001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.camel.processor.loadbalancer; 019 020 import org.apache.camel.Exchange; 021 import org.apache.camel.Processor; 022 import org.apache.camel.processor.Pipeline; 023 024 import java.util.List; 025 026 /** 027 * A {@link LoadBalancer} implementations which sends to all destinations (rather like JMS Topics) 028 * 029 * @version $Revision: 1.1 $ 030 */ 031 public class TopicLoadBalancer extends LoadBalancerSupport { 032 public void process(Exchange exchange) throws Exception { 033 List<Processor> list = getProcessors(); 034 for (Processor processor : list) { 035 Exchange copy = copyExchangeStrategy(processor, exchange); 036 processor.process(copy); 037 } 038 } 039 040 /** 041 * Strategy method to copy the exchange before sending to another endpoint. Derived classes such as the 042 * {@link Pipeline} will not clone the exchange 043 * 044 * @param processor the processor that will send the exchange 045 * @param exchange @return the current exchange if no copying is required such as for a pipeline otherwise a new copy of the exchange is returned. 046 */ 047 protected Exchange copyExchangeStrategy(Processor processor, Exchange exchange) { 048 return exchange.copy(); 049 } 050 }