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 }