001    /** 
002     * 
003     * Copyright 2005 Hiram Chirino
004     * 
005     * Licensed under the Apache License, Version 2.0 (the "License"); 
006     * you may not use this file except in compliance with the License. 
007     * You may obtain a copy of the License at 
008     * 
009     * http://www.apache.org/licenses/LICENSE-2.0
010     * 
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS, 
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
014     * See the License for the specific language governing permissions and 
015     * limitations under the License. 
016     * 
017     **/
018    package org.activemq.advisories;
019    
020    public interface ProducerDemandListener {
021        
022        /**
023         * Called when a there is a chanage in demand for a destination. 
024         * @param event
025         */
026        public void onEvent(ProducerDemandEvent event);
027        
028    }