Question

当我在没有实现CommandLineRunner的情况下运行我的任务并添加@Scheduled注释时，似乎正在关闭上下文。如何保持上下文打开以便@Scheduled可以正常运行？

DataTransferTask.java

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DataTransferTask {
    public static void main(String[] args) {
        SpringApplication.run(DataTransferTask.class, args);
    }
}

DataTransferRunner.java

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.task.configuration.EnableTask;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.util.List;

@Component
@EnableTask
@EnableScheduling
public class DataTransferRunner {

    @Autowired
    public DataTransferRunner() {
    }

    @Scheduled(fixedRateString = "${job_concurrency.fixed-rate}")
    public void run() throws Exception {
       System.out.println("I started running");
    }
}

以下是我不断获得的例外

Caused by: java.lang.IllegalStateException: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@21526f6c has been closed already
    at org.springframework.context.support.AbstractApplicationContext.assertBeanFactoryActive(AbstractApplicationContext.java:1065) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBeanNamesForType(AbstractApplicationContext.java:1176) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.cloud.task.batch.configuration.TaskBatchExecutionListenerBeanPostProcessor.postProcessAfterInitialization(TaskBatchExecutionListenerBeanPostProcessor.java:59) ~[spring-cloud-task-batch-1.2.0.RELEASE.jar:1.2.0.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:423) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1633) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
    ... 73 common frames omitted

Answer 1

由于你有@EnableTask，一旦所有内容都运行完毕，spring将关闭上下文。从代码看起来你没有明确地运行任何东西，所以spring在你的@Schedule（）注释开始之前关闭了上下文。

对此的解决方法是告诉spring不要使用spring.cloud.task.closecontext_enable=false关闭上下文。这将使您的计划任务的上下文保持打开状态。这里有一些文档：https://docs.spring.io/spring-cloud-task/docs/1.2.2.RELEASE/reference/htmlsingle/#features-lifecycle

关于该物业的另一个说明。它在文档中显示closecontext_enable但在检查了日志和jar之后，该属性已被弃用并被close_context_enabled替换。

Spring Cloud任务调度上下文已关闭

1 个答案: