Add clustering app

apps/clustering/models.py

@@ -0,0 +1,44 @@
+from __future__ import absolute_import
+
+import os
+import datetime
+import platform
+
+import psutil
+
+from django.db import models, IntegrityError, transaction
+from django.db import close_connection
+from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import ugettext
+
+
+class NodeManager(models.Manager):
+    def myself(self):
+        node, created = self.model.objects.get_or_create(hostname=platform.node(), defaults={'memory_usage': 100})
+        node.refresh()
+        return node
+
+
+class Node(models.Model):
+    hostname = models.CharField(max_length=255, verbose_name=_(u'hostname'))
+    cpuload = models.PositiveIntegerField(blank=True, default=0, verbose_name=_(u'cpu load'))
+    heartbeat = models.DateTimeField(blank=True, default=datetime.datetime.now(), verbose_name=_(u'last heartbeat check'))
+    memory_usage = models.FloatField(blank=True, verbose_name=_(u'memory usage'))
+    
+    objects = NodeManager()
+
+    def __unicode__(self):
+        return self.hostname
+        
+    def refresh(self):
+        self.cpuload = psutil.cpu_percent()
+        self.memory_usage = psutil.phymem_usage().percent
+        self.save()
+   
+    def save(self, *args, **kwargs):
+        self.heartbeat = datetime.datetime.now()
+        return super(Node, self).save(*args, **kwargs)
+
+    class Meta:
+        verbose_name = _(u'node')
+        verbose_name_plural = _(u'nodes')