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| <div class="subTitle">org.apache.logging.log4j.core.util</div> |
| <h2 title="Class Constants" class="title">Class Constants</h2> |
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| <li>org.apache.logging.log4j.core.util.Constants</li> |
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| <pre>public final class <a href="../../../../../../src-html/org/apache/logging/log4j/core/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 Constants.</div> |
| </li> |
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| <h3>Field Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/logging/log4j/core/util/Constants.html#ENABLE_DIRECT_ENCODERS">ENABLE_DIRECT_ENCODERS</a></span></code> |
| <div class="block">Kill switch for garbage-free Layout behaviour that encodes LogEvents directly into |
| <a href="../../../../../../org/apache/logging/log4j/core/layout/ByteBufferDestination.html" title="interface in org.apache.logging.log4j.core.layout"><code>ByteBufferDestination</code></a>s without creating intermediate temporary |
| Objects.</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/core/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="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/logging/log4j/core/util/Constants.html#ENCODER_BYTE_BUFFER_SIZE">ENCODER_BYTE_BUFFER_SIZE</a></span></code> |
| <div class="block">Default size of ByteBuffers used to encode LogEvents without allocating temporary objects.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/logging/log4j/core/util/Constants.html#ENCODER_CHAR_BUFFER_SIZE">ENCODER_CHAR_BUFFER_SIZE</a></span></code> |
| <div class="block">Size of CharBuffers used by text encoders.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/logging/log4j/core/util/Constants.html#FORMAT_MESSAGES_IN_BACKGROUND">FORMAT_MESSAGES_IN_BACKGROUND</a></span></code> |
| <div class="block">Supports user request LOG4J2-898 to have the option to format a message in the background thread.</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/core/util/Constants.html#FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS">FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS</a></span></code> |
| <div class="block">LOG4J2-2109 if <code>true</code>, MessagePatternConverter will always operate as though</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/core/util/Constants.html#INITIAL_REUSABLE_MESSAGE_SIZE">INITIAL_REUSABLE_MESSAGE_SIZE</a></span></code> |
| <div class="block">Initial StringBuilder size used in RingBuffer LogEvents to store the contents of reusable Messages.</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/core/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> |
| <tr class="altColor"> |
| <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/core/util/Constants.html#JNDI_CONTEXT_NAME">JNDI_CONTEXT_NAME</a></span></code> |
| <div class="block">JNDI context name string literal.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <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/core/util/Constants.html#LOG4J_CONTEXT_SELECTOR">LOG4J_CONTEXT_SELECTOR</a></span></code> |
| <div class="block">Name of the system property to use to identify the ContextSelector Class.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <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/core/util/Constants.html#LOG4J_DEFAULT_STATUS_LEVEL">LOG4J_DEFAULT_STATUS_LEVEL</a></span></code> |
| <div class="block">Property name for the default status (internal log4j logging) level to use if not specified in configuration.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <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/core/util/Constants.html#LOG4J_LOG_EVENT_FACTORY">LOG4J_LOG_EVENT_FACTORY</a></span></code> |
| <div class="block">Name of the system property to use to identify the LogEvent factory.</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/core/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> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/logging/log4j/core/util/Constants.html#MILLIS_IN_SECONDS">MILLIS_IN_SECONDS</a></span></code> |
| <div class="block">Number of milliseconds in a second.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| </a> |
| <h3>Method Summary</h3> |
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| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<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></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
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| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a name="LOG4J_LOG_EVENT_FACTORY"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>LOG4J_LOG_EVENT_FACTORY</h4> |
| <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/core/util/Constants.html#line.29">LOG4J_LOG_EVENT_FACTORY</a></pre> |
| <div class="block">Name of the system property to use to identify the LogEvent factory.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../constant-values.html#org.apache.logging.log4j.core.util.Constants.LOG4J_LOG_EVENT_FACTORY">Constant Field Values</a></dd> |
| </dl> |
| </li> |
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| <a name="LOG4J_CONTEXT_SELECTOR"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>LOG4J_CONTEXT_SELECTOR</h4> |
| <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/core/util/Constants.html#line.34">LOG4J_CONTEXT_SELECTOR</a></pre> |
| <div class="block">Name of the system property to use to identify the ContextSelector Class.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../constant-values.html#org.apache.logging.log4j.core.util.Constants.LOG4J_CONTEXT_SELECTOR">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="LOG4J_DEFAULT_STATUS_LEVEL"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>LOG4J_DEFAULT_STATUS_LEVEL</h4> |
| <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/core/util/Constants.html#line.39">LOG4J_DEFAULT_STATUS_LEVEL</a></pre> |
| <div class="block">Property name for the default status (internal log4j logging) level to use if not specified in configuration.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../constant-values.html#org.apache.logging.log4j.core.util.Constants.LOG4J_DEFAULT_STATUS_LEVEL">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="JNDI_CONTEXT_NAME"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>JNDI_CONTEXT_NAME</h4> |
| <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/core/util/Constants.html#line.44">JNDI_CONTEXT_NAME</a></pre> |
| <div class="block">JNDI context name string literal.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../constant-values.html#org.apache.logging.log4j.core.util.Constants.JNDI_CONTEXT_NAME">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="MILLIS_IN_SECONDS"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>MILLIS_IN_SECONDS</h4> |
| <pre>public static final int <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.49">MILLIS_IN_SECONDS</a></pre> |
| <div class="block">Number of milliseconds in a second.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../constant-values.html#org.apache.logging.log4j.core.util.Constants.MILLIS_IN_SECONDS">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="FORMAT_MESSAGES_IN_BACKGROUND"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>FORMAT_MESSAGES_IN_BACKGROUND</h4> |
| <pre>public static final boolean <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.54">FORMAT_MESSAGES_IN_BACKGROUND</a></pre> |
| <div class="block">Supports user request LOG4J2-898 to have the option to format a message in the background thread.</div> |
| </li> |
| </ul> |
| <a name="FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS</h4> |
| <pre>public static final boolean <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.63">FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS</a></pre> |
| <div class="block">LOG4J2-2109 if <code>true</code>, MessagePatternConverter will always operate as though |
| <pre>%m{nolookups}</pre> is configured.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>2.10</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="IS_WEB_APP"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>IS_WEB_APP</h4> |
| <pre>public static final boolean <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.71">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> |
| <a name="ENABLE_THREADLOCALS"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>ENABLE_THREADLOCALS</h4> |
| <pre>public static final boolean <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.81">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/core/util/Constants.html#IS_WEB_APP"><code>web apps</code></a>, disable by setting system property |
| "log4j2.enable.threadlocals" to "false".</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>2.6</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="ENABLE_DIRECT_ENCODERS"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>ENABLE_DIRECT_ENCODERS</h4> |
| <pre>public static final boolean <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.94">ENABLE_DIRECT_ENCODERS</a></pre> |
| <div class="block">Kill switch for garbage-free Layout behaviour that encodes LogEvents directly into |
| <a href="../../../../../../org/apache/logging/log4j/core/layout/ByteBufferDestination.html" title="interface in org.apache.logging.log4j.core.layout"><code>ByteBufferDestination</code></a>s without creating intermediate temporary |
| Objects. |
| <p> |
| <code>True</code> by default iff all loggers are asynchronous because system property |
| <code>Log4jContextSelector</code> is set to <code>org.apache.logging.log4j.core.async.AsyncLoggerContextSelector</code>. |
| Disable by setting system property "log4j2.enable.direct.encoders" to "false".</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>2.6</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="INITIAL_REUSABLE_MESSAGE_SIZE"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>INITIAL_REUSABLE_MESSAGE_SIZE</h4> |
| <pre>public static final int <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.106">INITIAL_REUSABLE_MESSAGE_SIZE</a></pre> |
| <div class="block">Initial StringBuilder size used in RingBuffer LogEvents to store the contents of reusable Messages. |
| <p> |
| The default value is , users can override with system property "log4j.initialReusableMsgSize". |
| </p></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>2.6</dd> |
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| <pre>public static final int <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.117">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". |
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| <pre>public static final int <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.126">ENCODER_CHAR_BUFFER_SIZE</a></pre> |
| <div class="block">Size of CharBuffers used by text encoders. |
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| The default value is , users can override with system property "log4j.encoder.charBufferSize". |
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| <pre>public static final int <a href="../../../../../../src-html/org/apache/logging/log4j/core/util/Constants.html#line.136">ENCODER_BYTE_BUFFER_SIZE</a></pre> |
| <div class="block">Default size of ByteBuffers used to encode LogEvents without allocating temporary objects. |
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| The default value is , users can override with system property "log4j.encoder.byteBufferSize". |
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