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# Copyright 2012 Hewlett-Packard Development Company, L.P.
# Copyright 2013 OpenStack Foundation
#
# 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 logging
import threading
import time
from paste import httpserver
import webob
from webob import dec
class WebApp(threading.Thread):
log = logging.getLogger("zuul.WebApp")
def __init__(self, scheduler, port=8001, cache_expiry=1):
threading.Thread.__init__(self)
self.scheduler = scheduler
self.port = port
self.cache_expiry = cache_expiry
self.cache_time = 0
self.cache = None
self.daemon = True
self.server = httpserver.serve(dec.wsgify(self.app), host='0.0.0.0',
port=self.port, start_loop=False)
def run(self):
self.server.serve_forever()
def stop(self):
self.server.server_close()
def app(self, request):
if request.path != '/status.json':
raise webob.exc.HTTPNotFound()
if (not self.cache or
(time.time() - self.cache_time) > self.cache_expiry):
try:
self.cache = self.scheduler.formatStatusJSON()
# Call time.time() again because formatting above may take
# longer than the cache timeout.
self.cache_time = time.time()
except:
self.log.exception("Exception formatting status:")
raise
response = webob.Response(body=self.cache,
content_type='application/json')
response.headers['Access-Control-Allow-Origin'] = '*'
response.last_modified = self.cache_time
return response
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