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Initial import from https://bitbucket.org/opensymphony/oscache/

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Erik C. Thauvin 2017-05-21 00:05:57 -07:00
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<title>OSCache -
Hibernate 2.1 Cache Provider
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<p>Patched version of OSCacheProvider.java originally created by Mathias Bogaert.</p>
<div class="code" style="border-style: solid; "><div class="codeHeader" style="border-bottom-style: solid; "><b>OSCacheProvider.java</b></div><div class="codeContent">
<pre class="code-java"><span class="code-keyword">import</span> java.util.Properties;
<span class="code-keyword">import</span> net.sf.hibernate.cache.Cache;
<span class="code-keyword">import</span> net.sf.hibernate.cache.CacheException;
<span class="code-keyword">import</span> net.sf.hibernate.cache.CacheProvider;
<span class="code-keyword">import</span> net.sf.hibernate.cache.Timestamper;
<span class="code-keyword">import</span> net.sf.hibernate.util.PropertiesHelper;
<span class="code-keyword">import</span> net.sf.hibernate.util.StringHelper;
<span class="code-keyword">import</span> com.opensymphony.oscache.base.CacheEntry;
<span class="code-keyword">import</span> com.opensymphony.oscache.base.Config;
/**
* Support <span class="code-keyword">for</span> OpenSymphony OSCache. This implementation assumes
* that identifiers have well-behaved &lt;tt&gt;toString()&lt;/tt&gt; methods.
*/
<span class="code-keyword">public</span> class OSCacheProvider <span class="code-keyword">implements</span> CacheProvider {
/**
* The &lt;tt&gt;OSCache&lt;/tt&gt; refresh period property suffix.
*/
<span class="code-keyword">public</span> <span class="code-keyword">static</span> <span class="code-keyword">final</span> <span class="code-object">String</span> OSCACHE_REFRESH_PERIOD = <span class="code-quote">"refresh.period"</span>;
/**
* The &lt;tt&gt;OSCache&lt;/tt&gt; CRON expression property suffix.
*/
<span class="code-keyword">public</span> <span class="code-keyword">static</span> <span class="code-keyword">final</span> <span class="code-object">String</span> OSCACHE_CRON = <span class="code-quote">"cron"</span>;
<span class="code-keyword">private</span> <span class="code-keyword">static</span> <span class="code-keyword">final</span> Properties OSCACHE_PROPERTIES = <span class="code-keyword">new</span> Config().getProperties();
/**
* Builds a <span class="code-keyword">new</span> {@link Cache} instance, and gets it's properties from the OSCache {@link Config}
* which reads the properties file (&lt;code&gt;oscache.properties&lt;/code&gt;) from the classpath.
* If the file cannot be found or loaded, an the defaults are used.
*
* @param region
* @param properties
* @<span class="code-keyword">return</span>
* @<span class="code-keyword">throws</span> CacheException
*/
<span class="code-keyword">public</span> Cache buildCache(<span class="code-object">String</span> region, Properties properties) <span class="code-keyword">throws</span> CacheException {
<span class="code-object">int</span> refreshPeriod = PropertiesHelper.getInt(
StringHelper.qualify(region, OSCACHE_REFRESH_PERIOD),
OSCACHE_PROPERTIES,
CacheEntry.INDEFINITE_EXPIRY
);
<span class="code-object">String</span> cron = OSCACHE_PROPERTIES.getProperty( StringHelper.qualify(region, OSCACHE_CRON) );
<span class="code-comment">// construct the cache
</span> <span class="code-keyword">return</span> <span class="code-keyword">new</span> OSCache(refreshPeriod, cron, region);
}
<span class="code-keyword">public</span> <span class="code-object">long</span> nextTimestamp() {
<span class="code-keyword">return</span> Timestamper.next();
}
/**
* Callback to perform any necessary initialization of the underlying cache implementation
* during SessionFactory construction.
*
* @param properties current configuration settings.
*/
<span class="code-keyword">public</span> void start(Properties properties) <span class="code-keyword">throws</span> CacheException {
}
/**
* Callback to perform any necessary cleanup of the underlying cache implementation
* during SessionFactory.close().
*/
<span class="code-keyword">public</span> void stop() {
}
}</pre>
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