Question

我希望不要求我的客户提供content_type application / json，但只是默认它。我得到了这个工作。

我还尝试结合另一个例子来实现ConditionalRejectingErrorHandler的自定义isFatal（Throwable t）。我可以启动我的自定义错误处理程序，但它似乎再次需要content_type属性。我无法弄清楚如何让它们同时工作。

有什么想法吗？

以下成功地不需要content_type 编辑：以下代码无法正常工作。必须已将具有属性content_type application / json的队列中的旧消息拉入

 @EnableRabbit
 @Configuration
 public class ExampleRabbitConfigurer implements 
 RabbitListenerConfigurer {

@Value("${spring.rabbitmq.host:'localhost'}")
private String host;

@Value("${spring.rabbitmq.port:5672}")
private int port;

@Value("${spring.rabbitmq.username}")
private String username;

@Value("${spring.rabbitmq.password}")
private String password;

@Autowired
private MappingJackson2MessageConverter mappingJackson2MessageConverter;

@Autowired
private DefaultMessageHandlerMethodFactory messageHandlerMethodFactory;

@Bean
public MappingJackson2MessageConverter mappingJackson2MessageConverter() {
   return new MappingJackson2MessageConverter();
}

@Bean
public DefaultMessageHandlerMethodFactory messageHandlerMethodFactory() {
   DefaultMessageHandlerMethodFactory factory = new DefaultMessageHandlerMethodFactory();
   factory.setMessageConverter(mappingJackson2MessageConverter);
   return factory;
}

@Override
public void configureRabbitListeners(final RabbitListenerEndpointRegistrar registrar) {
   registrar.setMessageHandlerMethodFactory(messageHandlerMethodFactory);
}

下面的内容适用于覆盖ConditionalRejectingErrorHandler中的isFatal（）。 SimpleRabbitListenerContainerFactory.setMessageConverter（）似乎应该与DefaultMessageHandlerMethodFactory.setMessageConverter（）起到相同的作用。显然事实并非如此。

 @EnableRabbit
 @Configuration
 public class ExampleRabbitConfigurer {

@Value("${spring.rabbitmq.host:'localhost'}")
private String host;

@Value("${spring.rabbitmq.port:5672}")
private int port;

@Value("${spring.rabbitmq.username}")
private String username;

@Value("${spring.rabbitmq.password}")
private String password;

@Autowired
ConnectionFactory connectionFactory;

@Autowired
Jackson2JsonMessageConverter jackson2JsonConverter;

@Autowired
ErrorHandler amqpErrorHandlingExceptionStrategy;

@Bean
public Jackson2JsonMessageConverter jackson2JsonConverter() {
    return new Jackson2JsonMessageConverter();
}

@Bean
public ErrorHandler amqpErrorHandlingExceptionStrategy() {
    return new ConditionalRejectingErrorHandler(new AmqpErrorHandlingExceptionStrategy());
}

@Bean
public SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory(ConnectionFactory connectionFactory) {
    SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
    factory.setConnectionFactory(connectionFactory);
    factory.setMessageConverter(jackson2JsonConverter);
    factory.setErrorHandler(amqpErrorHandlingExceptionStrategy);
    return factory;
}


public static class AmqpErrorHandlingExceptionStrategy extends ConditionalRejectingErrorHandler.DefaultExceptionStrategy {

    private final Logger LOGGER = org.slf4j.LoggerFactory.getLogger(getClass());

    @Override
    public boolean isFatal(Throwable t) {

        if (t instanceof ListenerExecutionFailedException) {
            ListenerExecutionFailedException lefe = (ListenerExecutionFailedException) t;
            LOGGER.error("Failed to process inbound message from queue "
                    + lefe.getFailedMessage().getMessageProperties().getConsumerQueue()
                    + "; failed message: " + lefe.getFailedMessage(), t);
        }
        return super.isFatal(t);
    }

}

默认为content_type application / json，使用来自DefaultExceptionStrategy

0 个答案: