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""" The Decisions plugin provides a flexible method to whitelist or
blacklist certain entries. """
import os
import sys
import lxml.etree
import Bcfg2.Server.Plugin
class DecisionFile(Bcfg2.Server.Plugin.SpecificData):
""" Representation of a Decisions XML file """
def __init__(self, name, specific, encoding):
Bcfg2.Server.Plugin.SpecificData.__init__(self, name, specific,
encoding)
self.contents = None
def handle_event(self, event):
Bcfg2.Server.Plugin.SpecificData.handle_event(self, event)
self.contents = lxml.etree.XML(self.data)
def get_decisions(self):
""" Get a list of whitelist or blacklist tuples """
return [(x.get('type'), x.get('name'))
for x in self.contents.xpath('.//Decision')]
class Decisions(Bcfg2.Server.Plugin.EntrySet,
Bcfg2.Server.Plugin.Plugin,
Bcfg2.Server.Plugin.Decision):
""" Decisions plugin
Arguments:
- `core`: Bcfg2.Core instance
- `datastore`: File repository location
"""
basename_is_regex = True
__author__ = 'bcfg-dev@mcs.anl.gov'
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
Bcfg2.Server.Plugin.Decision.__init__(self)
Bcfg2.Server.Plugin.EntrySet.__init__(self, '(white|black)list',
self.data,
DecisionFile,
core.setup['encoding'])
try:
core.fam.AddMonitor(self.data, self)
except OSError:
err = sys.exc_info()[1]
msg = 'Adding filemonitor for %s failed: %s' % (self.data, err)
self.logger.error(msg)
raise Bcfg2.Server.Plugin.PluginInitError(msg)
def HandleEvent(self, event):
""" Handle events on Decision files by passing them off to
EntrySet.handle_event """
if event.filename != self.path:
return self.handle_event(event)
def GetDecisions(self, metadata, mode):
ret = []
for cdt in self.get_matching(metadata):
if os.path.basename(cdt).startswith(mode):
ret.extend(cdt.get_decisions())
return ret
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