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;
021import javax.xml.bind.annotation.XmlAccessType;
022import javax.xml.bind.annotation.XmlAccessorType;
023import javax.xml.bind.annotation.XmlAttribute;
024import javax.xml.bind.annotation.XmlElement;
025import javax.xml.bind.annotation.XmlRootElement;
026
027import org.apache.camel.model.LoadBalancerDefinition;
028import org.apache.camel.processor.loadbalancer.FailOverLoadBalancer;
029import org.apache.camel.processor.loadbalancer.LoadBalancer;
030import org.apache.camel.spi.RouteContext;
031
032/**
033 * Represents an XML <failover/> element
034 */
035@XmlRootElement(name = "failover")
036@XmlAccessorType(XmlAccessType.FIELD)
037public 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}