Package org.apache.logging.log4j

Interface Marker

All Superinterfaces:

Serializable

All Known Implementing Classes:

MarkerManager.Log4jMarker

public interface Marker
extends Serializable

Markers are objects that are used to add easily filterable information to log messages. Markers can be hierarchical - each Marker may have a parent. This allows for broad categories being subdivided into more specific categories. An example might be a Marker named "Error" with children named "SystemError" and "ApplicationError".

Method Summary

Modifier and Type	Method	Description
Marker	addParents(Marker... markers)	Adds a Marker as a parent to this Marker.
boolean	equals(Object obj)	Returns true if the given marker has the same name as this marker.
String	getName()	Returns the name of this Marker.
Marker[]	getParents()	Returns a list of parents of this Marker.
int	hashCode()	Returns a hash code value based on the name of this marker.
boolean	hasParents()	Indicates whether this Marker has references to any other Markers.
boolean	isInstanceOf(String name)	Checks whether this Marker is an instance of the specified Marker.
boolean	isInstanceOf(Marker m)	Checks whether this Marker is an instance of the specified Marker.
boolean	remove(Marker marker)	Removes the specified Marker as a parent of this Marker.
Marker	setParents(Marker... markers)	Replaces the set of parent Markers with the provided Markers.

Method Detail

addParents

Marker addParents(Marker... markers)

Adds a Marker as a parent to this Marker.

Parameters:

markers - The parent markers to add.

Returns:

The current Marker object, thus allowing multiple adds to be concatenated.

Throws:

IllegalArgumentException - if the argument is null

equals

boolean equals(Object obj)

Returns true if the given marker has the same name as this marker.

Overrides:

equals in class Object

Parameters:

obj - the reference object with which to compare.

Returns:

true if the given marker has the same name as this marker.

Since:

2.4

getName

String getName()

Returns the name of this Marker.

Returns:

The name of the Marker.

getParents

Marker[] getParents()

Returns a list of parents of this Marker.

Returns:

The parent Markers or null if this Marker has no parents.

hashCode

int hashCode()

Returns a hash code value based on the name of this marker. Markers are equal if they have the same name.

Overrides:

hashCode in class Object

Returns:

the computed hash code

Since:

2.4

hasParents

boolean hasParents()

Indicates whether this Marker has references to any other Markers.

Returns:

true if the Marker has parent Markers

isInstanceOf

boolean isInstanceOf(Marker m)

Checks whether this Marker is an instance of the specified Marker.

Parameters:

m - The Marker to check.

Returns:

true if this Marker or one of its ancestors is the specified Marker, false otherwise.

Throws:

IllegalArgumentException - if the argument is null

isInstanceOf

boolean isInstanceOf(String name)

Checks whether this Marker is an instance of the specified Marker.

Parameters:

name - The name of the Marker.

Returns:

true if this Marker or one of its ancestors matches the specified name, false otherwise.

Throws:

IllegalArgumentException - if the argument is null

remove

boolean remove(Marker marker)

Removes the specified Marker as a parent of this Marker.

Parameters:

marker - The marker to remove.

Returns:

true if the marker was removed.

Throws:

IllegalArgumentException - if the argument is null

setParents

Marker setParents(Marker... markers)

Replaces the set of parent Markers with the provided Markers.

Parameters:

markers - The new set of parent Markers or null to clear the parents.

Returns:

The current Marker object.