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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.activemq.artemis.core.io.mapped</a></div>
<h2 title="Class MappedSequentialFileFactory" class="title">Class MappedSequentialFileFactory</h2>
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<li><a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">org.apache.activemq.artemis.core.io.AbstractSequentialFileFactory</a></li>
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<li>org.apache.activemq.artemis.core.io.mapped.MappedSequentialFileFactory</li>
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<dd><code><a href="../SequentialFileFactory.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFileFactory</a></code></dd>
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<pre>public final class <span class="typeNameLabel">MappedSequentialFileFactory</span>
extends <a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">AbstractSequentialFileFactory</a></pre>
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<h3>Fields inherited from class&nbsp;org.apache.activemq.artemis.core.io.<a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">AbstractSequentialFileFactory</a></h3>
<code><a href="../AbstractSequentialFileFactory.html#alignment">alignment</a>, <a href="../AbstractSequentialFileFactory.html#bufferSize">bufferSize</a>, <a href="../AbstractSequentialFileFactory.html#bufferTimeout">bufferTimeout</a>, <a href="../AbstractSequentialFileFactory.html#critialErrorListener">critialErrorListener</a>, <a href="../AbstractSequentialFileFactory.html#criticalAnalyzer">criticalAnalyzer</a>, <a href="../AbstractSequentialFileFactory.html#dataSync">dataSync</a>, <a href="../AbstractSequentialFileFactory.html#EXECUTOR_TIMEOUT">EXECUTOR_TIMEOUT</a>, <a href="../AbstractSequentialFileFactory.html#journalDir">journalDir</a>, <a href="../AbstractSequentialFileFactory.html#maxIO">maxIO</a>, <a href="../AbstractSequentialFileFactory.html#timedBuffer">timedBuffer</a>, <a href="../AbstractSequentialFileFactory.html#writeExecutor">writeExecutor</a></code></li>
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<th class="colFirst" scope="col">Constructor</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.io.File,int,boolean,int,int,org.apache.activemq.artemis.core.io.IOCriticalErrorListener)">MappedSequentialFileFactory</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io" class="externalLink">File</a>&nbsp;directory,
int&nbsp;capacity,
boolean&nbsp;buffered,
int&nbsp;bufferSize,
int&nbsp;bufferTimeout,
<a href="../IOCriticalErrorListener.html" title="interface in org.apache.activemq.artemis.core.io">IOCriticalErrorListener</a>&nbsp;criticalErrorListener)</code></th>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#allocateDirectBuffer(int)">allocateDirectBuffer</a></span>&#8203;(int&nbsp;size)</code></th>
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<div class="block">used for cases where you need direct buffer outside of the journal context.</div>
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<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#calculateBlockSize(int)">calculateBlockSize</a></span>&#8203;(int&nbsp;bytes)</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#capacity()">capacity</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#capacity(int)">capacity</a></span>&#8203;(int&nbsp;capacity)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#clearBuffer(java.nio.ByteBuffer)">clearBuffer</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a>&nbsp;buffer)</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code><a href="../SequentialFile.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFile</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createSequentialFile(java.lang.String)">createSequentialFile</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;fileName)</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code><a href="../SequentialFile.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFile</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createSequentialFile(java.lang.String,int)">createSequentialFile</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;fileName,
int&nbsp;capacity)</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#disableBufferReuse()">disableBufferReuse</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i8" class="altColor">
<td class="colFirst"><code><a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#enableBufferReuse()">enableBufferReuse</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getAlignment()">getAlignment</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isSupportsCallbacks()">isSupportsCallbacks</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newBuffer(int)">newBuffer</a></span>&#8203;(int&nbsp;size)</code></th>
<td class="colLast">
<div class="block">Note: You need to release the buffer if is used for reading operations.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newBuffer(int,boolean)">newBuffer</a></span>&#8203;(int&nbsp;size,
boolean&nbsp;zeroed)</code></th>
<td class="colLast">
<div class="block">Note: You need to release the buffer if is used for reading operations.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#releaseBuffer(java.nio.ByteBuffer)">releaseBuffer</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a>&nbsp;buffer)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#releaseDirectBuffer(java.nio.ByteBuffer)">releaseDirectBuffer</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a>&nbsp;buffer)</code></th>
<td class="colLast">
<div class="block">used for cases where you need direct buffer outside of the journal context.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code><a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setAlignment(int)">setAlignment</a></span>&#8203;(int&nbsp;alignment)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code><a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setDatasync(boolean)">setDatasync</a></span>&#8203;(boolean&nbsp;enabled)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#start()">start</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#stop()">stop</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#wrapBuffer(byte%5B%5D)">wrapBuffer</a></span>&#8203;(byte[]&nbsp;bytes)</code></th>
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<h3>Methods inherited from class&nbsp;org.apache.activemq.artemis.core.io.<a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">AbstractSequentialFileFactory</a></h3>
<code><a href="../AbstractSequentialFileFactory.html#activateBuffer(org.apache.activemq.artemis.core.io.SequentialFile)">activateBuffer</a>, <a href="../AbstractSequentialFileFactory.html#createDirs()">createDirs</a>, <a href="../AbstractSequentialFileFactory.html#deactivateBuffer()">deactivateBuffer</a>, <a href="../AbstractSequentialFileFactory.html#flush()">flush</a>, <a href="../AbstractSequentialFileFactory.html#getBufferSize()">getBufferSize</a>, <a href="../AbstractSequentialFileFactory.html#getCriticalAnalyzer()">getCriticalAnalyzer</a>, <a href="../AbstractSequentialFileFactory.html#getCriticalErrorListener()">getCriticalErrorListener</a>, <a href="../AbstractSequentialFileFactory.html#getDirectory()">getDirectory</a>, <a href="../AbstractSequentialFileFactory.html#getMaxIO()">getMaxIO</a>, <a href="../AbstractSequentialFileFactory.html#isDatasync()">isDatasync</a>, <a href="../AbstractSequentialFileFactory.html#listFiles(java.lang.String)">listFiles</a>, <a href="../AbstractSequentialFileFactory.html#onIOError(java.lang.Throwable,java.lang.String,java.lang.String)">onIOError</a>, <a href="../AbstractSequentialFileFactory.html#setCriticalErrorListener(org.apache.activemq.artemis.core.io.IOCriticalErrorListener)">setCriticalErrorListener</a></code></li>
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<h3>Methods inherited from interface&nbsp;org.apache.activemq.artemis.core.io.<a href="../SequentialFileFactory.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFileFactory</a></h3>
<code><a href="../SequentialFileFactory.html#onIOError(java.lang.Throwable,java.lang.String)">onIOError</a>, <a href="../SequentialFileFactory.html#onIOError(java.lang.Throwable,java.lang.String,org.apache.activemq.artemis.core.io.SequentialFile)">onIOError</a></code></li>
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<a id="&lt;init&gt;(java.io.File,int,boolean,int,int,org.apache.activemq.artemis.core.io.IOCriticalErrorListener)">
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<h4>MappedSequentialFileFactory</h4>
<pre>public&nbsp;MappedSequentialFileFactory&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io" class="externalLink">File</a>&nbsp;directory,
int&nbsp;capacity,
boolean&nbsp;buffered,
int&nbsp;bufferSize,
int&nbsp;bufferTimeout,
<a href="../IOCriticalErrorListener.html" title="interface in org.apache.activemq.artemis.core.io">IOCriticalErrorListener</a>&nbsp;criticalErrorListener)</pre>
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<h4>capacity</h4>
<pre class="methodSignature">public&nbsp;<a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a>&nbsp;capacity&#8203;(int&nbsp;capacity)</pre>
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<h4>capacity</h4>
<pre class="methodSignature">public&nbsp;int&nbsp;capacity()</pre>
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<h4>createSequentialFile</h4>
<pre class="methodSignature">public&nbsp;<a href="../SequentialFile.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFile</a>&nbsp;createSequentialFile&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;fileName)</pre>
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<pre class="methodSignature">public&nbsp;<a href="../SequentialFile.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFile</a>&nbsp;createSequentialFile&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;fileName,
int&nbsp;capacity)</pre>
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<pre class="methodSignature">public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a>&nbsp;allocateDirectBuffer&#8203;(int&nbsp;size)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../SequentialFileFactory.html#allocateDirectBuffer(int)">SequentialFileFactory</a></code></span></div>
<div class="block">used for cases where you need direct buffer outside of the journal context.
This is because the native layer has a method that can be reused in certain cases like paging</div>
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<pre class="methodSignature">public&nbsp;void&nbsp;releaseDirectBuffer&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a>&nbsp;buffer)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../SequentialFileFactory.html#releaseDirectBuffer(java.nio.ByteBuffer)">SequentialFileFactory</a></code></span></div>
<div class="block">used for cases where you need direct buffer outside of the journal context.
This is because the native layer has a method that can be reused in certain cases like paging</div>
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<pre class="methodSignature">public&nbsp;<a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a>&nbsp;enableBufferReuse()</pre>
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<pre class="methodSignature">public&nbsp;<a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a>&nbsp;disableBufferReuse()</pre>
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../SequentialFileFactory.html#newBuffer(int)">SequentialFileFactory</a></code></span></div>
<div class="block">Note: You need to release the buffer if is used for reading operations. You don't need to do
it if using writing operations (AIO Buffer Lister will take of writing operations)</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>the allocated ByteBuffer</dd>
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../SequentialFileFactory.html#newBuffer(int,boolean)">SequentialFileFactory</a></code></span></div>
<div class="block">Note: You need to release the buffer if is used for reading operations. You don't need to do
it if using writing operations (AIO Buffer Lister will take of writing operations)</div>
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<dd><code>zeroed</code> - if <code>true</code> the returned <a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink"><code>ByteBuffer</code></a> must be zeroed, otherwise it tries to save zeroing it.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the allocated ByteBuffer</dd>
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<pre class="methodSignature">public&nbsp;void&nbsp;releaseBuffer&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio" class="externalLink">ByteBuffer</a>&nbsp;buffer)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../SequentialFileFactory.html#releaseBuffer(java.nio.ByteBuffer)">releaseBuffer</a></code>&nbsp;in interface&nbsp;<code><a href="../SequentialFileFactory.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFileFactory</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../AbstractSequentialFileFactory.html#releaseBuffer(java.nio.ByteBuffer)">releaseBuffer</a></code>&nbsp;in class&nbsp;<code><a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">AbstractSequentialFileFactory</a></code></dd>
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<pre class="methodSignature">public&nbsp;<a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a>&nbsp;setDatasync&#8203;(boolean&nbsp;enabled)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../SequentialFileFactory.html#setDatasync(boolean)">setDatasync</a></code>&nbsp;in interface&nbsp;<code><a href="../SequentialFileFactory.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFileFactory</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../AbstractSequentialFileFactory.html#setDatasync(boolean)">setDatasync</a></code>&nbsp;in class&nbsp;<code><a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">AbstractSequentialFileFactory</a></code></dd>
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<pre class="methodSignature">public&nbsp;int&nbsp;getAlignment()</pre>
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<dd><code><a href="../SequentialFileFactory.html#getAlignment()">getAlignment</a></code>&nbsp;in interface&nbsp;<code><a href="../SequentialFileFactory.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFileFactory</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../AbstractSequentialFileFactory.html#getAlignment()">getAlignment</a></code>&nbsp;in class&nbsp;<code><a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">AbstractSequentialFileFactory</a></code></dd>
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<pre class="methodSignature"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a>
public&nbsp;<a href="MappedSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io.mapped">MappedSequentialFileFactory</a>&nbsp;setAlignment&#8203;(int&nbsp;alignment)</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../SequentialFileFactory.html#setAlignment(int)">setAlignment</a></code>&nbsp;in interface&nbsp;<code><a href="../SequentialFileFactory.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFileFactory</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../AbstractSequentialFileFactory.html#setAlignment(int)">setAlignment</a></code>&nbsp;in class&nbsp;<code><a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">AbstractSequentialFileFactory</a></code></dd>
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<pre class="methodSignature">public&nbsp;int&nbsp;calculateBlockSize&#8203;(int&nbsp;bytes)</pre>
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<dd><code><a href="../SequentialFileFactory.html#start()">start</a></code>&nbsp;in interface&nbsp;<code><a href="../SequentialFileFactory.html" title="interface in org.apache.activemq.artemis.core.io">SequentialFileFactory</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../AbstractSequentialFileFactory.html#start()">start</a></code>&nbsp;in class&nbsp;<code><a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">AbstractSequentialFileFactory</a></code></dd>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../AbstractSequentialFileFactory.html#stop()">stop</a></code>&nbsp;in class&nbsp;<code><a href="../AbstractSequentialFileFactory.html" title="class in org.apache.activemq.artemis.core.io">AbstractSequentialFileFactory</a></code></dd>
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