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.aggregate;
018    
019    import org.apache.camel.Exchange;
020    
021    /**
022     * An {@link AggregationStrategy} which just uses the latest exchange which is useful
023     * for status messages where old status messages have no real value; another example is things
024     * like market data prices, where old stock prices are not that relevant, only the current price is.
025     *
026     * @version $Revision: 35332 $
027     */
028    public class UseLatestAggregationStrategy implements AggregationStrategy {
029    
030        public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
031            return newExchange;
032        }
033    }