OtherSiteInformation.py

# Class definition:
#   OtherSiteInformation
#   This class is the prototype of a site information class inheriting from SiteInformation
#   Instances are generated with SiteInformationFactory via pUtil::getSiteInformation()
#   Implemented as a singleton class
#   http://stackoverflow.com/questions/42558/python-and-the-singleton-pattern

# import relevant python/pilot modules
from SiteInformation import SiteInformation  # Main site information class
from pUtil import tolog                      # Logging method that sends text to the pilot log
from pUtil import readpar                    # Used to read values from the schedconfig DB (queuedata)
from PilotErrors import PilotErrors          # Error codes

class OtherSiteInformation(SiteInformation):

    # private data members
    __experiment = "Other"
    __instance = None

    # Required methods

    def __init__(self):
        """ Default initialization """
# not needed?

        pass

    def __new__(cls, *args, **kwargs):
        """ Override the __new__ method to make the class a singleton """

        if not cls.__instance:
            cls.__instance = super(OtherSiteInformation, cls).__new__(cls, *args, **kwargs)

        return cls.__instance

    def getExperiment(self):
        """ Return a string with the experiment name """

        return self.__experiment

    def isTier1(self, sitename):
        """ Is the given site a Tier-1? """

        return False

    def isTier2(self, sitename):
        """ Is the given site a Tier-2? """

        return False

    def isTier3(self):
        """ Is the given site a Tier-3? """

        return False

    def allowAlternativeStageOut(self):
        """ Is alternative stage-out allowed? """
        # E.g. if stage-out to primary SE (at Tier-2) fails repeatedly, is it allowed to attempt stage-out to secondary SE (at Tier-1)?

        return False

if __name__ == "__main__":

    a = OtherSiteInformation()
    tolog("Experiment: %s" % (a.getExperiment()))