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##############################################################################
#
# Copyright (c) 2006 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Global components support
"""
from zope.interface import implementer
from zope.interface.adapter import AdapterRegistry
from zope.interface.registry import Components
from zope.component.interfaces import IComponentLookup
from zope.component._compat import _BLANK
def GAR(components, registryName):
return getattr(components, registryName)
class GlobalAdapterRegistry(AdapterRegistry):
"""A global adapter registry
This adapter registry's main purpose is to be picklable in combination
with a site manager."""
def __init__(self, parent, name):
self.__parent__ = parent
self.__name__ = name
super(GlobalAdapterRegistry, self).__init__()
def __reduce__(self):
return GAR, (self.__parent__, self.__name__)
@implementer(IComponentLookup)
class BaseGlobalComponents(Components):
def _init_registries(self):
self.adapters = GlobalAdapterRegistry(self, 'adapters')
self.utilities = GlobalAdapterRegistry(self, 'utilities')
def __reduce__(self):
# Global site managers are pickled as global objects
return self.__name__
base = BaseGlobalComponents('base')
try:
from zope.testing.cleanup import addCleanUp
except ImportError: #pragma NO COVER
pass
else:
addCleanUp(lambda: base.__init__('base'))
del addCleanUp
globalSiteManager = base
def getGlobalSiteManager():
return globalSiteManager
# The following APIs provide global registration support for Python code.
# We eventually want to deprecate these in favor of using the global
# component registry directly.
def provideUtility(component, provides=None, name=_BLANK):
base.registerUtility(component, provides, name, event=False)
def provideAdapter(factory, adapts=None, provides=None, name=_BLANK):
base.registerAdapter(factory, adapts, provides, name, event=False)
def provideSubscriptionAdapter(factory, adapts=None, provides=None):
base.registerSubscriptionAdapter(factory, adapts, provides, event=False)
def provideHandler(factory, adapts=None):
base.registerHandler(factory, adapts, event=False)