Package org.apache.logging.log4j.core.lookup

@Export @Version("2.24.0") package org.apache.logging.log4j.core.lookup

Log4j 2 Lookups. These are used in variable interpolation in various configuration attributes. StrLookup plugins should use the plugin category Lookup.

Related Packages

Package	Description
org.apache.logging.log4j.core	Implementation of Log4j 2.

Class	Description
AbstractConfigurationAwareLookup	StrLookup that is ConfigurationAware.
AbstractLookup	A default lookup for others to extend.
ConfigurationStrSubstitutor	RuntimeStrSubstitutor is a StrSubstitutor which only supports recursive evaluation of lookups.
ContextMapLookup	Looks up keys from the context.
DateLookup	Formats the current date or the date in the LogEvent.
EnvironmentLookup	Looks up keys from environment variables.
EventLookup	Looks up values from the log event.
Interpolator	Proxies all the other StrLookups.
JavaLookup	Looks up keys related to Java: Java version, JRE version, VM version, and so on.
JmxRuntimeInputArgumentsLookup	Maps JVM input arguments (but not main arguments) using JMX to acquire JVM arguments.
JndiLookup	Looks up keys from JNDI resources.
Log4jLookup	Lookup properties of Log4j
LookupResult
LowerLookup	Converts values to lower case.
MainMapLookup	A map-based lookup for main arguments.
MapLookup	A map-based lookup.
MarkerLookup	Looks-up markers.
PropertiesLookup	A lookup designed for Properties defined in the configuration.
ResourceBundleLookup	Looks up keys from resource bundles.
RuntimeStrSubstitutor	RuntimeStrSubstitutor is a StrSubstitutor which only supports evaluation of top-level lookups.
StrLookup	Lookup a String key to a String value.
StrMatcher	A matcher class that can be queried to determine if a character array portion matches.
StrSubstitutor	Substitutes variables within a string by values.
StructuredDataLookup	Looks up keys from StructuredDataMessage log messages.
SystemPropertiesLookup	Looks up keys from system properties.
UpperLookup	Converts values to upper case.