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#!/usr/bin/env python
#
# Copyright (C) 2017 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 webapp2
from webapp.src.proto import model
from google.appengine.api import taskqueue
class PeriodicScheduler(webapp2.RequestHandler):
"""Main class for /tasks/schedule servlet.
This class creates a task, which creates schedules, in given period.
"""
def get(self):
"""Enqueues a scheduling task if scheduler is enabled."""
schedule_control = model.ScheduleControlModel.query()
schedule_control_dataset = schedule_control.fetch()
enabled = True
if schedule_control_dataset:
for schedule_control_data_tuple in schedule_control_dataset:
if (not schedule_control_data_tuple.schedule_name or
schedule_control_data_tuple.schedule_name == "global"):
enabled = schedule_control_data_tuple.enabled
if not enabled:
self.response.write(
"<pre>\nScheduler not enabled.\n</pre>")
return
task = taskqueue.add(
url="/worker/schedule_handler",
target="worker",
queue_name="queue-schedule",
transactional=False
)
self.response.write(
"<pre>\nScheduling task is enqueued. ETA {}\n</pre>".format(
task.eta))
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