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<h1 title="Package" class="title">Package org.apache.log4j.spi</h1>
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<div class="block">Contains part of the System Programming Interface (SPI) needed to
extend log4j.</div>
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<th class="colFirst" scope="col">Interface</th>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/AppenderAttachable.html" title="interface in org.apache.log4j.spi">AppenderAttachable</a></td>
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<div class="block">Interface for attaching appenders to objects.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/Configurator.html" title="interface in org.apache.log4j.spi">Configurator</a></td>
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<div class="block">Implemented by classes capable of configuring log4j using a URL.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/ErrorCode.html" title="interface in org.apache.log4j.spi">ErrorCode</a></td>
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<div class="block">This interface defines commonly encoutered error codes.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi">ErrorHandler</a></td>
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<div class="block">Appenders may delegate their error handling to
<code>ErrorHandlers</code>.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/HierarchyEventListener.html" title="interface in org.apache.log4j.spi">HierarchyEventListener</a></td>
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<div class="block">Listen to events occuring within a <a href="../../../../org/apache/log4j/Hierarchy.html" title="class in org.apache.log4j"><code>Hierarchy</code></a>.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/LoggerFactory.html" title="interface in org.apache.log4j.spi">LoggerFactory</a></td>
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<div class="block">Implement this interface to create new instances of Logger or
a sub-class of Logger.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/LoggerRepository.html" title="interface in org.apache.log4j.spi">LoggerRepository</a></td>
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<div class="block">A <code>LoggerRepository</code> is used to create and retrieve
<code>Loggers</code>.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/OptionHandler.html" title="interface in org.apache.log4j.spi">OptionHandler</a></td>
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<div class="block">A string based interface to configure package components.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/RepositorySelector.html" title="interface in org.apache.log4j.spi">RepositorySelector</a></td>
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<div class="block">The <code>LogManager</code> uses one (and only one)
<code>RepositorySelector</code> implementation to select the
<a href="../../../../org/apache/log4j/spi/LoggerRepository.html" title="interface in org.apache.log4j.spi"><code>LoggerRepository</code></a> for a particular application context.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/ThrowableRenderer.html" title="interface in org.apache.log4j.spi">ThrowableRenderer</a></td>
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<div class="block">Implemented by classes that render instances of
java.lang.Throwable (exceptions and errors)
into a string representation.</div>
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<div class="block">Implemented by logger repositories that support configurable
rendering of Throwables.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/TriggeringEventEvaluator.html" title="interface in org.apache.log4j.spi">TriggeringEventEvaluator</a></td>
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<div class="block">Implementions of this interface allow certain appenders to decide
when to perform an appender specific action.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/DefaultRepositorySelector.html" title="class in org.apache.log4j.spi">DefaultRepositorySelector</a></td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</a></td>
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<div class="block">Users should extend this class to implement customized logging
event filtering.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/LocationInfo.html" title="class in org.apache.log4j.spi">LocationInfo</a></td>
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<div class="block">The internal representation of caller location information.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</a></td>
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<div class="block">The internal representation of logging events.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/NOPLogger.html" title="class in org.apache.log4j.spi">NOPLogger</a></td>
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<div class="block">No-operation implementation of Logger used by NOPLoggerRepository.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/NOPLoggerRepository.html" title="class in org.apache.log4j.spi">NOPLoggerRepository</a></td>
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<div class="block">No-operation implementation of LoggerRepository which is used when
LogManager.repositorySelector is erroneously nulled during class reloading.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/RootCategory.html" title="class in org.apache.log4j.spi">RootCategory</a></td>
<td class="colLast">Deprecated
<div class="block"><span class="deprecationComment">Replaced by <a href="../../../../org/apache/log4j/spi/RootLogger.html" title="class in org.apache.log4j.spi"><code>RootLogger</code></a>.</span></div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/RootLogger.html" title="class in org.apache.log4j.spi">RootLogger</a></td>
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<div class="block">RootLogger sits at the top of the logger hierachy.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/spi/ThrowableInformation.html" title="class in org.apache.log4j.spi">ThrowableInformation</a></td>
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<div class="block">ThrowableInformation is log4j's internal representation of
throwables.</div>
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<h2 title="Package org.apache.log4j.spi Description">Package org.apache.log4j.spi Description</h2>
<div class="block">Contains part of the System Programming Interface (SPI) needed to
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