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<h1>CyclicBuffer Class Reference</h1><a href="classlog4cxx_1_1helpers_1_1CyclicBuffer-members.html">List of all members.</a><table border=0 cellpadding=0 cellspacing=0>
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<tr><td colspan=2><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classlog4cxx_1_1helpers_1_1CyclicBuffer.html#a0">CyclicBuffer</a> (int maxSize)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>void&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classlog4cxx_1_1helpers_1_1CyclicBuffer.html#a2">add</a> (const <a class="el" href="classlog4cxx_1_1helpers_1_1ObjectPtrT.html">spi::LoggingEventPtr</a> &amp;event)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="classlog4cxx_1_1helpers_1_1ObjectPtrT.html">spi::LoggingEventPtr</a>&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classlog4cxx_1_1helpers_1_1CyclicBuffer.html#a3">get</a> (int i)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="classlog4cxx_1_1helpers_1_1ObjectPtrT.html">spi::LoggingEventPtr</a>&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classlog4cxx_1_1helpers_1_1CyclicBuffer.html#a5">get</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>int&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classlog4cxx_1_1helpers_1_1CyclicBuffer.html#a6">length</a> () const </td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>void&nbsp;</td><td class="memItemRight" valign=bottom><a class="el" href="classlog4cxx_1_1helpers_1_1CyclicBuffer.html#a7">resize</a> (int newSize)</td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
<a class="el" href="classlog4cxx_1_1helpers_1_1CyclicBuffer.html">CyclicBuffer</a> is used by other appenders to hold <a class="el" href="classlog4cxx_1_1spi_1_1LoggingEvent.html">LoggingEvents</a> for immediate or differed display. <p>
This buffer gives read access to any element in the buffer not just the first or last element.
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<hr><h2>Constructor &amp; Destructor Documentation</h2>
<a class="anchor" name="a0" doxytag="log4cxx::helpers::CyclicBuffer::CyclicBuffer" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="classlog4cxx_1_1helpers_1_1CyclicBuffer.html">CyclicBuffer</a> </td>
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<td class="md" nowrap valign="top">int&nbsp;</td>
<td class="mdname1" valign="top" nowrap> <em>maxSize</em> </td>
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Instantiate a new <a class="el" href="classlog4cxx_1_1helpers_1_1CyclicBuffer.html">CyclicBuffer</a> of at most <code>maxSize</code> events. The <code>maxSize</code> argument must a positive integer. <dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign=top><em>maxSize</em>&nbsp;</td><td>The maximum number of elements in the buffer. </td></tr>
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<dl compact><dt><b>Exceptions:</b></dt><dd>
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<tr><td valign=top><em>IllegalArgumentException</em>&nbsp;</td><td>if <code>maxSize</code> is negative.</td></tr>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="a2" doxytag="log4cxx::helpers::CyclicBuffer::add" ></a><p>
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<td class="md" nowrap valign="top"> void add </td>
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<td class="md" nowrap valign="top">const <a class="el" href="classlog4cxx_1_1helpers_1_1ObjectPtrT.html">spi::LoggingEventPtr</a> &amp;&nbsp;</td>
<td class="mdname1" valign="top" nowrap> <em>event</em> </td>
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Add an <code>event</code> as the last event in the buffer. </td>
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<a class="anchor" name="a5" doxytag="log4cxx::helpers::CyclicBuffer::get" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="classlog4cxx_1_1helpers_1_1ObjectPtrT.html">spi::LoggingEventPtr</a> get </td>
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Get the oldest (first) element in the buffer. The oldest element is removed from the buffer. </td>
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<a class="anchor" name="a3" doxytag="log4cxx::helpers::CyclicBuffer::get" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="classlog4cxx_1_1helpers_1_1ObjectPtrT.html">spi::LoggingEventPtr</a> get </td>
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<td class="mdname1" valign="top" nowrap> <em>i</em> </td>
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Get the <em>i</em>th oldest event currently in the buffer. If <em>i</em> is outside the range 0 to the number of elements currently in the buffer, then <code>null</code> is returned. </td>
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<a class="anchor" name="a6" doxytag="log4cxx::helpers::CyclicBuffer::length" ></a><p>
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<td class="md" nowrap valign="top"> int length </td>
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<td class="md" nowrap> const<code> [inline]</code></td>
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Get the number of elements in the buffer. This number is guaranteed to be in the range 0 to <code>maxSize</code> (inclusive). </td>
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<a class="anchor" name="a7" doxytag="log4cxx::helpers::CyclicBuffer::resize" ></a><p>
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<td class="md" nowrap valign="top"> void resize </td>
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Resize the cyclic buffer to <code>newSize</code>. <dl compact><dt><b>Exceptions:</b></dt><dd>
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<hr>The documentation for this class was generated from the following files:<ul>
<li>cyclicbuffer.h<li>cyclicbuffer.cpp</ul>
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