我有一个 Spring Boot 项目,我正在尝试与 RabbitMQ 服务器集成,以便我可以向队列发布消息和从队列读取消息。
这是我的rabbitmq配置(编辑后仅显示相关详细信息):
@Configuration
@ConfigurationProperties(prefix="rabbit")
public class RabbitConfig {
private String queue;
@Bean
Queue queue() {
return new Queue(queue, durable);
}
@Bean
public MessageConverter jsonMessageConverter(){
return new Jackson2JsonMessageConverter();
}
@Bean
SimpleMessageListenerContainer container(ConnectionFactory connectionFactory, Queue queue,
MessageListenerAdapter listenerAdapter, MessageConverter messageConverter) {
SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(connectionFactory);
container.setQueues(queue);
container.setMessageListener(listenerAdapter);
container.setMessageConverter(messageConverter);
return container;
}
@Bean
MessageListenerAdapter listenerAdapter(Receiver receiver) {
return new MessageListenerAdapter(receiver);
}
public void setQueue(String queue) {
this.queue = queue;
}
}
这是我的接收器课程:
public interface Receiver {
void handleMessage(FooA message);
}
@Component
public class RabbitReceiver implements Receiver {
@Override
public void handleMessage(FooA message) {
System.out.println(message);
}
}
还有我的pojo:
public class FooA {}
private double num;
private Map<String, String> map = new HashMap();
public FooA() {
}
public FooA(double num, Map<String, String> map) {
this.num = num;
this.map = map;
}
public int getnum() {
return num;
}
public Map<String, String> getMap() {
return map;
}
}
我能够成功发布FooA
消息对象到队列。这是队列中的样子:
[
{
"payload_bytes": 41,
"redelivered": false,
"exchange": "amq.fanout",
"routing_key": "",
"message_count": 0,
"properties": {
"priority": 0,
"delivery_mode": 2,
"headers": {
"__TypeId__": "com.test.FooA"
},
"content_encoding": "UTF-8",
"content_type": "application/json"
},
"payload": "{\"num\":1.2,\"map\":{}}",
"payload_encoding": "string"
}
]
但是当我尝试从队列中读取时,出现以下错误:
org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException: Failed to invoke target method 'handleMessage' with argument type = [class [B], value = [{[B@75a7bfc9}]
at org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter.invokeListenerMethod(MessageListenerAdapter.java:408) ~[spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter.onMessage(MessageListenerAdapter.java:298) ~[spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:822) ~[spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:745) ~[spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$001(SimpleMessageListenerContainer.java:97) [spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1.invokeListener(SimpleMessageListenerContainer.java:189) ~[spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1276) [spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:726) ~[spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1219) [spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1189) [spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1500(SimpleMessageListenerContainer.java:97) [spring-rabbit-1.7.3.RELEASE.jar:na]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1421) [spring-rabbit-1.7.3.RELEASE.jar:na]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]
Caused by: java.lang.NoSuchMethodException: com.test.RabbitReceiver.handleMessage([B)
at java.lang.Class.getMethod(Class.java:1786) ~[na:1.8.0_121]
at org.springframework.util.MethodInvoker.prepare(MethodInvoker.java:174) ~[spring-core-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter.invokeListenerMethod(MessageListenerAdapter.java:386) ~[spring-rabbit-1.7.3.RELEASE.jar:na]
... 12 common frames omitted
我究竟做错了什么?
Edit 1: 我将方法更改为:
@Override
public void handleMessage(byte[] message) {
System.out.println(message);
}
这有效,但完全无法使用。它只是显示如下:
我如何让它映射到我的 pojoFooA