move OLT service from XOS repo
diff --git a/xos/tosca/resources/voltdevice.py b/xos/tosca/resources/voltdevice.py
new file mode 100644
index 0000000..9665b85
--- /dev/null
+++ b/xos/tosca/resources/voltdevice.py
@@ -0,0 +1,52 @@
+import os
+import pdb
+import sys
+import tempfile
+sys.path.append("/opt/tosca")
+from translator.toscalib.tosca_template import ToscaTemplate
+
+from services.volt.models import VOLTDevice, VOLTService, AccessDevice, AccessAgent
+from xosresource import XOSResource
+
+class XOSVOLTDevice(XOSResource):
+    provides = "tosca.nodes.VOLTDevice"
+    xos_model = VOLTDevice
+    copyin_props = ["openflow_id", "driver"]
+
+    def get_xos_args(self, throw_exception=True):
+        args = super(XOSVOLTDevice, self).get_xos_args()
+
+        volt_service_name = self.get_requirement("tosca.relationships.MemberOfService", throw_exception=throw_exception)
+        if volt_service_name:
+            args["volt_service"] = self.get_xos_object(VOLTService, throw_exception=throw_exception, name=volt_service_name)
+
+        agent_name = self.get_requirement("tosca.relationships.UsesAgent", throw_exception=throw_exception)
+        if agent_name:
+            args["access_agent"] = self.get_xos_object(AccessAgent, throw_exception=throw_exception, name=agent_name)
+
+        return args
+
+    def postprocess(self, obj):
+        access_devices_str = self.get_property("access_devices")
+        access_devices = []
+        if access_devices_str:
+            lines = [x.strip() for x in access_devices_str.split(",")]
+            for line in lines:
+                if not (" " in line):
+                    raise "Malformed access device `%s`", line
+                (uplink, vlan) = line.split(" ")
+                uplink=int(uplink.strip())
+                vlan=int(vlan.strip())
+                access_devices.append( (uplink, vlan) )
+
+            for ad in list(AccessDevice.objects.filter(volt_device=obj)):
+                if (ad.uplink, ad.vlan) not in access_devices:
+                    print "Deleting AccessDevice '%s'" % ad
+                    ad.delete()
+
+            for access_device in access_devices:
+                existing_objs = AccessDevice.objects.filter(volt_device=obj, uplink=access_device[0], vlan=access_device[1])
+                if not existing_objs:
+                    ad = AccessDevice(volt_device=obj, uplink=access_device[0], vlan=access_device[1])
+                    ad.save()
+                    print "Created AccessDevice '%s'" % ad