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| <pre>public final class <a href="../../../../../src-html/org/apache/logging/log4j/util/Constants.html#line.24">Constants</a> |
| extends <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></pre> |
| <div class="block">Log4j API Constants.</div> |
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| <dd>2.6.2</dd> |
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| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/util/Constants.html#ENABLE_THREADLOCALS">ENABLE_THREADLOCALS</a></span></code> |
| <div class="block">Kill switch for object pooling in ThreadLocals that enables much of the LOG4J2-1270 no-GC behaviour.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/util/Constants.html#IS_WEB_APP">IS_WEB_APP</a></span></code> |
| <div class="block"><code>true</code> if we think we are running in a web container, based on the boolean value of system property |
| "log4j2.is.webapp", or (if this system property is not set) whether the <code>javax.servlet.Servlet</code> class |
| is present in the classpath.</div> |
| </td> |
| </tr> |
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| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/util/Constants.html#JAVA_MAJOR_VERSION">JAVA_MAJOR_VERSION</a></span></code> </td> |
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| <td class="colFirst"><code>static <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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/util/Constants.html#LOG4J2_DEBUG">LOG4J2_DEBUG</a></span></code> |
| <div class="block">Name of the system property that will turn on TRACE level internal log4j2 status logging.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/logging/log4j/util/Constants.html#MAX_REUSABLE_MESSAGE_SIZE">MAX_REUSABLE_MESSAGE_SIZE</a></span></code> |
| <div class="block">Maximum size of the StringBuilders used in RingBuffer LogEvents to store the contents of reusable Messages.</div> |
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| <pre>public static final boolean <a href="../../../../../src-html/org/apache/logging/log4j/util/Constants.html#line.30">IS_WEB_APP</a></pre> |
| <div class="block"><code>true</code> if we think we are running in a web container, based on the boolean value of system property |
| "log4j2.is.webapp", or (if this system property is not set) whether the <code>javax.servlet.Servlet</code> class |
| is present in the classpath.</div> |
| </li> |
| </ul> |
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| <h4>ENABLE_THREADLOCALS</h4> |
| <pre>public static final boolean <a href="../../../../../src-html/org/apache/logging/log4j/util/Constants.html#line.40">ENABLE_THREADLOCALS</a></pre> |
| <div class="block">Kill switch for object pooling in ThreadLocals that enables much of the LOG4J2-1270 no-GC behaviour. |
| <p> |
| <code>True</code> for non-<a href="../../../../../org/apache/logging/log4j/util/Constants.html#IS_WEB_APP"><code>web apps</code></a>, disable by setting system property |
| "log4j2.enable.threadlocals" to "false". |
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| <pre>public static final int <a href="../../../../../src-html/org/apache/logging/log4j/util/Constants.html#line.43">JAVA_MAJOR_VERSION</a></pre> |
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| <pre>public static final int <a href="../../../../../src-html/org/apache/logging/log4j/util/Constants.html#line.54">MAX_REUSABLE_MESSAGE_SIZE</a></pre> |
| <div class="block">Maximum size of the StringBuilders used in RingBuffer LogEvents to store the contents of reusable Messages. |
| After a large message has been delivered to the appenders, the StringBuilder is trimmed to this size. |
| <p> |
| The default value is , which allows the StringBuilder to resize three times from its initial size. |
| Users can override with system property "log4j.maxReusableMsgSize". |
| </p></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>2.9</dd> |
| </dl> |
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| <pre>public static final <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> <a href="../../../../../src-html/org/apache/logging/log4j/util/Constants.html#line.65">LOG4J2_DEBUG</a></pre> |
| <div class="block">Name of the system property that will turn on TRACE level internal log4j2 status logging. |
| <p> |
| If system property "log4j2.debug" is defined, regardless of the property value, all internal log4j2 logging will be |
| printed to the console. The presence of this system property overrides any value set in the configuration's |
| <code><Configuration status="<level>" ...></code> status attribute, as well as any value set for |
| system property <code>org.apache.logging.log4j.simplelog.StatusLogger.level</code>. |
| </p></div> |
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| <dd><a href="../../../../../constant-values.html#org.apache.logging.log4j.util.Constants.LOG4J2_DEBUG">Constant Field Values</a></dd> |
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