在Rabbitmq配置Spring Boot中的AMQP中配置多個Vhost

Question

我正在實施一個項目，我必須在Rabbitmq中的不同虛擬主機之間發送消息。 使用SimpleRoutingConnectionFactory但得到java.lang.IllegalStateException：無法確定查找鍵[null]的目標ConnectionFactory。 誰知道下面如何實現這樣的人是我的配置類代碼。

@Configuration
@EnableRabbit
public class RabbitMQConfiguration {

@Autowired
ConnectionProperties connect;

// client1 exchanges
@Bean
public TopicExchange client1Exchange() {
    TopicExchange ex = new TopicExchange("ex_client1");
    ex.setAdminsThatShouldDeclare(client1());
    return ex;
}

// client2 exchange
@Bean
public TopicExchange client2Exchange() {
    TopicExchange ex = new TopicExchange("ex_client2");
    ex.setAdminsThatShouldDeclare(client2Admin());
    return ex;
}

@Bean
public Queue client1Queue() {
    Queue queue = new Queue("client1_queue");
    queue.setAdminsThatShouldDeclare(client1());
    return queue;
}

@Bean
public Binding client1Binding() {
    Binding binding = BindingBuilder.bind(client1Queue())
            .to(client1Exchange())
            .with("client1_key");
    binding.setAdminsThatShouldDeclare(client1());
    return binding;
}


@Bean
public Queue client2Queue() {
    Queue queue = new Queue("client2_queue");
    queue.setAdminsThatShouldDeclare(client2());
    return queue;
}

@Bean
public Binding client2Binding() {
    Binding binding = BindingBuilder.bind(client2Queue())
            .to(client2Exchange())
            .with("client2_key");
    binding.setAdminsThatShouldDeclare(client2());
    return binding;
}

@Bean
@Primary
public ConnectionFactory connectionFactory() {
    SimpleRoutingConnectionFactory connectionFactory = new SimpleRoutingConnectionFactory();
    Map<Object, ConnectionFactory> targetConnectionFactories = new HashMap<>();
    targetConnectionFactories.put("client1", client1ConnectionFactory());
    targetConnectionFactories.put("client2", client2ConnectionFactory());
    connectionFactory.setTargetConnectionFactories(targetConnectionFactories);
    return connectionFactory;
}

@Bean
public ConnectionFactory client1ConnectionFactory() {
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory(connect.getRabbitMQHost());
    connectionFactory.setVirtualHost(connect.getRabbitMQClient1VHost());
    connectionFactory.setUsername(connect.getRabbitMQClient1User());
    connectionFactory.setPassword(connect.getRabbitMQClient1Pass());
    return connectionFactory;
}

@Bean
public ConnectionFactory client2ConnectionFactory() {
    CachingConnectionFactory connectionFactory = new CachingConnectionFactory(connect.getRabbitMQHost());
    connectionFactory.setVirtualHost(connect.getRabbitMQClient2VHost());
    connectionFactory.setUsername(connect.getRabbitClient2User());
    connectionFactory.setPassword(connect.getRabbitClient2Pass());
    return connectionFactory;
}

// You can comment all methods below and remove interface's implementation to use the default serialization / deserialization
@Bean
public RabbitTemplate rabbitTemplate() {
    final RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory());
    rabbitTemplate.setMessageConverter(producerJackson2MessageConverter());
    return rabbitTemplate;
}

@Bean
public Jackson2JsonMessageConverter producerJackson2MessageConverter() {
    return new Jackson2JsonMessageConverter();
}

@Bean
public MappingJackson2MessageConverter consumerJackson2MessageConverter() {
    return new MappingJackson2MessageConverter();
}

@Bean
public DefaultMessageHandlerMethodFactory messageHandlerMethodFactory() {
    DefaultMessageHandlerMethodFactory factory = new DefaultMessageHandlerMethodFactory();
    factory.setMessageConverter(consumerJackson2MessageConverter());
    return factory;
}

@Bean
public TaskExecutor rabbitListenerExecutor() {
    int threads = Integer.valueOf(connect.getMinConsumers()) * 2; // threads = min consumers* no of queues
    final ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize(threads);
    executor.setMaxPoolSize(threads);
    executor.setThreadNamePrefix("RabbitThreadListener");
    executor.afterPropertiesSet();
    return executor;
}

@Bean
public SimpleRabbitListenerContainerFactory myRabbitListenerContainerFactory() {
    SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
    factory.setConnectionFactory(connectionFactory());
    factory.setConcurrentConsumers(Integer.valueOf(connect.getMinConsumers()));
    factory.setPrefetchCount(Integer.valueOf(connect.getPrefetchCount()));
    factory.setTaskExecutor(rabbitListenerExecutor());
    factory.setAcknowledgeMode(AcknowledgeMode.MANUAL);
    return factory;
}

@Bean
public RabbitAdmin client1() {
    RabbitAdmin rabbitAdmin = new RabbitAdmin(client1ConnectionFactory());
    rabbitAdmin.afterPropertiesSet();
    return rabbitAdmin;
}

@Bean
public RabbitAdmin client2() {
    RabbitAdmin rabbitAdmin = new RabbitAdmin(client2ConnectionFactory());
    rabbitAdmin.afterPropertiesSet();
    return rabbitAdmin;
}

}

我正在獲取此堆棧跟蹤

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$1.createConnection(ConnectionFactoryUtils.java:90)
    at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.doGetTransactionalResourceHolder(ConnectionFactoryUtils.java:140)
    at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.getTransactionalResourceHolder(ConnectionFactoryUtils.java:76)
    at org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.start(BlockingQueueConsumer.java:505)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1335)
    at java.lang.Thread.run(Thread.java:748)

Answer 1

RoutingConnectionFactory通常用於發布消息。

在偵聽器容器中使用路由工廠時，必須配置查找鍵以匹配在容器中配置的隊列名稱。

從文檔中 ：

同樣從1.4版開始，您可以在偵聽器容器中配置路由連接工廠。 在這種情況下，隊列名稱列表將用作查找關鍵字。 例如，如果使用setQueueNames("foo", "bar")配置容器，則查找鍵將為"[foo,bar]" （無空格）。

所以; 如果RabbitListener偵聽隊列foo則路由查找鍵必須為[foo] 。 （您可以使用不同的鍵多次添加相同的CF）。

或者，您可以簡單地創建多個容器工廠，每個工廠都有一個具體的CF，而不是路由CF。

編輯

假設您有

@RabbitListener(queues = "myQueue", connectionFactory = "myRabbitListenerContainerFactory")
public void listen(...) {
    ...
}

如果myQueue在client1的虛擬主機中，則需要在路由器CF映射中輸入一個條目，因此...

targetConnectionFactories.put("[myQueue]", client1ConnectionFactory());

...因為為偵聽器生成的偵聽器容器將在其查找鍵中使用隊列名稱。

或者 ，創建2個容器工廠； 每個都直接與client1和client2 CF連接，而不是與路由CF連接。

@Bean
public SimpleRabbitListenerContainerFactory client1ListenerContainerFactory() {

@Bean
public SimpleRabbitListenerContainerFactory client2ListenerContainerFactory() {

和

@RabbitListener(queues = "myQueue", connectionFactory = "client1ListenerContainerFactory")
public void listen(...) {
    ...
}

即，根本不將路由CF用於偵聽器-容器只有一個連接。