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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.kafka.streams</a></div>
<h1 title="Class KeyQueryMetadata" class="title">Class KeyQueryMetadata</h1>
</div>
<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
<div class="inheritance">org.apache.kafka.streams.KeyQueryMetadata</div>
</div>
<section class="class-description" id="class-description">
<hr>
<div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">KeyQueryMetadata</span>
<span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span></div>
<div class="block">Represents all the metadata related to a key, where a particular key resides in a <a href="KafkaStreams.html" title="class in org.apache.kafka.streams"><code>KafkaStreams</code></a> application.
It contains the active <a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state"><code>HostInfo</code></a> and a set of standby <a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state"><code>HostInfo</code></a>s, denoting the instances where the key resides.
It also contains the partition number where the key belongs, which could be useful when used in conjunction with other APIs.
e.g: Relating with lags for that store partition.
NOTE: This is a point in time view. It may change as rebalances happen.</div>
</section>
<section class="summary">
<ul class="summary-list">
<!-- =========== FIELD SUMMARY =========== -->
<li>
<section class="field-summary" id="field-summary">
<h2>Field Summary</h2>
<div class="caption"><span>Fields</span></div>
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Field</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>static final <a href="KeyQueryMetadata.html" title="class in org.apache.kafka.streams">KeyQueryMetadata</a></code></div>
<div class="col-second even-row-color"><code><a href="#NOT_AVAILABLE" class="member-name-link">NOT_AVAILABLE</a></code></div>
<div class="col-last even-row-color">
<div class="block">Sentinel to indicate that the KeyQueryMetadata is currently unavailable.</div>
</div>
</div>
</section>
</li>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<li>
<section class="constructor-summary" id="constructor-summary">
<h2>Constructor Summary</h2>
<div class="caption"><span>Constructors</span></div>
<div class="summary-table two-column-summary">
<div class="table-header col-first">Constructor</div>
<div class="table-header col-last">Description</div>
<div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E(org.apache.kafka.streams.state.HostInfo,java.util.Set,int)" class="member-name-link">KeyQueryMetadata</a><wbr>(<a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a>&nbsp;activeHost,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a>&lt;<a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a>&gt;&nbsp;standbyHosts,
int&nbsp;partition)</code></div>
<div class="col-last even-row-color">&nbsp;</div>
</div>
</section>
</li>
<!-- ========== METHOD SUMMARY =========== -->
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<section class="method-summary" id="method-summary">
<h2>Method Summary</h2>
<div id="method-summary-table">
<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button><button id="method-summary-table-tab6" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab6', 3)" class="table-tab">Deprecated Methods</button></div>
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<div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#activeHost()" class="member-name-link">activeHost</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Get the active Kafka Streams instance for given key.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#equals(java.lang.Object)" class="member-name-link">equals</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;obj)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="#getActiveHost()" class="member-name-link">getActiveHost</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6">
<div class="block"><span class="deprecated-label">Deprecated.</span>
<div class="deprecation-comment">Use <a href="#activeHost()"><code>activeHost()</code></a> instead.</div>
</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code>int</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="#getPartition()" class="member-name-link">getPartition</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6">
<div class="block"><span class="deprecated-label">Deprecated.</span>
<div class="deprecation-comment">Use <a href="#partition()"><code>partition()</code></a> instead.</div>
</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a>&lt;<a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a>&gt;</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6"><code><a href="#getStandbyHosts()" class="member-name-link">getStandbyHosts</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4 method-summary-table-tab6">
<div class="block"><span class="deprecated-label">Deprecated.</span>
<div class="deprecation-comment">Use <a href="#standbyHosts()"><code>standbyHosts()</code></a> instead.</div>
</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#hashCode()" class="member-name-link">hashCode</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#partition()" class="member-name-link">partition</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Get the store partition corresponding to the key.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a>&lt;<a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a>&gt;</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#standbyHosts()" class="member-name-link">standbyHosts</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Get the Kafka Streams instances that host the key as standbys.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#toString()" class="member-name-link">toString</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ============ FIELD DETAIL =========== -->
<li>
<section class="field-details" id="field-detail">
<h2>Field Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="NOT_AVAILABLE">
<h3>NOT_AVAILABLE</h3>
<div class="member-signature"><span class="modifiers">public static final</span>&nbsp;<span class="return-type"><a href="KeyQueryMetadata.html" title="class in org.apache.kafka.streams">KeyQueryMetadata</a></span>&nbsp;<span class="element-name">NOT_AVAILABLE</span></div>
<div class="block">Sentinel to indicate that the KeyQueryMetadata is currently unavailable. This can occur during rebalance
operations.</div>
</section>
</li>
</ul>
</section>
</li>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<li>
<section class="constructor-details" id="constructor-detail">
<h2>Constructor Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="&lt;init&gt;(org.apache.kafka.streams.state.HostInfo,java.util.Set,int)">
<h3>KeyQueryMetadata</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">KeyQueryMetadata</span><wbr><span class="parameters">(<a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a>&nbsp;activeHost,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a>&lt;<a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a>&gt;&nbsp;standbyHosts,
int&nbsp;partition)</span></div>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="getActiveHost()">
<h3>getActiveHost</h3>
<div class="member-signature"><span class="annotations"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Deprecated.html" title="class or interface in java.lang" class="external-link">@Deprecated</a>
</span><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a></span>&nbsp;<span class="element-name">getActiveHost</span>()</div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span>
<div class="deprecation-comment">Use <a href="#activeHost()"><code>activeHost()</code></a> instead.</div>
</div>
<div class="block">Get the active Kafka Streams instance for given key.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>active instance's <a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state"><code>HostInfo</code></a></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getStandbyHosts()">
<h3>getStandbyHosts</h3>
<div class="member-signature"><span class="annotations"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Deprecated.html" title="class or interface in java.lang" class="external-link">@Deprecated</a>
</span><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a>&lt;<a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a>&gt;</span>&nbsp;<span class="element-name">getStandbyHosts</span>()</div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span>
<div class="deprecation-comment">Use <a href="#standbyHosts()"><code>standbyHosts()</code></a> instead.</div>
</div>
<div class="block">Get the Kafka Streams instances that host the key as standbys.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>set of standby <a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state"><code>HostInfo</code></a> or a empty set, if no standbys are configured</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getPartition()">
<h3>getPartition</h3>
<div class="member-signature"><span class="annotations"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Deprecated.html" title="class or interface in java.lang" class="external-link">@Deprecated</a>
</span><span class="modifiers">public</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">getPartition</span>()</div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span>
<div class="deprecation-comment">Use <a href="#partition()"><code>partition()</code></a> instead.</div>
</div>
<div class="block">Get the store partition corresponding to the key.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>store partition number</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="activeHost()">
<h3>activeHost</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a></span>&nbsp;<span class="element-name">activeHost</span>()</div>
<div class="block">Get the active Kafka Streams instance for given key.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>active instance's <a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state"><code>HostInfo</code></a></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="standbyHosts()">
<h3>standbyHosts</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a>&lt;<a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state">HostInfo</a>&gt;</span>&nbsp;<span class="element-name">standbyHosts</span>()</div>
<div class="block">Get the Kafka Streams instances that host the key as standbys.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>set of standby <a href="state/HostInfo.html" title="class in org.apache.kafka.streams.state"><code>HostInfo</code></a> or a empty set, if no standbys are configured</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="partition()">
<h3>partition</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">partition</span>()</div>
<div class="block">Get the store partition corresponding to the key.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>store partition number</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="equals(java.lang.Object)">
<h3>equals</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">equals</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;obj)</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="toString()">
<h3>toString</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">toString</span>()</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></code></dd>
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<section class="detail" id="hashCode()">
<h3>hashCode</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">hashCode</span>()</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></code></dd>
</dl>
</section>
</li>
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</section>
</li>
</ul>
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