mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-12-23 22:52:25 +00:00
133 lines
4.4 KiB
Python
133 lines
4.4 KiB
Python
#!/usr/bin/env python
|
|
#
|
|
# Copyright (C) 2016 GNS3 Technologies Inc.
|
|
#
|
|
# 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/>.
|
|
|
|
import os
|
|
import aiohttp
|
|
import asyncio
|
|
from contextlib import contextmanager
|
|
|
|
from ..notification_queue import NotificationQueue
|
|
|
|
|
|
class Notification:
|
|
"""
|
|
Manage notification for the controller
|
|
"""
|
|
|
|
def __init__(self, controller):
|
|
self._controller = controller
|
|
self._listeners = {}
|
|
|
|
@contextmanager
|
|
def queue(self, project):
|
|
"""
|
|
Get a queue of notifications
|
|
|
|
Use it with Python with
|
|
"""
|
|
queue = NotificationQueue()
|
|
self._listeners.setdefault(project.id, set())
|
|
self._listeners[project.id].add(queue)
|
|
yield queue
|
|
self._listeners[project.id].remove(queue)
|
|
|
|
def project_has_listeners(self, project):
|
|
"""
|
|
:param project_id: Project object
|
|
:returns: True if client listen this project
|
|
"""
|
|
return project.id in self._listeners and len(self._listeners[project.id]) > 0
|
|
|
|
@asyncio.coroutine
|
|
def dispatch(self, action, event, compute_id):
|
|
"""
|
|
Notification received from compute node. Send it directly
|
|
to clients or process it
|
|
|
|
:param action: Action name
|
|
:param event: Event to send
|
|
:param compute_id: Compute id of the sender
|
|
"""
|
|
if action == "node.updated":
|
|
try:
|
|
# Update controller node data and send the event node.updated
|
|
project = self._controller.get_project(event["project_id"])
|
|
node = project.get_node(event["node_id"])
|
|
yield from node.parse_node_response(event)
|
|
|
|
self.emit("node.updated", node.__json__())
|
|
except (aiohttp.web.HTTPNotFound, aiohttp.web.HTTPForbidden): # Project closing
|
|
return
|
|
elif action == "ping":
|
|
event["compute_id"] = compute_id
|
|
self.emit(action, event)
|
|
else:
|
|
self.emit(action, event)
|
|
|
|
def emit(self, action, event):
|
|
"""
|
|
Send a notification to clients scoped by projects
|
|
|
|
:param action: Action name
|
|
:param event: Event to send
|
|
"""
|
|
|
|
# If use in tests for documentation we save a sample
|
|
if os.environ.get("PYTEST_BUILD_DOCUMENTATION") == "1":
|
|
os.makedirs("docs/api/notifications", exist_ok=True)
|
|
try:
|
|
import json
|
|
data = json.dumps(event, indent=4, sort_keys=True)
|
|
if "MagicMock" not in data:
|
|
with open(os.path.join("docs/api/notifications", action + ".json"), 'w+') as f:
|
|
f.write(data)
|
|
except TypeError: # If we receive a mock as an event it will raise TypeError when using json dump
|
|
pass
|
|
|
|
if "project_id" in event:
|
|
self._send_event_to_project(event["project_id"], action, event)
|
|
else:
|
|
self._send_event_to_all(action, event)
|
|
|
|
def _send_event_to_project(self, project_id, action, event):
|
|
"""
|
|
Send an event to all the client listening for notifications for
|
|
this project
|
|
|
|
:param project: Project where we need to send the event
|
|
:param action: Action name
|
|
:param event: Event to send
|
|
"""
|
|
try:
|
|
project_listeners = self._listeners[project_id]
|
|
except KeyError:
|
|
return
|
|
for listener in project_listeners:
|
|
listener.put_nowait((action, event, {}))
|
|
|
|
def _send_event_to_all(self, action, event):
|
|
"""
|
|
Send an event to all the client listening for notifications on all
|
|
projects
|
|
|
|
:param action: Action name
|
|
:param event: Event to send
|
|
"""
|
|
for project_listeners in self._listeners.values():
|
|
for listener in project_listeners:
|
|
listener.put_nowait((action, event, {}))
|