From 909d081411ff7b16e0e1d1affed736a38999129e Mon Sep 17 00:00:00 2001
From: Brian Pellin <bpellin@mcs.anl.gov>
Date: Tue, 4 Jan 2005 22:20:09 +0000
Subject: Auto merged

2005/01/04 16:20:00-06:00 (none)!bpellin
Added throttling for multiple events in file watching.

(Logical change 1.173)


git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@752 ce84e21b-d406-0410-9b95-82705330c041
---
 src/lib/Server/Generator.py | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

(limited to 'src/lib/Server/Generator.py')

diff --git a/src/lib/Server/Generator.py b/src/lib/Server/Generator.py
index 1d77c2b9a..485976f16 100644
--- a/src/lib/Server/Generator.py
+++ b/src/lib/Server/Generator.py
@@ -1,9 +1,11 @@
 '''This is a baseclass not intended for instantiation'''
-__revision__ = '$Revision$'
+__revision__ = '$Revision: 1.34 $'
 
 from elementtree.ElementTree import XML
 from syslog import syslog, LOG_ERR, LOG_INFO
 from xml.parsers.expat import ExpatError
+from os import stat
+from stat import ST_MTIME
 
 class GeneratorError(Exception):
     '''Generator runtime error used to inform upper layers of internal generator failure'''
@@ -80,15 +82,28 @@ class FileBacked(object):
         object.__init__(self)
         self.data = ''
         self.name = name
-        self.HandleEvent()
+        self.mtime = 0
+        #self.readonce = 0
+        #self.HandleEvent()
 
     def HandleEvent(self, event=None):
         '''Read file upon update'''
+        oldmtime = self.mtime
         try:
-            self.data = file(self.name).read()
-        except IOError:
-            syslog(LOG_ERR, "Failed to read file %s" % (self.name))
-        self.Index()
+            self.mtime = stat(self.name)[ST_MTIME]
+        except OSError:
+            syslog(LOG_ERR, "Failed to stat file %s" % (self.name))
+            
+        if self.mtime > oldmtime:
+            try:
+            #    if self.readonce == 0:
+            #        self.readonce = 1
+            #    else:
+            #        syslog(LOG_INFO, "Updated file %s" % (self.name))
+                self.data = file(self.name).read()
+                self.Index()
+            except IOError:
+                syslog(LOG_ERR, "Failed to read file %s" % (self.name))
 
     def Index(self):
         '''Update local data structures based on current file state'''
-- 
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