From f2d1d3c9136bf5b2bee71fa2678281c989bec620 Mon Sep 17 00:00:00 2001
From: Narayan Desai <desai@mcs.anl.gov>
Date: Thu, 1 Dec 2005 21:00:12 +0000
Subject: Handle fam event processing failures, and fix another case where xml
 comments cause problems

git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@1604 ce84e21b-d406-0410-9b95-82705330c041
---
 src/lib/Server/Core.py   | 36 ++++++++++++++++--------------------
 src/lib/Server/Plugin.py |  6 +++++-
 2 files changed, 21 insertions(+), 21 deletions(-)

(limited to 'src')

diff --git a/src/lib/Server/Core.py b/src/lib/Server/Core.py
index 4350e580a..979d86f5f 100644
--- a/src/lib/Server/Core.py
+++ b/src/lib/Server/Core.py
@@ -14,6 +14,13 @@ from Bcfg2.Server.Plugin import PluginInitError, PluginExecutionError
 from Bcfg2.Server.Metadata import MetadataStore, MetadataConsistencyError
 from Bcfg2.Server.Statistics import Statistics
 
+def log_failure(msg):
+    syslog(LOG_ERR, "Unexpected failure in %s" % (msg))
+    (trace, val, trb) = exc_info()
+    for line in extract_tb(trb):
+        syslog(LOG_ERR, '  File "%s", line %i, in %s\n    %s\n'%line)
+    syslog(LOG_ERR, "%s: %s\n"%(trace, val))
+
 class CoreInitError(Exception):
     '''This error is raised when the core cannot be initialized'''
     pass
@@ -50,7 +57,10 @@ class FamFam(object):
         reqid = event.requestID
         if self.users.has_key(reqid):
             #print "dispatching event %s %s to obj %s handle :%s:" % (event.code2str(), event.filename, self.users[reqid], event.requestID)
-            self.users[reqid].HandleEvent(event)
+            try:
+                self.users[reqid].HandleEvent(event)
+            except:
+                log_failure("handling event for file %s" % (event.filename))
 
     def Service(self):
         '''Handle all fam work'''
@@ -180,12 +190,7 @@ class Core(object):
                 except PluginInitError:
                     syslog(LOG_ERR, "Failed to instantiate plugin %s" % (plugin))
                 except:
-                    syslog(LOG_ERR, "Unexpected initiantiation failure for plugin %s" % (plugin))
-                    (trace, val, trb)=exc_info()
-                    for line in extract_tb(trb):
-                        syslog(LOG_ERR, '  File "%s", line %i, in %s\n    %s\n'%line)
-                    syslog(LOG_ERR, "%s: %s\n"%(trace, val))
-                    del trace, val, trb
+                    log_failure("Unexpected initiantiation failure for plugin %s" % (plugin))
 
         for plugin in structures:
             if self.plugins.has_key(plugin):
@@ -243,7 +248,7 @@ class Core(object):
         try:
             structures = self.GetStructures(meta)
         except:
-            self.LogFailure("GetStructures")
+            log_failure("GetStructures")
             return Element("error", type='structure error')
         
         for astruct in structures:
@@ -251,28 +256,19 @@ class Core(object):
                 self.BindStructure(astruct, meta)
                 config.append(astruct)
             except:
-                self.LogFailure("BindStructure")
+                log_failure("BindStructure")
         syslog(LOG_INFO, "Generated config for %s in %s seconds"%(client, time() - start))
         return config
 
-    def LogFailure(self, failure):
-        '''Log Failures in unexpected cases'''
-        (trace, val, trb) = exc_info()
-        syslog(LOG_ERR, "Unexpected failure in %s" % (failure))
-        for line in extract_tb(trb):
-            syslog(LOG_ERR, '  File "%s", line %i, in %s\n    %s\n' % line)
-        syslog(LOG_ERR, "%s: %s\n"%(trace, val))
-        del trace, val, trb
-
     def Service(self):
         '''Perform periodic update tasks'''
         while self.fam.fm.pending:
             try:
                 self.fam.HandleEvent()
             except:
-                self.LogFailure("FamEvent")
+                log_failure("FamEvent")
         try:
             self.stats.WriteBack()
         except:
-            self.LogFailure("Statistics")
+            log_failure("Statistics")
             
diff --git a/src/lib/Server/Plugin.py b/src/lib/Server/Plugin.py
index 77187bb1d..d7c72a357 100644
--- a/src/lib/Server/Plugin.py
+++ b/src/lib/Server/Plugin.py
@@ -1,7 +1,7 @@
 '''This module provides the baseclass for Bcfg2 Server Plugins'''
 __revision__ = '$Revision:$'
 
-from lxml.etree import XML, XMLSyntaxError, _Comment
+from lxml.etree import XML, XMLSyntaxError, _Comment, tostring
 from os import stat
 from stat import ST_MTIME
 from syslog import syslog, LOG_ERR, LOG_INFO
@@ -183,6 +183,10 @@ class ScopedXMLFile(SingleXMLFileBacked):
 
     def StoreRecord(self, metadata, entry):
         '''Store scoped record based on metadata'''
+        if isinstance(entry, _Comment):
+            return
+        elif not entry.attrib.has_key('name'):
+            syslog(LOG_ERR, "Got malformed record %s" % (tostring(entry)))
         if not self.store.has_key(entry.tag):
             self.store[entry.tag] = {}
         if not self.store[entry.tag].has_key(entry.attrib['name']):
-- 
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