以时间间隔运行 Java EE CDI 任务

问题描述

一旦我的应用程序 (WAR) 启动，我需要间隔运行任务，我使用的是 WildFly 21。 任务应该在启动时初始化并每隔一段时间执行一些工作。

课程在下面

@ApplicationScoped
@ActivateRequestContext
public class TaskRunner {

 
  @Resource private ManagedScheduledExecutorService scheduler;

  @Inject private ScheduledFuture<?> TaskRunnerScheduler;

  private boolean initialized = false;

  private void init(@Observes @Initialized(ApplicationScoped.class) Object init) {

    if (initialized) return;

   
    initialized = true;
    try {
      // Execute at startup
      TaskRunner = scheduler.schedule(this::runSchedule,getSchedule());
    } catch (Throwable throwable) {

    }
  }

  private void runSchedule() {
//do some work
  }

  private Trigger getSchedule() {
    return new Trigger() {
      @Override
      public Date getNextRunTime(LastExecution lastExecutionInfo,Date taskScheduledTime) {
        return Date.from(
            ZonedDateTime.now().withSecond(0).withNano(0).plusHours("4").toInstant());
      }

      @Override
      public boolean skipRun(LastExecution lastExecutionInfo,Date scheduledRunTime) 
       {return false;}};
  }

}

尝试部署应用程序时，出现以下错误

 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-6) MSC000001: Failed to start service jboss.deployment.unit."task-web.war".WeldStartService: org.jboss.msc.service.StartException in service jboss.deployment.unit."task-web.war".WeldStartService: Failed to start service
    at [email protected]//org.jboss.msc.service.ServiceControllerImpl$StartTask.execute(ServiceControllerImpl.java:1731)
    at [email protected]//org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1559)
    at [email protected]//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at [email protected]//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
    at [email protected]//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
    at [email protected]//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type ScheduledFuture<?> with qualifiers @Default
  at injection point [BackedAnnotatedField] @Inject private TaskRunner.TaskRunnerScheduler
  at TaskRunner.TaskRunnerScheduler(TaskRunner.java:0)

    at [email protected]//org.jboss.weld.bootstrap.Validator.validateInjectionPointForDeploymentProblems(Validator.java:378)
    at [email protected]//org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:290)
    at [email protected]//org.jboss.weld.bootstrap.Validator.validateGeneralBean(Validator.java:143)
    at [email protected]//org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:164)
    at [email protected]//org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:526)
    at [email protected]//org.jboss.weld.bootstrap.ConcurrentValidator$1.doWork(ConcurrentValidator.java:64)
    at [email protected]//org.jboss.weld.bootstrap.ConcurrentValidator$1.doWork(ConcurrentValidator.java:62)
    at [email protected]//org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:62)
    at [email protected]//org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:55)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)
    at [email protected]//org.jboss.threads.JBossThread.run(JBossThread.java:513)

知道这个错误的原因是什么吗？

解决方法

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