Demonstration of Synchronous Transactions with Spring-AMQP

Config.java

/*
 * Copyright 2013 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 foo;

import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.transaction.RabbitTransactionManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * @author Gary Russell
 *
 */
@Configuration
@EnableTransactionManagement
public class Config {

	@Bean
	public RabbitTemplate rabbitTemplate() {
	    RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory());
	    rabbitTemplate.setRoutingKey("txTestQ2");
	    rabbitTemplate.setQueue("txTestQ1");
	    rabbitTemplate.setMandatory(true);
	    rabbitTemplate.setChannelTransacted(true);
	    return rabbitTemplate;
	}

	@Bean
	public ConnectionFactory connectionFactory() {
		return new CachingConnectionFactory();
	}

	@Bean
	public RabbitTransactionManager transactionManager() {
		return new RabbitTransactionManager(connectionFactory());
	}

	@Bean
	public Service service() {
//		return new ServiceImpl1();
		return new ServiceImpl2();
	}
}

Service.java

/*
 * Copyright 2013 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 foo;


/**
 * @author Gary Russell
 *
 */
public interface Service {

	void process(boolean crash) throws Exception;

}

ServiceImpl1.java

/*
 * Copyright 2013 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 foo;

import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author Gary Russell
 *
 */
public class ServiceImpl1 implements Service {

	@Autowired
	private RabbitTemplate template;

	@Transactional
	public void process(boolean crash) {
		Object o = template.receiveAndConvert();
		if (crash) {
			throw new RuntimeException("crash");
		}
		if (o != null) {
			System.out.println(o);
			template.convertAndSend(o);
		}
	}

}

ServiceImpl2.java

/*
 * Copyright 2013 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 foo;

import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author Gary Russell
 *
 */
public class ServiceImpl2 implements Service {

	@Autowired
	private RabbitTemplate template;

	@Override
	@Transactional(rollbackFor=Exception.class)
	public void process(boolean crash) throws Exception {
		Object o = template.receiveAndConvert();
		if (crash) {
			throw new FooEx("crash");
		}
		if (o != null) {
			System.out.println(o);
			template.convertAndSend(o);
		}
	}

	@SuppressWarnings("serial")
	private class FooEx extends Exception {

		private FooEx(String message) {
			super(message);
		}

	}
}

TxTest.java

/*
 * Copyright 2013 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 foo;

import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;

import org.junit.Test;

import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;

/**
 * @author Gary Russell
 *
 */
public class TxTest {

	@Test
	public void test() {
		final AbstractApplicationContext context =
				new AnnotationConfigApplicationContext(Config.class);

		RabbitTemplate template = context.getBean(RabbitTemplate.class);
		template.convertAndSend("", "txTestQ1", "foo");
		Service service = context.getBean(Service.class);
		service.process(false);
		Object o = template.receiveAndConvert("txTestQ1");
		assertNull(o);
		o = template.receiveAndConvert("txTestQ2");
		assertNotNull(o);
		System.out.println("message " + o + " moved from Q1 to Q2");

		template.convertAndSend("", "txTestQ1", "bar");
		try {
			service.process(true);
		}
		catch (Exception e) {
			System.out.println(e.getMessage());
		}
		o = template.receiveAndConvert("txTestQ1");
		assertNotNull(o);
		System.out.println("message " + o + " still in Q1");
		o = template.receiveAndConvert("txTestQ2");
		assertNull(o);
	}
}

zLog.txt

09:55:17.979 DEBUG [main][org.springframework.amqp.rabbit.transaction.RabbitTransactionManager] Creating new transaction with name [foo.Service.process]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
09:55:17.979 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Found cached Rabbit Channel
09:55:17.979 DEBUG [main][org.springframework.amqp.rabbit.transaction.RabbitTransactionManager] Created AMQP transaction on channel [Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)]
09:55:17.980 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Bound value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@fa7f9dc] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] to thread [main]
09:55:17.980 TRACE [main][org.springframework.transaction.interceptor.TransactionInterceptor] Getting transaction for [foo.Service.process]
09:55:17.994 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Retrieved value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@fa7f9dc] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] bound to thread [main]
09:55:17.994 DEBUG [main][org.springframework.amqp.rabbit.core.RabbitTemplate] Executing callback on RabbitMQ Channel: Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:17.997 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Retrieved value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@fa7f9dc] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] bound to thread [main]
09:55:17.997 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Retrieved value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@fa7f9dc] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] bound to thread [main]
foo
09:55:17.998 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Retrieved value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@fa7f9dc] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] bound to thread [main]
09:55:17.998 DEBUG [main][org.springframework.amqp.rabbit.core.RabbitTemplate] Executing callback on RabbitMQ Channel: Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:17.998 DEBUG [main][org.springframework.amqp.rabbit.core.RabbitTemplate] Publishing message on exchange [], routingKey = [txTestQ2]
09:55:17.999 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Retrieved value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@fa7f9dc] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] bound to thread [main]
09:55:17.999 TRACE [main][org.springframework.transaction.interceptor.TransactionInterceptor] Completing transaction for [foo.Service.process]
09:55:17.999 DEBUG [main][org.springframework.amqp.rabbit.transaction.RabbitTransactionManager] Initiating transaction commit
09:55:18.123 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Removed value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@fa7f9dc] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] from thread [main]
09:55:18.123 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Returning cached Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:18.123 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Found cached Rabbit Channel
09:55:18.124 DEBUG [main][org.springframework.amqp.rabbit.core.RabbitTemplate] Executing callback on RabbitMQ Channel: Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:18.124 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Returning cached Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:18.125 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Found cached Rabbit Channel
09:55:18.125 DEBUG [main][org.springframework.amqp.rabbit.core.RabbitTemplate] Executing callback on RabbitMQ Channel: Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:18.126 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Returning cached Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
message foo moved from Q1 to Q2
09:55:18.126 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Found cached Rabbit Channel
09:55:18.126 DEBUG [main][org.springframework.amqp.rabbit.core.RabbitTemplate] Executing callback on RabbitMQ Channel: Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:18.127 DEBUG [main][org.springframework.amqp.rabbit.core.RabbitTemplate] Publishing message on exchange [], routingKey = [txTestQ1]
09:55:18.242 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Returning cached Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:18.242 DEBUG [main][org.springframework.beans.factory.support.DefaultListableBeanFactory] Returning cached instance of singleton bean 'transactionManager'
09:55:18.243 DEBUG [main][org.springframework.amqp.rabbit.transaction.RabbitTransactionManager] Creating new transaction with name [foo.Service.process]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
09:55:18.243 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Found cached Rabbit Channel
09:55:18.243 DEBUG [main][org.springframework.amqp.rabbit.transaction.RabbitTransactionManager] Created AMQP transaction on channel [Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)]
09:55:18.243 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Bound value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@38ffd135] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] to thread [main]
09:55:18.243 TRACE [main][org.springframework.transaction.interceptor.TransactionInterceptor] Getting transaction for [foo.Service.process]
09:55:18.243 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Retrieved value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@38ffd135] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] bound to thread [main]
09:55:18.243 DEBUG [main][org.springframework.amqp.rabbit.core.RabbitTemplate] Executing callback on RabbitMQ Channel: Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:18.244 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Retrieved value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@38ffd135] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] bound to thread [main]
09:55:18.244 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Retrieved value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@38ffd135] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] bound to thread [main]
09:55:18.244 TRACE [main][org.springframework.transaction.interceptor.TransactionInterceptor] Completing transaction for [foo.Service.process] after exception: java.lang.RuntimeException: crash
09:55:18.244 TRACE [main][org.springframework.transaction.interceptor.RuleBasedTransactionAttribute] Applying rules to determine whether transaction should rollback on java.lang.RuntimeException: crash
09:55:18.245 TRACE [main][org.springframework.transaction.interceptor.RuleBasedTransactionAttribute] Winning rollback rule is: null
09:55:18.245 TRACE [main][org.springframework.transaction.interceptor.RuleBasedTransactionAttribute] No relevant rollback rule found: applying default rules
09:55:18.245 DEBUG [main][org.springframework.amqp.rabbit.transaction.RabbitTransactionManager] Initiating transaction rollback
09:55:18.245 DEBUG [main][org.springframework.amqp.rabbit.connection.RabbitResourceHolder] Rolling back messages to channel: Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:18.247 TRACE [main][org.springframework.transaction.support.TransactionSynchronizationManager] Removed value [org.springframework.amqp.rabbit.connection.RabbitResourceHolder@38ffd135] for key [CachingConnectionFactory [channelCacheSize=1, host=arwen3, port=5672, active=true]] from thread [main]
09:55:18.247 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Returning cached Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
crash
09:55:18.247 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Found cached Rabbit Channel
09:55:18.247 DEBUG [main][org.springframework.amqp.rabbit.core.RabbitTemplate] Executing callback on RabbitMQ Channel: Cached Rabbit Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
09:55:18.248 TRACE [main][org.springframework.amqp.rabbit.connection.CachingConnectionFactory] Returning cached Channel: AMQChannel(amqp://guest@127.0.1.1:5672/,1)
message bar still in Q1