Implement the balance of decision mode support (tested and working)

git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@4933 ce84e21b-d406-0410-9b95-82705330c041

1 files changed, 51 insertions, 0 deletions

diff --git a/src/lib/Server/Plugins/Decisions.py b/src/lib/Server/Plugins/Decisions.py
new file mode 100644
index 000000000..4b758cdd4
--- /dev/null
+++ b/src/lib/Server/Plugins/Decisions.py
@@ -0,0 +1,51 @@
+import Bcfg2.Server.Plugin, lxml.etree
+
+class DecisionFile(Bcfg2.Server.Plugin.SpecificData):
+    def handle_event(self, event):
+        Bcfg2.Server.Plugin.SpecificData.handle_event(self, event)
+        self.contents = lxml.etree.XML(self.data)
+
+    def get_decisions(self):
+        return [(x.get('type'), x.get('name')) for x in self.contents.xpath('.//Decision')]
+
+class DecisionSet(Bcfg2.Server.Plugin.EntrySet):
+    def __init__(self, path, fam, encoding):
+        """Container for decision specification files
+        
+        Arguments:
+        - `path`: repository path
+        - `fam`: reference to the file monitor
+        - `encoding`: XML character encoding
+        """
+        pattern = '(white|black)list'
+        Bcfg2.Server.Plugin.EntrySet.__init__(self, pattern, path, False, \
+                                              DecisionFile, encoding)
+        fam.AddMonitor(path, self)
+
+    def HandleEvent(self, event):
+        if event.filename != self.path:
+            return self.handle_event(event)
+
+    def GetDecisions(self, metadata, mode):
+        ret = []
+        candidates = [c for c in self.get_matching(metadata)
+                      if c.name.split('/')[-1].startswith(mode)]
+        for c in candidates:
+            ret += c.get_decisions()
+        return ret
+
+class Decisions(DecisionSet, Bcfg2.Server.Plugin.DecisionPlugin):
+    __name__ = 'Decisions'
+    __version__ = '$Id: $'
+    __author__ = 'bcfg-dev@mcs.anl.gov'
+
+    def __init__(self, core, datastore):
+        """Decisions plugins
+        
+        Arguments:
+        - `core`: Bcfg2.Core instance
+        - `datastore`: File repository location
+        """
+        Bcfg2.Server.Plugin.DecisionPlugin.__init__(self, core, datastore)
+        DecisionSet.__init__(self, self.data, core.fam, core.encoding)
+