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/>.
18 # Author: Alina Quereilhac <alina.quereilhac@inria.fr>
19 # Julien Tribino <julien.tribino@inria.fr>
21 from nepi.execution.resource import ResourceManager, clsinit_copy, \
22 ResourceState, reschedule_delay
23 from nepi.execution.attribute import Attribute, Flags
25 from nepi.resources.omf.omf_resource import ResourceGateway, OMFResource
26 from nepi.resources.omf.omf_api import OMFAPIFactory
30 class OMFChannel(OMFResource):
32 .. class:: Class Args :
34 :param ec: The Experiment controller
35 :type ec: ExperimentController
36 :param guid: guid of the RM
38 :param creds: Credentials to communicate with the rm (XmppClient for OMF)
43 _authorized_connections = ["OMFWifiInterface", "OMFNode"]
46 def _register_attributes(cls):
47 """Register the attributes of an OMF channel
50 channel = Attribute("channel", "Name of the application")
51 cls._register_attribute(channel)
53 def __init__(self, ec, guid):
55 :param ec: The Experiment controller
56 :type ec: ExperimentController
57 :param guid: guid of the RM
61 super(OMFChannel, self).__init__(ec, guid)
63 self._nodes_guid = list()
71 def valid_connection(self, guid):
72 """ Check if the connection with the guid in parameter is possible.
73 Only meaningful connections are allowed.
75 :param guid: Guid of the current RM
80 rm = self.ec.get_resource(guid)
82 if rm.get_rtype() in self._authorized_connections:
83 msg = "Connection between %s %s and %s %s accepted" % (
84 self.get_rtype(), self._guid, rm.get_rtype(), guid)
88 msg = "Connection between %s %s and %s %s refused" % (
89 self.get_rtype(), self._guid, rm.get_rtype(), guid)
94 def _get_target(self, conn_set):
96 Get the couples (host, interface) that uses this channel
98 :param conn_set: Connections of the current Guid
101 :return: self._nodes_guid
106 rm_iface = self.ec.get_resource(elt)
107 for conn in rm_iface.connections:
108 rm_node = self.ec.get_resource(conn)
109 if rm_node.get_rtype() == "OMFNode" and rm_node.get('hostname'):
110 if rm_iface.state < ResourceState.PROVISIONED or \
111 rm_node.state < ResourceState.READY:
113 couple = [rm_node.get('hostname'), rm_iface.get('alias')]
119 """ Deploy the RM. It means : Get the xmpp client and send messages
120 using OMF 5.4 protocol to configure the channel.
121 It becomes DEPLOYED after sending messages to configure the channel
124 if not (self.get('xmppSlice') and self.get('xmppHost')
125 and self.get('xmppPort') and self.get('xmppPassword')):
126 msg = "Credentials are not initialzed. XMPP Connections impossible"
128 raise RuntimeError, msg
130 if not self._omf_api :
131 self._omf_api = OMFAPIFactory.get_api(self.get('xmppSlice'),
132 self.get('xmppHost'), self.get('xmppPort'),
133 self.get('xmppPassword'), exp_id = self.exp_id)
135 if not self.get('channel'):
136 msg = "Channel's value is not initialized"
138 raise RuntimeError, msg
140 self._nodes_guid = self._get_target(self._connections)
142 if self._nodes_guid == "reschedule" :
143 self.ec.schedule("2s", self.deploy)
145 for couple in self._nodes_guid:
146 attrval = self.get('channel')
147 attrname = "net/%s/%s" % (couple[1], 'channel')
148 self._omf_api.configure(couple[0], attrname, attrval)
150 super(OMFChannel, self).do_deploy()
152 def do_release(self):
153 """ Clean the RM at the end of the experiment and release the API
157 OMFAPIFactory.release_api(self.get('xmppSlice'),
158 self.get('xmppHost'), self.get('xmppPort'),
159 self.get('xmppPassword'), exp_id = self.exp_id)
161 super(OMFChannel, self).do_release()