Package org.apache.logging.log4j.util

Internal utility classes for the Log4j 2 API. Note that the use of any classes in this package is not supported. There are no guarantees for binary or logical compatibility in this package.

Interface Summary

Interface	Description
BiConsumer<K,V>	An operation that accepts two input arguments and returns no result.
IndexedReadOnlyStringMap	An extension of ReadOnlyStringMap that imposes a total ordering on its keys.
IndexedStringMap	An extension of StringMap that imposes a total ordering on its keys.
MessageSupplier	Classes implementing this interface know how to supply Messages.
MultiFormatStringBuilderFormattable	A Message that can render itself in more than one way.
PropertySource	A source for global configuration properties.
ReadOnlyStringMap	A read-only collection of String keys mapped to values of arbitrary type.
StringBuilderFormattable	Objects that implement this interface can be converted to text, ideally without allocating temporary objects.
StringMap	Exposes methods to add and remove key-value pairs to and from ReadOnlyStringMap.
Supplier<T>	Consider this class private. Classes implementing this interface know how to supply a value.
TriConsumer<K,V,S>	An operation that accepts three input arguments and returns no result.

Class Summary

Class	Description
Activator	Consider this class private. OSGi bundle activator.
Base64Util	Base64 encodes Strings.
Chars	Consider this class private.
Constants	Log4j API Constants.
EnglishEnums	Consider this class private.
EnvironmentPropertySource	PropertySource implementation that uses environment variables as a source.
FilteredObjectInputStream	Extends ObjectInputStream to only allow some built-in Log4j classes and caller-specified classes to be deserialized.
LambdaUtil	Utility class for lambda support.
LoaderUtil	Consider this class private. Utility class for ClassLoaders.
ProcessIdUtil
PropertiesPropertySource	PropertySource backed by a Properties instance.
PropertiesUtil	Consider this class private.
PropertyFilePropertySource	PropertySource backed by a properties file.
PropertySource.Comparator	Comparator for ordering PropertySource instances by priority.
PropertySource.Util	Utility methods useful for PropertySource implementations.
ProviderUtil	Consider this class private. Utility class for Log4j Providers.
SortedArrayStringMap	Consider this class private. Array-based implementation of the ReadOnlyStringMap interface.
StackLocator	Consider this class private. Provides various methods to determine the caller class.
StackLocatorUtil	Consider this class private. Provides various methods to determine the caller class.
StringBuilders	Consider this class private.
Strings	Consider this class private.
SystemPropertiesPropertySource	PropertySource backed by the current system properties.
Timer	Primarily used in unit tests, but can be used to track elapsed time for a request or portion of any other operation so long as all the timer methods are called on the same thread in which it was started.
Unbox	Utility for preventing primitive parameter values from being auto-boxed.

Enum Summary

Enum	Description
Timer.Status

Annotation Types Summary

Annotation Type	Description
PerformanceSensitive	Indicates that a particular annotated construct was written with certain performance constraints in mind that should be considered when modifying or testing.