From 586c84c211a28312786758784ba2449e3a0b1c12 Mon Sep 17 00:00:00 2001
From: Narayan Desai <desai@mcs.anl.gov>
Date: Thu, 27 May 2004 19:24:45 +0000
Subject: kill other imports

2004/05/27 14:16:14-05:00 anl.gov!desai
kill fam import

2004/05/27 14:15:32-05:00 anl.gov!desai
remove fam object

2004/05/27 14:13:15-05:00 anl.gov!desai
update to use fam

2004/05/25 15:41:20-05:00 anl.gov!desai
change __constructor__ to __child__ for readability

2004/05/25 15:40:29-05:00 anl.gov!desai
add constructor class data to DirectoryBacked

(Logical change 1.19)


git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@79 ce84e21b-d406-0410-9b95-82705330c041
---
 src/GeneratorUtils.py | 103 ++++++++++++++++++++++----------------------------
 1 file changed, 45 insertions(+), 58 deletions(-)

(limited to 'src')

diff --git a/src/GeneratorUtils.py b/src/GeneratorUtils.py
index 03895159f..eb2f4c487 100644
--- a/src/GeneratorUtils.py
+++ b/src/GeneratorUtils.py
@@ -1,64 +1,51 @@
 #!/usr/bin/env python
-# $Id$
-
-from os import listdir, stat
-from stat import ST_MTIME
+# $Id: $
 
 class FileBacked(object):
-    '''FileBacked is a class that will cache file data and automatically reload it as required from disk.'''
-
-    def __init__(self,filename):
-        '''Setup initial structures'''
-        self.filename = filename
-        try:
-            self.mtime = stat(filename)[ST_MTIME]
-            self._data = file(filename).read()
-        except OSError:
-            self.mtime = 0
-            self._data = None
-            self.setdata('')
-
-    def getdata(self):
-        mtime = stat(self.filename)[ST_MTIME]
-        if mtime != self.mtime:
-            self._data = file(self.filename).read()
-            self.mtime = mtime
-        return self._data
-
-    def setdata(self,val):
-        if val != self._data:
-            self._data = val
-            file(self.filename,'w').write(val)
-            self.mtime = stat(self.filename)[ST_MTIME]
-
-    data=property(getdata,setdata)
+    '''This object caches file data in memory.
+    HandleEvent is called whenever fam registers an event.
+    Index can parse the data into member data as required.'''
+    
+    def __init__(self, name):
+        self.name = name
+
+    def HandleEvent(self, event=None):
+        self.data = file(self.name).read()
+        self.Index()
+
+    def Index(self):
+        pass
 
 class DirectoryBacked(object):
-    '''DirectoryBacked caches a complete directory (including proper negative caching).
-    This class is READ-ONLY.'''
-
-    def __init__(self,path):
-        self.path = path
-        self._entries = {}
-        self.mtime = stat(path)[ST_MTIME]
-        for entry in listdir(path):
-            self._entries[entry] = FileBacked("%s/%s"%(path,entry))
-
-    def GetEntries(self):
-        mtime = stat(self.path)[ST_MTIME]
-        if mtime != self.mtime:
-            current = self._entries.keys()
-            new = listdir(self.path)
-            for key in new:
-                if key not in current:
-                    self._entries[key] = FileBacked("%s/%s"%(self.path,key))
-            for key in current:
-                if key not in new:
-                    del self._entries[key]
-        return self._entries
-
-    def SetEntries(self,val):
-        pass
+    def __init__(self, name, fam):
+        self.name = name
+        self.fam = fam
+        self.entries = {}
+        self.inventory = False
+        fam.AddMonitor(name, self)
+
+    def AddEntry(self, name):
+        if self.entries.has_key(name):
+            print "got multiple adds"
+        else:
+            self.entries[name] = FileBacked('%s/%s'%(self.name, name))
+            self.entries[name].HandleEvent()
+
+    def HandleEvent(self, event):
+        action = event.code2str()
+        print "Got event %s %s %s"%(event.requestID, event.code2str(), event.filename)
+        if action == 'exists':
+            if event.filename != self.name:
+                self.AddEntry(event.filename)
+        elif action == 'created':
+            self.AddEntry(event.filename)
+        elif action == 'changed':
+            self.entries[event.filename].HandleEvent(event)
+        elif action == 'deleted':
+            if self.entries.has_key(event.filename):
+                del self.entries[event.filename]
+        elif action in ['endExist']:
+            pass
+        else:
+            print "Got unknown event %s %s %s"%(event.requestID, event.code2str(), event.filename)
 
-    entries = property(GetEntries,SetEntries)
-                
-- 
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