| # Copyright (C) 2010 Google Inc. All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: |
| # |
| # * Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # * Redistributions in binary form must reproduce the above |
| # copyright notice, this list of conditions and the following disclaimer |
| # in the documentation and/or other materials provided with the |
| # distribution. |
| # * Neither the name of Google Inc. nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| from datetime import datetime |
| |
| from google.appengine.ext import db |
| from google.appengine.ext import webapp |
| |
| from model.queues import Queue |
| |
| |
| class NextPatch(webapp.RequestHandler): |
| # FIXME: This should probably be a post, or an explict lock_patch |
| # since GET requests shouldn't really modify the datastore. |
| def get(self, queue_name): |
| queue = Queue.queue_with_name(queue_name) |
| if not queue: |
| self.error(404) |
| return |
| # FIXME: Patch assignment should probably move into Queue. |
| patch_id = db.run_in_transaction(self._assign_patch, queue.active_work_items().key(), queue.work_items().item_ids) |
| if not patch_id: |
| self.error(404) |
| return |
| self.response.out.write(patch_id) |
| |
| @staticmethod |
| def _assign_patch(key, work_item_ids): |
| now = datetime.now() |
| active_work_items = db.get(key) |
| active_work_items.deactivate_expired(now) |
| next_item = active_work_items.next_item(work_item_ids, now) |
| active_work_items.put() |
| return next_item |
