GroupedExchangeRoundtripTest.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.component.google.pubsub.integration;

import java.util.List;

import org.apache.camel.Endpoint;
import org.apache.camel.EndpointInject;
import org.apache.camel.Exchange;
import org.apache.camel.Produce;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.google.pubsub.PubsubTestSupport;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.impl.DefaultExchange;
import org.apache.camel.processor.aggregate.GroupedExchangeAggregationStrategy;
import org.junit.BeforeClass;
import org.junit.Test;

public class GroupedExchangeRoundtripTest extends PubsubTestSupport {

    private static final String TOPIC_NAME = "groupTopic";
    private static final String SUBSCRIPTION_NAME = "groupSubscription";

    @EndpointInject(uri = "direct:aggregator")
    private Endpoint aggregator;

    @EndpointInject(uri = "google-pubsub:{{project.id}}:" + TOPIC_NAME)
    private Endpoint topic;

    @EndpointInject(uri = "mock:sendResult")
    private MockEndpoint sendResult;

    @EndpointInject(uri = "google-pubsub:{{project.id}}:" + SUBSCRIPTION_NAME)
    private Endpoint pubsubSubscription;

    @EndpointInject(uri = "mock:receiveResult")
    private MockEndpoint receiveResult;

    @Produce(uri = "direct:aggregator")
    private ProducerTemplate producer;

    @BeforeClass
    public static void createTopicSubscription() throws Exception {
        createTopicSubscriptionPair(TOPIC_NAME, SUBSCRIPTION_NAME);
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            public void configure() {

                from(aggregator)
                        .routeId("Group_Send")
                        .aggregate(new GroupedExchangeAggregationStrategy())
                        .constant(true)
                        .completionSize(2)
                        .completionTimeout(5000L)
                        .to(topic)
                        .to(sendResult);

                from(pubsubSubscription)
                        .routeId("Group_Receive")
                        .to(receiveResult);

            }
        };
    }

    /**
     * Tests that a grouped exhcange is successfully received
     *
     * @throws Exception
     */

    @Test
    public void sendGrouped() throws Exception {

        Exchange exchange1 = new DefaultExchange(context);
        Exchange exchange2 = new DefaultExchange(context);

        String body1 = "Group 1.1 : " + exchange1.getExchangeId();
        String body2 = "Group 1.2 : " + exchange2.getExchangeId();

        receiveResult.expectedMessageCount(2);
        receiveResult.expectedBodiesReceivedInAnyOrder(body1, body2);

        exchange1.getIn().setBody(body1);
        exchange2.getIn().setBody(body2);

        producer.send(exchange1);
        producer.send(exchange2);

        receiveResult.assertIsSatisfied(3000);

        // Send result section
        List<Exchange> results = sendResult.getExchanges();
        assertEquals("Received exchanges", 1, results.size());

        List exchangeGrouped = (List) results
                .get(0)
                .getProperty(Exchange.GROUPED_EXCHANGE);
        assertEquals("Received messages within the exchange", 2, exchangeGrouped.size());
    }
}