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, \
22 ResourceAction, reschedule_delay
23 from nepi.resources.linux.application import LinuxApplication
24 from nepi.resources.linux.ccn.ccnr import LinuxCCNR
25 from nepi.util.timefuncs import tnow
30 class LinuxCCNContent(LinuxApplication):
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 scope = Attribute("scope",
44 "Use the given scope on the start-write request (if -r specified). "
45 "scope can be 1 (local), 2 (neighborhood), or 3 (unlimited). "
46 "Note that a scope of 3 is encoded as the absence of any scope in the interest. ",
49 flags = Flags.ExecReadOnly)
51 cls._register_attribute(content_name)
52 cls._register_attribute(content)
53 cls._register_attribute(scope)
55 def __init__(self, ec, guid):
56 super(LinuxCCNContent, self).__init__(ec, guid)
57 self._home = "content-%s" % self.guid
61 ccnr = self.get_connected(LinuxCCNR.rtype())
62 if ccnr: return ccnr[0]
67 if self.ccnr: return self.ccnr.ccnd
72 if self.ccnr: return self.ccnr.node
76 if not self.ccnr or self.ccnr.state < ResourceState.READY:
77 self.debug("---- RESCHEDULING DEPLOY ---- node state %s " % self.node.state )
79 # ccnr needs to wait until ccnd is deployed and running
80 self.ec.schedule(reschedule_delay, self.deploy)
83 if not self.get("command"):
84 self.set("command", self._start_command)
86 if not self.get("env"):
87 self.set("env", self._environment)
89 # set content to stdin, so the content will be
90 # uploaded during provision
91 self.set("stdin", self.get("content"))
93 command = self.get("command")
95 self.info("Deploying command '%s' " % command)
103 self.debug("----- READY ---- ")
106 def upload_start_command(self):
107 command = self.get("command")
108 env = self.get("env")
110 self.info("Uploading command '%s'" % command)
112 # We want to make sure the content is published
113 # before the experiment starts.
114 # Run the command as a bash script in the background,
115 # in the host ( but wait until the command has
116 # finished to continue )
117 env = self.replace_paths(env)
118 command = self.replace_paths(command)
120 (out, err), proc = self.execute_command(command,
121 env, blocking = True)
124 msg = "Failed to execute command"
125 self.error(msg, out, err)
126 raise RuntimeError, msg
129 if self.state == ResourceState.READY:
130 command = self.get("command")
131 self.info("Starting command '%s'" % command)
135 msg = " Failed to execute command '%s'" % command
136 self.error(msg, out, err)
140 def _start_command(self):
141 command = ["ccnseqwriter"]
142 command.append("-r %s" % self.get("contentName"))
143 command.append("-s %d" % self.get("scope"))
144 command.append("< %s" % os.path.join(self.app_home, 'stdin'))
146 command = " ".join(command)
150 def _environment(self):
151 return self.ccnd.path
153 def valid_connection(self, guid):