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

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method and 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(Marker m)
      Checks whether this Marker is an instance of the specified Marker.
      boolean isInstanceOf(String name)
      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.

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