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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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
#
"""
PROTON-1709 [python] ApplicationEvent causing memory growth
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import gc
import platform
import threading
import unittest
import proton
from proton.handlers import MessagingHandler
from proton.reactor import Container, ApplicationEvent, EventInjector
class Program(MessagingHandler):
def __init__(self, injector):
self.injector = injector
self.counter = 0
self.on_start_ = threading.Event()
def on_reactor_init(self, event):
event.reactor.selectable(self.injector)
self.on_start_.set()
def on_count_up(self, event):
self.counter += 1
gc.collect()
def on_done(self, event):
event.subject.stop()
class Proton1709Test(unittest.TestCase):
@unittest.skipIf(platform.system() == 'Windows', "TODO jdanek: Test is broken on Windows")
def test_application_event_no_object_leaks(self):
event_types_count = len(proton.EventType.TYPES)
injector = EventInjector()
p = Program(injector)
c = Container(p)
t = threading.Thread(target=c.run)
t.start()
p.on_start_.wait()
object_counts = []
gc.collect()
object_counts.append(len(gc.get_objects()))
for i in range(100):
injector.trigger(ApplicationEvent("count_up"))
gc.collect()
object_counts.append(len(gc.get_objects()))
self.assertEqual(len(proton.EventType.TYPES), event_types_count + 1)
injector.trigger(ApplicationEvent("done", subject=c))
self.assertEqual(len(proton.EventType.TYPES), event_types_count + 2)
t.join()
gc.collect()
object_counts.append(len(gc.get_objects()))
self.assertEqual(p.counter, 100)
self.assertTrue(object_counts[1] - object_counts[0] <= 220,
"Object counts should not be increasing too fast: {0}".format(object_counts))
self.assertTrue(object_counts[2] - object_counts[0] <= 10,
"No objects should be leaking at the end: {0}".format(object_counts))
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