Introducing Spring Framework

Chapter 11 ■ Integrating Your Spring Application with External Systems
//Waiting a least 5 seconds so the message is consumed.
Thread.sleep(5000);
//After the JMS message and insert, must be 5 Documents
assertEquals(MAX_ALL_DOCS, engine.listAll().size());
}
Type documentType = new Type("WEB",".url");
assertEquals(MAX_WEB_DOCS, engine.findByType(documentType).size());
}
Listing 11-9 shows how to run the producer and consumer. There are two methods: testSpringJMS_1 for your
producer and testSpringJMS_2 for your consumer. Note that at some point you need to run the tests in order, and
JUnit has no guarantee of doing that. That’s why the @FixMethodOrder annotation was added and the test methods
were renamed so you can run this test and the methods will be executed in order.
RabbitMQ and Spring Rabbit
Now let’s do the next part where your other friend is waiting for you to send an XML message, but in this case using a
AMQP (Advance Message Queue Protocol), and he or she is using the RabbitMQ broker.
RabbitMQ is a messaging broker that uses AMQP, which is a wired protocol, meaning that it is not based on any
API implementation like JMS (only Java can run JMS). RabbitMQ provides a platform for your application to send and
receive messages and has several features, such as speed and reliability; a persistence mechanism for your messages;
clustering; high availability; multiple Client APIs in different programming languages; the ability to run in many
platforms, and other features.
Now for your Spring application, you need to install RabbitMQ and run it (for more information about how to
install RabbitMQ, see Appendix A). Make sure RabbitMQ is running by going to http://localhost:15672 in your
browser. See Figure 11-6.
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