+#
+# NEPI, a framework to manage network experiments
+# Copyright (C) 2013 INRIA
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+# Author: Alina Quereilhac <alina.quereilhac@inria.fr>
+
+from nepi.execution.attribute import Attribute, Flags, Types
+from nepi.execution.trace import Trace, TraceAttr
+from nepi.execution.resource import ResourceManager, clsinit_copy, ResourceState, \
+ ResourceAction
+from nepi.resources.linux.application import LinuxApplication
+from nepi.resources.linux.ccn.ccnr import LinuxCCNR
+from nepi.resources.linux.node import OSType
+
+from nepi.util.sshfuncs import ProcStatus
+from nepi.util.timefuncs import strfnow, strfdiff
+import os
+
+reschedule_delay = "0.5s"
+
+@clsinit_copy
+class LinuxCCNR(LinuxApplication):
+ _rtype = "LinuxCCNContent"
+
+ @classmethod
+ def _register_attributes(cls):
+ content_name = Attribute("contentName",
+ "The name of the content to publish (e.g. ccn:/VIDEO) ",
+ flags = Flags.ExecReadOnly)
+ content = Attribute("content",
+ "The content to publish. It can be a path to a file or plain text ",
+ flags = Flags.ExecReadOnly)
+
+
+ cls._register_attribute(content_name)
+ cls._register_attribute(content)
+
+ @classmethod
+ def _register_traces(cls):
+ log = Trace("log", "CCND log output")
+
+ cls._register_trace(log)
+
+ def __init__(self, ec, guid):
+ super(LinuxCCNContent, self).__init__(ec, guid)
+
+ @property
+ def ccnr(self):
+ ccnr = self.get_connected(LinuxCCNR.rtype())
+ if ccnr: return ccnr[0]
+ return None
+
+ def deploy(self):
+ if not self.get("command"):
+ self.set("command", self._default_command)
+
+ if not self.get("env"):
+ self.set("env", self._default_environment)
+
+ # Wait until associated ccnd is provisioned
+ ccnr = self.ccnr
+
+ if not ccnr or ccnr.state < ResourceState.STARTED:
+ self.ec.schedule(reschedule_delay, self.deploy)
+ else:
+ # Add a start after condition so CCNR will not start
+ # before CCND does
+ self.ec.register_condition(self.guid, ResourceAction.START,
+ ccnd.guid, ResourceState.STARTED)
+
+ # Invoke the actual deployment
+ super(LinuxCCNContent, self).deploy()
+
+ @property
+ def _default_command(self):
+ return "ccnseqwriter -r %s " % self.get("contentName")
+
+ @property
+ def _default_environment(self):
+ env = "PATH=$PATH:${EXP_HOME}/ccnx/bin "
+ return env
+
+ def valid_connection(self, guid):
+ # TODO: Validate!
+ return True
+