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, failtrap
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 This class is used only by the Experiment Controller through the Resource Factory
47 _authorized_connections = ["OMFWifiInterface", "OMFNode"]
50 def _register_attributes(cls):
51 """Register the attributes of an OMF channel
54 channel = Attribute("channel", "Name of the application")
55 cls._register_attribute(channel)
57 def __init__(self, ec, guid):
59 :param ec: The Experiment controller
60 :type ec: ExperimentController
61 :param guid: guid of the RM
63 :param creds: Credentials to communicate with the rm (XmppClient for OMF)
67 super(OMFChannel, self).__init__(ec, guid)
69 self._nodes_guid = list()
77 def valid_connection(self, guid):
78 """ Check if the connection with the guid in parameter is possible.
79 Only meaningful connections are allowed.
81 :param guid: Guid of the current RM
86 rm = self.ec.get_resource(guid)
88 if rm.rtype() in self._authorized_connections:
89 msg = "Connection between %s %s and %s %s accepted" % (
90 self.rtype(), self._guid, rm.rtype(), guid)
94 msg = "Connection between %s %s and %s %s refused" % (
95 self.rtype(), self._guid, rm.rtype(), guid)
100 def _get_target(self, conn_set):
102 Get the couples (host, interface) that uses this channel
104 :param conn_set: Connections of the current Guid
107 :return: self._nodes_guid
112 rm_iface = self.ec.get_resource(elt)
113 for conn in rm_iface.connections:
114 rm_node = self.ec.get_resource(conn)
115 if rm_node.rtype() == "OMFNode" and rm_node.get('hostname'):
116 if rm_iface.state < ResourceState.PROVISIONED or \
117 rm_node.state < ResourceState.READY:
119 couple = [rm_node.get('hostname'), rm_iface.get('alias')]
126 """ Deploy the RM. It means : Get the xmpp client and send messages
127 using OMF 5.4 protocol to configure the channel.
128 It becomes DEPLOYED after sending messages to configure the channel
131 if not self._omf_api :
132 self._omf_api = OMFAPIFactory.get_api(self.get('xmppSlice'),
133 self.get('xmppHost'), self.get('xmppPort'),
134 self.get('xmppPassword'), exp_id = self.exp_id)
136 if not self._omf_api :
137 msg = "Credentials are not initialzed. XMPP Connections impossible"
139 raise RuntimeError, msg
141 if not self.get('channel'):
142 msg = "Channel's value is not initialized"
144 raise RuntimeError, msg
146 self._nodes_guid = self._get_target(self._connections)
148 if self._nodes_guid == "reschedule" :
149 self.ec.schedule("2s", self.deploy)
152 for couple in self._nodes_guid:
153 #print "Couple node/alias : " + couple[0] + " , " + couple[1]
154 attrval = self.get('channel')
155 attrname = "net/%s/%s" % (couple[1], 'channel')
156 self._omf_api.configure(couple[0], attrname, attrval)
157 except AttributeError:
158 msg = "Credentials are not initialzed. XMPP Connections impossible"
162 super(OMFChannel, self).deploy()
165 """ Clean the RM at the end of the experiment and release the API
170 OMFAPIFactory.release_api(self.get('xmppSlice'),
171 self.get('xmppHost'), self.get('xmppPort'),
172 self.get('xmppPassword'), exp_id = self.exp_id)
175 err = traceback.format_exc()
178 super(OMFChannel, self).release()