Introducing Spring Framework

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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. 159
Chapter 11 ■ Integrating Your Spring Application with External Systems Figure 11-6. The RabbitMQ Broker Main Page Next, you need to create the producer that will send messages to RabbitMQ. But how are you going to send AMQP messages? That’s right; by using Spring! The Spring Framework has Spring AMQP and Spring Rabbit modules that know how to talk AMQP and know how to communicate to RabbitMQ. Listing 11-10 shows the RabbitMQ producer. Listing 11-10. RabbitMQProducer.java package com.apress.isf.spring.amqp; import org.springframework.amqp.core.Message; import org.springframework.amqp.core.MessageProperties; import org.springframework.amqp.rabbit.core.RabbitTemplate; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import com.apress.isf.java.model.Document; import com.apress.isf.java.utils.XmlUtils; 160
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THE EXPERT’S VOICE ® IN SPRING
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Contents at a Glance About the Auth
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Introduction This book is an introd
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Part I Spring Framework Basics The
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Chapter 1 ■ Your First Spring App
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Chapter 2 ■ Working with Classes
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Chapter 3 Applying Different Config
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Chapter 3 ■ Applying Different Co
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Spring Stereotypes Chapter 3 ■ Ap
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Chapter 4 ■ Using Beans Scopes pu
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Chapter 4 ■ Using Beans Scopes Th
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Chapter 4 ■ Using Beans Scopes @A
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Chapter 4 ■ Using Beans Scopes do
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Chapter 5 ■ Working with Collecti
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Chapter 6 ■ Using Resource Files
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Chapter 7 Testing Your Spring Appli
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Chapter 7 ■ Testing Your Spring A
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Chapter 8 Give Advice to Your Sprin
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Chapter 8 ■ Give Advice to Your S
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Chapter 16 ■ Messaging with Your
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Chapter 17 Be Social and Go Mobile
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Chapter 17 ■ Be Social and Go Mob
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Part IV Spring I/O Spring I/O is no
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Chapter 18 ■ Spring and Groovy
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Chapter 18 ■ Spring and Groovy Li
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Chapter 19 ■ Spring Boot, Simplif
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Chapter 20 ■ Your First Spring XD
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Appendix A Installing Tools In this
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Appendix A ■ Installing Tools Fig
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Setting Environment Variables Appen
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Appendix A ■ Installing Tools 6.
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Appendix A ■ Installing Tools ■
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Stop MongoDB Server Appendix A ■
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Stop ActiveMQ Appendix A ■ Instal
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Installing RabbitMQ on Windows Appe
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Installing Spring XD on Windows App
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■ index • I I/O operations, 62
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■ index Spring application (cont.
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Introducing Spring Framework A Prim
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To my parents, Rocio Cruz and Felip
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■ Contents ■■Chapter 3: Apply
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■ Contents ■■Chapter 12: Expo
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■ Contents ■■Chapter 20: Your
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About the Author Felipe Gutierrez i
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Acknowledgments I would like to exp
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