Question

我使用初始化程序创建了一个Spring Boot项目，我正在尝试创建我的第一条消息，但我不知道从哪里开始。我熟悉使用JEE的相同过程，所以我想我需要创建一个工厂，一个发件人和一个消费者。

有人能帮助我吗？

Answer 1

你的方法在一般意义上是正确的，但他就是骨架的样子。

第一个spring-boot为你提供了一个完美的配置文件结构，如果你使用像Netbeans这样的智能设备，那么通过添加spring-boot插件，你也可以在属性文件中自动完成。由于Spring对每个经纪人的行为有点不同，在我的例子中我将使用 ActiveMQ

只需在我们的构建路径上安装ActiveMQ，Spring Boot就会自动设置一个ActiveMQ代理。我们需要设置一些属性，使其成为内存代理，而不需要连接池。我们可以通过为Spring Boot设置两个属性来实现这一目的。

spring.activemq.in-memory=true
spring.activemq.pooled=false
jms.bookmgrqueue.name=book-mgr-queue #queue name

也可以为其他经纪人进行类似的配置。

首先，您从Spring应用程序的设置开始。您应该放置@EnableJms注释以启用Jms支持，然后设置新队列。

实施例

@EnableJms
@Configuration
public class JmsConfiguration {

    @Autowired
    private BeanFactory springContextBeanFactory;

    @Bean
    public DefaultJmsListenerContainerFactory containerFactory(ConnectionFactory connectionFactory) {
        DefaultJmsListenerContainerFactory factory =
                new DefaultJmsListenerContainerFactory();
        factory.setConnectionFactory(connectionFactory);
        factory.setDestinationResolver(new BeanFactoryDestinationResolver(springContextBeanFactory));
        factory.setConcurrency("3-10");
        return factory;
    }

    @Bean
    public JmsTemplate jmsTemplate(ConnectionFactory connectionFactory) throws JMSException {
        return new JmsTemplate(connectionFactory);
    }

}

收听队列消息

侦听器组件（BookMgrQueueListener.java）使用带有选择器的Spring @JmsListener注释来读取具有给定操作头的消息。

@Component
public class BookMgrQueueListener implements Loggable{

    private final BookService bookService;

    @Autowired
    public BookMgrQueueListener(BookService bookService) {
        this.bookService = bookService;
    }

    @JmsListener(containerFactory = "containerFactory",
                 destination = "bookMgrQueueDestination",
                 selector = "Operation = 'Create'")
    public void processCreateBookMessage(BookDTO book) throws JMSException{
        bookService.createNew(book);
    }

    @JmsListener(containerFactory = "containerFactory",
                 destination = "bookMgrQueueDestination",
                 selector = "Operation = 'Update'")
    public void processUpdateBookMessage(BookDTO book) throws JMSException{
        bookService.update(book.getIsbn(), book);
    }

    @JmsListener(containerFactory = "containerFactory",
                 destination = "bookMgrQueueDestination",
                 selector = "Operation = 'Delete'")
    public void processDeleteBookMessage(BookDTO book) throws JMSException{
        bookService.delete(book.getIsbn());
    }

}

Active MQ for test

要测试配置，我们在新的配置文件ActiveMqConfiguration.java中设置activeMq代理。

@Configuration
public class ActiveMqConfiguration {

    public static final String ADDRESS = "vm://localhost";

    private BrokerService broker;

    @Bean(name="bookMgrQueueDestination")
    public Destination bookMgrQueueDestination(@Value("${jms.bookmgrqueue.name}") String bookMgrQueueName)
            throws JMSException {
        return new ActiveMQQueue(bookMgrQueueName);
    }

    @PostConstruct
    public void startActiveMQ() throws Exception {
        broker = new BrokerService();
        // configure the broker
        broker.setBrokerName("activemq-broker");
        broker.setDataDirectory("target");
        broker.addConnector(ADDRESS);
        broker.setUseJmx(false);
        broker.setUseShutdownHook(false);
        broker.start();
    }

    @PreDestroy
    public void stopActiveMQ() throws Exception {
        broker.stop();
    }

    @Bean
    public ConnectionFactory connectionFactory() {
        return new ActiveMQConnectionFactory(ADDRESS + "?broker.persistent=false");
    }
}

我们正在测试用例中设置一个完整的应用程序上下文，但我们正在将侦听器中的BookService引用替换为MockedBookService，我们将使用它来验证是否执行了正确的调用。

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = Application.class, loader = SpringApplicationContextLoader.class)
@WebAppConfiguration
public class BookMgrQueueListenerIntegrationTest {

    @Autowired(required = false)
    private JmsTemplate jmsTemplate;

    @Autowired
    private BookMgrQueueListener bookMgrQueueListener;


    @Autowired(required = false)
    @Qualifier("bookMgrQueueDestination")
    private Destination bookMgrQueueDestination;

    @Mock
    private BookService mockBookService;

    @Captor
    private ArgumentCaptor<BookDTO> bookArgumentCaptor;

    @Before
    public void setUp(){
        MockitoAnnotations.initMocks(this);
        ReflectionTestUtils.setField(bookMgrQueueListener, "bookService", mockBookService);
    }

    /* ... tests */
}

最后，我们为所有操作添加测试，并验证是否使用正确的操作和参数调用了服务层。

/* ... */
public class BookMgrQueueListenerIntegrationTest {
    /* ... */
    @Test
    public void testSendCreateBookMessage(){
        BookDTO book =  new BookDTO("isbn", "title", "author");
        jmsTemplate.convertAndSend(bookMgrQueueDestination, book, Message -> {
            return OperationHeader.CREATE.applyToMessage(Message);
        });
        // verify
        verify(mockBookService).createNew(bookArgumentCaptor.capture());
        assertEquals(book.getIsbn(), bookArgumentCaptor.getValue().getIsbn());
        assertEquals(book.getTitle(), bookArgumentCaptor.getValue().getTitle());
        assertEquals(book.getAuthor(), bookArgumentCaptor.getValue().getAuthor());
    }

    @Test
    public void testSendUpdateBookMessage(){
        BookDTO book =  new BookDTO("isbn", "title", "author");
        jmsTemplate.convertAndSend(bookMgrQueueDestination, book, Message -> {
            return OperationHeader.UPDATE.applyToMessage(Message);
        });
        // verify
        verify(mockBookService).update(eq(book.getIsbn()), bookArgumentCaptor.capture());
        assertEquals(book.getIsbn(), bookArgumentCaptor.getValue().getIsbn());
        assertEquals(book.getTitle(),bookArgumentCaptor.getValue().getTitle());
        assertEquals(book.getAuthor(),bookArgumentCaptor.getValue().getAuthor());
    }

    @Test
    public void testSendDeleteBookMessage(){
        BookDTO book =  new BookDTO("isbn", "title", "author");
        jmsTemplate.convertAndSend(bookMgrQueueDestination, book, Message -> {
            return OperationHeader.DELETE.applyToMessage(Message);
        });
        // verify
        verify(mockBookService).delete(book.getIsbn());
    }

我们很高兴去！

参考Integrate JMS queue into a Spring Application

如何在spring boot中实现jms队列

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