Spring Amqp：将 SimpleRoutingConnectionFactory 与 @RabbitListener 混合

Question

我有一个应用程序会监听多个队列，这些队列在不同的虚拟主机上声明。我使用了一个 SimpleRoutingConnectionFactory 来存储一个 connectionFactoryMap，我希望用@RabbitListener 设置我的监听器。

根据 Spring AMQP 文档：

Also starting with version 1.4, you can configure a routing connection factory in a SimpleMessageListenerContainer. In that case, the list of queue names is used as the lookup key. For example, if you configure the container with setQueueNames("foo, bar"), the lookup key will be "[foo,bar]" (no spaces).

我用了@RabbitListener(queues = "some-key")。不幸的是，spring 抱怨 "lookup key [null]"。见下文。

18:52:44.528 WARN --- [cTaskExecutor-1] o.s.a.r.l.SimpleMessageListenerContainer : Consumer raised exception, processing can restart if the connection factory supports it java.lang.IllegalStateException: Cannot determine target ConnectionFactory for lookup key [null] at org.springframework.amqp.rabbit.connection.AbstractRoutingConnectionFactory.determineTargetConnectionFactory(AbstractRoutingConnectionFactory.java:119) at org.springframework.amqp.rabbit.connection.AbstractRoutingConnectionFactory.createConnection(AbstractRoutingConnectionFactory.java:97) at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.createConnection(ConnectionFactoryUtils.java:90) at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.doGetTransactionalResourceHolder(ConnectionFactoryUtils.java:140) at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.getTransactionalResourceHolder(ConnectionFactoryUtils.java:76) at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.start(BlockingQueueConsumer.java:472) at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1306) at java.lang.Thread.run(Thread.java:745)

我是不是做错了什么？如果队列属性用作查找键（用于连接工厂查找），我应该使用什么来指定我想收听哪个队列？
最终，我希望做programmatic/dynamic监听器设置。如果我使用 "Programmatic Endpoint Registration"，我是否应该删除 "Annotation-driven listener endpoints"？我喜欢 "Annotation-driven listener endpoints"，因为一个侦听器可以有多个消息句柄，将不同的传入数据类型作为参数，这非常干净整洁。如果我使用编程端点注册，我将不得不解析消息输入变量，并根据消息 type/content.

编辑： 嗨，加里，我稍微修改了您的代码 #2，以便它使用 Jackson2JsonMessageConverter 序列化 class 对象（在 RabbitTemplate bean 中），并使用它将它们反序列化回对象（在 inboundAdapter 中）。我还删除了@RabbitListener，因为在我的例子中，所有的监听器都会在运行时添加。现在 fooBean 可以毫无问题地接收整数、字符串和 TestData 消息！唯一留下的问题是程序不断报警告：

"[erContainer#0-1] o.s.a.r.l.SimpleMessageListenerContainer：消费者引发异常，如果连接工厂支持，处理可以重新启动

java.lang.IllegalStateException：无法确定查找键 [null] 的目标 ConnectionFactory。有关完整的堆栈跟踪，请参阅底部。

我错过了什么吗？

@SpringBootApplication
public class App2 implements CommandLineRunner {

    public static void main(String[] args) {
        SpringApplication.run(App2.class, args);
    }

    @Autowired
    private IntegrationFlowContext flowContext;

    @Autowired
    private ConnectionFactory routingCf;

    @Autowired
    private RabbitTemplate template;

    @Override
    public void run(String... args) throws Exception {
        // dynamically add a listener for queue qux
        IntegrationFlow flow = IntegrationFlows.from(Amqp.inboundAdapter(this.routingCf, "qux").messageConverter(new Jackson2JsonMessageConverter()))
                .handle(fooBean())
                .get();
        this.flowContext.registration(flow).register();

        // now test it
        SimpleResourceHolder.bind(this.routingCf, "[qux]");
        this.template.convertAndSend("qux", 42);
        this.template.convertAndSend("qux", "fizbuz");
        this.template.convertAndSend("qux", new TestData(1, "test"));
        SimpleResourceHolder.unbind(this.routingCf);
    }

    @Bean
    RabbitTemplate rabbitTemplate() {
        RabbitTemplate template = new RabbitTemplate(routingCf);
        template.setMessageConverter(new Jackson2JsonMessageConverter());
        return template;
    }

    @Bean
    @Primary
    public ConnectionFactory routingCf() {
        SimpleRoutingConnectionFactory rcf = new SimpleRoutingConnectionFactory();
        Map<Object, ConnectionFactory> map = new HashMap<>();
        map.put("[foo,bar]", routedCf());
        map.put("[baz]", routedCf());
        map.put("[qux]", routedCf());
        rcf.setTargetConnectionFactories(map);
        return rcf;
    }

    @Bean
    public ConnectionFactory routedCf() {
        return new CachingConnectionFactory("127.0.0.1");
    }

    @Bean
    public Foo fooBean() {
        return new Foo();
    }

    public static class Foo {

        @ServiceActivator
        public void handleInteger(Integer in) {
            System.out.println("int: " + in);
        }

        @ServiceActivator
        public void handleString(String in) {
            System.out.println("str: " + in);
        }

        @ServiceActivator
        public void handleData(TestData data) {
            System.out.println("TestData: " + data);
        }
    }
}

完整堆栈跟踪：

2017-03-15 21:43:06.413  INFO 1003 --- [           main] hello.App2                               : Started App2 in 3.003 seconds (JVM running for 3.69)
2017-03-15 21:43:11.415  WARN 1003 --- [erContainer#0-1] o.s.a.r.l.SimpleMessageListenerContainer : Consumer raised exception, processing can restart if the connection factory supports it

java.lang.IllegalStateException: Cannot determine target ConnectionFactory for lookup key [null]
    at org.springframework.amqp.rabbit.connection.AbstractRoutingConnectionFactory.determineTargetConnectionFactory(AbstractRoutingConnectionFactory.java:119) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.connection.AbstractRoutingConnectionFactory.createConnection(AbstractRoutingConnectionFactory.java:97) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.core.RabbitTemplate.doExecute(RabbitTemplate.java:1430) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1411) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1387) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.core.RabbitAdmin.initialize(RabbitAdmin.java:500) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.core.RabbitAdmin.onCreate(RabbitAdmin.java:419) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.connection.CompositeConnectionListener.onCreate(CompositeConnectionListener.java:33) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.connection.CachingConnectionFactory.createConnection(CachingConnectionFactory.java:571) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.createConnection(ConnectionFactoryUtils.java:90) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.doGetTransactionalResourceHolder(ConnectionFactoryUtils.java:140) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.getTransactionalResourceHolder(ConnectionFactoryUtils.java:76) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.start(BlockingQueueConsumer.java:505) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1382) ~[spring-rabbit-1.7.1.RELEASE.jar:na]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_112]

Answer 1

请展示您的配置 - 它对我来说工作正常...

@SpringBootApplication
public class So42784471Application {

    public static void main(String[] args) {
        SpringApplication.run(So42784471Application.class, args);
    }

    @Bean
    @Primary
    public ConnectionFactory routing() {
        SimpleRoutingConnectionFactory rcf = new SimpleRoutingConnectionFactory();
        Map<Object, ConnectionFactory> map = new HashMap<>();
        map.put("[foo,bar]", routedCf());
        map.put("[baz]", routedCf());
        rcf.setTargetConnectionFactories(map);
        return rcf;
    }

    @Bean
    public ConnectionFactory routedCf() {
        return new CachingConnectionFactory("10.0.0.3");
    }

    @RabbitListener(queues = { "foo" , "bar" })
    public void foobar(String in) {
        System.out.println(in);
    }

    @RabbitListener(queues = "baz")
    public void bazzer(String in) {
        System.out.println(in);
    }

}

关于你的第二个问题，你可以手动构建端点，但它非常复杂。在 Spring 集成 @ServiceActivator.

中使用类似功能可能更容易

我会尽快用详细信息更新此答案。

编辑

这是使用 Spring 集成技术在运行时动态添加多方法侦听器的更新...

@SpringBootApplication
public class So42784471Application implements CommandLineRunner {

    public static void main(String[] args) {
        SpringApplication.run(So42784471Application.class, args);
    }

    @Autowired
    private IntegrationFlowContext flowContext;

    @Autowired
    private ConnectionFactory routingCf;

    @Autowired
    private RabbitTemplate template;

    @Override
    public void run(String... args) throws Exception {
        // dynamically add a listener for queue qux
        IntegrationFlow flow = IntegrationFlows.from(Amqp.inboundAdapter(this.routingCf, "qux"))
                .handle(fooBean())
                .get();
        this.flowContext.registration(flow).register();

        // now test it
        SimpleResourceHolder.bind(this.routingCf, "[qux]");
        this.template.convertAndSend("qux", 42);
        this.template.convertAndSend("qux", "fizbuz");
        SimpleResourceHolder.unbind(this.routingCf);
    }


    @Bean
    @Primary
    public ConnectionFactory routingCf() {
        SimpleRoutingConnectionFactory rcf = new SimpleRoutingConnectionFactory();
        Map<Object, ConnectionFactory> map = new HashMap<>();
        map.put("[foo,bar]", routedCf());
        map.put("[baz]", routedCf());
        map.put("[qux]", routedCf());
        rcf.setTargetConnectionFactories(map);
        return rcf;
    }

    @Bean
    public ConnectionFactory routedCf() {
        return new CachingConnectionFactory("10.0.0.3");
    }

    @RabbitListener(queues = { "foo" , "bar" })
    public void foobar(String in) {
        System.out.println(in);
    }

    @RabbitListener(queues = "baz")
    public void bazzer(String in) {
        System.out.println(in);
    }

    @Bean
    public Foo fooBean() {
        return new Foo();
    }

    public static class Foo {

        @ServiceActivator
        public void handleInteger(Integer in) {
            System.out.println("int: " + in);
        }

        @ServiceActivator
        public void handleString(String in) {
            System.out.println("str: " + in);
        }

    }

}

Spring Amqp：将 SimpleRoutingConnectionFactory 与 @RabbitListener 混合

Spring Amqp: Mix SimpleRoutingConnectionFactory with @RabbitListener

rabbitmq

spring-amqp