All Classes

Class	Description
AbstractLogger	Base implementation of a Logger.
AbstractLoggerAdapter<L>	Provides an abstract base class to use for implementing LoggerAdapter.
AbstractMessageFactory	Provides an abstract superclass for MessageFactory2 implementations with default implementations (and for MessageFactory by extension).
Activator	Consider this class private. OSGi bundle activator.
AsynchronouslyFormattable	Annotation that signals to asynchronous logging components that messages of this type can safely be passed to a background thread without calling Message.getFormattedMessage() first.
Base64Util	Base64 encodes Strings.
BiConsumer<K,V>	An operation that accepts two input arguments and returns no result.
BridgeAware	Extended interface to allow bridges between logging systems to convey the correct location information.
Chars	Consider this class private.
CleanableThreadContextMap	Extension service provider interface to implement additional custom MDC behavior for ThreadContext.
CloseableThreadContext	Adds entries to the stack or map and them removes them when the object is closed, e.g.
CloseableThreadContext.Instance
Constants	Log4j API Constants.
CopyOnWrite	Marker interface indicating that the implementing class is a copy-on-write data structure.
DefaultFlowMessageFactory	Default factory for flow messages.
DefaultLogBuilder	Collects data for a log event and then logs it.
DefaultThreadContextMap	The actual ThreadContext Map.
DefaultThreadContextStack	A copy-on-write thread-safe variant of org.apache.logging.log4j.spi.ThreadContextStack in which all mutative operations (add, pop, and so on) are implemented by making a fresh copy of the underlying list.
EnglishEnums	Consider this class private.
EntryMessage	Entry flow messages
EnvironmentPropertySource	PropertySource implementation that uses environment variables as a source.
EventLogger	Logs "Events" that are represented as StructuredDataMessage.
ExitMessage	Exit flow messages
ExtendedLogger	Extends the Logger interface with methods that facilitate implementing or extending Loggers.
ExtendedLoggerWrapper	Wrapper class that exposes the protected AbstractLogger methods to support wrapped loggers.
FilteredObjectInputStream	Extends ObjectInputStream to only allow some built-in Log4j classes and caller-specified classes to be deserialized.
FlowMessage	Flow messages
FlowMessageFactory	Creates flow messages.
FormattedMessage	Handles messages that contain a format String.
FormattedMessageFactory	Creates FormattedMessage instances for MessageFactory2 methods (and MessageFactory by extension.)
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.
LambdaUtil	Utility class for lambda support.
Level	Levels used for identifying the severity of an event.
LoaderUtil	Consider this class private. Utility class for ClassLoaders.
LocalizedMessage	Provides some level of compatibility with Log4j 1.x and convenience but is not the recommended way to Localize messages.
LocalizedMessageFactory	Creates FormattedMessage instances for MessageFactory2 methods (and MessageFactory by extension.)
LocationAwareLogger	Logger that accepts the location of the caller.
LogBuilder	Interface for constructing log events before logging them.
Logger	This is the central interface in the log4j package.
LoggerAdapter<L>	A basic registry for LoggerContext objects and their associated external Logger classes.
LoggerContext	Anchor point for logging implementations.
LoggerContextFactory	Implemented by factories that create LoggerContext objects.
LoggerContextKey	Deprecated. with no replacement - no longer used
LoggerContextShutdownAware	Interface allowing interested classes to know when a LoggerContext has shutdown - if the LoggerContext implementation provides a way to register listeners.
LoggerContextShutdownEnabled	LoggerContexts implementing this are able register LoggerContextShutdownAware classes.
LoggerNameAwareMessage	Message that is interested in the name of the Logger.
LoggerRegistry<T extends ExtendedLogger>	Convenience class to be used by LoggerContext implementations.
LoggerRegistry.ConcurrentMapFactory<T extends ExtendedLogger>	Generates ConcurrentHashMaps for use by the registry to store the Loggers.
LoggerRegistry.MapFactory<T extends ExtendedLogger>	Interface to control the data structure used by the registry to store the Loggers.
LoggerRegistry.WeakMapFactory<T extends ExtendedLogger>	Generates WeakHashMaps for use by the registry to store the Loggers.
LoggingException	Exception thrown when an error occurs while logging.
LogManager	The anchor point for the Log4j logging system.
LogManagerStatus	Keeps track of LogManager initialization status;
MapMessage<M extends MapMessage<M,V>,V>	Represents a Message that consists of a Map.
MapMessage.MapFormat	When set as the format specifier causes the Map to be formatted as XML.
Marker	Markers are objects that are used to add easily filterable information to log messages.
MarkerManager	Applications create Markers by using the Marker Manager.
MarkerManager.Log4jMarker	Consider this class private, it is only public to satisfy Jackson for XML and JSON IO.
Message	An interface for various Message implementations that can be logged.
MessageCollectionMessage<T>	A Message that is a collection of Messages.
MessageFactory	Creates messages.
MessageFactory2	Creates messages.
MessageFactory2Adapter	Adapts a legacy MessageFactory to the new MessageFactory2 interface.
MessageFormatMessage	Handles messages that consist of a format string conforming to java.text.MessageFormat.
MessageFormatMessageFactory	Creates FormattedMessage instances for MessageFactory2 methods (and MessageFactory by extension.)
MessageSupplier	Classes implementing this interface know how to supply Messages.
MultiformatMessage	A Message that can render itself in more than one way.
MultiFormatStringBuilderFormattable	A Message that can render itself in more than one way.
MutableThreadContextStack	TODO
NoOpThreadContextMap	ThreadContextMap implementation used when either of system properties disableThreadContextMap or .
ObjectArrayMessage	Handles messages that contain an Object[].
ObjectMessage	Handles messages that contain an Object.
ObjectThreadContextMap	Extension service provider interface to allow putting Object values in the ThreadContext.
OsgiServiceLocator
ParameterConsumer<S>	An operation that accepts two input arguments and returns no result.
ParameterizedMessage	A Message accepting argument placeholders in the formatting pattern.
ParameterizedMessageFactory	Creates FormattedMessage instances for MessageFactory2 methods (and MessageFactory by extension.)
ParameterizedNoReferenceMessageFactory	Creates FormattedMessage instances for MessageFactory2 methods (and MessageFactory by extension.)
ParameterVisitable	Allows message parameters to be iterated over without any allocation or memory copies.
PerformanceSensitive	Indicates that a particular annotated construct was written with certain performance constraints in mind that should be considered when modifying or testing.
ProcessIdUtil
PropertiesPropertySource	PropertySource backed by a Properties instance.
PropertiesUtil	Consider this class private.
PropertyFilePropertySource	PropertySource backed by a properties file.
PropertySource	A source for global configuration properties.
PropertySource.Comparator	Comparator for ordering PropertySource instances by priority.
PropertySource.Util	Utility methods useful for PropertySource implementations.
Provider	Model class for a Log4j 2 provider.
ProviderActivator	Utility class to register Log4j2 providers in an OSGI environment.
ProviderUtil	Consider this class private. Utility class for Log4j Providers.
ReadOnlyStringMap	A read-only collection of String keys mapped to values of arbitrary type.
ReadOnlyThreadContextMap	Read-only view of the data structure that implements MDC behavior for ThreadContext.
ReusableMessage	Messages implementing this interface are reused between logging calls.
ReusableMessageFactory	Implementation of the MessageFactory interface that avoids allocating temporary objects where possible.
ReusableObjectMessage	Mutable Message wrapper around an Object message.
ReusableParameterizedMessage	Reusable parameterized message.
ReusableSimpleMessage	Mutable Message wrapper around a String message.
ServiceLoaderUtil	This class should be considered internal.
SimpleLogger	This is the default logger that is used when no suitable logging implementation is available.
SimpleLoggerContext	A simple LoggerContext implementation.
SimpleLoggerContextFactory	Simple and stateless LoggerContextFactory.
SimpleMessage	The simplest possible implementation of Message.
SimpleMessageFactory	Creates FormattedMessage instances for MessageFactory2 methods (and MessageFactory by extension.)
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.
StandardLevel	Standard Logging Levels as an enumeration for use internally.
StatusConsoleListener	StatusListener that writes to the console.
StatusData	The Status data.
StatusListener	Interface that allows implementers to be notified of events in the logging system.
StatusLogger	Records events that occur in the logging system.
StringBuilderFormattable	Objects that implement this interface can be converted to text, ideally without allocating temporary objects.
StringBuilders	Consider this class private.
StringFormattedMessage	Handles messages that consist of a format string conforming to Formatter.
StringFormatterMessageFactory	Creates FormattedMessage instances for MessageFactory2 methods (and MessageFactory by extension.)
StringMap	Exposes methods to add and remove key-value pairs to and from ReadOnlyStringMap.
StringMapMessage	A StringMapMessage typed to String-only values.
Strings	Consider this class private.
StructuredDataCollectionMessage	A collection of StructuredDataMessages.
StructuredDataId	The StructuredData identifier.
StructuredDataMessage	Represents a Message that conforms to an RFC 5424 StructuredData element along with the syslog message.
StructuredDataMessage.Format	Supported formats.
Supplier<T>	Consider this class private. Classes implementing this interface know how to supply a value.
SystemPropertiesPropertySource	PropertySource backed by the current system properties.
Terminable	Interface to be implemented by LoggerContext's that provide a shutdown method.
ThreadContext	The ThreadContext allows applications to store information either in a Map or a Stack.
ThreadContext.ContextStack	The ThreadContext Stack interface.
ThreadContextMap	Service provider interface to implement custom MDC behavior for ThreadContext.
ThreadContextMap2	Extension service provider interface to implement additional custom MDC behavior for ThreadContext.
ThreadContextMapFactory	Creates the ThreadContextMap instance used by the ThreadContext.
ThreadContextStack	Service provider interface to implement custom NDC behavior for ThreadContext.
ThreadDumpMessage	Captures information about all running Threads.
ThreadDumpMessage.ThreadInfoFactory	Factory to create Thread information.
ThreadInformation	Interface used to print basic or extended thread information.
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.
Timer.Status
TimestampMessage	Messages that use this interface will cause the timestamp in the message to be used instead of the timestamp in the LogEvent.
TriConsumer<K,V,S>	An operation that accepts three input arguments and returns no result.
Unbox	Utility for preventing primitive parameter values from being auto-boxed.