001/* 002 * Copyright 2002-2012 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.jms.connection; 018 019import java.util.ArrayList; 020import java.util.List; 021import javax.jms.ExceptionListener; 022import javax.jms.JMSException; 023 024import org.springframework.util.Assert; 025 026/** 027 * Implementation of the JMS ExceptionListener interface that supports chaining, 028 * allowing the addition of multiple ExceptionListener instances in order. 029 * 030 * @author Juergen Hoeller 031 * @since 2.0 032 */ 033public class ChainedExceptionListener implements ExceptionListener { 034 035 /** List of ExceptionListeners */ 036 private final List<ExceptionListener> delegates = new ArrayList<ExceptionListener>(2); 037 038 039 /** 040 * Add an ExceptionListener to the chained delegate list. 041 */ 042 public final void addDelegate(ExceptionListener listener) { 043 Assert.notNull(listener, "ExceptionListener must not be null"); 044 this.delegates.add(listener); 045 } 046 047 /** 048 * Return all registered ExceptionListener delegates (as array). 049 */ 050 public final ExceptionListener[] getDelegates() { 051 return this.delegates.toArray(new ExceptionListener[this.delegates.size()]); 052 } 053 054 055 @Override 056 public void onException(JMSException ex) { 057 for (ExceptionListener listener : this.delegates) { 058 listener.onException(ex); 059 } 060 } 061 062}