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apache / qpid-site / 59722a6d7b31fcff406c583f06f5acea256641b0 / . / content / releases / qpid-protonj2-1.0.0-M1 / api / org / apache / qpid / protonj2 / engine / util / RingQueue.html
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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.qpid.protonj2.engine.util</a></div>
<h2 title="Class RingQueue" class="title">Class RingQueue&lt;E&gt;</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>java.util.AbstractCollection&lt;E&gt;</li>
<li>
<ul class="inheritance">
<li>java.util.AbstractQueue&lt;E&gt;</li>
<li>
<ul class="inheritance">
<li>org.apache.qpid.protonj2.engine.util.RingQueue&lt;E&gt;</li>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>E</code> - the element type that is stored in this <code>Queue</code> type.</dd>
</dl>
<dl>
<dt>All Implemented Interfaces:</dt>
<dd><code>java.lang.Iterable&lt;E&gt;</code>, <code>java.util.Collection&lt;E&gt;</code>, <code>java.util.Queue&lt;E&gt;</code></dd>
</dl>
<hr>
<pre>public class <span class="typeNameLabel">RingQueue&lt;E&gt;</span>
extends java.util.AbstractQueue&lt;E&gt;</pre>
<div class="block">Simple Ring Queue implementation that has an enforced max size value.</div>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(int)">RingQueue</a></span>&#8203;(int&nbsp;queueSize)</code></th>
<td class="colLast">
<div class="block">Creates a new <a href="RingQueue.html" title="class in org.apache.qpid.protonj2.engine.util"><code>RingQueue</code></a> instance with the given fixed Queue size.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.util.Collection)">RingQueue</a></span>&#8203;(java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;&nbsp;collection)</code></th>
<td class="colLast">
<div class="block">Creates a new <a href="RingQueue.html" title="class in org.apache.qpid.protonj2.engine.util"><code>RingQueue</code></a> instance with a size that matches the size of the
given <code>Collection</code> and filled with the values from that <code>Collection</code>.</div>
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<th class="colSecond" scope="col">Method</th>
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<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addAll(java.util.Collection)">addAll</a></span>&#8203;(java.util.Collection&lt;? extends <a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;&nbsp;c)</code></th>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#clear()">clear</a></span>()</code></th>
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<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#contains(java.lang.Object)">contains</a></span>&#8203;(java.lang.Object&nbsp;value)</code></th>
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<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isEmpty()">isEmpty</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>java.util.Iterator&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#iterator()">iterator</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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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="#offer(E)">offer</a></span>&#8203;(<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&nbsp;e)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="RingQueue.html" title="type parameter in RingQueue">E</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#peek()">peek</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="RingQueue.html" title="type parameter in RingQueue">E</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#poll()">poll</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code><a href="RingQueue.html" title="type parameter in RingQueue">E</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#poll(java.util.function.Supplier)">poll</a></span>&#8203;(java.util.function.Supplier&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;&nbsp;createOnEmpty)</code></th>
<td class="colLast">
<div class="block">Retrieves and removes the head of this ring queue, and if the queue is currently empty
a new instance of the queue type is provided by invoking the given <code>Supplier</code>.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#remove(java.lang.Object)">remove</a></span>&#8203;(java.lang.Object&nbsp;o)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i10" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeAll(java.util.Collection)">removeAll</a></span>&#8203;(java.util.Collection&lt;?&gt;&nbsp;c)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i11" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#retainAll(java.util.Collection)">retainAll</a></span>&#8203;(java.util.Collection&lt;?&gt;&nbsp;c)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#size()">size</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<h3>Methods inherited from class&nbsp;java.util.AbstractQueue</h3>
<code>add, element, remove</code></li>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
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<h3>Methods inherited from interface&nbsp;java.util.Collection</h3>
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<code>forEach</code></li>
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<h4>RingQueue</h4>
<pre>public&nbsp;RingQueue&#8203;(int&nbsp;queueSize)</pre>
<div class="block">Creates a new <a href="RingQueue.html" title="class in org.apache.qpid.protonj2.engine.util"><code>RingQueue</code></a> instance with the given fixed Queue size.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>queueSize</code> - The size to use for the ring queue.</dd>
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<h4>RingQueue</h4>
<pre>public&nbsp;RingQueue&#8203;(java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;&nbsp;collection)</pre>
<div class="block">Creates a new <a href="RingQueue.html" title="class in org.apache.qpid.protonj2.engine.util"><code>RingQueue</code></a> instance with a size that matches the size of the
given <code>Collection</code> and filled with the values from that <code>Collection</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>collection</code> - the <code>Collection</code> whose values populates this <a href="RingQueue.html" title="class in org.apache.qpid.protonj2.engine.util"><code>RingQueue</code></a> instance.</dd>
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<a id="offer(java.lang.Object)">
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<h4>offer</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;offer&#8203;(<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&nbsp;e)</pre>
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<h4>poll</h4>
<pre class="methodSignature">public&nbsp;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&nbsp;poll()</pre>
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<h4>poll</h4>
<pre class="methodSignature">public&nbsp;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&nbsp;poll&#8203;(java.util.function.Supplier&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;&nbsp;createOnEmpty)</pre>
<div class="block">Retrieves and removes the head of this ring queue, and if the queue is currently empty
a new instance of the queue type is provided by invoking the given <code>Supplier</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>createOnEmpty</code> - a <code>Supplier</code> which will return default values if the <a href="RingQueue.html" title="class in org.apache.qpid.protonj2.engine.util"><code>RingQueue</code></a> is empty.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the head element of this queue or a default instance created from the provided <code>Supplier</code>/</dd>
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<h4>peek</h4>
<pre class="methodSignature">public&nbsp;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&nbsp;peek()</pre>
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<h4>addAll</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;addAll&#8203;(java.util.Collection&lt;? extends <a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;&nbsp;c)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>addAll</code>&nbsp;in interface&nbsp;<code>java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>addAll</code>&nbsp;in class&nbsp;<code>java.util.AbstractQueue&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
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<h4>remove</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;remove&#8203;(java.lang.Object&nbsp;o)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>remove</code>&nbsp;in interface&nbsp;<code>java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>remove</code>&nbsp;in class&nbsp;<code>java.util.AbstractCollection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
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<h4>removeAll</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;removeAll&#8203;(java.util.Collection&lt;?&gt;&nbsp;c)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>removeAll</code>&nbsp;in interface&nbsp;<code>java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>removeAll</code>&nbsp;in class&nbsp;<code>java.util.AbstractCollection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
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<h4>retainAll</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;retainAll&#8203;(java.util.Collection&lt;?&gt;&nbsp;c)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>retainAll</code>&nbsp;in interface&nbsp;<code>java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>retainAll</code>&nbsp;in class&nbsp;<code>java.util.AbstractCollection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
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<h4>iterator</h4>
<pre class="methodSignature">public&nbsp;java.util.Iterator&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;&nbsp;iterator()</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>iterator</code>&nbsp;in interface&nbsp;<code>java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>iterator</code>&nbsp;in interface&nbsp;<code>java.lang.Iterable&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>iterator</code>&nbsp;in class&nbsp;<code>java.util.AbstractCollection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
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<h4>size</h4>
<pre class="methodSignature">public&nbsp;int&nbsp;size()</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>size</code>&nbsp;in interface&nbsp;<code>java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>size</code>&nbsp;in class&nbsp;<code>java.util.AbstractCollection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
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<h4>isEmpty</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;isEmpty()</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>isEmpty</code>&nbsp;in interface&nbsp;<code>java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>isEmpty</code>&nbsp;in class&nbsp;<code>java.util.AbstractCollection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
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<h4>clear</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;clear()</pre>
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<dd><code>clear</code>&nbsp;in interface&nbsp;<code>java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
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<h4>contains</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;contains&#8203;(java.lang.Object&nbsp;value)</pre>
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<dd><code>contains</code>&nbsp;in interface&nbsp;<code>java.util.Collection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>contains</code>&nbsp;in class&nbsp;<code>java.util.AbstractCollection&lt;<a href="RingQueue.html" title="type parameter in RingQueue">E</a>&gt;</code></dd>
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