Package com.tangosol.util

Class Listeners

  • All Implemented Interfaces:
    Serializable
    public class Listeners
extends Base
implements Serializable
    Provide a simple, efficient, and thread-safe implementation of a list of event listeners. The implementation is optimized based on the assumption that listeners are added and removed relatively rarely, and that the list of listeners is requested relatively often. Thread safety is implemented by synchronizing on all methods that modify any data member of the class. Read-only methods are not synchronized.
    Version:
    1.00, 11/16/97
    Author:
    Cameron Purdy
    See Also:
    Serialized Form

    • Constructor Detail

      • Listeners

        public Listeners()
        Default constructor.

    • Method Detail

      • add

        public void add​(EventListener listener)
        Add a listener.
        Parameters:
        listener - the EventListener to add

      • remove

        public void remove​(EventListener listener)
        Remove a listener.
        Parameters:
        listener - the EventListener to remove

      • addAll

        public void addAll​(Listeners listeners)
        Add all listeners from another Listeners object.
        Parameters:
        listeners - the Listeners to add

      • removeAll

        public void removeAll()
        Remove all listeners.

      • isEmpty

        public boolean isEmpty()
        Check if there are no listeners.
        Returns:
        true if there are no listeners

      • getListenerCount

        public int getListenerCount()
        Returns the number of listeners.
        Returns:
        the number of listeners

      • contains

        public boolean contains​(EventListener listener)
        Check if a listener is in the list of listeners.
        Parameters:
        listener - the EventListener to search for
        Returns:
        true if the listener is in the list of listeners

      • listeners

        public EventListener[] listeners()
        Get the array of event listeners. It is illegal to modify the return value from this method.
        Returns:
        the array of event listeners

      • getListenerClassNames

        public String getListenerClassNames()
        Return a comma separated list of the listener class names.
        Returns:
        a comma separated list of the listener class names

      • getAsynchronousListeners

        public EventListener[] getAsynchronousListeners()
        Get the array of asynchronous event listeners. It is illegal to modify the return value from this method.
        Returns:
        the array of asynchronous event listeners

      • getSynchronousListeners

        public EventListener[] getSynchronousListeners()
        Get the array of synchronous event listeners. It is illegal to modify the return value from this method.
        Returns:
        the array of synchronous event listeners

      • setFilters

        public void setFilters​(Filter[] aFilter)
        Set the array of filters associated with this Listeners object.
        Parameters:
        aFilter - the array of associated filters

      • getFilters

        public Filter[] getFilters()
        Return the array of filters associated with this Listeners object.
        Returns:
        the array of filters associated with this Listeners object

      • toString

        public String toString()
        Return a string representation of the Listeners object.
        Overrides:
        toString in class Object
        Returns:
        a string representation of the Listeners object