/*
* Copyright 2002-2016 the original author or authors.
*
* Licensed 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.springframework.integration.router;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.mock;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Test;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.core.convert.ConversionService;
import org.springframework.integration.support.utils.IntegrationUtils;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
/**
* @author Gary Russell
* @since 3.0
*
*/
public class RouterConcurrencyTest {
@Test
public void test() throws Exception {
final AtomicInteger count = new AtomicInteger();
final Semaphore semaphore = new Semaphore(1);
final AbstractMessageRouter router = new AbstractMessageRouter() {
@Override
protected Collection<MessageChannel> determineTargetChannels(Message<?> message) {
return null;
}
@Override
protected void setConversionService(ConversionService conversionService) {
try {
if (count.incrementAndGet() > 1) {
Thread.sleep(2000);
}
super.setConversionService(conversionService);
semaphore.release();
Thread.sleep(1000);
}
catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
};
final AtomicInteger beanCounter = new AtomicInteger();
BeanFactory beanFactory = mock(BeanFactory.class);
doAnswer(invocation -> {
if (beanCounter.getAndIncrement() < 2) {
semaphore.tryAcquire(4, TimeUnit.SECONDS);
}
return false;
}).when(beanFactory).containsBean(IntegrationUtils.INTEGRATION_CONVERSION_SERVICE_BEAN_NAME);
router.setBeanFactory(beanFactory);
ExecutorService exec = Executors.newFixedThreadPool(2);
final List<ConversionService> returns = Collections.synchronizedList(
new ArrayList<ConversionService>());
Runnable runnable = () -> {
ConversionService requiredConversionService = router.getRequiredConversionService();
returns.add(requiredConversionService);
};
exec.execute(runnable);
exec.execute(runnable);
exec.shutdown();
exec.awaitTermination(10, TimeUnit.SECONDS);
assertEquals(2, returns.size());
assertNotNull(returns.get(0));
assertNotNull(returns.get(1));
}
}