| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.example; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.processor.aggregate.AggregationStrategy; |
| |
| /** |
| * Aggregate two numbers |
| * |
| * @version |
| */ |
| // START SNIPPET: e1 |
| public class NumberAggregationStrategy implements AggregationStrategy { |
| |
| public Exchange aggregate(Exchange oldExchange, Exchange newExchange) { |
| if (oldExchange == null) { |
| return newExchange; |
| } |
| |
| // check for stop command |
| String input = newExchange.getIn().getBody(String.class); |
| if ("STOP".equalsIgnoreCase(input)) { |
| return oldExchange; |
| } |
| |
| Integer num1 = oldExchange.getIn().getBody(Integer.class); |
| Integer num2 = newExchange.getIn().getBody(Integer.class); |
| |
| // just avoid bad inputs by assuming its a 0 value |
| Integer num3 = (num1 != null ? num1 : 0) + (num2 != null ? num2 : 0); |
| oldExchange.getIn().setBody(num3); |
| |
| return oldExchange; |
| } |
| |
| } |
| // END SNIPPET: e1 |