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 import javax.xml.bind.annotation.XmlAccessType; 022 import javax.xml.bind.annotation.XmlAccessorType; 023 import javax.xml.bind.annotation.XmlAttribute; 024 import javax.xml.bind.annotation.XmlElement; 025 import javax.xml.bind.annotation.XmlRootElement; 026 027 import org.apache.camel.model.LoadBalancerDefinition; 028 import org.apache.camel.processor.loadbalancer.FailOverLoadBalancer; 029 import org.apache.camel.processor.loadbalancer.LoadBalancer; 030 import org.apache.camel.spi.RouteContext; 031 032 /** 033 * Represents an XML <failover/> element 034 */ 035 @XmlRootElement(name = "failover") 036 @XmlAccessorType(XmlAccessType.FIELD) 037 public class FailoverLoadBalancerDefinition extends LoadBalancerDefinition { 038 @XmlElement(name = "exception") 039 private List<String> exceptions = new ArrayList<String>(); 040 @XmlAttribute 041 private Boolean roundRobin; 042 @XmlAttribute 043 private Integer maximumFailoverAttempts; 044 045 public FailoverLoadBalancerDefinition() { 046 } 047 048 @Override 049 protected LoadBalancer createLoadBalancer(RouteContext routeContext) { 050 FailOverLoadBalancer answer; 051 052 if (!exceptions.isEmpty()) { 053 List<Class<?>> classes = new ArrayList<Class<?>>(); 054 for (String name : exceptions) { 055 Class<?> type = routeContext.getCamelContext().getClassResolver().resolveClass(name); 056 if (type == null) { 057 throw new IllegalArgumentException("Cannot find class: " + name + " in the classpath"); 058 } 059 classes.add(type); 060 } 061 answer = new FailOverLoadBalancer(classes); 062 } else { 063 answer = new FailOverLoadBalancer(); 064 } 065 066 if (getMaximumFailoverAttempts() != null) { 067 answer.setMaximumFailoverAttempts(getMaximumFailoverAttempts()); 068 } 069 if (roundRobin != null) { 070 answer.setRoundRobin(roundRobin); 071 } 072 073 return answer; 074 } 075 076 public List<String> getExceptions() { 077 return exceptions; 078 } 079 080 public void setExceptions(List<String> exceptions) { 081 this.exceptions = exceptions; 082 } 083 084 public boolean isRoundRobin() { 085 return roundRobin != null && roundRobin; 086 } 087 088 public Boolean getRoundRobin() { 089 return roundRobin; 090 } 091 092 public void setRoundRobin(Boolean roundRobin) { 093 this.roundRobin = roundRobin; 094 } 095 096 public Integer getMaximumFailoverAttempts() { 097 return maximumFailoverAttempts; 098 } 099 100 public void setMaximumFailoverAttempts(Integer maximumFailoverAttempts) { 101 this.maximumFailoverAttempts = maximumFailoverAttempts; 102 } 103 104 @Override 105 public String toString() { 106 return "FailoverLoadBalancer"; 107 } 108 }