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 javax.xml.bind.annotation.XmlAccessType;
020import javax.xml.bind.annotation.XmlAccessorType;
021import javax.xml.bind.annotation.XmlAttribute;
022import javax.xml.bind.annotation.XmlRootElement;
023import javax.xml.bind.annotation.XmlTransient;
024
025import org.apache.camel.model.LoadBalancerDefinition;
026import org.apache.camel.processor.loadbalancer.LoadBalancer;
027import org.apache.camel.spi.Metadata;
028import org.apache.camel.spi.RouteContext;
029import org.apache.camel.util.CamelContextHelper;
030import org.apache.camel.util.ObjectHelper;
031
032/**
033 * Custom load balancer
034 */
035@Metadata(label = "eip,routing,loadbalance")
036@XmlRootElement(name = "customLoadBalancer")
037@XmlAccessorType(XmlAccessType.FIELD)
038public class CustomLoadBalancerDefinition extends LoadBalancerDefinition {
039
040    @XmlTransient
041    private LoadBalancer loadBalancer;
042    @XmlAttribute(required = true)
043    private String ref;
044
045    public CustomLoadBalancerDefinition() {
046    }
047
048    public String getRef() {
049        return ref;
050    }
051
052    /**
053     * Refers to the custom load balancer to lookup from the registry
054     */
055    public void setRef(String ref) {
056        this.ref = ref;
057    }
058
059    public LoadBalancer getLoadBalancer() {
060        return loadBalancer;
061    }
062
063    /**
064     * The custom load balancer to use.
065     */
066    public void setLoadBalancer(LoadBalancer loadBalancer) {
067        this.loadBalancer = loadBalancer;
068    }
069
070    @Override
071    protected LoadBalancer createLoadBalancer(RouteContext routeContext) {
072        if (loadBalancer != null) {
073            return loadBalancer;
074        }
075
076        ObjectHelper.notEmpty(ref, "ref", this);
077        return CamelContextHelper.mandatoryLookup(routeContext.getCamelContext(), ref, LoadBalancer.class);
078    }
079
080    @Override
081    public String toString() {
082        if (loadBalancer != null) {
083            return "CustomLoadBalancer[" + loadBalancer + "]";
084        } else {
085            return "CustomLoadBalancer[" + ref + "]";
086        }
087    }
088
089}