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package com.sun.enterprise.resource;

import java.util.*;

/**
 * This is a registry class that keep the recoveryresource listeners.
 * A lifecycle module will be able to use this singleton to register
 * its recoveryresourcelisteners.
 *
 * @author Binod PG
 * @since 9.1
 */
public class RecoveryResourceRegistry  {

    private static RecoveryResourceRegistry rrr = null;
    private Set listeners = null;
    
    private RecoveryResourceRegistry() {
        listeners = new HashSet();
    }

    public static RecoveryResourceRegistry getInstance() {
        if (rrr == null) {
            rrr = new RecoveryResourceRegistry();
        }
        return rrr;
    }

    public void addListener(RecoveryResourceListener rrl) {
        listeners.add(rrl);
    }

    public Set getListeners() {
        return listeners;
    }
    
}