Package org.apache.logging.log4j.core.util

Log4j 2 helper classes.

Interface Summary

Interface	Description
Builder<T>	A type of builder that can be used to configure and create a instances using a Java DSL instead of through a configuration file.
Cancellable	Interface to cancel a Runnable callback.
Clock	Provides the time stamp used in log events.
FileWatcher	Watches for changes in a File and performs an action when the file is modified.
NanoClock	Provides the high-resolution time stamp used in log events.
SecretKeyProvider	Factory class to provide a SecretKey instance.
ShutdownCallbackRegistry	Registry used for Runnable shutdown callback instances.

Class Summary

Class	Description
ArrayUtils	Copied from Apache Commons Lang (including the @since tags.)
Assert	Utility class providing common validation logic.
Booleans	Boolean helpers.
CachedClock	Implementation of the Clock interface that tracks the time in a private long field that is updated by a background thread once every millisecond.
ClockFactory	Factory for Clock objects.
Closer	Closes resources.
CloseShieldOutputStream	A delegating OutputStream that does not close its delegate.
CloseShieldWriter
CoarseCachedClock	This Clock implementation is similar to CachedClock.
Constants	Log4j Constants.
CronExpression	Provides a parser and evaluator for unix-like cron expressions.
CyclicBuffer<T>	A bounded buffer containing elements of type T.
DefaultShutdownCallbackRegistry	ShutdownRegistrationStrategy that simply uses Runtime.addShutdownHook(Thread).
DummyNanoClock	Implementation of the NanoClock interface that always returns a fixed value.
ExecutorServices
FileUtils	File utilities.
Integers	Helps deal with integers.
IOUtils	Copied from Apache Commons IO revision 1686747.
JndiCloser	Helper class for closing JNDI resources.
JsonUtils	This class is borrowed from Jackson.
KeyValuePair	Key/Value pair configuration item.
KeyValuePair.Builder
Loader	Load resources (or images) from various sources.
Log4jThread	Prefixes thread names with "Log4j2-".
Log4jThreadFactory	Creates Log4jThreads.
NameUtil
NetUtils	Networking-related convenience methods.
NullOutputStream	Writes all data to the famous /dev/null.
ObjectArrayIterator<E>	An Iterator over an array of objects.
OptionConverter	A convenience class to convert property values to specific types.
Patterns	Pattern strings used throughout Log4j.
ReflectionUtil	Utility class for performing common reflective operations.
SetUtils	Set-related convenience methods.
StringBuilderWriter	Writer implementation that outputs to a StringBuilder.
StringEncoder	Encodes Strings to bytes.
SystemClock	Implementation of the Clock interface that returns the system time.
SystemMillisClock	Implementation of the Clock interface that returns the system time in millisecond granularity.
SystemNanoClock	Implementation of the NanoClock interface that returns the system nano time.
Throwables	Helps with Throwable objects.
Transform	Utility class for transforming strings.
TypeUtil	Utility class for working with Java Types and derivatives.
UuidUtil	Generates a unique ID.
WatchManager	Manages FileWatchers.

Enum Summary

Enum	Description
ExtensionLanguageMapping