick Date: Sun, 1 Aug 2004 07:53:53 +0000 Subject: [PATCH] more cleanups, started on nice logging framework --- sql-edition/servers/VendServer.py | 76 ++++++++++++++++++++++++------- 1 file changed, 59 insertions(+), 17 deletions(-) diff --git a/sql-edition/servers/VendServer.py b/sql-edition/servers/VendServer.py index 9ee8ef1..9e1ba7a 100755 --- a/sql-edition/servers/VendServer.py +++ b/sql-edition/servers/VendServer.py @@ -6,7 +6,7 @@ USE_DB = 0 import ConfigParser import sys, os, string, re, pwd, signal import logging -from traceback import print_tb +from traceback import format_tb if USE_DB: import pg from time import time, sleep from popen2 import popen2 @@ -389,12 +389,14 @@ def parse_args(): 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('-v', '--virtualvend', action='store_false', default=True, dest='use_lat', help='use the virtual vending server instead of LAT') + 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: @@ -431,7 +433,15 @@ class VendConfigFile: print "Error reading config file "+config_file+": " + str(e) sys.exit(1) -def set_stuff_up() +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) @@ -442,10 +452,39 @@ def set_stuff_up() 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 become_daemon(options): +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) @@ -476,24 +515,27 @@ 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: - print "Killed by signal." + logging.info("Killed by signal, cleaning up") + clean_up_nicely(options, config_opts) + logging.info("Vend Server stopped") break - except SystemExit, e: - raise e except: (exc_type, exc_value, exc_traceback) = sys.exc_info() - print - print "Uh-oh, unhandled " + str(exc_type) + " exception" - print "Message: ", str(exc_value) - print - print_tb(exc_traceback) + tb = format_tb(exc_traceback, 20) del exc_traceback - print - print "This message should be considered a bug in the Vend Server." - print "Please report this to someone who can fix it." + + 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) - print - print "Trying again anyway (might not help, but hey...)" + logging.warning("Trying again anyway (might not help, but hey...)") -- 2.20.1