Question

我正在处理一个涉及2个队列的项目，并且多个监听器与它们进行交互。流程：

新的HTTP请求到达服务器，然后它被转换为将成为消息的对象
此消息必须以两个队列发布
我有两种类型的监听器，它从每个队列中获取消息，然后我做任何我想做的事情

我一直在阅读，最好的方法是进行扇出交流。这是我的代码：

听者-configuration.xml文件

<!-- CREATE CONNECTION FACTORY -->
<rabbit:connection-factory id="connectionFactory"
    host="localhost" username="guest" password="guest" />

<rabbit:admin connection-factory="connectionFactory" />

<!-- <!-- RABBIT QUEUE'S -->
<rabbit:queue id="trashroute.rabbit.queue" name="trashroute.rabbit.queue" auto-delete="false" auto-startup=false
    durable="true" />
<!-- Webapp Queue -->
<rabbit:queue id="trashroute2.rabbit.queue" name="trashroute2.rabbit.queue" auto-delete="false" auto-startup=false
    durable="true" /> 

<!-- CREATE AN EXCHANGE AND BIND THE QUEUE WITH MY.ROUTINGKEY.* TO THE EXCHANGE -->
<rabbit:fanout-exchange id="myExchange" name="trashroute-exchange">
    <rabbit:bindings>
        <rabbit:binding queue="trashroute.rabbit.queue"></rabbit:binding>
        <rabbit:binding queue="trashroute2.rabbit.queue"></rabbit:binding>
    </rabbit:bindings>
</rabbit:fanout-exchange>

<!-- CREATE THE RABBIT TEMPLATES -->
<rabbit:template connection-factory="connectionFactory" exchange="myExchange" queue="trashroute.rabbit.queue"/>
<rabbit:template connection-factory="connectionFactory" exchange="myExchange" queue="trashroute2.rabbit.queue"/>

<!-- INSTANTIATE THE LISTENERS -->
<bean id="persistenceListener" class="trashroute.rabbitmq.listener.PersistenceListener" />
<bean id="webappListener" class="trashroute.rabbitmq.listener.WebappListener" />

<!-- CREATE THE JsonMessageConverter BEAN -->
<bean id="jsonMessageConverter" class="org.springframework.amqp.support.converter.JsonMessageConverter" />

<!-- GLUE THE LISTENER AND QUEUE TO THE LISTENER CONTAINER -->
<rabbit:listener-container id="listenerContainer"
    connection-factory="connectionFactory" message-converter="jsonMessageConverter">
    <rabbit:listener ref="persistenceListener" queues="trashroute.rabbit.queue" />
    <rabbit:listener ref="webappListener" queues="trashroute2.rabbit.queue" />
</rabbit:listener-container>

发件人-configuration.xml文件

<!--  First following line creates a rabbit connection factory with specified parameters -->
<rabbit:connection-factory id="connectionFactory" host="localhost" username="guest" password="guest" />

<!-- Obtain admin rights to create an exchange -->
<rabbit:admin connection-factory="connectionFactory" />

<!-- Create a bean which can send message to trashroute-exchange for the Java program to call -->
<rabbit:template id="template" connection-factory="connectionFactory"  exchange="myExchange"
message-converter="jsonMessageConverter" />


<bean id="rabbitTemplate" class="org.springframework.amqp.rabbit.core.RabbitTemplate">
<property name="connectionFactory" ref="rabbitConnectionFactory"/>
<property name="messageConverter">
    <bean class="org.springframework.amqp.support.converter.JsonMessageConverter"/>
</property>

Listener MainConfiguration.java

@Configuration
public class MainConfiguration {

protected final String persistenceQueue = "trashroute.rabbit.queue";
protected final String webappQueue = "trashroute2.rabbit.queue";

@Bean
public ConnectionFactory connectionFactory() {
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory("localhost");
    connectionFactory.setUsername("guest");
    connectionFactory.setPassword("guest");
    return connectionFactory;
}

@Bean
public AmqpAdmin amqpAdmin() {
    return new RabbitAdmin(connectionFactory());
}

@Bean
public DataController DataController(){
    return new DataController();
}

@Bean
// Every queue is bound to the default direct exchange
public Queue persistenceQueue() { 
    //Create a new queue with an specific name and the durability value in true.
    return new Queue(this.persistenceQueue, true);
}

@Bean
public Queue webappQueue() {
    //Create a new queue with an specific name and the durability value in true.
    return new Queue(this.webappQueue, true);
}
}

发件人MainConfiguration.java

@Configuration
public class SenderConfiguration {

protected final String persistenceQueue = "trashroute.rabbit.queue";
protected final String webappQueue = "trashroute2.rabbit.queue";

//Create the Template
@Bean
public RabbitTemplate rabbitTemplate() {
    RabbitTemplate template = new RabbitTemplate(connectionFactory());
    template.setMessageConverter(new JsonMessageConverter());
    return template;
}

@Bean
public ConnectionFactory connectionFactory() {
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory(
            "localhost");
    connectionFactory.setUsername("guest");
    connectionFactory.setPassword("guest");
    return connectionFactory;
}

@Bean
public IServiceManager scheduledProducer() {
    return new ServiceManagerImpl();
}

@Bean
public BeanPostProcessor postProcessor() {
    return new ScheduledAnnotationBeanPostProcessor();
}

}

有谁能告诉我我做错了什么？两个听众中的一个完美无缺，第二个听不到信息。

Answer 1

基于上面解释的场景，我尝试创建一个使用Spring Java Config的示例应用程序。

消息发布到None和Error个队列，相应的接收者（trashroute和webapp）会收到消息。

RabbitConfiguration.java（包含发件人和接收者的配置）

persistence

PersistenceListener.java

webapp

WebAppListener.java

@Configuration
@EnableRabbit
public class RabbitConfiguration {

    public static final String BROADCAST_TRASHROUTE_QUEUE = "trashroute.rabbit.queue";
    public static final String BROADCAST_WEBAPP_QUEUE = "webapp.rabbit.queue";

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


    @Bean
    public AmqpAdmin amqpAdmin() {
        return new RabbitAdmin(connectionFactory());
    }

    @Bean
    public Queue trashRouteQueue() {
        return new Queue(BROADCAST_TRASHROUTE_QUEUE);
    }

    @Bean
    public Queue webAppQueue() {
        return new Queue(BROADCAST_WEBAPP_QUEUE);
    }

    @Bean
    public RabbitTemplate rabbitTemplate() {
        RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory());
        return rabbitTemplate;
    }

    @Bean
    public FanoutExchange trashRouteExchange() {
        FanoutExchange exchange = new FanoutExchange("trashroute");
        return exchange;
    }

    @Bean
    public Binding trashRouteBinding() {
        return BindingBuilder.bind(trashRouteQueue()).to(trashRouteExchange());
    }

    @Bean
    public Binding webAppBinding() {
        return BindingBuilder.bind(webAppQueue()).to(trashRouteExchange());
    }

    @Bean
    SimpleMessageListenerContainer persistenceListenerContainer(ConnectionFactory connectionFactory, @Qualifier("persistenceListenerAdapter") MessageListenerAdapter listenerAdapter) {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        container.setQueues(trashRouteQueue(), webAppQueue());
        container.setMessageListener(listenerAdapter);
        return container;
    }

    @Bean
    MessageListenerAdapter persistenceListenerAdapter(PersistenceListener receiver) {
        return new MessageListenerAdapter(receiver, "receiveMessage");
    }

    @Bean
    SimpleMessageListenerContainer webAppListenerContainer(ConnectionFactory connectionFactory, @Qualifier("webAppListenerAdapter") MessageListenerAdapter listenerAdapter) {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        container.setQueues(trashRouteQueue(), webAppQueue());
        container.setMessageListener(listenerAdapter);
        return container;
    }

    @Bean
    MessageListenerAdapter webAppListenerAdapter(WebAppListener webAppListener) {
        return new MessageListenerAdapter(webAppListener, "receiveMessage");
    }

    @Bean
    PersistenceListener persistenceListener() {
        return new PersistenceListener();
    }

    @Bean
    WebAppListener webAppListener() {
        return new WebAppListener();
    }

}

Application.java

public class PersistenceListener {

    public void receiveMessage(String message) {
        System.out.println("Persistence Listener: Messsage Received <" + message + ">");
    }
}

希望这会有所帮助。如果你想在生产中使用它，你需要重构代码。

春季AMQP项目有2个队列

1 个答案: