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>
20 from nepi.execution.attribute import Attribute, Flags, Types
21 from nepi.execution.resource import clsinit_copy, ResourceState, \
23 from nepi.resources.linux.ccn.ccnapplication import LinuxCCNApplication
24 from nepi.resources.linux.ccn.ccnr import LinuxCCNR
25 from nepi.util.timefuncs import tnow
30 class LinuxCCNContent(LinuxCCNApplication):
31 _rtype = "LinuxCCNContent"
34 def _register_attributes(cls):
35 content_name = Attribute("contentName",
36 "The name of the content to publish (e.g. ccn:/VIDEO) ",
37 flags = Flags.ExecReadOnly)
39 content = Attribute("content",
40 "The content to publish. It can be a path to a file or plain text ",
41 flags = Flags.ExecReadOnly)
43 cls._register_attribute(content_name)
44 cls._register_attribute(content)
46 def __init__(self, ec, guid):
47 super(LinuxCCNContent, self).__init__(ec, guid)
48 self._home = "content-%s" % self.guid
52 ccnr = self.get_connected(LinuxCCNR.rtype())
53 if ccnr: return ccnr[0]
58 if self.ccnr: return self.ccnr.node
62 if not self.ccnr or self.ccnr.state < ResourceState.READY:
63 self.debug("---- RESCHEDULING DEPLOY ---- node state %s " % self.node.state )
65 reschedule_delay = "0.5s"
66 # ccnr needs to wait until ccnd is deployed and running
67 self.ec.schedule(reschedule_delay, self.deploy)
69 command = self._start_command
70 env = self._environment
72 self.set("command", command)
75 # set content to stdin, so the content will be
76 # uploaded during provision
77 self.set("stdin", self.get("content"))
79 self.info("Deploying command '%s' " % command)
81 self.node.mkdir(self.app_home)
86 # We want to make sure the content is published
87 # before the experiment starts.
88 # Run the command as a bash script in the background,
89 # in the host ( but wait until the command has
90 # finished to continue )
91 self.execute_command(command, env)
93 self.debug("----- READY ---- ")
94 self._ready_time = tnow()
95 self._state = ResourceState.READY
98 if self._state == ResourceState.READY:
99 command = self.get("command")
100 self.info("Starting command '%s'" % command)
102 self._start_time = tnow()
103 self._state = ResourceState.STARTED
105 msg = " Failed to execute command '%s'" % command
106 self.error(msg, out, err)
107 self._state = ResourceState.FAILED
108 raise RuntimeError, msg
115 def _start_command(self):
116 return "ccnseqwriter -r %s < %s" % (self.get("contentName"),
117 os.path.join(self.app_home, 'stdin'))
119 def valid_connection(self, guid):