http://95.179.246.60/mediawiki/index.php?action=history&feed=atom&title=How_to_dump_and_restore_an_Object 2026-05-08T12:47:00Z Revision history for this page on the wiki MediaWiki 1.39.17 http://95.179.246.60/mediawiki/index.php?title=How_to_dump_and_restore_an_Object&diff=66&oldid=prev 2025-05-03T23:26:45Z

<p>imported material</p> <p><b>New page</b></p><div><br /> &#039;&#039;&#039;TODO&#039;&#039;&#039;. Examples, understand better what really happens.<br /> <br /> &#039;&#039;&#039;Problem&#039;&#039;&#039;. I want to dump an object and store it into the filesystem the recover it when I whish it will be a proper time. How do I do ?<br /> <br /> &#039;&#039;&#039;Solution&#039;&#039;&#039;. There are several ways to solve this problem trading off simplicity and power. Let&#039;s go from the simplest to the most complex and powerful.<br /> <br /> * &#039;&#039;&#039;Solution-1&#039;&#039;&#039;. The simplest, using &lt;code&gt;ObjectFoo&gt;&gt;storeString&lt;/code&gt; or the equivalent for streams.<br /> ** +] Very easy<br /> ** +] The dump is human readable<br /> ** -] It is not intended to dump cyclic structures<br /> ** -] The internal variables of ObjectFoo are stored by position, not by name. If you change the class ObjectFoo and then try to recover and old dump you will make a mess.<br /> * &#039;&#039;&#039;Solution-2&#039;&#039;&#039;. &lt;code&gt;ReferenceStream&gt;&gt;dumpOnFile:&lt;/code&gt;<br /> ** -] more complex, it spits out a binary file<br /> ** +] restist to cycles in the data structure to dump<br /> * &#039;&#039;&#039;Solution-3&#039;&#039;&#039;. &lt;code&gt;SmartRefStream&gt;&gt;dumpOnFile:&lt;/code&gt;<br /> ** -] even more complex, larger file, binary file<br /> ** +] resist to cycles<br /> ** +] resist to moderate changes in the ObjectFoo class because internal variable are stored with name and value.</div>

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