1# Copyright (C) 2009 Google Inc. All rights reserved.
2#
3# Redistribution and use in source and binary forms, with or without
4# modification, are permitted provided that the following conditions are
5# met:
6#
7#     * Redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer.
9#     * Redistributions in binary form must reproduce the above
10# copyright notice, this list of conditions and the following disclaimer
11# in the documentation and/or other materials provided with the
12# distribution.
13#     * Neither the name of Google Inc. nor the names of its
14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29import datetime
30
31from google.appengine.ext import webapp
32from google.appengine.ext.webapp import template
33
34from model.queues import Queue
35from model.queuestatus import QueueStatus
36from model.workitems import WorkItems
37
38
39class QueueBubble(object):
40    """View support class for recentstatus.html"""
41    def __init__(self, queue):
42        self._queue = queue
43        self._work_items = queue.work_items()
44        self._last_status = QueueStatus.all().filter("queue_name =", queue.name()).order("-date").get()
45
46    # FIXME: name and display_name should be replaced by a .queue() accessor.
47    def name(self):
48        return self._queue.name()
49
50    def display_name(self):
51        return self._queue.display_name()
52
53    def _last_status_date(self):
54        if not self._last_status:
55            return None
56        return self._last_status.date
57
58    def last_heard_from(self):
59        if not self._work_items:
60            return self._last_status_date()
61        return max(self._last_status_date(), self._work_items.date)
62
63    def is_alive(self):
64        if not self.last_heard_from():
65            return False
66        return self.last_heard_from() > (datetime.datetime.now() - datetime.timedelta(minutes=30))
67
68    def status_class(self):
69        if not self.is_alive():
70            return "dead"
71        if self.pending_items_count() > 1:
72            return "behind"
73        return "alive"
74
75    def status_text(self):
76        if not self._work_items:
77            return "Offline"
78        if not self._work_items.item_ids:
79            return "Idle"
80        return self._last_status.message
81
82    def pending_items_count(self):
83        if not self._work_items:
84            return 0
85        return len(self._work_items.item_ids)
86
87
88class QueuesOverview(webapp.RequestHandler):
89
90    def get(self):
91        template_values = {
92            "queues": [QueueBubble(queue) for queue in Queue.all()],
93        }
94        self.response.out.write(template.render("templates/recentstatus.html", template_values))
95