rename src/nepi/ into just nepi/

[nepi.git] / nepi / resources / linux / ccn / ccncontent.py

diff --git a/nepi/resources/linux/ccn/ccncontent.py b/nepi/resources/linux/ccn/ccncontent.py
new file mode 100644 (file)
index 0000000..da8c2ab
--- /dev/null
+++ b/nepi/resources/linux/ccn/ccncontent.py
@@ -0,0 +1,150 @@
+#
+#    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 version 2 as
+#    published by the Free Software Foundation;
+#
+#    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.resource import clsinit_copy, ResourceState, \
+    ResourceAction
+from nepi.resources.linux.application import LinuxApplication
+from nepi.resources.linux.ccn.ccnr import LinuxCCNR
+from nepi.util.timefuncs import tnow
+
+import os
+
+@clsinit_copy
+class LinuxCCNContent(LinuxApplication):
+    _rtype = "linux::CCNContent"
+
+    @classmethod
+    def _register_attributes(cls):
+        content_name = Attribute("contentName",
+                "The name of the content to publish (e.g. ccn:/VIDEO) ",
+                flags = Flags.Design)
+
+        content = Attribute("content",
+                "The content to publish. It can be a path to a file or plain text ",
+                flags = Flags.Design)
+
+        scope = Attribute("scope",
+                "Use the given scope on the start-write request (if -r specified). "
+                "scope can be 1 (local), 2 (neighborhood), or 3 (unlimited). "
+                "Note that a scope of 3 is encoded as the absence of any scope in the interest. ",
+                type = Types.Integer,
+                default = 1,
+                flags = Flags.Design)
+
+        cls._register_attribute(content_name)
+        cls._register_attribute(content)
+        cls._register_attribute(scope)
+
+    def __init__(self, ec, guid):
+        super(LinuxCCNContent, self).__init__(ec, guid)
+        self._home = "content-%s" % self.guid
+        
+    @property
+    def ccnr(self):
+        ccnr = self.get_connected(LinuxCCNR.get_rtype())
+        if ccnr: return ccnr[0]
+        return None
+
+    @property
+    def ccnd(self):
+        if self.ccnr: return self.ccnr.ccnd
+        return None
+
+    @property
+    def node(self):
+        if self.ccnr: return self.ccnr.node
+        return None
+
+    def do_deploy(self):
+        if not self.ccnr or self.ccnr.state < ResourceState.READY:
+            self.debug("---- RESCHEDULING DEPLOY ---- node state %s " % self.node.state )
+            
+            # ccnr needs to wait until ccnd is deployed and running
+            self.ec.schedule(self.reschedule_delay, self.deploy)
+        else:
+            if not self.get("command"):
+                self.set("command", self._start_command)
+
+            if not self.get("env"):
+                self.set("env", self._environment)
+
+            # set content to stdin, so the content will be
+            # uploaded during provision
+            self.set("stdin", self.get("content"))
+
+            command = self.get("command")
+
+            self.info("Deploying command '%s' " % command)
+
+            self.do_discover()
+            self.do_provision()
+
+            self.set_ready()
+
+    def upload_start_command(self):
+        command = self.get("command")
+        env = self.get("env")
+
+        self.info("Uploading command '%s'" % command)
+
+        # We want to make sure the content is published
+        # before the experiment starts.
+        # Run the command as a bash script in the background, 
+        # in the host ( but wait until the command has
+        # finished to continue )
+        env = self.replace_paths(env)
+        command = self.replace_paths(command)
+
+        (out, err), proc = self.execute_command(command, 
+                env, blocking = True)
+
+        if proc.poll():
+            msg = "Failed to execute command"
+            self.error(msg, out, err)
+            raise RuntimeError(msg)
+
+    def do_start(self):
+        if self.state == ResourceState.READY:
+            command = self.get("command")
+            self.info("Starting command '%s'" % command)
+
+            self.set_started()
+        else:
+            msg = " Failed to execute command '%s'" % command
+            self.error(msg, out, err)
+            raise RuntimeError(msg)
+
+    @property
+    def _start_command(self):
+        command = ["ccnseqwriter"]
+        command.append("-r %s" % self.get("contentName"))
+        command.append("-s %d" % self.get("scope"))
+        command.append("< %s" % os.path.join(self.app_home, 'stdin'))
+
+        command = " ".join(command)
+        return command
+
+    @property
+    def _environment(self):
+        return self.ccnd.path
+       
+    def valid_connection(self, guid):
+        # TODO: Validate!
+        return True
+