camel-core/src/test/java/org/apache/camel/processor/RecipientListExchangePropertyAggregationStrategyTest.java

/**
 * 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;

import java.util.ArrayList;
import java.util.List;

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;

/**
 * @version 
 */
public class RecipientListExchangePropertyAggregationStrategyTest extends ContextTestSupport {

    private final MyAggregationStrategy strategy = new MyAggregationStrategy();

    public void testRecipientExchangeProperty() throws Exception {
        getMockEndpoint("mock:a").expectedPropertyReceived(Exchange.RECIPIENT_LIST_ENDPOINT, "direct://a");
        getMockEndpoint("mock:a").expectedPropertyReceived(Exchange.TO_ENDPOINT, "mock://a");
        getMockEndpoint("mock:b").expectedPropertyReceived(Exchange.RECIPIENT_LIST_ENDPOINT, "direct://b");
        getMockEndpoint("mock:b").expectedPropertyReceived(Exchange.TO_ENDPOINT, "mock://b");
        getMockEndpoint("mock:c").expectedPropertyReceived(Exchange.RECIPIENT_LIST_ENDPOINT, "direct://c");
        getMockEndpoint("mock:c").expectedPropertyReceived(Exchange.TO_ENDPOINT, "mock://c");

        MockEndpoint mock = getMockEndpoint("mock:result");
        mock.expectedBodiesReceived("Hello c");
        // would be the last one
        mock.expectedPropertyReceived(Exchange.RECIPIENT_LIST_ENDPOINT, "direct://c");

        String out = template.requestBodyAndHeader("direct:start", "Hello World", "slip", "direct:a,direct:b,direct:c", String.class);
        assertEquals("Hello c", out);

        assertMockEndpointsSatisfied();

        assertEquals(3, strategy.getUris().size());
        assertEquals("direct://a", strategy.getUris().get(0));
        assertEquals("direct://b", strategy.getUris().get(1));
        assertEquals("direct://c", strategy.getUris().get(2));
    }

    protected RouteBuilder createRouteBuilder() {
        return new RouteBuilder() {
            public void configure() {
                from("direct:start")
                    .recipientList(header("slip")).aggregationStrategy(strategy)
                        .to("mock:result");

                from("direct:a").to("mock:a").transform(constant("Hello a"));
                from("direct:b").to("mock:b").transform(constant("Hello b"));
                from("direct:c").to("mock:c").transform(constant("Hello c"));
            }
        };
    }

    private static class MyAggregationStrategy implements AggregationStrategy {

        private List<String> uris = new ArrayList<String>();

        @Override
        public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
            uris.add(newExchange.getProperty(Exchange.RECIPIENT_LIST_ENDPOINT, String.class));
            return newExchange;
        }

        public List<String> getUris() {
            return uris;
        }
    }

}