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.model.loadbalancer; 018 019import java.util.ArrayList; 020import java.util.List; 021 022import javax.xml.bind.annotation.XmlAccessType; 023import javax.xml.bind.annotation.XmlAccessorType; 024import javax.xml.bind.annotation.XmlAttribute; 025import javax.xml.bind.annotation.XmlRootElement; 026 027import org.apache.camel.model.LoadBalancerDefinition; 028import org.apache.camel.processor.loadbalancer.LoadBalancer; 029import org.apache.camel.processor.loadbalancer.WeightedLoadBalancer; 030import org.apache.camel.processor.loadbalancer.WeightedRandomLoadBalancer; 031import org.apache.camel.processor.loadbalancer.WeightedRoundRobinLoadBalancer; 032import org.apache.camel.spi.RouteContext; 033import org.apache.camel.util.ObjectHelper; 034 035/** 036 * Represents an XML <weighted/> element 037 */ 038@XmlRootElement(name = "weighted") 039@XmlAccessorType(XmlAccessType.FIELD) 040public class WeightedLoadBalancerDefinition extends LoadBalancerDefinition { 041 @XmlAttribute 042 private Boolean roundRobin; 043 @XmlAttribute(required = true) 044 private String distributionRatio; 045 @XmlAttribute 046 private String distributionRatioDelimiter; 047 048 public WeightedLoadBalancerDefinition() { 049 } 050 051 @Override 052 protected LoadBalancer createLoadBalancer(RouteContext routeContext) { 053 WeightedLoadBalancer loadBalancer; 054 List<Integer> distributionRatioList = new ArrayList<Integer>(); 055 056 try { 057 if (distributionRatioDelimiter == null) { 058 distributionRatioDelimiter = ","; 059 } 060 061 String[] ratios = distributionRatio.split(distributionRatioDelimiter); 062 for (String ratio : ratios) { 063 distributionRatioList.add(new Integer(ratio.trim())); 064 } 065 066 if (!isRoundRobin()) { 067 loadBalancer = new WeightedRandomLoadBalancer(distributionRatioList); 068 } else { 069 loadBalancer = new WeightedRoundRobinLoadBalancer(distributionRatioList); 070 } 071 } catch (Exception e) { 072 throw ObjectHelper.wrapRuntimeCamelException(e); 073 } 074 075 return loadBalancer; 076 } 077 078 public Boolean getRoundRobin() { 079 return roundRobin; 080 } 081 082 public void setRoundRobin(Boolean roundRobin) { 083 this.roundRobin = roundRobin; 084 } 085 086 public boolean isRoundRobin() { 087 return roundRobin != null && roundRobin; 088 } 089 090 public String getDistributionRatio() { 091 return distributionRatio; 092 } 093 094 public void setDistributionRatio(String distributionRatio) { 095 this.distributionRatio = distributionRatio; 096 } 097 098 public String getDistributionRatioDelimiter() { 099 return distributionRatioDelimiter; 100 } 101 102 public void setDistributionRatioDelimiter(String distributionRatioDelimiter) { 103 this.distributionRatioDelimiter = distributionRatioDelimiter; 104 } 105 106 @Override 107 public String toString() { 108 if (!isRoundRobin()) { 109 return "WeightedRandomLoadBalancer[" + distributionRatio + "]"; 110 } else { 111 return "WeightedRoundRobinLoadBalancer[" + distributionRatio + "]"; 112 } 113 } 114}