65e06f4603
This adds both thread level and process level locking to the cache index. It also adds a "pending" state to cached object collections, allowing a single instance of the CacheManager to do long-running downloads without holding a lock on the index the entire time. Change-Id: I6a0fcf0941f75fa5d78cc06eb78af6531d712162
106 lines
3.5 KiB
Python
Executable File
106 lines
3.5 KiB
Python
Executable File
#!/usr/bin/python
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# coding=utf-8
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# Copyright 2013 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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sys.path.append("../")
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import MockStackEnvironment
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sys.modules['StackEnvironment'] = sys.modules.pop('MockStackEnvironment')
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sys.modules['StackEnvironment'].StackEnvironment = sys.modules['StackEnvironment'].MockStackEnvironment
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import StackEnvironment
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import novaimagebuilder.CacheManager
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novaimagebuilder.CacheManager.StackEnvironment = StackEnvironment
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import logging
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import threading
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import multiprocessing
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logging.basicConfig(level=logging.DEBUG,
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format='%(asctime)s %(levelname)s %(name)s thread(%(threadName)s) Message: %(message)s')
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se = StackEnvironment.StackEnvironment()
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class MockOSPlugin(object):
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def __init__(self, os_ver_arch = "fedora19-x86_64", wants_iso = True ):
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self.nameverarch = os_ver_arch
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self.wantscdrom = wants_iso
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def os_ver_arch(self):
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return self.nameverarch
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def wants_iso(self):
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return self.wants_iso
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print "---- the following should do a glance and cinder upload"
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mosp = MockOSPlugin(os_ver_arch = "fedora18-x86_64", wants_iso = False)
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#mse = StackEnvironment("username","password","tenant","auth_url")
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mse = StackEnvironment.StackEnvironment()
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cm = novaimagebuilder.CacheManager.CacheManager()
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# Create our bogus entry in the cache index and set it to 0
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cm.lock_and_get_index()
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cm._set_index_value("testobjOS", "testobjname", "testloc", "0")
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cm.write_index_and_unlock()
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class UpdateThread():
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def __call__(self):
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#print "about to run 20 updates"
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for i in range(0,20):
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cm.lock_and_get_index()
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#print "--------- three lines below"
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#print "In the lock - 1 next line should always show value"
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value = cm._get_index_value("testobjOS", "testobjname", "testloc")
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#print "In the lock - 2 value %s" % (value)
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newvalue = int(value) + 1
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cm._set_index_value("testobjOS", "testobjname", "testloc", str(newvalue))
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#print "In the lock - 3 did update - leaving"
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#print "--------- three lines above"
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cm.write_index_and_unlock()
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class MultiThreadProcess():
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def __call__(self):
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#print "Here I run 20 threads"
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threads = [ ]
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for i in range (0,20):
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thread = threading.Thread(group=None, target=UpdateThread())
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threads.append(thread)
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thread.run()
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# Fork 20 copies of myself
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processes = [ ]
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for i in range(0,20):
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proc = multiprocessing.Process(group=None, target=MultiThreadProcess())
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processes.append(proc)
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proc.start()
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for proc in processes:
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proc.join()
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cm.lock_and_get_index()
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value = cm._get_index_value("testobjOS", "testobjname", "testloc")
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cm.unlock_index()
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print "Final value should be 8000 and is %s" % (value)
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# Have each process create 20 threads
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# Have each
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#cm.retrieve_and_cache_object("install-iso2", mosp, "http://repos.fedorapeople.org/repos/aeolus/imagefactory/testing/repos/rhel/imagefactory.repo",
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# True)
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