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.processor.loadbalancer;
018    
019    import java.util.List;
020    import java.util.concurrent.CopyOnWriteArrayList;
021    
022    import org.apache.camel.Processor;
023    import org.apache.camel.impl.ServiceSupport;
024    import org.apache.camel.util.ServiceHelper;
025    
026    /**
027     * A default base class for a {@link LoadBalancer} implementation
028     *
029     * @version $Revision: 35332 $
030     */
031    public abstract class LoadBalancerSupport extends ServiceSupport implements LoadBalancer {
032        private List<Processor> processors = new CopyOnWriteArrayList<Processor>();
033    
034        public void addProcessor(Processor processor) {
035            processors.add(processor);
036        }
037    
038        public void removeProcessor(Processor processor) {
039            processors.remove(processor);
040        }
041    
042        public List<Processor> getProcessors() {
043            return processors;
044        }
045        
046        protected void doStart() throws Exception {
047            ServiceHelper.startServices(processors);        
048        }
049    
050        protected void doStop() throws Exception {
051            ServiceHelper.stopServices(processors);       
052        }
053    }