Question

我已经实现了此处显示的示例Spring Dynamic Destination

在rabbitmq中，它正在动态创建交换，但没有提供绑定或路由密钥的选项。我的要求是使用路由密钥向此动态创建的交换发送消息。我如何实现这个来设置路由密钥？

@Component
public class DDProducerBean {

    @Autowired
    private BinderAwareChannelResolver poChannelResolver = null;

    public void publish(DDSocketVO ddSocketVO) throws Exception {
        this.poChannelResolver.resolveDestination(ddSocketVO.getDestination()).send(MessageBuilder.withPayload(new ObjectMapper().
                setVisibility(PropertyAccessor.FIELD, Visibility.ANY).
                writeValueAsString(ddSocketVO)).build());
    }

}

Answer 1

以下是建议Here

的解决方法

基本上使用BinderAwareChannelResolver创建一个带有动态目标的MessageChannel，然后使用RabbitAdmin API连接到RabbitMQ，并在发送消息之前将新创建的交换绑定到另一个队列或与路由密钥交换。

@Autowired
private BinderAwareChannelResolver poChannelResolver;

public void publish(WebSocketVO webSocketVO) throws Exception {

    MessageChannel channel = this.poChannelResolver.resolveDestination(webSocketVO.getDestination());

    CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
    connectionFactory.setUsername(System.getProperty("spring.cloud.stream.binders.corerabbit.environment.spring.rabbitmq.username"));
    connectionFactory.setPassword(System.getProperty("spring.cloud.stream.binders.corerabbit.environment.spring.rabbitmq.password"));
    connectionFactory.setAddresses(System.getProperty("spring.cloud.stream.binders.corerabbit.environment.spring.rabbitmq.addresses"));
    connectionFactory.setVirtualHost(System.getProperty("spring.cloud.stream.binders.corerabbit.environment.spring.rabbitmq.virtual-host"));

    AmqpAdmin amqpAdmin = new RabbitAdmin(connectionFactory);

    TopicExchange sourceExchange = new TopicExchange(webSocketVO.getDestination(), false, true);
    TopicExchange destExchange = new TopicExchange("amq.topic");

    amqpAdmin.declareBinding(BindingBuilder.bind(destExchange).to(sourceExchange).with(webSocketVO.getRoutingKeyExpression()));




    channel.send(MessageBuilder.withPayload(new ObjectMapper().
            setVisibility(PropertyAccessor.FIELD, Visibility.ANY).
            writeValueAsString(webSocketVO)).build());


    amqpAdmin.deleteExchange(webSocketVO.getDestination());

    connectionFactory.destroy();

}

Spring云流RabbitMQ动态路由消息

1 个答案: