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rabbitmqspring-integrationspring-amqp

Spring AMQP Inbound Adapter with empty queue name

I'm developing a consumer application using Spring AMQP that receives messages from RabbitMQ. There is a topic exchange declared. To connect to Rabbit I create a queue with an empty name, because the broker will provide an automatic queue name, see the InterCor M4 Upgraded Specifications Hybrid specifications:

@Bean
public TopicExchange exchange() {
    TopicExchange topicExchange = new TopicExchange(topicExchangeName);
    topicExchange.setShouldDeclare(false);
    return topicExchange;
}

@Bean
public Queue queue() {
  return new Queue("", queueDurable, queueExclusive, queueAutoDelete, queueParameters);
}

@Bean
public Binding binding(Queue queue, TopicExchange exchange) {
    return BindingBuilder.bind(queue).to(exchange).with(routingKey);
}

But when I try to configure an AMQP Inbound Channel Adapter using the Spring Integration Java DSL:

@Autowired
private Queue queue;

@Bean
public IntegrationFlow amqpInbound(ConnectionFactory connectionFactory) {
  return IntegrationFlows.from(Amqp.inboundAdapter(connectionFactory, queue))
      .handle(m -> System.out.println(m.getPayload()))
      .get();
}

I get an error 'queueName' cannot be null or empty

2018-05-25 13:39:15.080 ERROR 14636 --- [erContainer#0-1] o.s.a.r.l.SimpleMessageListenerContainer : Failed to check/redeclare auto-delete queue(s).

java.lang.IllegalArgumentException: 'queueName' cannot be null or empty
    at org.springframework.util.Assert.hasText(Assert.java:276) ~[spring-core-5.0.6.RELEASE.jar:5.0.6.RELEASE]
    at org.springframework.amqp.rabbit.core.RabbitAdmin.getQueueProperties(RabbitAdmin.java:337) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.redeclareElementsIfNecessary(AbstractMessageListenerContainer.java:1604) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:963) [spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_162]

How can I set a value of the message queue name to an empty string?

Solution

  • The AMQP-816 issue has been fixed and now is available in Spring Boot 2.1.0.

    Updating the parent of the project fixes the issue:

    <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.1.0.RELEASE</version>
</parent>

    Empty queue name

    spring:
    rabbitmq:
        queue:
            name:
            durable: false
            exclusive: true
            autoDelete: true

    creates an automatic queue name amq.gen-U1vKiSfIvy8bO11jLD29Sw:

    Empty queue name

    Non-empty queue name

    spring:
    rabbitmq:
        queue:
            name: abc
            durable: false
            exclusive: true
            autoDelete: true

    creates a queue named abc:

    Non-empty queue name