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
59 :param creds: Credentials to communicate with the rm (XmppClient for OMF)
63 super(OMFChannel, self).__init__(ec, guid)
65 self._nodes_guid = list()
73 def valid_connection(self, guid):
74 """ Check if the connection with the guid in parameter is possible.
75 Only meaningful connections are allowed.
77 :param guid: Guid of the current RM
82 rm = self.ec.get_resource(guid)
84 if rm.get_rtype() in self._authorized_connections:
85 msg = "Connection between %s %s and %s %s accepted" % (
86 self.get_rtype(), self._guid, rm.get_rtype(), guid)
90 msg = "Connection between %s %s and %s %s refused" % (
91 self.get_rtype(), self._guid, rm.get_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
108 rm_iface = self.ec.get_resource(elt)
109 for conn in rm_iface.connections:
110 rm_node = self.ec.get_resource(conn)
111 if rm_node.get_rtype() == "OMFNode" and rm_node.get('hostname'):
112 if rm_iface.state < ResourceState.PROVISIONED or \
113 rm_node.state < ResourceState.READY:
115 couple = [rm_node.get('hostname'), rm_iface.get('alias')]
121 """ Deploy the RM. It means : Get the xmpp client and send messages
122 using OMF 5.4 protocol to configure the channel.
123 It becomes DEPLOYED after sending messages to configure the channel
126 if not (self.get('xmppSlice') and self.get('xmppHost')
127 and self.get('xmppPort') and self.get('xmppPassword')):
128 msg = "Credentials are not initialzed. XMPP Connections impossible"
130 raise RuntimeError, msg
132 if not self._omf_api :
133 self._omf_api = OMFAPIFactory.get_api(self.get('xmppSlice'),
134 self.get('xmppHost'), self.get('xmppPort'),
135 self.get('xmppPassword'), exp_id = self.exp_id)
137 if not self.get('channel'):
138 msg = "Channel's value is not initialized"
140 raise RuntimeError, msg
142 self._nodes_guid = self._get_target(self._connections)
144 if self._nodes_guid == "reschedule" :
145 self.ec.schedule("2s", self.deploy)
147 for couple in self._nodes_guid:
148 attrval = self.get('channel')
149 attrname = "net/%s/%s" % (couple[1], 'channel')
150 self._omf_api.configure(couple[0], attrname, attrval)
152 super(OMFChannel, self).do_deploy()
154 def do_release(self):
155 """ Clean the RM at the end of the experiment and release the API
159 OMFAPIFactory.release_api(self.get('xmppSlice'),
160 self.get('xmppHost'), self.get('xmppPort'),
161 self.get('xmppPassword'), exp_id = self.exp_id)
163 super(OMFChannel, self).do_release()