159 lines
7.1 KiB
HTML
159 lines
7.1 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>Architectural Principles — plone.app.discussion v1.0b4 documentation</title>
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<link rel="top" title="plone.app.discussion v1.0b4 documentation" href="index.html" />
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<link rel="next" title="Design Notes" href="design.html" />
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<li><a href="index.html">plone.app.discussion v1.0b4 documentation</a> »</li>
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<div class="body">
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<div class="section" id="architectural-principles">
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<h1>Architectural Principles<a class="headerlink" href="#architectural-principles" title="Permalink to this headline">¶</a></h1>
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<p>This document outlines architectural principles used in the design of
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plone.app.discussion.</p>
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<blockquote>
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<dl class="docutils">
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<dt><strong>Discussion items have a portal_type</strong></dt>
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<dd>This makes it easier to search for them and manage them using existing
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CMF and Plone UI constructs.</dd>
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<dt><strong>Discussion items are cataloged</strong></dt>
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<dd>It is be possible to search for discussion items like any other type of
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content.</dd>
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<dt><strong>Discussion items are subject to workflow and permission</strong></dt>
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<dd>Moderation, anonymous commenting, and auto approve/reject should be
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handled using workflow states, automatic and manual transitions, and
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permissions.</dd>
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<dt><strong>Discussion items are light weight objects</strong></dt>
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<dd>Discussion item objects are as light weight as possible.
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Ideally, a discussion item should be as lightweight as a catalog brain.
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This may mean that we forego convenience base classes and re-implement
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certain interfaces. Comments should not provide the full set of dublin
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core metadata, though custom indexers can be used to provide values for
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standard catalog indexes.</dd>
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<dt><strong>Optimise for retrival speed</strong></dt>
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<dd>HTML filtering and other processing should happen on save, not on render,
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to make rendering quick.</dd>
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<dt><strong>Settings are stored using plone.registry</strong></dt>
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<dd>Any global setting should be stored in plone.registry records</dd>
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<dt><strong>Forms are constructed using extensible z3c.form forms</strong></dt>
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<dd>This allows plugins (such as spam protection algorithms) to provide
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additional validation</dd>
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<dt><strong>Discussion items are stored in a BTree container</strong></dt>
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<dd>This allows faster lookup and manipulation</dd>
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<dt><strong>Discussion items are accessed using a dict-like interface</strong></dt>
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<dd>This makes iteration and manipulation more natural. Even if comments are
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not stored threaded, the dict interface should act as if they are, i.e.
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calling items() on a comment should return the replies to that comment
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(in order).</dd>
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<dt><strong>Discussion items are retrieved in reverse creation date order</strong></dt>
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<dd>Discussion items do not need to support explicit ordering. They should
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always be retrieved in reverse creation date order (most recent for).
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They can be stored with keys so that this is always true.</dd>
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<dt><strong>Discussion items do not need readable ids</strong></dt>
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<dd>Ids can be based on the creation date.</dd>
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<dt><strong>Discussion items send events</strong></dt>
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<dd>The usual zope.lifecycleevent and zope.container events are fired when
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discussion items are added, removed, or modified.</dd>
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</dl>
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</blockquote>
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</div>
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</div>
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</div>
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</div>
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<div class="sphinxsidebar">
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<div class="sphinxsidebarwrapper">
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<h4>Previous topic</h4>
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<p class="topless"><a href="index.html"
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title="previous chapter">Welcome to plone.app.discussion’s documentation!</a></p>
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<h4>Next topic</h4>
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<p class="topless"><a href="design.html"
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title="next chapter">Design Notes</a></p>
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<h3>This Page</h3>
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<ul class="this-page-menu">
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<li><a href="_sources/architecture.txt"
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rel="nofollow">Show Source</a></li>
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<h3>Quick search</h3>
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Enter search terms or a module, class or function name.
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</div>
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<div class="related">
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<h3>Navigation</h3>
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<ul>
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<li class="right" style="margin-right: 10px">
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<a href="genindex.html" title="General Index"
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>index</a></li>
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<li class="right" >
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<a href="modindex.html" title="Global Module Index"
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>modules</a> |</li>
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<li class="right" >
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|||
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<a href="design.html" title="Design Notes"
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|||
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>next</a> |</li>
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<li class="right" >
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|||
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<a href="index.html" title="Welcome to plone.app.discussion’s documentation!"
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|||
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>previous</a> |</li>
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|||
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<li><a href="index.html">plone.app.discussion v1.0b4 documentation</a> »</li>
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</ul>
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</div>
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<div class="footer">
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© Copyright 2010, Timo Stollenwerk.
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Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 0.6.4.
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</div>
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</body>
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</html>
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