/**
* 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.seda;
import java.util.Random;
import org.apache.camel.ContextTestSupport;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.PollingConsumer;
import org.apache.camel.component.mock.MockEndpoint;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
/**
* Unit test to verify that we can stop and start a seda consumer while a producer
* continues to send messages to it.
*/
public class SedaConsumerStartStopTest extends ContextTestSupport {
private PollingConsumer consumer;
public boolean isUseRouteBuilder() {
return false;
}
private void sendMessagesToQueue() throws Exception {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.afterPropertiesSet();
executor.execute(new Runnable() {
public void run() {
for (int i = 0; i < 20; i++) {
try {
// do some random sleep to simulate spread in user activity
Thread.sleep(new Random().nextInt(10));
} catch (InterruptedException e) {
// ignore
}
template.sendBody("seda:queue", i);
}
};
});
}
public void initRoute() throws Exception {
Endpoint endpoint = context.getEndpoint("seda:queue");
consumer = endpoint.createPollingConsumer();
}
public void testStartStopConsumer() throws Exception {
MockEndpoint mock = getMockEndpoint("mock:result");
mock.expectedMessageCount(20);
mock.expectsAscending(body());
initRoute();
// will send messages to the queue in another thread simulation a producer
sendMessagesToQueue();
consumer.start();
for (int i = 0; i < 20; i++) {
if (i == 10) {
// stop while sending, and then start again to pickup what is left in the queue
consumer.stop();
Thread.sleep(1000);
consumer.start();
}
// use 1000 as timeout otherwise we might get null if the consumer hasn't been started again
Exchange exchange = consumer.receive(1000);
template.send("mock:result", exchange);
}
assertMockEndpointsSatisfied();
}
}