自动装配具有 @Configuration @EnableScheduling @Component 注释的 bean 组件时出错
Error while Autowiring a bean component having @Configuration @EnableScheduling @Component annotations
我在 sprig 应用程序中工作
其中有一个 class scheduledJob，具有以下注释
@Configuration
@EnableScheduling
@Component
public class ScheduledJob {
//code
}
我需要将其自动连接到另一个 class 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[=12=](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.call(DeploymentManagerImpl.java:216) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
at io.undertow.servlet.core.DeploymentManagerImpl.call(DeploymentManagerImpl.java:185) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction.call(ServletRequestContextThreadSetupAction.java:42) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
at io.undertow.servlet.core.ContextClassLoaderSetupAction.call(ContextClassLoaderSetupAction.java:43) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create[=12=](SecurityContextThreadSetupAction.java:105)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=12=](UndertowDeploymentInfoService.java:1502)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=12=](UndertowDeploymentInfoService.java:1502)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=12=](UndertowDeploymentInfoService.java:1502)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=12=](UndertowDeploymentInfoService.java:1502)
at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:250) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:96)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.run(UndertowDeploymentService.java:78)
at java.util.concurrent.Executors$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
我是 spring 的新手。请帮我解决这个问题。
编辑
计划的 class 功能在计划的时间完美运行。没有发现问题。但我目前的要求是再添加一个选项来使用 API 调用来触发此功能。这样我就可以通过发送这个 API 调用来启动一个新的触发器来随时发送通知。
我试过在没有自动装配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()
计划的 class 功能在计划的时间完美运行。函数在预定时间运行时没有发现任何异常或任何异常。如果通过 API 调用函数调用，则在该函数中调用其他 java 对象时发生了一些空指针异常。我认为此时可能没有初始化其他自动装配对象
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。如果您之前使用过 xml 驱动配置，它就是一种 xml bean 定义替换。在上面的示例中，它创建了一个可以在您的应用程序中自动装配的 bean。
你的调度bean的真正实现可以定义如下：
public class Task {
@Scheduled(fixedRate=2000)
public void doTask(){
System.out.println("do some task");
}
}
这确实为您提供了实施的灵活性。
我在 sprig 应用程序中工作 其中有一个 class scheduledJob，具有以下注释
@Configuration
@EnableScheduling
@Component
public class ScheduledJob {
//code
}
我需要将其自动连接到另一个 class 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[=12=](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.call(DeploymentManagerImpl.java:216) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
at io.undertow.servlet.core.DeploymentManagerImpl.call(DeploymentManagerImpl.java:185) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction.call(ServletRequestContextThreadSetupAction.java:42) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
at io.undertow.servlet.core.ContextClassLoaderSetupAction.call(ContextClassLoaderSetupAction.java:43) [undertow-servlet-2.0.19.Final.jar:2.0.19.Final]
at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create[=12=](SecurityContextThreadSetupAction.java:105)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=12=](UndertowDeploymentInfoService.java:1502)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=12=](UndertowDeploymentInfoService.java:1502)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=12=](UndertowDeploymentInfoService.java:1502)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create[=12=](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.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
我是 spring 的新手。请帮我解决这个问题。
编辑 计划的 class 功能在计划的时间完美运行。没有发现问题。但我目前的要求是再添加一个选项来使用 API 调用来触发此功能。这样我就可以通过发送这个 API 调用来启动一个新的触发器来随时发送通知。
我试过在没有自动装配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()
计划的 class 功能在计划的时间完美运行。函数在预定时间运行时没有发现任何异常或任何异常。如果通过 API 调用函数调用，则在该函数中调用其他 java 对象时发生了一些空指针异常。我认为此时可能没有初始化其他自动装配对象
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。如果您之前使用过 xml 驱动配置，它就是一种 xml bean 定义替换。在上面的示例中，它创建了一个可以在您的应用程序中自动装配的 bean。
你的调度bean的真正实现可以定义如下：
public class Task {
@Scheduled(fixedRate=2000)
public void doTask(){
System.out.println("do some task");
}
}
这确实为您提供了实施的灵活性。