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Viewing changes to nova/scheduler/filters/__init__.py

  • Committer: Package Import Robot
  • Author(s): Chuck Short, Adam Gandelman, Chuck Short
  • Date: 2012-11-23 09:04:58 UTC
  • mfrom: (1.1.66)
  • Revision ID: package-import@ubuntu.com-20121123090458-91565o7aev1i1h71
Tags: 2013.1~g1-0ubuntu1
https://launchpad.net/bugs/1073289
https://launchpad.net/bugs/1076442
[ Adam Gandelman ]
* debian/control: Ensure novaclient is upgraded with nova,
  require python-keystoneclient >= 1:2.9.0. (LP: #1073289)
* debian/patches/{ubuntu/*, rbd-security.patch}: Dropped, applied
  upstream.
* debian/control: Add python-testtools to Build-Depends.

[ Chuck Short ]
* New upstream version.
* Refreshed debian/patches/avoid_setuptools_git_dependency.patch.
* debian/rules: FTBFS if missing binaries.
* debian/nova-scheudler.install: Add missing rabbit-queues and
  nova-rpc-zmq-receiver.
* Remove nova-volume since it doesnt exist anymore, transition to cinder-*.
* debian/rules: install apport hook in the right place.
* debian/patches/ubuntu-show-tests.patch: Display test failures.
* debian/control: Add depends on genisoimage
* debian/control: Suggest guestmount.
* debian/control: Suggest websockify. (LP: #1076442)
* debian/nova.conf: Disable nova-volume service.
* debian/control: Depend on xen-system-* rather than the hypervisor.
* debian/control, debian/mans/nova-conductor.8, debian/nova-conductor.init,
  debian/nova-conductor.install, debian/nova-conductor.logrotate
  debian/nova-conductor.manpages, debian/nova-conductor.postrm
  debian/nova-conductor.upstart.in: Add nova-conductor service.
* debian/control: Add python-fixtures as a build deps.

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nova/scheduler/filters/__init__.py
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Scheduler host filters
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"""
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import os
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import types
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from nova import exception
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from nova.openstack.common import importutils
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class BaseHostFilter(object):
 
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from nova import filters
 
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from nova.openstack.common import log as logging
 
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LOG = logging.getLogger(__name__)
 
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class BaseHostFilter(filters.BaseFilter):
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    """Base class for host filters."""
 
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    def _filter_one(self, obj, filter_properties):
 
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        """Return True if the object passes the filter, otherwise False."""
 
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        return self.host_passes(obj, filter_properties)
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    def host_passes(self, host_state, filter_properties):
 
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        """Return True if the HostState passes the filter, otherwise False.
 
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        Override this in a subclass.
 
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        """
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        raise NotImplementedError()
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    def _full_name(self):
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        """module.classname of the filter."""
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        return "%s.%s" % (self.__module__, self.__class__.__name__)
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def _is_filter_class(cls):
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    """Return whether a class is a valid Host Filter class."""
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    return type(cls) is types.TypeType and issubclass(cls, BaseHostFilter)
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def _get_filter_classes_from_module(module_name):
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    """Get all filter classes from a module."""
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    classes = []
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    module = importutils.import_module(module_name)
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    for obj_name in dir(module):
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        itm = getattr(module, obj_name)
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        if _is_filter_class(itm):
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            classes.append(itm)
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    return classes
 
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class HostFilterHandler(filters.BaseFilterHandler):
 
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    def __init__(self):
 
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        super(HostFilterHandler, self).__init__(BaseHostFilter)
 
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def all_filters():
 
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    """Return a list of filter classes found in this directory.
 
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    This method is used as the default for available scheduler filters
 
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    and should return a list of all filter classes available.
 
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    """
 
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    return HostFilterHandler().get_all_classes()
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def standard_filters():
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    """Return a list of filter classes found in this directory."""
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    classes = []
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    filters_dir = __path__[0]
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    for dirpath, dirnames, filenames in os.walk(filters_dir):
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        relpath = os.path.relpath(dirpath, filters_dir)
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        if relpath == '.':
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            relpkg = ''
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        else:
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            relpkg = '.%s' % '.'.join(relpath.split(os.sep))
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        for fname in filenames:
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            root, ext = os.path.splitext(fname)
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            if ext != '.py' or root == '__init__':
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                continue
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            module_name = "%s%s.%s" % (__package__, relpkg, root)
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            mod_classes = _get_filter_classes_from_module(module_name)
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            classes.extend(mod_classes)
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    return classes
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def get_filter_classes(filter_class_names):
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    """Get filter classes from class names."""
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    classes = []
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    for cls_name in filter_class_names:
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        obj = importutils.import_class(cls_name)
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        if _is_filter_class(obj):
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            classes.append(obj)
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        elif type(obj) is types.FunctionType:
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            # Get list of classes from a function
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            classes.extend(obj())
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        else:
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            raise exception.ClassNotFound(class_name=cls_name,
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                    exception='Not a valid scheduler filter')
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    return classes
 
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    """Deprecated.  Configs should change to use all_filters()."""
 
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    LOG.deprecated(_("Use 'nova.scheduler.filters.all_filters' instead "
 
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            "of 'nova.scheduler.filters.standard_filters'"))
 
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    return all_filters()