Próbuję utworzyć prostą aplikację startową wiosnę z buta sprężyny, które „produkują” wiadomości do RabbitMQ wymiany/kolejki i innymi próbki bagażnika sprężyna app że „konsumować” te wiadomości. Więc mam dwie aplikacje (lub microservices jeśli chcesz). 1) "producent" mikroserwis 2) "konsument" mikroserwiswiosna bagażnika RabbitMQ MappingJackson2MessageConverter niestandardowy obiekt konwersja
"Producent" ma 2 obiekty domeny. Foo i Bar, które należy przekonwertować na json i wysłać do rabbitmq. „Konsument” należy odbierać i konwertować wiadomości json do domeny i Foo Bar odpowiednio. Z jakiegoś powodu nie mogę wykonać tego prostego zadania. Nie ma zbyt wielu przykładów na ten temat. dla wiadomości konwerter chcę używać org.springframework.messaging.converter.MappingJackson2MessageConverter
Oto co mam do tej pory:
PRODUCENT MICROSERVICE
package demo.producer;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.core.RabbitMessagingTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.messaging.converter.MappingJackson2MessageConverter;
import org.springframework.stereotype.Service;
@SpringBootApplication
public class ProducerApplication implements CommandLineRunner {
public static void main(String[] args) {
SpringApplication.run(ProducerApplication.class, args);
}
@Bean
Queue queue() {
return new Queue("queue", false);
}
@Bean
TopicExchange exchange() {
return new TopicExchange("exchange");
}
@Bean
Binding binding(Queue queue, TopicExchange exchange) {
return BindingBuilder.bind(queue).to(exchange).with("queue");
}
@Bean
public MappingJackson2MessageConverter jackson2Converter() {
MappingJackson2MessageConverter converter = new MappingJackson2MessageConverter();
return converter;
}
@Autowired
private Sender sender;
@Override
public void run(String... args) throws Exception {
sender.sendToRabbitmq(new Foo(), new Bar());
}
}
@Service
class Sender {
@Autowired
private RabbitMessagingTemplate rabbitMessagingTemplate;
@Autowired
private MappingJackson2MessageConverter mappingJackson2MessageConverter;
public void sendToRabbitmq(final Foo foo, final Bar bar) {
this.rabbitMessagingTemplate.setMessageConverter(this.mappingJackson2MessageConverter);
this.rabbitMessagingTemplate.convertAndSend("exchange", "queue", foo);
this.rabbitMessagingTemplate.convertAndSend("exchange", "queue", bar);
}
}
class Bar {
public int age = 33;
}
class Foo {
public String name = "gustavo";
}
MICROSERVICE KONSUMENTA
package demo.consumer;
import org.springframework.amqp.rabbit.annotation.EnableRabbit;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Service;
@SpringBootApplication
@EnableRabbit
public class ConsumerApplication implements CommandLineRunner {
public static void main(String[] args) {
SpringApplication.run(ConsumerApplication.class, args);
}
@Autowired
private Receiver receiver;
@Override
public void run(String... args) throws Exception {
}
}
@Service
class Receiver {
@RabbitListener(queues = "queue")
public void receiveMessage(Foo foo) {
System.out.println("Received <" + foo.name + ">");
}
@RabbitListener(queues = "queue")
public void receiveMessage(Bar bar) {
System.out.println("Received <" + bar.age + ">");
}
}
class Foo {
public String name;
}
class Bar {
public int age;
}
I tu jest wyjątek dostaję:
org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException: Listener method could not be invoked with the incoming message
Endpoint handler details:
Method [public void demo.consumer.Receiver.receiveMessage(demo.consumer.Bar)]
Bean [[email protected]]
at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:116)
at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.onMessage(MessagingMessageListenerAdapter.java:93)
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:756)
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:679)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$001(SimpleMessageListenerContainer.java:83)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1.invokeListener(SimpleMessageListenerContainer.java:170)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1257)
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:660)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1021)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1005)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$700(SimpleMessageListenerContainer.java:83)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1119)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.amqp.support.converter.MessageConversionException: Cannot handle message
... 13 common frames omitted
Caused by: org.springframework.messaging.converter.MessageConversionException: No converter found to convert to class demo.consumer.Bar, message=GenericMessage [payload=byte[10], headers={amqp_receivedRoutingKey=queue, amqp_receivedExchange=exchange, amqp_deliveryTag=1, amqp_deliveryMode=PERSISTENT, amqp_consumerQueue=queue, amqp_redelivered=false, id=87cf7e06-a78a-ddc1-71f5-c55066b46b11, amqp_consumerTag=amq.ctag-msWSwB4bYGWVO2diWSAHlw, contentType=application/json;charset=UTF-8, timestamp=1433989934574}]
at org.springframework.messaging.handler.annotation.support.PayloadArgumentResolver.resolveArgument(PayloadArgumentResolver.java:115)
at org.springframework.messaging.handler.invocation.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:77)
at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:127)
at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:100)
at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:113)
... 12 common frames omitted
Wyjątkiem mówi nie ma konwerter, i to prawda, mój problem jest to, że nie mam pojęcia jak ustawić MappingJackson2MessageConverter konwerter po stronie konsumentów (proszę pamiętać, że chcę użyć org.springframework .messaging.converter.MappingJackson2MessageConverter i nie org.springframework.amqp.support.converter.JsonMessageConverter)
Wszelkie myśli?
Na wszelki wypadek można wybulić ten przykładowy projekt w: https://github.com/gustavoorsi/rabbitmq-consumer-receiver
Spójrz tutaj: http://stackoverflow.com/questions/29337550/using-rabbitlistener-with-jackson2jsonmessageconverter – stalet
W tym przykładzie używa ** org.springframework.amqp.support.converter.Jackson2JsonMessageConverter ** (co należy do dependency spring-amqp), w moim przypadku chcę użyć ** org.springframework.messaging.converter.MappingJackson2MessageConverter ** (który należy do wiadomości wiosennych). – Gustavo