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<div class="subTitle">org.apache.logging.log4j.spi</div>
<h2 title="Interface LoggerContext" class="title">Interface LoggerContext</h2>
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<pre>public interface <a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.24">LoggerContext</a></pre>
<div class="block">Anchor point for logging implementations.</div>
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<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/spi/LoggerContext.html#getExternalContext--">getExternalContext</a></span>()</code>
<div class="block">An anchor for some other context, such as a ClassLoader or ServletContext.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/logging/log4j/spi/ExtendedLogger.html" title="interface in org.apache.logging.log4j.spi">ExtendedLogger</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/spi/LoggerContext.html#getLogger-java.lang.String-">getLogger</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</code>
<div class="block">Returns an ExtendedLogger.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/logging/log4j/spi/ExtendedLogger.html" title="interface in org.apache.logging.log4j.spi">ExtendedLogger</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/spi/LoggerContext.html#getLogger-java.lang.String-org.apache.logging.log4j.message.MessageFactory-">getLogger</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
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<div class="block">Returns an ExtendedLogger.</div>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/spi/LoggerContext.html#getObject-java.lang.String-">getObject</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key)</code>
<div class="block">Retrieve an object by its name.</div>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/spi/LoggerContext.html#hasLogger-java.lang.String-">hasLogger</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</code>
<div class="block">Detects if a Logger with the specified name exists.</div>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/spi/LoggerContext.html#hasLogger-java.lang.String-java.lang.Class-">hasLogger</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
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<div class="block">Detects if a Logger with the specified name and MessageFactory type exists.</div>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/spi/LoggerContext.html#hasLogger-java.lang.String-org.apache.logging.log4j.message.MessageFactory-">hasLogger</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
<a href="../../../../../org/apache/logging/log4j/message/MessageFactory.html" title="interface in org.apache.logging.log4j.message">MessageFactory</a>&nbsp;messageFactory)</code>
<div class="block">Detects if a Logger with the specified name and MessageFactory exists.</div>
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</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/spi/LoggerContext.html#putObject-java.lang.String-java.lang.Object-">putObject</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
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<div class="block">Store an object into the LoggerContext by name for later use.</div>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
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<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;value)</code>
<div class="block">Store an object into the LoggerContext by name for later use if an object is not already stored with that key.</div>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
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<div class="block">Remove an object if it is present.</div>
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<td class="colFirst"><code>default boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/spi/LoggerContext.html#removeObject-java.lang.String-java.lang.Object-">removeObject</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;value)</code>
<div class="block">Remove an object if it is present and the provided object is stored.</div>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.30">getExternalContext</a>()</pre>
<div class="block">An anchor for some other context, such as a ClassLoader or ServletContext.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>The external context.</dd>
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<pre>default&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.37">getObject</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key)</pre>
<div class="block">Retrieve an object by its name.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - The object's key.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.13.0</dd>
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<pre>default&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.48">putObject</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;value)</pre>
<div class="block">Store an object into the LoggerContext by name for later use.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - The object's key.</dd>
<dd><code>value</code> - The object.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The previous object or null.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.13.0</dd>
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<pre>default&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.59">putObjectIfAbsent</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;value)</pre>
<div class="block">Store an object into the LoggerContext by name for later use if an object is not already stored with that key.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - The object's key.</dd>
<dd><code>value</code> - The object.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The previous object or null.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.13.0</dd>
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<div class="block">Remove an object if it is present.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - The object's key.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The object if it was present, null if it was not.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.13.0</dd>
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<pre>default&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.80">removeObject</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;value)</pre>
<div class="block">Remove an object if it is present and the provided object is stored.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - The object's key.</dd>
<dd><code>value</code> - The object.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The object if it was present, null if it was not.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.13.0</dd>
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<pre><a href="../../../../../org/apache/logging/log4j/spi/ExtendedLogger.html" title="interface in org.apache.logging.log4j.spi">ExtendedLogger</a>&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.89">getLogger</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</pre>
<div class="block">Returns an ExtendedLogger.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - The name of the Logger to return.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The logger with the specified name.</dd>
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<pre><a href="../../../../../org/apache/logging/log4j/spi/ExtendedLogger.html" title="interface in org.apache.logging.log4j.spi">ExtendedLogger</a>&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.98">getLogger</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
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<div class="block">Returns an ExtendedLogger.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - The name of the Logger to return.</dd>
<dd><code>messageFactory</code> - The message factory is used only when creating a logger, subsequent use does not change
the logger but will log a warning if mismatched.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The logger with the specified name.</dd>
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<pre>boolean&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.105">hasLogger</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</pre>
<div class="block">Detects if a Logger with the specified name exists.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - The Logger name to search for.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the Logger exists, false otherwise.</dd>
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<pre>boolean&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.114">hasLogger</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
<a href="../../../../../org/apache/logging/log4j/message/MessageFactory.html" title="interface in org.apache.logging.log4j.message">MessageFactory</a>&nbsp;messageFactory)</pre>
<div class="block">Detects if a Logger with the specified name and MessageFactory exists.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - The Logger name to search for.</dd>
<dd><code>messageFactory</code> - The message factory to search for.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the Logger exists, false otherwise.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.5</dd>
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<h4>hasLogger</h4>
<pre>boolean&nbsp;<a href="../../../../../src-html/org/apache/logging/log4j/spi/LoggerContext.html#line.123">hasLogger</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;? extends <a href="../../../../../org/apache/logging/log4j/message/MessageFactory.html" title="interface in org.apache.logging.log4j.message">MessageFactory</a>&gt;&nbsp;messageFactoryClass)</pre>
<div class="block">Detects if a Logger with the specified name and MessageFactory type exists.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - The Logger name to search for.</dd>
<dd><code>messageFactoryClass</code> - The message factory class to search for.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the Logger exists, false otherwise.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.5</dd>
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