1 #

     2 # Copyright (c) 2008-2015 Thierry Florac <tflorac AT ulthar.net>

     3 # All Rights Reserved.

     4 #

     5 # This software is subject to the provisions of the Zope Public License,

     6 # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.

     7 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

     8 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

     9 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

    10 # FOR A PARTICULAR PURPOSE.

    11 #

    12 

    13 __docformat__ = 'restructuredtext'

    14 

    15 

    16 # import standard library

    17 

    18 # import interfaces

    19 from pyams_sequence.interfaces import ISequentialIntIds, ISequentialIdInfo

    20 from pyams_utils.interfaces.site import ISiteGenerations

    21 from zope.site.interfaces import INewLocalSite

    22 

    23 # import packages

    24 from pyams_catalog.index import FieldIndexWithInterface

    25 from pyams_catalog.site import check_required_indexes

    26 from pyams_sequence.utility import SequentialIntIds

    27 from pyams_utils.registry import utility_config

    28 from pyams_utils.site import check_required_utilities

    29 from pyramid.events import subscriber

    30 

    31 

    32 REQUIRED_UTILITIES = ((ISequentialIntIds, '', SequentialIntIds, 'Sequential IDs'), )

    33 

    34 

    35 REQUIRED_INDEXES = (('oid', FieldIndexWithInterface, {'interface': ISequentialIdInfo,

    36                                                       'discriminator': 'hex_oid'}), )

    37 

    38 

    39 @subscriber(INewLocalSite)

    40 def handle_new_local_site(event):

    41     """Check for required utilities when a site is created"""

    42     site = event.manager.__parent__

    43     check_required_utilities(site, REQUIRED_UTILITIES)

    44     check_required_indexes(site, REQUIRED_INDEXES)

    45 

    46 

    47 @utility_config(name='PyAMS sequence', provides=ISiteGenerations)

    48 class SequenceGenerationsChecker(object):

    49     """PyAMS sequence generations checker"""

    50 

    51     generation = 1

    52 

    53     def evolve(self, site, current=None):

    54         """Check for required utilities"""

    55         check_required_utilities(site, REQUIRED_UTILITIES)

    56         check_required_indexes(site, REQUIRED_INDEXES)