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| <div class="page-header"> |
| <h1>Cache Manager</h1> |
| </div> |
| |
| |
| <div class="admonitionblock tip"> |
| <table> |
| <tbody> |
| <tr> |
| <td class="icon"> |
| <div class="title">Handy Hint</div> |
| </td> |
| <td class="content"> |
| <div class="title">Shiro v1 version notice</div> |
| <div class="paragraph"> |
| <p>As of 2024-03-01, Shiro v1 will soon be superseded by v2.<p> |
| </div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| |
| <div class="sect1"> |
| <h2 id="apache_shiro_cache_manager_overview">Apache Shiro Cache Manager Overview</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Shiro has three important cache interfaces:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><a href="static/current/apidocs/org/apache/shiro/cache/CacheManager.html"><code>CacheManager</code></a></p> |
| </li> |
| <li> |
| <p><a href="static/current/apidocs/org/apache/shiro/cache/Cache.html"><code>Cache</code></a></p> |
| </li> |
| <li> |
| <p><a href="static/current/apidocs/org/apache/shiro/cache/CacheManagerAware.html"><code>CacheManagerAware</code></a></p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>A <code>CacheManager</code> returns <code>Cache</code> instances and various Shiro components use those <code>Cache<</code> instances to cache data as necessary. |
| Any Shiro component that implements <code>CacheManager</code> will automatically receive a configured <code>CacheManager</code>, where it can be used to acquire <code>Cache</code> instances.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The Shiro <a href="securitymanager.html"><code>SecurityManager</code></a> implementations and all |
| <a href="static/current/apidocs/org/apache/shiro/realm/AuthorizingRealm.html"><code>AuthorizingRealm</code></a> implementations implement CacheManagerAware. |
| If you set the <code>CacheManager</code> on the <code>SecurityManager</code>, it will in turn set it on the various Realms that implement CacheManagerAware as well (OO delegation). |
| For example, in shiro.ini:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="title">example shiro.ini CacheManager configuration</div> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-ini hljs" data-lang="ini">securityManager.realms = $myRealm1, $myRealm2, ..., $myRealmN |
| ... |
| cacheManager = my.implementation.of.CacheManager |
| ... |
| securityManager.cacheManager = $cacheManager |
| # at this point, the securityManager and all CacheManagerAware |
| # realms have been set with the cacheManager instance</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>We have an out-of-the-box <a href="static/current/apidocs/org/apache/shiro/cache/ehcache/EhCacheManager.html"><code>EhCacheManager</code></a> implementation, so you can use that today if you wanted. |
| Otherwise, you can implement your own <code>CacheManager</code> (e.g. with Coherence, etc.) and configure it as above, and you’ll be good to go.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="CacheManager-AuthorizationCacheInvalidation">Authorization Cache Invalidation</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Finally, note that <a href="static/current/apidocs/org/apache/shiro/realm/AuthorizingRealm.html"><code>AuthorizingRealm</code></a> has a <a href="static/current/apidocs/org/apache/shiro/realm/AuthorizingRealm.html#clearCachedAuthorizationInfo%28org.apache.shiro.subject.PrincipalCollection%29"><code>clearCachedAuthorizationInfo</code></a> method that can be called by subclasses to evict the cached authzInfo for a particular account. |
| It is usually called by custom logic if the corresponding account’s authz data has changed (to ensure the next authz check will pick up the new data).</p> |
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