Changeset 5

Timestamp:

03/21/05 11:41:16 (19 years ago)

Author:

bastiaans

Message:

ganglia_example.xml:

A Ganglia XML style example

daemon/togad.py:

Start of the TOrque-GAnglia Daemon

• Added a GangliaXMLGatherer class
• Added a GangliaXMLHandler class

Location:

trunk

Files:

• daemon/togad.py (modified) (1 diff)
• ganglia_example.xml (added)

trunk/daemon/togad.py

@@ -1 +1 @@
 #!/usr/bin/env python
 
-import xml.sax
+from xml.sax import make_parser
+from xml.sax.handler import ContentHandler 
+import socket
+import sys
 
-class ContentGenerator( xml.sax.handler.ContentHandler ):
+class GangliaXMLHandler(ContentHandler):
+        """
+        Parse/Handle XML
+        """
 
-    def __init__(self, out = sys.stdout):
-        handler.ContentHandler.__init__(self)
-        self._out = out
+        def __init__ (self, searchTerm):
+                self.isHostElement, self.isxReboundsElement = 0, 0;
+   
+        def startElement(self, name, attrs):
 
-    # ContentHandler methods
-        
-    def startDocument(self):
-        self._out.write('<?xml version="1.0" encoding="iso-8859-1"?>\n')
+                if name == 'player':     
+                        self.playerName = attrs.get('name',"")
+                        self.playerAge = attrs.get('age',"")
+                        self.playerHeight = attrs.get('height',"")
+                elif name == 'points':
+                        self.isPointsElement= 1;
+                        self.playerPoints = "";
+                elif name == 'rebounds':
+                        self.isReboundsElement = 1;
+                        self.playerRebounds = "";
+                return
 
-    def startElement(self, name, attrs):
-        self._out.write('<' + name)
-        for (name, value) in attrs.items():
-            self._out.write(' %s="%s"' % (name, saxutils.escape(value)))
-        self._out.write('>')
+        def characters (self, ch):
+                if self.isPointsElement== 1:
+                        self.playerPoints += ch
+                if self.isReboundsElement == 1:
+                        self.playerRebounds += ch
 
-    def endElement(self, name):
-        self._out.write('</%s>' % name)
+        def endElement(self, name):
+                if name == 'points':
+                        self.isPointsElement= 0
+                if name == 'rebounds':
+                        self.inPlayersContent = 0
+                if name == 'player' and self.searchTerm== self.playerName :
+                        print '<h2>Statistics for player:' , self.playerName, '</h2><br>(age:', self.playerAge , 'height' , self.playerHeight , ")<br>"
+                        print 'Match average:', self.playerPoints , 'points,' , self.playerRebounds, 'rebounds'
 
-    def characters(self, content):
-        self._out.write(saxutils.escape(content))
+class GangliaXMLGatherer:
+        """
+        Connect to a gmetad and return fd
+        """
 
-    def ignorableWhitespace(self, content):
-        self._out.write(content)
-        
-    def processingInstruction(self, target, data):
-        self._out.write('<?%s %s?>' % (target, data))
+        def __init__(self, host, port):
+                self.host = host
+                self.port = port
 
-# --- The main program
+        def getFileDescriptor(self):
+                s = None
+                for res in socket.getaddrinfo(self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM):
+                        af, socktype, proto, canonname, sa = res
+                        try:
+                                s = socket.socket(af, socktype, proto)
+                        except socket.error, msg:
+                                s = None
+                                continue
+                        try:
+                                s.connect(sa)
+                        except socket.error, msg:
+                                s.close()
+                                s = None
+                                continue
+                        break
 
-parser = xml.sax.make_parser()
-parser.setContentHandler(ContentGenerator())
-parser.parse(sys.argv[1])
+                if s is None:
+                        print 'could not open socket'
+                        sys.exit(1)
+
+                return s.fileno()
+
+                #s.send('Hello, world')
+                #data = s.recv(1024)
+                #s.close()
+                #print 'Received', `data`
+
+def main():
+        """
+        My Main
+        """
+
+        myXMLGatherer = GangliaXMLGatherer( localhost, 8651 ) 
+
+        myParser = make_parser()   
+        myHandler = GangliaXMLHandler()
+        myParser.setContentHandler( myHandler )
+        myParser.parse( myXMLGatherer.getFileDescriptor() )
+
+# Let's go
+main()