001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. 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 package org.apache.camel.processor.loadbalancer; 018 019 import java.util.List; 020 021 import org.apache.camel.Exchange; 022 import org.apache.camel.Processor; 023 024 /** 025 * A {@link LoadBalancer} implementations which sends to all destinations 026 * (rather like JMS Topics) 027 * 028 * @version $Revision: 36635 $ 029 */ 030 public class TopicLoadBalancer extends LoadBalancerSupport { 031 public void process(Exchange exchange) throws Exception { 032 List<Processor> list = getProcessors(); 033 for (Processor processor : list) { 034 Exchange copy = copyExchangeStrategy(processor, exchange); 035 processor.process(copy); 036 } 037 } 038 039 /** 040 * Strategy method to copy the exchange before sending to another endpoint. 041 * Derived classes such as the {@link org.apache.camel.processor.Pipeline Pipeline} 042 * will not clone the exchange 043 * 044 * @param processor the processor that will send the exchange 045 * @param exchange the exchange 046 * @return the current exchange if no copying is required such as for a 047 * pipeline otherwise a new copy of the exchange is returned. 048 */ 049 protected Exchange copyExchangeStrategy(Processor processor, Exchange exchange) { 050 return exchange.copy(); 051 } 052 }