Package org.apache.logging.log4j.util

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.
Lazy<T>	Provides a lazily-initialized value from a Supplier<T>.
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.
Cast
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.
LazyBoolean
LazyUtil
LazyUtil.Constant<T>
LazyUtil.PureLazy<T>
LazyUtil.SafeLazy<T>
LazyUtil.WeakConstant<T>
LoaderUtil	Consider this class private. Utility class for ClassLoaders.
LoaderUtil.ThreadContextClassLoaderGetter
LoaderUtil.UrlResource	URL and ClassLoader pair.
OsgiServiceLocator
PrivateSecurityManagerStackTraceUtil	Internal utility to share a fast implementation of #getCurrentStackTrace() with the java 9 implementation of StackLocator.
PrivateSecurityManagerStackTraceUtil.PrivateSecurityManager
ProcessIdUtil	Provides the PID of the current JVM.
PropertiesPropertySource	PropertySource backed by a Properties instance.
PropertiesUtil	Consider this class private.
PropertiesUtil.Environment	Provides support for looking up global configuration properties via environment variables, property files, and system properties, in three variations:
PropertyFilePropertySource	PropertySource backed by a properties file.
PropertySource.Comparator	Comparator for ordering PropertySource instances by priority.
PropertySource.Util	Utility methods useful for PropertySource implementations.
ProviderActivator	Utility class to register Log4j2 providers in an OSGI environment.
ProviderUtil	Consider this class private.
ServiceLoaderUtil	An utility class to retrieve services in a safe way.
ServiceLoaderUtil.ServiceLoaderSpliterator<S>
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.
Unbox.State
Unbox.WebSafeState	State implementation that only puts JDK classes in ThreadLocals, so this is safe to be used from web applications.

Enum Summary

Enum	Description
PropertiesUtil.TimeUnit
Timer.Status

Exception Summary

Exception	Description
InternalException	Exception thrown when an error occurs while accessing internal resources.

Annotation Types Summary

Annotation Type	Description
InternalApi	Indicates that the annotated element is considered an internal API to Log4j and should not be used by external code.
PerformanceSensitive	Indicates that a particular annotated construct was written with certain performance constraints in mind that should be considered when modifying or testing.