NoSuchBeanDefinitionException: 没有“XInterceptor”类型的合格 bean

Question

I'm getting lost in making sure everything is annotated properly apparently. When i run a service that uses this new code, I get the error below. Isn't the interceptor a bean already with the @Component and then everything it needs to be a bean within is a bean?

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.demo...XInterceptor' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1654)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1213)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1167)
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857)
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760)
    ... 88 common frames omitted

Process finished with exit code 1

I have a someDecorator class that uses the intercepter that I have made changes to:

@Component 
@RequiredArgsConstructor 
public class someDecorator { 

    private final XInterceptor xInterceptor; 
    ...
    private void useTheInterceptor(...) {
      ...
      aList.add(xInterceptor) // and use it for later
    }
}

Now the xInterceptor , which uses a another class YProvider

@Component
@RequiredArgsConstructor
public class xInterceptor {

    private final YProvider yProvider;

    public ClientHttpResponse intercept(String str, ...) throws IOException {

        Consumer<String> loggingConsumer = yProvider.getLoggingLevel(str);
        // ... use the consumer 
    }

The YProvider is where it gets interesting, it has a two values. ZProperties which is a config class and a consumer map.

@RequiredArgsConstructor
public class YProvider {

    private final ZProperties zProperties;
    private final Map<String, Consumer<String>> consumers;

    public Consumer<String> getLoggingLevel(String str) {
       // gets a single consumer from zProperties.getExampleMap ...
}

ZProperties just captures a map from an application.yml file:

@Configuration
@ConfigurationProperties(prefix = "some-config")
@EnableConfigurationProperties
@Getter
@Setter
public class ZProperties {
    private Map<String, String> exampleMap;
}

Now to populate the consumers map in YProvider and to set up YProvider , I have another config ConsumerConfig

@Configuration
public class ConsumerConfig {

    @Bean
    public YProvider yProvider(ZProperties zProperties) {
        return new YProvider(zProperties, exmapleMapToConsumerConfiguration());
    }

    public Map<String, Consumer<String>> exmapleMapToConsumerConfiguration() {
        Map<String, Consumer<String>> exmapleMapToConsumerMap = new ConcurrentHashMap<>();
        // add stuff to map

        return exmapleMapToConsumerMap;
    }
}

Answer 1

It could be because you didn't provide the XInterceptor as a Bean in you configuration file.

Try adding this to your ConsumerConfig class.

    @Bean
    public XInterceptor getXInterceptor(){
     return new XInterceptor();
    }

Answer 2

由于我将这些文件放在不同的包中，因此我必须添加@ComponentScan以及 Intercepter+Provider 所在位置的包名称和配置文件所在位置的包。