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<h2 title="Class KafkaPrincipal" class="title">Class KafkaPrincipal</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
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<li>org.apache.kafka.common.security.auth.KafkaPrincipal</li>
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<dd><code>java.security.Principal</code></dd>
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<pre>public class <span class="typeNameLabel">KafkaPrincipal</span>
extends java.lang.Object
implements java.security.Principal</pre>
<div class="block">Principals in Kafka are defined by a type and a name. The principal type will always be "User"
for the simple authorizer that is enabled by default, but custom authorizers can leverage different
principal types (such as to enable group or role-based ACLs). The <a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipalBuilder.html" title="interface in org.apache.kafka.common.security.auth"><code>KafkaPrincipalBuilder</code></a> interface
is used when you need to derive a different principal type from the authentication context, or when
you need to represent relations between different principals. For example, you could extend
<a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth"><code>KafkaPrincipal</code></a> in order to link a user principal to one or more role principals.
For custom extensions of <a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth"><code>KafkaPrincipal</code></a>, there two key points to keep in mind:
1. To be compatible with the ACL APIs provided by Kafka (including the command line tool), each ACL
can only represent a permission granted to a single principal (consisting of a principal type and name).
It is possible to use richer ACL semantics, but you must implement your own mechanisms for adding
and removing ACLs.
2. In general, <a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth"><code>KafkaPrincipal</code></a> extensions are only useful when the corresponding Authorizer
is also aware of the extension. If you have a <a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipalBuilder.html" title="interface in org.apache.kafka.common.security.auth"><code>KafkaPrincipalBuilder</code></a> which derives user groups
from the authentication context (e.g. from an SSL client certificate), then you need a custom
authorizer which is capable of using the additional group information.</div>
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<td class="colFirst"><code>static <a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth">KafkaPrincipal</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#ANONYMOUS">ANONYMOUS</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#USER_TYPE">USER_TYPE</a></span></code></th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#KafkaPrincipal-java.lang.String-java.lang.String-">KafkaPrincipal</a></span>&#8203;(java.lang.String&nbsp;principalType,
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<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#equals-java.lang.Object-">equals</a></span>&#8203;(java.lang.Object&nbsp;o)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth">KafkaPrincipal</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#fromString-java.lang.String-">fromString</a></span>&#8203;(java.lang.String&nbsp;str)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;
<div class="block"><span class="deprecationComment">As of 1.0.0. This method will be removed in a future major release.</span></div>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#getName--">getName</a></span>&#8203;()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#getPrincipalType--">getPrincipalType</a></span>&#8203;()</code></th>
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<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#hashCode--">hashCode</a></span>&#8203;()</code></th>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#tokenAuthenticated--">tokenAuthenticated</a></span>&#8203;()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#tokenAuthenticated-boolean-">tokenAuthenticated</a></span>&#8203;(boolean&nbsp;tokenAuthenticated)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html#toString--">toString</a></span>&#8203;()</code></th>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, finalize, getClass, notify, notifyAll, wait, wait, wait</code></li>
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<h3>Methods inherited from interface&nbsp;java.security.Principal</h3>
<code>implies</code></li>
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<h4>USER_TYPE</h4>
<pre>public static final&nbsp;java.lang.String USER_TYPE</pre>
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<dd><a href="../../../../../../constant-values.html#org.apache.kafka.common.security.auth.KafkaPrincipal.USER_TYPE">Constant Field Values</a></dd>
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<h4>ANONYMOUS</h4>
<pre>public static final&nbsp;<a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth">KafkaPrincipal</a> ANONYMOUS</pre>
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<h4>KafkaPrincipal</h4>
<pre>public&nbsp;KafkaPrincipal&#8203;(java.lang.String&nbsp;principalType,
java.lang.String&nbsp;name)</pre>
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<h4>fromString</h4>
<pre>@Deprecated
public static&nbsp;<a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth">KafkaPrincipal</a>&nbsp;fromString&#8203;(java.lang.String&nbsp;str)</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;<span class="deprecationComment">As of 1.0.0. This method will be removed in a future major release.</span></div>
<div class="block">Parse a <a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth"><code>KafkaPrincipal</code></a> instance from a string. This method cannot be used for <a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth"><code>KafkaPrincipal</code></a>
extensions.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>str</code> - The input string formatted as "{principalType}:{principalName}"</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The parsed <a href="../../../../../../org/apache/kafka/common/security/auth/KafkaPrincipal.html" title="class in org.apache.kafka.common.security.auth"><code>KafkaPrincipal</code></a> instance</dd>
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<h4>toString</h4>
<pre>public&nbsp;java.lang.String&nbsp;toString&#8203;()</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>toString</code>&nbsp;in interface&nbsp;<code>java.security.Principal</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>toString</code>&nbsp;in class&nbsp;<code>java.lang.Object</code></dd>
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<h4>equals</h4>
<pre>public&nbsp;boolean&nbsp;equals&#8203;(java.lang.Object&nbsp;o)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>equals</code>&nbsp;in interface&nbsp;<code>java.security.Principal</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>equals</code>&nbsp;in class&nbsp;<code>java.lang.Object</code></dd>
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<h4>hashCode</h4>
<pre>public&nbsp;int&nbsp;hashCode&#8203;()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>hashCode</code>&nbsp;in interface&nbsp;<code>java.security.Principal</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>hashCode</code>&nbsp;in class&nbsp;<code>java.lang.Object</code></dd>
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<pre>public&nbsp;java.lang.String&nbsp;getName&#8203;()</pre>
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<dd><code>getName</code>&nbsp;in interface&nbsp;<code>java.security.Principal</code></dd>
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<h4>getPrincipalType</h4>
<pre>public&nbsp;java.lang.String&nbsp;getPrincipalType&#8203;()</pre>
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<pre>public&nbsp;void&nbsp;tokenAuthenticated&#8203;(boolean&nbsp;tokenAuthenticated)</pre>
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<pre>public&nbsp;boolean&nbsp;tokenAuthenticated&#8203;()</pre>
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