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.model.loadbalancer;
018
019 import java.util.ArrayList;
020 import java.util.List;
021
022 import javax.xml.bind.annotation.XmlAccessType;
023 import javax.xml.bind.annotation.XmlAccessorType;
024 import javax.xml.bind.annotation.XmlAttribute;
025 import javax.xml.bind.annotation.XmlRootElement;
026
027 import org.apache.camel.model.LoadBalancerDefinition;
028 import org.apache.camel.processor.loadbalancer.LoadBalancer;
029 import org.apache.camel.processor.loadbalancer.WeightedLoadBalancer;
030 import org.apache.camel.processor.loadbalancer.WeightedRandomLoadBalancer;
031 import org.apache.camel.processor.loadbalancer.WeightedRoundRobinLoadBalancer;
032 import org.apache.camel.spi.RouteContext;
033 import org.apache.camel.util.ObjectHelper;
034
035 /**
036 * Represents an XML <weighted/> element
037 */
038 @XmlRootElement(name = "weighted")
039 @XmlAccessorType(XmlAccessType.FIELD)
040 public 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 }