org.apache.logging.log4j.spi (log4j-api 3.0.0-alpha1)

Internal interfaces and classes to be used by authors of logging implementations or for internal use by API classes.

Interface Summary
Interface	Description
CleanableThreadContextMap	Deprecated. use `ThreadContextMap` directly
CopyOnWrite	Marker interface indicating that the implementing class is a copy-on-write data structure.
ExtendedLogger	Extends the `Logger` interface with methods that facilitate implementing or extending `Logger`s.
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.
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.
LoggerRegistry.MapFactory<T extends ExtendedLogger>	Interface to control the data structure used by the registry to store the Loggers.
ObjectThreadContextMap	Deprecated. use `ThreadContextMap` directly
ReadOnlyThreadContextMap	Read-only view of the data structure that implements MDC behavior for `ThreadContext`.
Terminable	Interface to be implemented by LoggerContext's that provide a shutdown method.
ThreadContextMap	Service provider interface to implement custom MDC behavior for `ThreadContext`.
ThreadContextMap2	Deprecated. use `ThreadContextMap` directly
ThreadContextStack	Service provider interface to implement custom NDC behavior for `ThreadContext`.

Class Summary
Class	Description
AbstractLogger	Base implementation of a Logger.
AbstractLoggerAdapter<L>	Provides an abstract base class to use for implementing LoggerAdapter.
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.
ExtendedLoggerWrapper	Wrapper class that exposes the protected AbstractLogger methods to support wrapped loggers.
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.WeakMapFactory<T extends ExtendedLogger>	Generates WeakHashMaps for use by the registry to store the Loggers.
LoggingSystem	Handles initializing the Log4j API through `Provider` discovery.
LoggingSystemProperty.Constant
MutableThreadContextStack	TODO
NoOpThreadContextMap	`ThreadContextMap` implementation used when either of system properties or is `true`.
PropertyComponent.Constant	These constants are only for use in LoggingSystemProperty to create constants for @SetSystemProperty.
Provider	Model class for a Log4j 2 provider.

Enum Summary
Enum	Description
LoggingSystemProperty	Centralized list of property name constants that can be configured in the Log4j API.
PropertyComponent	Components that own properties.
StandardLevel	Standard Logging Levels as an enumeration for use internally.