java - Autowiring 具有 @Configuration @EnableScheduling @Component 注释的 bean 组件时出错

Question

我在小枝应用程序中工作
其中有一个类scheduledJob，具有以下注释

@Configuration
@EnableScheduling
@Component 
public class ScheduledJob {
//code
}

我需要将它自动连接到另一个类notificationServiceImpl。我给了

@Service
public class NotificationServiceImp implements NotificationService{
  @Autowired
  private ScheduledJob scheduledJob;
//code

}

我收到以下错误

06:23:36,678 WARN  [org.springframework.web.context.support.AnnotationConfigWebApplicationContext] (ServerService Thread Pool -- 99) Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'notificationServiceImp': Unsatisfied dependency expressed through field 'scheduledJob'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.storilabs.of.schedules.ScheduledJob' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
06:23:36,688 ERROR [org.springframework.web.context.ContextLoader] (ServerService Thread Pool -- 99) Context initialization failed: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'notificationServiceImp': Unsatisfied dependency expressed through field 'scheduledJob'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.storilabs.of.schedules.ScheduledJob' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:586) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:758) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) [spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) [spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:409) [spring-web-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291) [spring-web-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103) [spring-web-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at io.undertow.servlet.core.ApplicationListeners.contextInitialized(ApplicationListeners.java:187) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
    at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:216) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
    at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:185) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
    at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
    at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
    at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
    at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:250) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:96)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:78)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [rt.jar:1.8.0_271]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [rt.jar:1.8.0_271]
    at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
    at java.lang.Thread.run(Thread.java:748) [rt.jar:1.8.0_271]
    at org.jboss.threads.JBossThread.run(JBossThread.java:485)
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.storilabs.of.schedules.ScheduledJob' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1504) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1101) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1062) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:583) [spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    ... 36 more

我只是 Spring 的新手。请帮我解决这个问题。
编辑
预定的类(class)功能在预定的时间完美地工作。没有发现问题。但我目前的要求是添加一个更多选项来使用 API 调用触发此功能。这样我就可以随时通过发送这个 API 调用来启动一个新的触发器来发送通知。
我试图在没有 Autowiring 的情况下创建一个新对象(我知道这不是一个好方法)

ScheduledJob scheduledJob = new ScheduledJob();

并调用内部函数，如 scheduledJob.function()预定的类(class)功能在预定的时间完美地工作。当函数在预定时间工作时没有发现异常或任何东西。如果通过 API 调用函数调用，则在调用该函数中的某个其他 java 对象时发生了一些空指针异常。我认为此时其他 Autowiring 的对象可能未初始化

Answer 1

我认为您使用 @Configuration 注释的方式有问题。
我想在您的情况下，实现应该如下所示:

@Configuration
@EnableScheduling
public class AppConfig {
    @Bean
    public Task task() {
        return new Task();
    }
} 

@Configuration 只负责创建 bean。如果您以前使用过 xml 驱动的配置，那么它是一种 xml bean 定义替换。在上面的示例中，它创建了一个可以在应用程序中 Autowiring 的 bean。
调度 bean 的实际实现可以定义如下:

public class Task {
    @Scheduled(fixedRate=2000)
    public void doTask(){
        System.out.println("do some task");
    }
} 

这确实为您提供了实现的灵活性。