The controller has a streaming API

Now we need to link the hypervisor to the controller.

gns3server/hypervisor/notification_manager.py

@@ -15,60 +15,10 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import asyncio
-import psutil
-import json
 from contextlib import contextmanager
 
 
-class NotificationQueue(asyncio.Queue):
-    """
-    Queue returned by the notification manager.
-    """
-
-    def __init__(self):
-        super().__init__()
-        self._first = True
-
-    @asyncio.coroutine
-    def get(self, timeout):
-        """
-        When timeout is expire we send a ping notification with server informations
-        """
-
-        # At first get we return a ping so the client receive immediately data
-        if self._first:
-            self._first = False
-            return ("ping", self._getPing(), {})
-
-        try:
-            (action, msg, kwargs) = yield from asyncio.wait_for(super().get(), timeout)
-        except asyncio.futures.TimeoutError:
-            return ("ping", self._getPing(), {})
-        return (action, msg, kwargs)
-
-    def _getPing(self):
-        """
-        Return the content of the ping notification
-        """
-        msg = {}
-        # Non blocking call in order to get cpu usage. First call will return 0
-        msg["cpu_usage_percent"] = psutil.cpu_percent(interval=None)
-        msg["memory_usage_percent"] = psutil.virtual_memory().percent
-        return msg
-
-    @asyncio.coroutine
-    def get_json(self, timeout):
-        """
-        Get a message as a JSON
-        """
-        (action, msg, kwargs) = yield from self.get(timeout)
-        if hasattr(msg, "__json__"):
-            msg = {"action": action, "event": msg.__json__()}
-        else:
-            msg = {"action": action, "event": msg}
-        msg.update(kwargs)
-        return json.dumps(msg, sort_keys=True)
+from ..notification_queue import NotificationQueue
 
 
 class NotificationManager: