2 NEPI, a framework to manage network experiments
3 Copyright (C) 2013 INRIA
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 from nepi.execution.resource import ResourceManager, clsinit, ResourceState, \
22 from nepi.execution.attribute import Attribute, Flags
24 from nepi.resources.omf.omf_api import OMFAPIFactory
28 class OMFChannel(ResourceManager):
30 .. class:: Class Args :
32 :param ec: The Experiment controller
33 :type ec: ExperimentController
34 :param guid: guid of the RM
36 :param creds: Credentials to communicate with the rm (XmppClient for OMF)
41 This class is used only by the Experiment Controller through the Resource Factory
45 _authorized_connections = ["OMFWifiInterface", "OMFNode"]
49 def _register_attributes(cls):
50 """Register the attributes of an OMF channel
52 channel = Attribute("channel", "Name of the application")
53 xmppSlice = Attribute("xmppSlice","Name of the slice", flags = Flags.Credential)
54 xmppHost = Attribute("xmppHost", "Xmpp Server",flags = Flags.Credential)
55 xmppPort = Attribute("xmppPort", "Xmpp Port",flags = Flags.Credential)
56 xmppPassword = Attribute("xmppPassword", "Xmpp Port",flags = Flags.Credential)
57 cls._register_attribute(channel)
58 cls._register_attribute(xmppSlice)
59 cls._register_attribute(xmppHost)
60 cls._register_attribute(xmppPort)
61 cls._register_attribute(xmppPassword)
63 def __init__(self, ec, guid):
65 :param ec: The Experiment controller
66 :type ec: ExperimentController
67 :param guid: guid of the RM
69 :param creds: Credentials to communicate with the rm (XmppClient for OMF)
73 super(OMFChannel, self).__init__(ec, guid)
75 self._nodes_guid = list()
79 def valid_connection(self, guid):
80 """Check if the connection with the guid in parameter is possible. Only meaningful connections are allowed.
82 :param guid: Guid of the current RM
87 rm = self.ec.get_resource(guid)
88 if rm.rtype() in self._authorized_connections:
89 msg = "Connection between %s %s and %s %s accepted" % (self.rtype(), self._guid, rm.rtype(), guid)
92 msg = "Connection between %s %s and %s %s refused" % (self.rtype(), self._guid, rm.rtype(), guid)
96 def _get_target(self, conn_set):
98 Get the couples (host, interface) that uses this channel
100 :param conn_set: Connections of the current Guid
103 :return: self._nodes_guid
107 rm_iface = self.ec.get_resource(elt)
108 for conn in rm_iface.connections:
109 rm_node = self.ec.get_resource(conn)
110 if rm_node.rtype() == "OMFNode" and rm_node.get('hostname'):
111 if rm_iface.state < ResourceState.READY or rm_node.state < ResourceState.READY:
113 couple = [rm_node.get('hostname'), rm_iface.get('alias')]
115 self._nodes_guid.append(couple)
116 return self._nodes_guid
119 """ Discover the availables channels
125 """ Provision some availables channels
131 """Deploy the RM. It means : Get the xmpp client and send messages using OMF 5.4 protocol to configure the channel
132 It becomes DEPLOYED after sending messages to configure the channel
135 if not self._omf_api :
136 self._omf_api = OMFAPIFactory.get_api(self.get('xmppSlice'),
137 self.get('xmppHost'), self.get('xmppPort'), self.get('xmppPassword'))
140 if self.get('channel'):
141 set_nodes = self._get_target(self._connections)
142 if set_nodes == "reschedule" :
143 self.ec.schedule(reschedule_delay, self.deploy)
147 for couple in set_nodes:
148 #print "Couple node/alias : " + couple[0] + " , " + couple[1]
149 attrval = self.get('channel')
150 attrname = "net/%s/%s" % (couple[1], 'channel')
151 self._omf_api.configure(couple[0], attrname, attrval)
152 except AttributeError:
153 self._state = ResourceState.FAILED
154 msg = "Credentials are not initialzed. XMPP Connections impossible"
158 msg = "Channel's value is not initialized"
161 super(OMFChannel, self).deploy()
164 """Start the RM. It means nothing special for a channel for now
165 It becomes STARTED as soon as this method starts.
169 super(OMFChannel, self).start()
172 """Stop the RM. It means nothing special for a channel for now
173 It becomes STOPPED as soon as this method is called
176 super(OMFChannel, self).stop()
179 """Clean the RM at the end of the experiment and release the API
183 OMFAPIFactory.release_api(self.get('xmppSlice'),
184 self.get('xmppHost'), self.get('xmppPort'), self.get('xmppPassword'))