Synnefo

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from django.core.management.base import BaseCommand

from optparse import make_option

from synnefo.quotas.util import get_db_holdings, get_quotaholder_holdings

from synnefo.webproject.management.utils import pprint_table

class Command(BaseCommand):

    help = """

    Verify that cyclades.* resource usage.

    Verify that usage calculated from Cyclades DB agrees with the usage

    recorded in the effective quota database (Quotaholder)

    """

    output_transaction = True

    option_list = BaseCommand.option_list + (

        make_option("--userid", dest="userid",

                    default=None,

                    help="Verify usage only for this user"),

    )

    def handle(self, *args, **options):

        write = self.stdout.write

        userid = options['userid']

        users = [userid] if userid else None

        # Get info from DB

        db_holdings = get_db_holdings(users)

        users = db_holdings.keys()

        qh_holdings = get_quotaholder_holdings(users)

        qh_users = qh_holdings.keys()

        if len(qh_users) < len(users):

            for u in set(users) - set(qh_users):

                write("Unknown entity: %s\n" % u)

                users = qh_users

        headers = ("User", "Resource", "Database", "Quotaholder")

        unsynced = []

        for user in users:

            db = db_holdings[user]

            qh = qh_holdings[user]

            if not self.verify_resources(user, db.keys(), qh.keys()):

                continue

            for res in db.keys():

                if db[res] != qh[res]:

                    unsynced.append((user, res, str(db[res]), str(qh[res])))

        if unsynced:

            pprint_table(self.stderr, unsynced, headers)

    def verify_resources(self, user, db_resources, qh_resources):

        write = self.stderr.write

        db_res = set(db_resources)

        qh_res = set(qh_resources)

        if qh_res == db_res:

            return True

        db_extra = db_res - qh_res

        if db_extra:

            for res in db_extra:

                write("Resource %s exists in DB for %s but not in QH\n"

                      % (res, user))

        qh_extra = qh_res - db_res

        if qh_extra:

            for res in qh_extra:

                write("Resource %s exists in QH for %s but not in DB\n"

                      % (res, user))

        return False