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Package twisted ::
Package persisted ::
Module styles ::
Class Versioned
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Class Versioned
- Known Subclasses:
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BuilderStatus,
BuildMaster,
BuildStatus,
BuildStepStatus,
Dispatcher
This type of object is persisted with versioning information.
I have a single class attribute, the int persistenceVersion. After I
am unserialized (and styles.doUpgrade() is called),
self.upgradeToVersionX() will be called for each version upgrade I must
undergo.
For example, if I serialize an instance of a Foo(Versioned) at version
4 and then unserialize it when the code is at version 9, the calls:
self.upgradeToVersion5()
self.upgradeToVersion6()
self.upgradeToVersion7()
self.upgradeToVersion8()
self.upgradeToVersion9()
will be made. If any of these methods are undefined, a warning message
will be printed.
| Method Summary |
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__getstate__(self,
dict)
Get state, adding a version number to it on its way out. |
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__setstate__(self,
state)
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versionUpgrade(self)
(internal) Do a version upgrade. |
__getstate__(self,
dict=None)
Get state, adding a version number to it on its way out.
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versionUpgrade(self)
(internal) Do a version upgrade.
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__implemented__
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- Type:
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Implements
- Value:
<implementedBy twisted.persisted.styles.Versioned>
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__providedBy__
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- Type:
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ClassProvides
- Value:
<zope.interface.declarations.ClassProvides object at 0x4062396c>
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__provides__
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- Type:
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ClassProvides
- Value:
<zope.interface.declarations.ClassProvides object at 0x4062396c>
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persistenceForgets
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- Type:
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tuple
- Value:
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persistenceVersion
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- Type:
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int
- Value:
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