5

我正在使用 spring amqp rabbitmq，并使用发送消息

Message message = MessageBuilder
.withBody(item.toString().getBytes())
.setReplyTo("importReply")
.setCorrelationId(item.toString().getBytes()).build();

我的消息处理程序是

public class Foundation {   
    public Message importExchange(Message exchange) {
        System.out.println("Command:" + exchange.getBody());        
                Message message = MessageBuilder
                .withBody(exchange.getBody().toString().getBytes()).setCorrelationId(exchange.getMessageProperties().getCorrelationId()                                  .toString().getBytes()).build();

        return message; 
    }
}

我已经使用

<rabbit:listener-container
    connection-factory="rabbitConnectionFactory" concurrency="10">
    <rabbit:listener queues="${rabbitmq.import.queue}"
        ref="foundation" method="importExchange" />
    <rabbit:listener queues="${rabbitmq.import.reply.queue}"
        ref="importExchangeItemWriter" method="replyHandler" />
</rabbit:listener-container>

但我越来越低于执行

Execution of Rabbit message listener failed, and no ErrorHandler has been set.
org.springframework.amqp.rabbit.listener.ListenerExecutionFailedException: Failed to invoke target method 'importExchange' with argument type = [class [B], value = [{[B@427829d8}]
    at org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter.invokeListenerMethod(MessageListenerAdapter.java:483)
    at org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter.onMessage(MessageListenerAdapter.java:374)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:647)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:573)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$001(SimpleMessageListenerContainer.java:75)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1.invokeListener(SimpleMessageListenerContainer.java:154)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1111)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:556)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:904)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:888)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$500(SimpleMessageListenerContainer.java:75)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:989)
    at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NoSuchMethodException: com.stockopedia.symfony.Foundation.importExchange([B)
    at java.lang.Class.getMethod(Class.java:1665)
    at org.springframework.util.MethodInvoker.prepare(MethodInvoker.java:178)
    at org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter.invokeListenerMethod(MessageListenerAdapter.java:466)
    ... 12 more

并且类似的问题也在生产者端replyHandler

public void replyHandler(Message message) {
    System.out.println("In Reply Handler:" + message.getMessageProperties().getCorrelationId());

}

另外，如果 importExchange 有任何异常，我如何在 replyHandler 中获得异常？

4

2 回答 2

8

由于您使用 POJO 进行消息侦听，因此您无法处理消息。

您Foundation#importExchange应该接受消息正文（在您的情况下byte[]）并返回适合回复消息正文的内容。

replyHandler只是必须MessageListener执行。

该框架将为您做相关的事情。

于 2014-04-23T10:36:28.077 回答
2

或者您可以添加.setContentType="text/plain"，转换器将能够为您转换为字符串。

于 2014-04-23T12:11:12.660 回答