Question

我正在尝试使用dropwizard应用程序中的Quartz作业调度程序来安排作业。在实现Quartz Job接口的类中，我注入了很少的服务类来使用它的方法。但它没有被注入，为该对象获取null。有人帮我这个吗？

JobManagerImpl类

public class MyJobManagerImpl {

private SchedulerFactory schedulerFactory;
private Scheduler scheduler;
private static final String group = "REFRESH";
private static final Logger logger = LoggerFactory.getLogger(TcConnectionRefreshJobManagerImpl.class);

public MyJobManagerImpl(Properties quartzConfig) {
    try {
        schedulerFactory = new StdSchedulerFactory(quartzConfig);
        scheduler = schedulerFactory.getScheduler();
        scheduler.start();
    } catch (SchedulerException e) {
        logger.error("Error starting scheduler", e);
    }
}


public boolean addJob(String name, int cronHour, int cronMinute) throws SchedulerException {
    JobDetail jobDetail = newJob(TcConnectionRefreshJob.class).withIdentity(name, group)
            .requestRecovery().build();
    String cronString = "0 " + cronMinute+" "+cronHour+" ? * *" ;
    CronTrigger cronTrigger = newTrigger().withIdentity(name, group).withSchedule(cronSchedule(cronString).
            withMisfireHandlingInstructionDoNothing()).build();
    scheduler.scheduleJob(jobDetail, cronTrigger);
    return true;
}

public boolean deleteJob(String name) {
    JobKey jobKey = JobKey.jobKey(name,group);
    TriggerKey triggerKey = TriggerKey.triggerKey(name,group);
    try {
        scheduler.unscheduleJob(triggerKey);
        scheduler.deleteJob(jobKey);
    } catch (SchedulerException e) {
        logger.error("Exception occurred "+e);
        return false;
    }
    return true;
}

ScheduledJob类

public class ScheduledJob implements Job {

public static IMyService myService;

@Override
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
    myService.executeAction();

}

@SuppressWarnings("static-access")
@Inject
public void setMyService(IMyService myService) {
    this.myService = myService;
}

MyService实现IMyService并将IMyService绑定到我的应用程序类中的MyService实现，如bind（IMyservice.class）.toInstance（new MyService（））;

Answer 1

目前question标记的Featured标签中有一个quartz-scheduler，它正好说明了Quartz作业中的DI。

到目前为止唯一有用的答案说明了以下内容（为方便起见，我介绍的链接）：

由于Quartz管理自己的线程，因此CDI不会处理类，因此您无法在Quartz类中注入bean。 deltaspike module的目的是允许在Quartz Jobs中注入CDI bean。在内部，deltaspike控制CDI上下文。

依赖注入不适用于Quartz Job预定类

1 个答案: