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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::UniqueAccessExpireLRUCache</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<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"/>
<link rel="stylesheet" href="css/styles.css" type="text/css"/>
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<div class="header">
<h1 class="namespace"><a href="Poco.html" class="namespace">Poco</a></h1>
<h1 class="template">template &lt; class TKey, class TValue &gt;</h1>
<h1 class="symbol">class UniqueAccessExpireLRUCache</h1>
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<p>
<b>Library:</b> Foundation<br />
<b>Package:</b> Cache<br />
<b>Header:</b> Poco/UniqueAccessExpireLRUCache.h</p>
<h2>Description</h2>
<div class="description">
<p>A <a href="Poco.UniqueAccessExpireLRUCache.html" title="class Poco::UniqueAccessExpireLRUCache">UniqueAccessExpireLRUCache</a> combines LRU caching and time based per entry expire caching. One can define for each cache entry a seperate timepoint but also limit the size of the cache (per default: 1024). Each TValue object must thus offer the following method: </p>
<p></p>
<pre>const Poco::Timespan&amp; getTimeout() const;
</pre>
<p>which returns the relative timespan for how long the entry should be valid without being accessed! The absolute expire timepoint is calculated as now() + getTimeout(). Accessing an object will update this absolute expire timepoint. You can use the <a href="Poco.AccessExpirationDecorator.html" title="class Poco::AccessExpirationDecorator">Poco::AccessExpirationDecorator</a> to add the getExpiration method to values that do not have a getExpiration function. </p>
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<h2>Inheritance</h2>
<p><b>Direct Base Classes: </b>AbstractCache&nbsp;&lt;&nbsp;TKey,&nbsp;TValue,&nbsp;StrategyCollection&nbsp;&lt;&nbsp;TKey,&nbsp;TValue&nbsp;&gt;&nbsp;&gt;</p>
<p><b>All Base Classes: </b>AbstractCache&nbsp;&lt;&nbsp;TKey,&nbsp;TValue,&nbsp;StrategyCollection&nbsp;&lt;&nbsp;TKey,&nbsp;TValue&nbsp;&gt;&nbsp;&gt;</p>
<h2>Constructors</h2>
<h3><a name="11968">UniqueAccessExpireLRUCache</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.UniqueAccessExpireLRUCache.html" title="class Poco::UniqueAccessExpireLRUCache">UniqueAccessExpireLRUCache</a>(<br />&nbsp;&nbsp;&nbsp;&nbsp;long cacheSize = 1024<br />);</p>
<div class="description">
<p></p>
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<h2>Destructor</h2>
<h3><a name="11970">~UniqueAccessExpireLRUCache</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">~<a href="Poco.UniqueAccessExpireLRUCache.html" title="class Poco::UniqueAccessExpireLRUCache">UniqueAccessExpireLRUCache</a>();</p>
<div class="description">
<p></p>
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<p class="footer">POCO C++ Libraries 1.3.6-all<br />
Copyright &copy; 2009, <a href="http://pocoproject.org/" target="_blank">Applied Informatics Software Engineering GmbH and Contributors</a></p>

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