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 */ 017package org.apache.camel.processor.loadbalancer; 018 019import java.util.List; 020 021import org.apache.camel.Exchange; 022import org.apache.camel.Processor; 023 024public class WeightedRoundRobinLoadBalancer extends WeightedLoadBalancer { 025 private int counter; 026 027 public WeightedRoundRobinLoadBalancer(List<Integer> distributionRatios) { 028 super(distributionRatios); 029 } 030 031 @Override 032 protected synchronized Processor chooseProcessor(List<Processor> processors, Exchange exchange) { 033 if (isRuntimeRatiosZeroed()) { 034 resetRuntimeRatios(); 035 counter = 0; 036 } 037 038 boolean found = false; 039 while (!found) { 040 if (counter >= getRuntimeRatios().size()) { 041 counter = 0; 042 } 043 044 if (getRuntimeRatios().get(counter).getRuntimeWeight() > 0) { 045 getRuntimeRatios().get(counter).setRuntimeWeight((getRuntimeRatios().get(counter).getRuntimeWeight()) - 1); 046 found = true; 047 } else { 048 counter++; 049 } 050 } 051 052 lastIndex = counter; 053 054 return processors.get(counter++); 055 } 056 057}