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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Class Poco::UniqueExpireStrategy</title>
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<meta name="author" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="publisher" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="copyright" content="Copyright (c) 2009, Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="language" content="en"/>
<meta name="date" content="2009-11-24"/>
<meta name="generator" content="PocoDoc"/>
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<div class="header">
<h1 class="namespace"><a href="Poco.html" class="namespace">Poco</a></h1>
<h1 class="template">template < class TKey, class TValue ></h1>
<h1 class="symbol">class UniqueExpireStrategy</h1>
</div>
<div class="body">
<p>
<b>Library:</b> Foundation<br />
<b>Package:</b> Cache<br />
<b>Header:</b> Poco/UniqueExpireStrategy.h</p>
<h2>Description</h2>
<div class="description">
<p>An <a href="Poco.UniqueExpireStrategy.html" title="class Poco::UniqueExpireStrategy">UniqueExpireStrategy</a> implements time based expiration of cache entries. In contrast to <a href="Poco.ExpireStrategy.html" title="class Poco::ExpireStrategy">ExpireStrategy</a> which only allows to set a per cache expiration value, it allows to define expiration per CacheEntry. Each TValue object must thus offer the following method: </p>
<p></p>
<pre>const Poco::Timestamp& getExpiration() const;
</pre>
<p>which returns the absolute timepoint when the entry will be invalidated. </p>
</div>
<h2>Inheritance</h2>
<p><b>Direct Base Classes: </b>AbstractStrategy < TKey, TValue ></p>
<p><b>All Base Classes: </b>AbstractStrategy < TKey, TValue ></p>
<h2>Member Summary</h2>
<p><b>Member Functions: </b><a href="Poco.UniqueExpireStrategy.html#12028" title="Poco::UniqueExpireStrategy::onAdd()">onAdd</a>, <a href="Poco.UniqueExpireStrategy.html#12038" title="Poco::UniqueExpireStrategy::onClear()">onClear</a>, <a href="Poco.UniqueExpireStrategy.html#12035" title="Poco::UniqueExpireStrategy::onGet()">onGet</a>, <a href="Poco.UniqueExpireStrategy.html#12041" title="Poco::UniqueExpireStrategy::onIsValid()">onIsValid</a>, <a href="Poco.UniqueExpireStrategy.html#12032" title="Poco::UniqueExpireStrategy::onRemove()">onRemove</a>, <a href="Poco.UniqueExpireStrategy.html#12044" title="Poco::UniqueExpireStrategy::onReplace()">onReplace</a></p>
<h2>Types</h2>
<h3><a name="12023">ConstIndexIterator</a></h3>
<p class="decl">typedef typename TimeIndex::const_iterator <a href="Poco.UniqueExpireStrategy.html#12023" title="Poco::UniqueExpireStrategy::ConstIndexIterator">ConstIndexIterator</a>;</p>
<div class="description">
<p></p>
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<h3><a name="12022">IndexIterator</a></h3>
<p class="decl">typedef typename TimeIndex::iterator <a href="Poco.UniqueExpireStrategy.html#12022" title="Poco::UniqueExpireStrategy::IndexIterator">IndexIterator</a>;</p>
<div class="description">
<p></p>
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<h3><a name="12025">Iterator</a></h3>
<p class="decl">typedef typename Keys::iterator <a href="Poco.UniqueExpireStrategy.html#12025" title="Poco::UniqueExpireStrategy::Iterator">Iterator</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="12024">Keys</a></h3>
<p class="decl">typedef std::map < TKey, <a href="Poco.UniqueExpireStrategy.html#12022" title="Poco::UniqueExpireStrategy::IndexIterator">IndexIterator</a> > <a href="Poco.UniqueExpireStrategy.html#12024" title="Poco::UniqueExpireStrategy::Keys">Keys</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="12021">TimeIndex</a></h3>
<p class="decl">typedef std::multimap < <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a>, TKey > <a href="Poco.UniqueExpireStrategy.html#12021" title="Poco::UniqueExpireStrategy::TimeIndex">TimeIndex</a>;</p>
<div class="description">
<p></p>
</div>
<h2>Constructors</h2>
<h3><a name="12026">UniqueExpireStrategy</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.UniqueExpireStrategy.html" title="class Poco::UniqueExpireStrategy">UniqueExpireStrategy</a>();</p>
<div class="description">
<p>Create an unique expire strategy. </p>
</div>
<h2>Destructor</h2>
<h3><a name="12027">~UniqueExpireStrategy</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">~<a href="Poco.UniqueExpireStrategy.html" title="class Poco::UniqueExpireStrategy">UniqueExpireStrategy</a>();</p>
<div class="description">
<p></p>
</div>
<h2>Member Functions</h2>
<h3><a name="12028">onAdd</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void onAdd(<br /> const void * param217,<br /> const <a href="Poco.KeyValueArgs.html" title="class Poco::KeyValueArgs">KeyValueArgs</a> < TKey,<br /> TValue > & args<br />);</p>
<div class="description">
<p></p>
</div>
<h3><a name="12038">onClear</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void onClear(<br /> const void * param220,<br /> const <a href="Poco.EventArgs.html" title="class Poco::EventArgs">EventArgs</a> & args<br />);</p>
<div class="description">
<p></p>
</div>
<h3><a name="12035">onGet</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void onGet(<br /> const void * param219,<br /> const TKey & key<br />);</p>
<div class="description">
<p></p>
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<h3><a name="12041">onIsValid</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void onIsValid(<br /> const void * param221,<br /> <a href="Poco.ValidArgs.html" title="class Poco::ValidArgs">ValidArgs</a> < TKey > & args<br />);</p>
<div class="description">
<p></p>
</div>
<h3><a name="12032">onRemove</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void onRemove(<br /> const void * param218,<br /> const TKey & key<br />);</p>
<div class="description">
<p></p>
</div>
<h3><a name="12044">onReplace</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void onReplace(<br /> const void * param222,<br /> std::set < TKey > & elemsToRemove<br />);</p>
<div class="description">
<p></p>
</div>
<h2>Variables</h2>
<h3><a name="12048">_keyIndex</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.UniqueExpireStrategy.html#12021" title="Poco::UniqueExpireStrategy::TimeIndex">TimeIndex</a> _keyIndex;</p>
<div class="description">
<p>Maps time to key value </p>
</div>
<h3><a name="12047">_keys</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.UniqueExpireStrategy.html#12024" title="Poco::UniqueExpireStrategy::Keys">Keys</a> _keys;</p>
<div class="description">
<p>For faster replacement of keys, the iterator points to the _keyIndex map </p>
</div>
<p class="footer">POCO C++ Libraries 1.3.6-all<br />
Copyright © 2009, <a href="http://pocoproject.org/" target="_blank">Applied Informatics Software Engineering GmbH and Contributors</a></p>
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