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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.shiro.subject.support</a></div>
<h2 title="Class SubjectCallable" class="title">Class SubjectCallable&lt;V&gt;</h2>
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<li>org.apache.shiro.subject.support.SubjectCallable&lt;V&gt;</li>
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<dt>All Implemented Interfaces:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Callable</a>&lt;V&gt;</code></dd>
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<pre>public class <a href="../../../../../src-html/org/apache/shiro/subject/support/SubjectCallable.html#line.60">SubjectCallable</a>&lt;V&gt;
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>
implements <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Callable</a>&lt;V&gt;</pre>
<div class="block">A <code>SubjectCallable</code> associates a <a href="../Subject.html" title="interface in org.apache.shiro.subject"><code>Subject</code></a> with a target/delegate
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink"><code>Callable</code></a> to ensure proper <code>Subject</code> thread-state management when the <code>Callable</code> executes.
This ensures that any calls to <code>SecurityUtils.</code><a href="../../SecurityUtils.html#getSubject()"><code>getSubject()</code></a>
during the target <code>Callable</code>'s execution still work correctly even if the <code>Callable</code> executes on a
different thread than the one that created it. This allows <code>Subject</code> access during asynchronous operations.
<p/>
When instances of this class execute (typically via a <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink"><code>ExecutorService</code></a>),
the following occurs:
<ol>
<li>The specified Subject any of its associated thread state is first bound to the thread that executes the
<code>Callable</code>.</li>
<li>The delegate/target <code>Callable</code> is <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true#call()" title="class or interface in java.util.concurrent" class="externalLink"><code>executed</code></a></li>
<li>The previous thread state that might have existed before the <code>Subject</code> was bound is fully restored</li>
</ol>
<p/>
This behavior ensures that the thread that executes this <code>Callable</code>, which is often a different thread than
the one that created the instance, retains a <code>Subject</code> to support <code>SecurityUtils.getSubject()</code>
invocations. It also guarantees that the running thread remains 'clean' in any thread-pooled environments.
<h3>Usage</h3>
This is typically considered a support class and is not often directly referenced. Most people prefer to use
the <code>Subject.</code><a href="../Subject.html#associateWith(java.util.concurrent.Callable)"><code>associateWith</code></a> method, which will automatically return
an instance of this class.
<p/>
An even more convenient alternative is to use a
<a href="../../concurrent/SubjectAwareExecutorService.html" title="class in org.apache.shiro.concurrent"><code>SubjectAwareExecutorService</code></a>, which
transparently uses instances of this class.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.0</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../Subject.html#associateWith(java.util.concurrent.Callable)"><code>Subject.associateWith(Callable)</code></a>,
<a href="../../concurrent/SubjectAwareExecutorService.html" title="class in org.apache.shiro.concurrent"><code>SubjectAwareExecutorService</code></a></dd>
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<td class="colFirst"><code>protected <a href="../../util/ThreadState.html" title="interface in org.apache.shiro.util">ThreadState</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#threadState">threadState</a></span></code></th>
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<td class="colFirst"><code>&nbsp;</code></td>
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.shiro.subject.Subject,java.util.concurrent.Callable)">SubjectCallable</a></span>&#8203;(<a href="../Subject.html" title="interface in org.apache.shiro.subject">Subject</a>&nbsp;subject,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Callable</a>&lt;<a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a>&gt;&nbsp;delegate)</code></th>
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<td class="colFirst"><code>protected </code></td>
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.shiro.util.ThreadState,java.util.concurrent.Callable)">SubjectCallable</a></span>&#8203;(<a href="../../util/ThreadState.html" title="interface in org.apache.shiro.util">ThreadState</a>&nbsp;threadState,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Callable</a>&lt;<a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a>&gt;&nbsp;delegate)</code></th>
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<td class="colFirst"><code><a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#call()">call</a></span>()</code></th>
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<td class="colFirst"><code>protected <a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#doCall(java.util.concurrent.Callable)">doCall</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Callable</a>&lt;<a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a>&gt;&nbsp;target)</code></th>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></li>
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<h4>threadState</h4>
<pre>protected final&nbsp;<a href="../../util/ThreadState.html" title="interface in org.apache.shiro.util">ThreadState</a> <a href="../../../../../src-html/org/apache/shiro/subject/support/SubjectCallable.html#line.62">threadState</a></pre>
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<h4>SubjectCallable</h4>
<pre>public&nbsp;<a href="../../../../../src-html/org/apache/shiro/subject/support/SubjectCallable.html#line.65">SubjectCallable</a>&#8203;(<a href="../Subject.html" title="interface in org.apache.shiro.subject">Subject</a>&nbsp;subject,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Callable</a>&lt;<a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a>&gt;&nbsp;delegate)</pre>
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<pre>protected&nbsp;<a href="../../../../../src-html/org/apache/shiro/subject/support/SubjectCallable.html#line.69">SubjectCallable</a>&#8203;(<a href="../../util/ThreadState.html" title="interface in org.apache.shiro.util">ThreadState</a>&nbsp;threadState,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Callable</a>&lt;<a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a>&gt;&nbsp;delegate)</pre>
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<h4>call</h4>
<pre class="methodSignature">public&nbsp;<a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a>&nbsp;<a href="../../../../../src-html/org/apache/shiro/subject/support/SubjectCallable.html#line.80">call</a>()
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang" class="externalLink">Exception</a></pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true#call()" title="class or interface in java.util.concurrent" class="externalLink">call</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Callable</a>&lt;<a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a>&gt;</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang" class="externalLink">Exception</a></code></dd>
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<h4>doCall</h4>
<pre class="methodSignature">protected&nbsp;<a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a>&nbsp;<a href="../../../../../src-html/org/apache/shiro/subject/support/SubjectCallable.html#line.89">doCall</a>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent" class="externalLink">Callable</a>&lt;<a href="SubjectCallable.html" title="type parameter in SubjectCallable">V</a>&gt;&nbsp;target)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang" class="externalLink">Exception</a></pre>
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