switch Construct call

2005/09/06 21:15:34-05:00 anl.gov!desai
switch to new Plugin API

2005/09/06 21:14:38-05:00 anl.gov!desai
Rename: src/lib/Server/Structures/Bundler.py -> src/lib/Server/Plugins/Bundler.py

(Logical change 1.300)


git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@1201 ce84e21b-d406-0410-9b95-82705330c041

1 files changed, 122 insertions, 0 deletions

diff --git a/src/lib/Server/Plugins/Bundler.py b/src/lib/Server/Plugins/Bundler.py
index e69de29bb..81b21435a 100644
--- a/src/lib/Server/Plugins/Bundler.py
+++ b/src/lib/Server/Plugins/Bundler.py
@@ -0,0 +1,122 @@
+'''This provides bundle clauses with translation functionality'''
+__revision__ = '$Revision$'
+
+from copy import deepcopy
+from syslog import LOG_ERR, syslog
+
+from Bcfg2.Server.Generator import SingleXMLFileBacked, XMLFileBacked, DirectoryBacked
+from Bcfg2.Server.Plugin import Plugin
+
+from elementtree.ElementTree import Element, XML
+from xml.parsers.expat import ExpatError
+
+class ImageFile(SingleXMLFileBacked):
+    '''This file contains image -> system mappings'''
+    def __init__(self, filename, fam):
+        self.images = {}
+        SingleXMLFileBacked.__init__(self, filename, fam)
+    
+    def Index(self):
+        '''Build data structures out of the data'''
+        try:
+            xdata = XML(self.data)
+        except ExpatError, err:
+            syslog(LOG_ERR, "Failed to parse file %s" % (self.name))
+            syslog(LOG_ERR, err)
+            del self.data
+            return
+        self.images = {}
+        for child in xdata.getchildren():
+            [name, pkg, service] = [child.get(field) for field in ['name', 'package', 'service']]
+            for grandchild in child.getchildren():
+                self.images[grandchild.get('name')] = (name, pkg, service)
+
+class Bundle(XMLFileBacked):
+    '''Bundles are configuration specifications (with image/translation abstraction)'''
+
+    def __init__(self, filename):
+        self.all = []
+        self.attributes = {}
+        self.systems = {}
+        XMLFileBacked.__init__(self, filename)
+
+    def Index(self):
+        '''Build data structures from the source data'''
+        try:
+            xdata = XML(self.data)
+        except ExpatError, err:
+            syslog(LOG_ERR, "Failed to parse file %s" % (self.name))
+            syslog(LOG_ERR, str(err))
+            del self.data
+            return
+        self.all = []
+        self.systems = {}
+        self.attributes = {}
+        for entry in xdata.getchildren():
+            if entry.tag == 'System':
+                self.systems[entry.attrib['name']] = entry.getchildren()
+            elif entry.tag == 'Attribute':
+                self.attributes[entry.get('name')] = entry.getchildren()
+            else:
+                self.all.append(entry)
+        del self.data
+
+    def BuildBundle(self, metadata, system):
+        '''Build a bundle for a particular client'''
+        bundlename = self.name.split('/')[-1]
+        bundle = Element('Bundle', name=bundlename)
+        for entry in self.all + self.systems.get(system, []):
+            bundle.append(deepcopy(entry))
+        for attribute in [aname for (scope, aname) in [item.split('.') for item in metadata.attributes]
+                          if scope == bundlename[:-4]]:
+            for entry in self.attributes.get(attribute, []):
+                bundle.append(deepcopy(entry))
+        return bundle
+            
+class BundleSet(DirectoryBacked):
+    '''The Bundler handles creation of dependent clauses based on bundle definitions'''
+    __child__ = Bundle
+
+class Bundler(Plugin):
+    '''The bundler creates dependent clauses based on the bundle/translation scheme from bcfg1'''
+    __name__ =  'Bundler'
+    __version__ = '$Id$'
+    __author__ = 'bcfg-dev@mcs.anl.gov'
+    
+    def __init__(self, core, datastore):
+        Plugin.__init__(self, core, datastore)
+        self.imageinfo = ImageFile("%s/etc/imageinfo.xml"%(datastore), self.core.fam)
+        self.bundles = BundleSet(self.data, self.core.fam)
+
+    def BuildStructures(self, metadata):
+        '''Build all structures for client (metadata)'''
+        try:
+            (system, package, service) = self.GetTransInfo(metadata)
+        except KeyError:
+            syslog(LOG_ERR, "Failed to find translation information for image %s" % metadata.image)
+            return []
+        bundleset = []
+        for bundlename in metadata.bundles:
+            if not self.bundles.entries.has_key("%s.xml"%(bundlename)):
+                syslog(LOG_ERR, "Client %s requested nonexistent bundle %s"%(metadata.hostname, bundlename))
+                continue
+
+            bundle = self.bundles.entries["%s.xml" % (bundlename)].BuildBundle(metadata, system)
+            # now we need to populate service/package types
+            for entry in bundle.getchildren():
+                if entry.tag == 'Package':
+                    entry.attrib['type'] = package
+                elif entry.tag == 'Service':
+                    entry.attrib['type'] = service
+            bundleset.append(bundle)
+        return bundleset
+
+    def GetTransInfo(self, metadata):
+        '''Get Translation info for metadata.image'''
+        if self.imageinfo.images.has_key(metadata.image):
+            return self.imageinfo.images[metadata.image]
+        else:
+            raise KeyError, metadata.image
+
+    
+