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#!/usr/bin/env python
#
# Copyright (C) 2018 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import datetime
import logging
import webapp2
from google.appengine.ext import ndb
from webapp.src import vtslab_status as Status
from webapp.src.proto import model
from webapp.src.utils import email_util
from webapp.src.utils import logger
DEVICE_RESPONSE_TIMEOUT_SECONDS = 300
class PeriodicDeviceHeartBeat(webapp2.RequestHandler):
"""Main class for /tasks/device_heartbeat.
Used to find lost devices and change their status properly.
Attributes:
logger: Logger class
"""
logger = logger.Logger()
def get(self):
"""Generates an HTML page based on the task schedules kept in DB."""
self.logger.Clear()
device_query = model.DeviceModel.query(
model.DeviceModel.status !=
Status.DEVICE_STATUS_DICT["no-response"])
devices = device_query.fetch()
lost_devices = [
x for x in devices
if (datetime.datetime.now() - x.timestamp
).seconds >= DEVICE_RESPONSE_TIMEOUT_SECONDS
]
devices_to_put = []
labs_to_alert = {}
for device in lost_devices:
self.logger.Println("Device[{}] is not responding.".format(
device.serial))
device.status = Status.DEVICE_STATUS_DICT["no-response"]
devices_to_put.append(device)
# sending notification
lab_query = model.LabModel.query(
model.LabModel.hostname == device.hostname)
labs = lab_query.fetch()
if labs:
lab = labs[0]
if lab.name not in labs_to_alert:
labs_to_alert[lab.name] = {}
labs_to_alert[lab.name]["_recipients"] = []
if device.hostname not in labs_to_alert[lab.name]:
labs_to_alert[lab.name][device.hostname] = []
if lab.owner not in labs_to_alert[lab.name]["_recipients"]:
labs_to_alert[lab.name]["_recipients"].append(lab.owner)
labs_to_alert[lab.name]["_recipients"].extend([
x for x in lab.admin
if x not in labs_to_alert[lab.name]["_recipients"]
])
labs_to_alert[lab.name][device.hostname].append(device.serial)
else:
logging.warning(
"Could not find a lab model for hostname {}".format(
device.hostname))
continue
if devices_to_put:
ndb.put_multi(devices_to_put)
if labs_to_alert:
email_util.send_device_notification(labs_to_alert)
self.response.write(
"<pre>\n" + "\n".join(self.logger.Get()) + "\n</pre>")
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