spring - 如何在春季启动中使用条件接口与列表中的值

Question

我有 application-sample.YAML 文件，其中有数据。加载数据后，基于某些字段。我想决定加载或不加载哪些组件。我可以看到下面的条件类首先加载，结果，我得到的数据为空，因为这个条件类在我的数据加载之前先加载。

@Configuration
public class AwsCondition implements Condition {
    
    @Autowired
    MyTestData data;
    
    @Override       
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
        // TODO Auto-generated method stub
        log.info("inside...........condition");
        if(data.getListeners().size()>1){
            return true;
        }
        return false;
    }

}

MyTestData.java

@Slf4j
@Data
@ConfigurationProperties
@Component
public class MyTestData implements InitializingBean {

List<Listener> listeners = new ArrayList<>();

    @Data
    public static class Listener {
        private String type;
        private String name;
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        
        if (this.getListeners().isEmpty()) {
            log.info("Nothing  configured. Please verify application-test.yml is configured properly.");
            System.exit(1);
        }
    }
}

条件测试类

@Component
@Conditional(AwsCondition.class)
public class TestS3ListenerRouter extends RouteBuilder {
 //My all logic lying here
}

标签： springspring-bootspring-annotations

Answer 1

尝试以下操作：

@Component
public class AwsCondition implements Condition {
    
    @Autowired
    MyTestData data;
    
    @Override       
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
        // TODO Auto-generated method stub
        log.info("inside...........condition");
        if(data.getListeners().size()>1){
            return true;
        }
        return false;
    }
}