| /** |
| * 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.processor.aggregator; |
| |
| import org.apache.camel.ContextTestSupport; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.builder.RouteBuilder; |
| import org.apache.camel.component.mock.MockEndpoint; |
| import org.apache.camel.processor.aggregate.AggregationStrategy; |
| |
| /** |
| * Unit test for using our own aggregation strategy. |
| */ |
| public class CustomAggregationStrategyTest extends ContextTestSupport { |
| |
| public void testCustomAggregationStrategy() throws Exception { |
| // START SNIPPET: e2 |
| MockEndpoint result = getMockEndpoint("mock:result"); |
| |
| // we expect to find the two winners with the highest bid |
| result.expectedBodiesReceivedInAnyOrder("200", "150"); |
| |
| // then we sent all the message at once |
| template.sendBodyAndHeader("direct:start", "100", "id", "1"); |
| template.sendBodyAndHeader("direct:start", "150", "id", "2"); |
| template.sendBodyAndHeader("direct:start", "130", "id", "2"); |
| template.sendBodyAndHeader("direct:start", "200", "id", "1"); |
| template.sendBodyAndHeader("direct:start", "190", "id", "1"); |
| |
| assertMockEndpointsSatisfied(); |
| // END SNIPPET: e2 |
| } |
| |
| @Override |
| protected RouteBuilder createRouteBuilder() throws Exception { |
| return new RouteBuilder() { |
| public void configure() throws Exception { |
| // START SNIPPET: e1 |
| // our route is aggregating from the direct queue and sending the response to the mock |
| from("direct:start") |
| // aggregated by header id and use our own strategy how to aggregate |
| .aggregate(new MyAggregationStrategy()).header("id") |
| // wait for 1 seconds to aggregate |
| .completionTimeout(1000L) |
| .to("mock:result"); |
| // END SNIPPET: e1 |
| } |
| }; |
| } |
| |
| // START SNIPPET: e3 |
| private static class MyAggregationStrategy implements AggregationStrategy { |
| |
| public Exchange aggregate(Exchange oldExchange, Exchange newExchange) { |
| if (oldExchange == null) { |
| // the first time we only have the new exchange so it wins the first round |
| return newExchange; |
| } |
| int oldPrice = oldExchange.getIn().getBody(Integer.class); |
| int newPrice = newExchange.getIn().getBody(Integer.class); |
| // return the "winner" that has the highest price |
| return newPrice > oldPrice ? newExchange : oldExchange; |
| } |
| } |
| // END SNIPPET: e3 |
| } |