1 /* 2 * Copyright 1999-2004 The Apache Software Foundation 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 12 * implied. 13 * 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.excalibur.event.impl; 18 19 import org.apache.excalibur.event.DequeueInterceptor; 20 import org.apache.excalibur.event.Source; 21 22 /** 23 * The dequeue executable interface describes operations that 24 * are executed before and after elements are pulled from a 25 * queue. 26 * 27 * @author <a HREF="mailto:dev@avalon.apache.org">Avalon Development Team</a> 28 * @version $Revision: 1.4 $ 29 */ 30 public final class NullDequeueInterceptor implements DequeueInterceptor 31 { 32 33 /** 34 * An operation executed before dequeing events from 35 * the queue. The size of the queue is passed in so the 36 * implementation can determine to execute based on the 37 * size of the queue. 38 * @since Feb 10, 2003 39 * 40 * @param context 41 * The source from which the dequeue is performed. 42 */ 43 public void before(Source context) {} 44 45 /** 46 * An operation executed after dequeing events from 47 * the queue. The size of the queue is passed in so the 48 * implementation can determine to execute based on the 49 * size of the queue. 50 * @since Feb 10, 2003 51 * 52 * @param context 53 * The source from which the dequeue is performed. 54 */ 55 public void after(Source context) {} 56 57 } 58