java - 使用 Spring AMQP 使用后自动从队列中删除消息

Question

我有 2 个应用程序使用 RabbitMQ 交换数据。我已经使用 Spring AMQP 实现了这一点。我有这样的场景:一旦消费者消费了消息，处理时可能会遇到异常。

如果出现任何异常，我计划登录数据库。一旦消息到达消费者，无论是成功处理还是遇到错误，我都必须显式地从队列中删除消息。

How to forcefully remove the message from queue otherwise it will be there if my application fails to process it?

下面是我的监听器代码

 @RabbitListener(containerFactory="rabbitListenerContainerFactory",queues=Constants.JOB_QUEUE)
            public void handleMessage(JobListenerDTO jobListenerDTO) {
                //System.out.println("Received summary: " + jobListenerDTO.getProcessXML());
                //amqpAdmin.purgeQueue(Constants.JOB_QUEUE, true);
                try{
                    Map<String, Object> variables = new HashMap<String, Object>();  
                    variables.put("initiator", "cmy5kor");

                    Deployment deploy = repositoryService.createDeployment().addString(jobListenerDTO.getProcessId()+".bpmn20.xml",jobListenerDTO.getProcessXML()).deploy();
                    ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(jobListenerDTO.getProcessId(), variables);

                    System.out.println("Process Instance is:::::::::::::"+processInstance);

                }catch(Exception e){

                    e.printStackTrace();
            }

配置代码

@Configuration
@EnableRabbit
public class RabbitMQJobConfiguration extends AbstractBipRabbitConfiguration {


    @Bean
    public RabbitTemplate rabbitTemplate() {
        RabbitTemplate template = new RabbitTemplate(connectionFactory());
        template.setQueue(Constants.JOB_QUEUE);
        template.setMessageConverter(jsonMessageConverter());
        return template;
    }


    @Bean
    public Queue jobQueue() {
        return new Queue(Constants.JOB_QUEUE);
    }


    @Bean(name="rabbitListenerContainerFactory")
    public SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory() {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factory.setConnectionFactory(connectionFactory());
        Jackson2JsonMessageConverter messageConverter = new Jackson2JsonMessageConverter();
        DefaultClassMapper classMapper = new DefaultClassMapper();
        Map<String, Class<?>> idClassMapping = new HashMap<String, Class<?>>();
        idClassMapping.put("com.bosch.diff.approach.TaskMessage", JobListenerDTO.class);
        classMapper.setIdClassMapping(idClassMapping);
        messageConverter.setClassMapper(classMapper);
        factory.setMessageConverter(messageConverter);
        factory.setReceiveTimeout(10L);
        return factory;
    }



}

Answer 1

我不知道 rmq 的 spring api 或配置，但这

 I have to remove message from the queue explicitly once the message reaches the consumer whether it is successful processing or error encountered.

这正是设置自动确认标志时发生的情况。这样，消息一旦被使用就会被确认 - 因此从队列中消失了。