From d7c2e5beaab5d77b0f1376e83a3efa502de64e52 Mon Sep 17 00:00:00 2001
From: Narayan Desai <desai@mcs.anl.gov>
Date: Wed, 30 Jun 2004 15:03:30 +0000
Subject: (Logical change 1.22)

git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@98 ce84e21b-d406-0410-9b95-82705330c041
---
 src/Structure.py | 21 +++++++++++++++
 src/bundler.py   | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 100 insertions(+)

(limited to 'src')

diff --git a/src/Structure.py b/src/Structure.py
index e69de29bb..c948d326d 100644
--- a/src/Structure.py
+++ b/src/Structure.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+# $Id: $
+
+class Structure(object):
+    '''The Structure class is used to define patterns of data in host configurations
+    Structure subtyped classes provide functions that group configurations into dependent
+    and independent clauses'''
+
+    def __init__(self, core, datastore):
+        self.data = "%s/%s"%(datastore,self.__name__)
+        self.core = core
+        self.__setup__()
+
+    def __setup__(self):
+        pass
+
+    def Construct(self, metadata, subset):
+        '''Returns a list of configuration structure chunks for client'''
+        return []
+
+    
diff --git a/src/bundler.py b/src/bundler.py
index e69de29bb..3e0c1e625 100644
--- a/src/bundler.py
+++ b/src/bundler.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+# $Id: $
+
+from GeneratorUtils import XMLFileBacked, DirectoryBacked
+from Structure import Structure
+
+from elementtree.ElementTree import Element
+
+class Bundle(XMLFileBacked):
+    def __iter__(self):
+        return iter(self.entries)
+
+class Translation(XMLFileBacked):
+    __identifier__ = 'system'
+    
+    def Index(self):
+        XMLFileBacked.Index(self)
+        self.images = []
+        self.trans = {'VPackage':{}, 'VConfig':{}, 'VService':{}, 'VFS':{}}
+        for entry in self.entries:
+            if entry.tag == 'Image':
+                self.images.append(entry.attrib['name'] )
+            else:
+                self.trans[entry.tag][entry.attrib['name']] = entry.getchildren()
+
+class TranslationSet(DirectoryBacked):
+    '''TranslationSet is the container for all active translations in the system. It
+    is coherent cache of a directory.'''
+    __child__ = Translation
+
+    def __iter__(self):
+        return self.entries.iteritems()
+
+    def FindTranslation(self, image):
+        '''Locate a translation by image name. Needed because translations can handle multiple images'''
+        x = [v for k,v in self if image in v.images]
+        if len(x) == 1:
+            return x[0]
+        else:
+            raise "Bang"
+
+    def BindTranslation(self, image, ba):
+        '''Map Bundle elements through the translation layer into concrete elements'''
+        return map(lambda x:(x.tag, x.attrib),
+                   self.FindTranslation(image).trans[ba.tag][ba.attrib['name']])
+            
+class BundleSet(DirectoryBacked):
+    '''The Bundler handles creation of dependent clauses based on bundle definitions'''
+    __child__ = Bundle
+
+    def __iter__(self):
+        return self.entries.iteritems()
+
+class bundler(Structure):
+    '''The bundler creates dependent clauses based on the bundle/translation scheme from bcfg1'''
+    def __init__(self, core, datastore):
+        self.core = core
+        self.datastore = "%s/bundler/"%(datastore)
+        self.bundles = BundleSet("%s/bundles"%(self.datastore), self.core.fam)
+        self.translations = TranslationSet("%s/translations"%(self.datastore), self.core.fam)
+        # now we build the local repr of the translated bundleset
+        self.core.fam.AddMonitor("%s/bundles"%(self.datastore), self)
+        self.core.fam.AddMonitor("%s/translations"%(self.datastore), self)
+        # check which order events will be delivered in; need bundles/trans updated before self
+        self.HandleEvent(True)
+
+    def HandleEvent(self,event):
+        self.built = {}
+        for image in reduce(lambda x,y:x+y, [v.images for k,v in self.translations],[]):
+            self.built[image] = {}
+            for (name,bundle) in self.bundles:
+                name = name[:-4]
+                self.built[image][name] = []
+                for entry in bundle:
+                    self.built[image][name].extend(self.translations.BindTranslation(image,entry))
+
+    def Construct(self, metadata):
+        return map(lambda x:self.built[metadata.image][x], metadata.bundles)
+
-- 
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