added ability to specify log level via command-line option of pyres_worker

Author: mjrusso

scripts/pyres_worker

@@ -1,17 +1,41 @@
 #!/usr/bin/env python
+
+import logging
+
+from optparse import OptionParser
 from pyres.worker import Worker
+
+LOG_LEVELS = {
+    'debug': logging.DEBUG,
+    'info': logging.INFO,
+    'warning': logging.WARNING,
+    'error': logging.ERROR,
+    'critical': logging.CRITICAL
+}
+
 def main():
-    from optparse import OptionParser
+    
     usage = "usage: %prog [options] arg1"
     parser = OptionParser(usage=usage)
     #parser.add_option("-q", dest="queue_list")
     parser.add_option("--host", dest="host", default="localhost")
     parser.add_option("--port",dest="port",type="int", default=6379)
     parser.add_option("-i", '--interval', dest='interval', default=None, help='the default time interval to sleep between runs')    
+    parser.add_option('-l', '--log-level', dest='log_level', default=LOG_LEVELS['info'], help='log level.  Valid values are "debug", "info", "warning", "error", "critical", in decreasing order of verbosity. Defaults to "info" if parameter not specified.')
     (options,args) = parser.parse_args()
+
     if len(args) != 1:
         parser.print_help()
         parser.error("Argument must be a comma seperated list of queues")
+
+    if options.log_level not in LOG_LEVELS.keys():
+        parser.print_help()
+        parser.error("invalid log level specified")
+    else:
+        log_level = LOG_LEVELS[options.log_level]
+        
+    logging.basicConfig(level=log_level, format="%(asctime)s: %(levelname)s: %(message)s")
+
     queues = args[0].split(',')
     server = '%s:%s' % (options.host,options.port)
     Worker.run(queues, server, options.interval)