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.component.seda;
018    
019    import java.util.List;
020    
021    import org.apache.camel.Endpoint;
022    import org.apache.camel.Exchange;
023    import org.apache.camel.impl.PollingConsumerSupport;
024    
025    /**
026     * @version $Revision: 36321 $
027     */
028    public class ListPollingConsumer extends PollingConsumerSupport {
029        private final List<Exchange> exchanges;
030    
031        public ListPollingConsumer(Endpoint endpoint, List<Exchange> exchanges) {
032            super(endpoint);
033            this.exchanges = exchanges;
034        }
035    
036        public Exchange receive() {
037            return receiveNoWait();
038        }
039    
040        public Exchange receiveNoWait() {
041            if (exchanges.isEmpty()) {
042                return null;
043            } else {
044                return exchanges.remove(0);
045            }
046        }
047    
048        public Exchange receive(long timeout) {
049            return receiveNoWait();
050        }
051    
052        protected void doStart() throws Exception {
053        }
054    
055        protected void doStop() throws Exception {
056        }
057    }