584571c3d8
Garbage collection is triggered by io.murano.system.GC.collect() static method. Garbage collector destroys all object that are not reachable anymore. GC can handle objects with cross-references and isolated object graphs. When portion of object model becomes not reachable it destroyed in predictable order such that child objects get destroyed before their parents and, when possible, before objects that are subscribed to their destruction notifications. Internally, both pre-deployment garbage collection (that was done by comparision of ``Objects`` and ``ObjectsCopy``) and post-deployment orphan object collection are now done through the new GC. MuranoPL GC utilizes Python GC to track and collect objects. The main idea is to make ObjectStore have weak links only and prevent hard links in other dsl places so that only links between objects remain. Then prevent Python GC to automatically delete objects that are not used anymore and use gc.collect() to obtain a list of objects that are both not reachable and cannot be destroyed and then destroy them in the correct order. Targets-blueprint: dependency-driven-resource-deallocation Closes-Bug: #1619635 Closes-Bug: #1597747 Change-Id: I653d8f71f003afa0a1ea588c9d14198571f5ad14
75 lines
2.4 KiB
Python
75 lines
2.4 KiB
Python
# Copyright (c) 2014 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import inspect
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import os.path
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import eventlet.debug
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from murano.tests.unit import base
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from murano.tests.unit.dsl.foundation import runner
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from murano.tests.unit.dsl.foundation import test_package_loader
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class DslTestCase(base.MuranoTestCase):
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def setUp(self):
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super(DslTestCase, self).setUp()
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directory = os.path.join(os.path.dirname(
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inspect.getfile(self.__class__)), 'meta')
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root_meta_directory = os.path.join(
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os.path.dirname(__file__), '../../../../../meta')
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sys_package_loader = test_package_loader.TestPackageLoader(
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os.path.join(root_meta_directory, 'io.murano/Classes'),
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'io.murano')
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self._package_loader = test_package_loader.TestPackageLoader(
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directory, 'tests', sys_package_loader)
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self._functions = {}
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self.register_function(
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lambda data: self._traces.append(data), 'trace')
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self._traces = []
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self._runners = []
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eventlet.debug.hub_exceptions(False)
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def new_runner(self, model):
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r = runner.Runner(model, self.package_loader, self._functions)
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self._runners.append(r)
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return r
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def tearDown(self):
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super(DslTestCase, self).tearDown()
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for r in self._runners:
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r.executor.finalize(r.root)
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@property
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def traces(self):
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return self._traces
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@traces.deleter
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def traces(self):
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self._traces = []
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@property
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def package_loader(self):
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return self._package_loader
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def register_function(self, func, name):
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self._functions[name] = func
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@staticmethod
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def find_attribute(model, obj_id, obj_type, name):
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for entry in model['Attributes']:
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if tuple(entry[:3]) == (obj_id, obj_type, name):
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return entry[3]
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