Spring 4 @AutoWired Failed
I am trying to use the websocket sample and here I am getting the error.
`@Configuration
@EnableWebSocketMessageBroker
@EnableScheduling
@Component
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
@Autowired
private SimpMessagingTemplate template;
private TaskScheduler scheduler = new ConcurrentTaskScheduler();
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/simplemessages").withSockJS();
}
/**
* Configure message broker options.
*/
@Override
public void configureMessageBroker(MessageBrokerRegistry config) {
config.enableSimpleBroker("/topic/", "/queue/");
config.setApplicationDestinationPrefixes("/app");
}
@PostConstruct
private void broadcastTimePeriodically() {
scheduler.scheduleAtFixedRate(new Runnable() {
public void run() {
template.convertAndSend("/topic/simplemessagesresponse", "Updated text "+new Date());
}
}, 1000);
}
@Override
public void configureClientInboundChannel(ChannelRegistration registration) {
}
@Override
public void configureClientOutboundChannel(ChannelRegistration registration) {
registration.taskExecutor().corePoolSize(4).maxPoolSize(10);
}
@Override
public boolean configureMessageConverters(List<MessageConverter> arg0) {
// TODO Auto-generated method stub
return false;
}
@Override
public void configureWebSocketTransport(WebSocketTransportRegistration arg0) {
}
}
`
Here is my Spring context xml
`
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.action" />
<context:annotation-config/>
<!-- <annotation-driven /> -->
</beans>
`
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webSocketConfig': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.messaging.simp.SimpMessagingTemplate com.action.WebSocketConfig.template; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brokerMessagingTemplate' defined in class path resource [org/springframework/web/socket/config/annotation/DelegatingWebSocketMessageBrokerConfiguration.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.messaging.simp.SimpMessagingTemplate org.springframework.messaging.simp.config.AbstractMessageBrokerConfiguration.brokerMessagingTemplate()] threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brokerMessageConverter' defined in class path resource [org/springframework/web/socket/config/annotation/DelegatingWebSocketMessageBrokerConfiguration.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.messaging.converter.CompositeMessageConverter org.springframework.messaging.simp.config.AbstractMessageBrokerConfiguration.brokerMessageConverter()] threw exception; nested exception is java.lang.IllegalArgumentException: Converters must not be empty
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:326)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1204)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
Can anyone tell me why?
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2 answers
Your problem is here:
@Override
public boolean configureMessageConverters(List<MessageConverter> arg0) {
// TODO Auto-generated method stub
return false;
}
I realize this is auto-generated code, but in my test case with your sample, I get this StackTrace:
Caused by: java.lang.IllegalArgumentException: Converters must not be empty
at org.springframework.util.Assert.notEmpty(Assert.java:268)
at org.springframework.messaging.converter.CompositeMessageConverter.<init>(CompositeMessageConverter.java:43)
at org.springframework.messaging.simp.config.AbstractMessageBrokerConfiguration.brokerMessageConverter(AbstractMessageBrokerConfiguration.java:266)
This means: either you have to return true
from this method to register the default converters, or add some of your own converters to this List<MessageConverter>
.
When I change it to a refund true
everything works well.
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I ran into this problem and had a lovely Saturday evening hours trying to figure it out. My problem was that I didn't include the websocket config in the root config.
@Configuration
@ComponentScan({ "xxx.yyy.controllers" })
@Import({SecurityConfig.class, WebSocketConfig.class})
public class RootConfig {
}
and then use it for application initializer
public class WebApplicationInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] { RootConfig.class };
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class[] { AppConfig.class };
}
@Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
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