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 * Implements the round robin load balancing policy
026 *
027 * @version $Revision: 630568 $
028 */
029 public class RoundRobinLoadBalancer extends QueueLoadBalancer {
030 private int counter = -1;
031
032 protected synchronized Processor chooseProcessor(List<Processor> processors, Exchange exchange) {
033 int size = processors.size();
034 if (++counter >= size) {
035 counter = 0;
036 }
037 return processors.get(counter);
038 }
039 }