Package org.apache.logging.log4j.util
Class Constants
java.lang.Object
org.apache.logging.log4j.util.Constants
Log4j API Constants.
- Since:
- 2.6.2
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Field Summary
Modifier and TypeFieldDescriptionstatic final byte[]
The empty array.static final Object[]
The empty array.static final boolean
Kill switch for object pooling in ThreadLocals that enables much of the LOG4J2-1270 no-GC behaviour.static final boolean
true
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 thejavax.servlet.Servlet
class is present in the classpath.static final int
Java major version.static final String
Name of the system property that will turn on TRACE level internal log4j2 status logging.static final int
Maximum size of the StringBuilders used in RingBuffer LogEvents to store the contents of reusable Messages. -
Method Summary
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Field Details
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IS_WEB_APP
public static final boolean IS_WEB_APPtrue
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 thejavax.servlet.Servlet
class is present in the classpath. -
ENABLE_THREADLOCALS
public static final boolean ENABLE_THREADLOCALSKill switch for object pooling in ThreadLocals that enables much of the LOG4J2-1270 no-GC behaviour.True
for non-web apps
, disable by setting system property "log4j2.enable.threadlocals" to "false". -
JAVA_MAJOR_VERSION
public static final int JAVA_MAJOR_VERSIONJava major version. -
MAX_REUSABLE_MESSAGE_SIZE
public static final int MAX_REUSABLE_MESSAGE_SIZEMaximum 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.The default value is 518, which allows the StringBuilder to resize three times from its initial size. Users can override with system property "log4j.maxReusableMsgSize".
- Since:
- 2.9
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LOG4J2_DEBUG
Name of the system property that will turn on TRACE level internal log4j2 status logging.If system property "log4j2.debug" is either defined empty or its value equals to
true
(ignoring case), all internal log4j2 logging will be printed to the console. The presence of this system property overrides any value set in the configuration's<Configuration status="<level>" ...>
status attribute, as well as any value set for system propertyorg.apache.logging.log4j.simplelog.StatusLogger.level
.- See Also:
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EMPTY_OBJECT_ARRAY
The empty array. -
EMPTY_BYTE_ARRAY
public static final byte[] EMPTY_BYTE_ARRAYThe empty array.
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