From bc0f8dead7dd4e98643ee7bd3a1a50011d8c29a9 Mon Sep 17 00:00:00 2001
From: Andrew Brestick <brestick@mcs.anl.gov>
Date: Tue, 15 Jul 2008 16:23:17 +0000
Subject: added support for alternate metadata plugin (BB plugin)

git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@4792 ce84e21b-d406-0410-9b95-82705330c041
---
 src/lib/Server/Core.py             | 50 ++++++++++++++++++++++----------------
 src/lib/Server/Plugins/Metadata.py |  7 +++---
 src/lib/Server/Plugins/__init__.py |  2 +-
 3 files changed, 34 insertions(+), 25 deletions(-)

diff --git a/src/lib/Server/Core.py b/src/lib/Server/Core.py
index b3742e8d3..2bbbbc4f4 100644
--- a/src/lib/Server/Core.py
+++ b/src/lib/Server/Core.py
@@ -225,25 +225,11 @@ class Core(object):
         self.stats = Statistics("%s/etc/statistics.xml" % (self.datastore))
 
         [data.remove('') for data in [structures, generators] if '' in data]
-
-        for plugin in structures + generators + ['Metadata']:
-            if not self.plugins.has_key(plugin):
-                try:
-                    mod = getattr(__import__("Bcfg2.Server.Plugins.%s" %
-                                             (plugin)).Server.Plugins, plugin)
-                except ImportError, e:
-                    logger.error("Failed to load plugin %s: %s" % (plugin, e))
-                    continue
-                plug = getattr(mod, plugin)
-                if plug.experimental:
-                    logger.info("Loading experimental plugin %s" % (plugin))
-                    logger.info("NOTE: Interface subject to change")
-                try:
-                    self.plugins[plugin] = plug(self, self.datastore)
-                except PluginInitError:
-                    logger.error("Failed to instantiate plugin %s" % (plugin))
-                except:
-                    logger.error("Unexpected instantiation failure for plugin %s" % (plugin), exc_info=1)
+        
+        
+        for plugin in structures + generators:
+                if not self.plugins.has_key(plugin):
+                    self.init_plugins(plugin)    
 
         plugins = self.plugins.values()
         while True:
@@ -252,7 +238,10 @@ class Core(object):
                 self.metadata = plugin
                 break
             if not plugins:
-                raise CoreInitError, "No Metadata plugin loaded"
+                self.init_plugins("Metadata")
+                self.metadata = self.plugins["Metadata"]
+                break
+
         for plug_names, plug_tname, plug_type, collection in \
             [(structures, 'structure', Bcfg2.Server.Plugin.StructurePlugin,
               self.structures),
@@ -269,7 +258,26 @@ class Core(object):
                 else:
                     logger.error("Plugin %s not loaded. Not enabled as a %s" \
                                  % (plugin, plug_tname))
-                    
+    
+    def init_plugins(self, plugin):
+        try:
+            mod = getattr(__import__("Bcfg2.Server.Plugins.%s" %
+                                (plugin)).Server.Plugins, plugin)
+        except ImportError, e:
+            logger.error("Failed to load plugin %s: %s" % (plugin, e))
+            return
+        plug = getattr(mod, plugin)
+        if plug.experimental:
+            logger.info("Loading experimental plugin %s" % (plugin))
+            logger.info("NOTE: Interface subject to change")
+        try:
+            self.plugins[plugin] = plug(self, self.datastore)
+        except PluginInitError:
+            logger.error("Failed to instantiate plugin %s" % (plugin))
+        except:
+            logger.error("Unexpected instantiation failure for plugin %s" % 
+                (plugin), exc_info=1)    
+            
     def GetStructures(self, metadata):
         '''Get all structures for client specified by metadata'''
         return reduce(lambda x, y:x+y,
diff --git a/src/lib/Server/Plugins/Metadata.py b/src/lib/Server/Plugins/Metadata.py
index 3a2c48528..75b80459f 100644
--- a/src/lib/Server/Plugins/Metadata.py
+++ b/src/lib/Server/Plugins/Metadata.py
@@ -82,12 +82,13 @@ class Metadata(Bcfg2.Server.Plugin.MetadataPlugin,
     __author__ = 'bcfg-dev@mcs.anl.gov'
     __name__ = "Metadata"
 
-    def __init__(self, core, datastore):
+    def __init__(self, core, datastore, watch_clients=True):
         Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
-        self.__name__ = 'Metadata'
+        #self.__name__ = 'Metadata'
         try:
             core.fam.AddMonitor("%s/%s" % (self.data, "groups.xml"), self)
-            core.fam.AddMonitor("%s/%s" % (self.data, "clients.xml"), self)
+            if watch_clients:
+                core.fam.AddMonitor("%s/%s" % (self.data, "clients.xml"), self)
         except:
             raise Bcfg2.Server.Plugin.PluginInitError
         self.states = {'groups.xml':False, 'clients.xml':False}
diff --git a/src/lib/Server/Plugins/__init__.py b/src/lib/Server/Plugins/__init__.py
index db17e5c26..6d5173fe5 100644
--- a/src/lib/Server/Plugins/__init__.py
+++ b/src/lib/Server/Plugins/__init__.py
@@ -1,6 +1,6 @@
 '''imports for Bcfg2.Server.Plugins'''
 __revision__ = '$Revision$'
 
-__all__ = ['Account', 'Base', 'Bundler', 'Cfg', 'Hostbase', 'Metadata',
+__all__ = ['Account', 'Base', 'BB', 'Bundler', 'Cfg', 'Hostbase', 'Metadata',
            'Pkgmgr', 'Rules', 'SSHbase', 'Svcmgr', 'TCheetah',
            'SGenshi', 'TGenshi', 'Vhost']
-- 
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