def acquire(self):
'''Acquire a lock, returning self if successful, False otherwise'''
if self.islocked():
if self.debug:
lock = self._readlock()
log.critical('Previous lock detected: %s' % self.pddr(lock))
return False
try:
fh = open(self.path, 'w')
fh.write(self.addr())
fh.close()
if self.debug:
log.debug('Acquired lock: %s' % self.fddr())
except:
if os.path.isfile(self.path):
try:
os.unlink(self.path)
except:
pass
raise (self.FileLockAcquisitionError,
'Error acquiring lock: %s' % self.fddr())
return self
for i in range(len(sys.argv)):
if (sys.argv[i] == '-a') or (sys.argv[i] == '--action'):
action = sys.argv[i+1]
if action == None:
actionUsage()
sys.exit()
# Make sure actions are recognised
found = 0
for va in validActions:
if (action == va) or ((action) and (action).startswith("_")): # this way we allow any custom _XXXX actions
found=1
break
if found != 1:
if (action): log.critical("Unrecognized action '" + action + "'\n")
actionUsage()
sys.exit()
# Init Optparser
parser = OptionParser(version="%prog \n\n version: '"+ scriptGlobals.version + "'\n revision: '"+ scriptGlobals.revision + "'\n build date: '" + scriptGlobals.buildDate + "'")
# Init Action Specific Options (but don't add them to the parser yet)
envpropsOption = Option("-e", "--envprops", dest="envprops", help="Environment specific properties file (mandatory)", metavar="<FILENAME>")
moduleOption = Option("-f", "--module", dest="module", help="Deployable module filename or file URL (mandatory)", metavar="<FILENAME>")
rollbackOption = Option("-r", "--rollback", dest="rollback", help="Rollback filename (mandatory)", metavar="<FILENAME>")
# Add common options
if (action):
# The pinnacle of all options :-) (determines what other options will be added to the parser)
parser.add_option("-a", "--action", dest="action", help="Choose one of the following actions '" +", ".join(validActions) + "' (mandatory)", metavar="<ACTION>")