<h2>Current Reference</h2>

<li>

(<a href="/doc/nhibernate-reference/index.html">HTML</a>,

<a href="/doc/nh/en/index.html">single page HTML</a>,

<a href="/doc/nh/en/nhibernate_reference.pdf">PDF</a>,

<h2>Previous Reference</h2>

<li>

<a href="/previous-doc/v5.2/ref/index.html">The NHibernate Reference, v5.2</a>

(<a href="/previous-doc/v5.2/ref/index.html">HTML</a>,

</dd></dl></div><p>

SysCache has a config file section handler to allow configuring different expirations and priorities for

different regions. Here is an example:

&lt;configuration&gt;

&lt;configSections&gt;

&lt;section name="syscache"

</dd></dl></div><p>

To configure cache regions with SqlCacheDependencies a <tt class="literal">syscache2</tt> config section must be

defined in the application's configuration file. See the sample below.

&lt;configSections&gt;

&lt;section name="syscache2"

type="NHibernate.Caches.SysCache2.SysCacheSection, NHibernate.Caches.SysCache2"/&gt;

</p><p>

To configure the data in a cache region to be invalidated when data in an underlying table is changed,

a cache region must be configured in the application's configuration file. See the sample below.

&lt;cacheRegion name="Product"&gt;

&lt;dependencies&gt;

&lt;tables&gt;

</p><p>

To configure the data in a cache region to be invalidated based on a SQL command, a cache region must

be configured in the application's configuration file. See the samples below.

&lt;dependencies&gt;

&lt;commands&gt;

&lt;add name="price"

command="ActiveProductsStoredProcedure"

isStoredProcedure="true"/&gt;

&lt;/commands&gt;

&lt;/dependencies&gt;

&lt;dependencies&gt;

&lt;commands&gt;

&lt;add name="price"

</dd></dl></div></div><div class="section" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="NHibernate.Caches.SysCache2-Aggregate"></a>27.5.3.&nbsp;Aggregate Dependencies</h3></div></div><div></div></div><p>

Multiple cache dependencies can be specified. If any of the dependencies triggers a change

notification, the data in the cache region will be invalidated. See the samples below.

&lt;dependencies&gt;

&lt;commands&gt;

&lt;add name="price"

command="Select quantityAvailable from dbo.VideoAvailability"/&gt;

&lt;/commands&gt;

&lt;/dependencies&gt;

&lt;dependencies&gt;

&lt;commands&gt;

&lt;add name="price"

for each item added to the cache. Time based expiration policies will not invalidate the data

dependencies for the whole cache region, but serve as a way to remove items from the cache after they

have been in the cache for a specified amount of time. See the samples below.

Number of seconds that an individual item will exist in the cache before being removed.

Defaults to <tt class="literal">300</tt> if neither <tt class="literal">relativeExpiration</tt> nor

<tt class="literal">timeOfDayExpiration</tt> are defined, and if no expiration settings are

</dd></dl></div><p>

RtMemoryCache has a config file section handler to allow configuring different expirations for

different regions. Here is an example:

&lt;configuration&gt;

&lt;configSections&gt;

&lt;section name="rtmemorycache"

</dd></dl></div><p>

NHibernate.Caches.StackExchangeRedis has a config file section handler to allow configuring different expirations for

different regions. Here is an example:

&lt;configuration&gt;

&lt;configSections&gt;

&lt;section name="redis"

CoreMemoryCache has a config file section handler to allow configuring different expirations for

different regions, and configuring the <tt class="literal">MemoryCache</tt> expiration scan frequency.

Here is an example:

&lt;configuration&gt;

&lt;configSections&gt;

&lt;section name="corememorycache"

different regions, configuring the <tt class="literal">IDistributedCacheFactory</tt> to use, and configuring

additional properties specific to the chosen <tt class="literal">IDistributedCache</tt> implementation.

Here is an example:

&lt;configuration&gt;

&lt;configSections&gt;

&lt;section name="coredistributedcache"

<a href="https://github.com/cnblogs/EnyimMemcachedCore" target="_top">project website</a>. It has to be structured

like the value part of the <tt class="literal">"enyimMemcached"</tt> property in an

<tt class="literal">appsettings.json</tt> file.

"Servers": [

{

"Address": "localhost",

---

<title>Preface</title><link rel="stylesheet" href="../shared/css/html.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.65.1"><link rel="home" href="index.html" title="NHibernate - Relational Persistence for Idiomatic .NET"><link rel="up" href="part-contrib.html" title="Part&nbsp;I.&nbsp;NHibernateContrib Documentation"><link rel="previous" href="part-contrib.html" title="Part&nbsp;I.&nbsp;NHibernateContrib Documentation"><link rel="next" href="caches.html" title="Chapter&nbsp;27.&nbsp;NHibernate.Caches"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Preface</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="part-contrib.html">Prev</a>&nbsp;</td><th width="60%" align="center">Part&nbsp;I.&nbsp;NHibernateContrib Documentation</th><td width="20%" align="right">&nbsp;<a accesskey="n" href="caches.html">Next</a></td></tr></table><hr></div><div class="preface" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="contrib-preface"></a>Preface</h2></div></div><div></div></div>{% include google_adsense.html %}<p>The NHibernateContrib is various programs contributed to NHibernate by members of the NHibernate Team or by the end users. The projects in here are not considered core pieces of NHibernate but they extend it in a useful way.</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="part-contrib.html">Prev</a>&nbsp;</td><td width="20%" align="center"><a accesskey="u" href="part-contrib.html">Up</a></td><td width="40%" align="right">&nbsp;<a accesskey="n" href="caches.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Part&nbsp;I.&nbsp;NHibernateContrib Documentation&nbsp;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&nbsp;Chapter&nbsp;27.&nbsp;NHibernate.Caches</td></tr></table></div>{% include google_analytics.html %}{% include metrika_yandex_ru.html %}</body></html>