Exclude @Configuration from Spring Boot Application

Question

I have bunch of modules (say 3). Two are Spring boot based module and another one is Spring based. Say Module 1 - SpringBoot Module 2 - Spring Boot Module 3 - Common Module only Spring based

Module 3 @Configuration file defined which needs to be picked only by Module 2 and not 1.

I tried bunch of things to exclude the configuration file. For ex:-

@SpringBootApplication
@ComponentScan(basePackages = {"com.adobe"}
, excludeFilters = {
    @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = {WorkerConfig.class, WorkerExecutors.class, Worker.class})})
public class Application {

  private static final Logger logger = LoggerFactory.getLogger(Application.class);

  public static void main(String[] args) throws Exception {
    SpringApplication.run(Application.class, args);
  }

}

But Still the @Configiration Class is not getting excluded and Spring is trying to load it in application context which I dont want. My config class

@Configuration
public class WorkerConfig {

  @Bean
  public WorkerExecutors workerExec() {
    WorkerExecutors executors = new WorkerExecutors();
    return executors;
  }

}

Also I do read in @ComponentScan annotation that

 * <p>Note that the {@code <context:component-scan>} element has an
 * {@code annotation-config} attribute; however, this annotation does not. This is because
 * in almost all cases when using {@code @ComponentScan}, default annotation config
 * processing (e.g. processing {@code @Autowired} and friends) is assumed. Furthermore,
 * when using {@link AnnotationConfigApplicationContext}, annotation config processors are
 * always registered, meaning that any attempt to disable them at the
 * {@code @ComponentScan} level would be ignored.

So looks like excluding in Component Scan wont work. Other than above, I also tried excluding using

@SpringBootApplication(exclude= {WorkerExecutors.class, Worker.class,WorkerConfig.class})
public class Application {

But spring boot throws

java.lang.IllegalStateException: The following classes could not be excluded because they are not auto-configuration classes:
    - com.adobe.repository.worker.lib.config.WorkerConfig
    - com.adobe.acp.repository.worker.lib.core.WorkerExecutors
    - com.adobe.acp.repository.worker.lib.core.Worker

Any idea how can I disable component scanning a non spring boot module in a spring boot module other than putting in a different package. I dont want to put in different package.

Any help is appreciated!!

Answer 1

您可以尝试此方法对我有用：

@SpringBootApplication
@ComponentScan(excludeFilters  = {@ComponentScan.Filter(
              type = FilterType.ASSIGNABLE_TYPE, classes = {WorkerConfig.class, WorkerExecutors.class, Worker.class})})

Answer 2

自动配置包位于 org.springframework.boot.autoconfigure 下。这就是你不能这样做的原因：

@SpringBootApplication(exclude= {WorkerExecutors.class, Worker.class,WorkerConfig.class})

Spring 会按照你的指示去做。您正在呼叫：

@ComponentScan(basePackages = {"com.adobe"}
, excludeFilters = {
    @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = {WorkerConfig.class, WorkerExecutors.class, Worker.class})})

因此 Spring 不会加载任何这些 Worker 类。这就是为什么 Spring 不会“执行”用 @Configuration 注解的类。

也就是说，你想做的事情对我来说没有意义。听起来你有“模块”（java类），但它们都是同一个 spring 上下文的一部分。如果您有一个 Spring Context，那么您可以告诉 Spring 加载一些 @Configuration 类而不是其他类。然后，从您的“模块”中，您可以注入您需要的任何内容。模块 1 将从模块 3 注入 Bean，但模块 2 不会。就那么简单。

如果出于某种原因，您确实需要阻止模块 2 访问模块 3 中的 bean，但仍然保持模块 3 从模块 1 中可见，那么我会将模块 1 和模块 2 分开在两个不同的 Spring Boot 应用程序中，而模块 3 则成为公共代码。但这种方法可能会破坏您当前的架构。

2019 年 3 月 29 日星期五更新

尝试这个：

@SpringBootApplication
@ComponentScan(basePackages = { "com.myapp" }, excludeFilters = { @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = { MyClass2.class }) })

这对我有用。我有 MyClass 和 MyClass2，MyClass 已加载，而 MyClass2 未加载。我尝试使用 Spring Boot 1.5.9.RELEASE 和 Spring Bom 来获取所有依赖项。