Seam 中的异步方法总是返回 null QuartzTriggerHandle ？

发布于 2024-12-11 07:03:25 字数 1041 浏览 0 评论 0原文

Seam 中异步方法返回的 QuartzTriggerHandle 对象始终为“null”，作业已启动，但无法取消或暂停。

在 Seam 论坛中，我找到了下一个应该可以工作的示例，但它对我不起作用。

@Name("quartzObserver")
public class SCSQuartzObserver {

    @In(create = true)
    SCSQuartzTask quartzTask;

    @SuppressWarnings("unused")
    @Observer("org.jboss.seam.postInitialization")
    public void observe() {
        try {
            Calendar cal = Calendar.getInstance();
            cal.set(2040, Calendar.MAY, 10);
            QuartzTriggerHandle handle = quartzTask.performTask(new Date(),
                    86400000l);
            handle.cancel();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

@Name("quartzTask")
@AutoCreate
public class SCSQuartzTask {
    @Asynchronous
    public QuartzTriggerHandle performTask(@Expiration java.util.Date when,
            @IntervalDuration long duration) {
        // do stuff
        QuartzTriggerHandle handle = new QuartzTriggerHandle("SCSQuartzTask");
        return handle;
    }
}

谢谢帮助。

原文

QuartzTriggerHandle object that returned by Asynchronous method in Seam always 'null',
the job starts but cann't cancelled or paused.

In, seam forum i found the next example that should be work,but it doesn't work with me.

@Name("quartzObserver")
public class SCSQuartzObserver {

    @In(create = true)
    SCSQuartzTask quartzTask;

    @SuppressWarnings("unused")
    @Observer("org.jboss.seam.postInitialization")
    public void observe() {
        try {
            Calendar cal = Calendar.getInstance();
            cal.set(2040, Calendar.MAY, 10);
            QuartzTriggerHandle handle = quartzTask.performTask(new Date(),
                    86400000l);
            handle.cancel();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

@Name("quartzTask")
@AutoCreate
public class SCSQuartzTask {
    @Asynchronous
    public QuartzTriggerHandle performTask(@Expiration java.util.Date when,
            @IntervalDuration long duration) {
        // do stuff
        QuartzTriggerHandle handle = new QuartzTriggerHandle("SCSQuartzTask");
        return handle;
    }
}

thnx for help.

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一梦浮鱼 2024-12-18 07:03:25

您不应该创建 QuartzTriggerHandle。只需在performTask方法体中完成你的工作，seam运行时就会注意返回QuartzTriggerHandle对象。像这样的事情：

@Asynchronous
public QuartzTriggerHandle performTask(@Expiration java.util.Date when,
        @IntervalDuration long duration) {
    // do stuff
    return null;
}

QuartzTriggerHandle是可序列化的，您可以将其保存在数据库表中，以便稍后可以取消任务。

You shouldn't create the QuartzTriggerHandle. Just do your work in the body of the performTask method, seam runtime will take care to return the QuartzTriggerHandle object. Something like this:

@Asynchronous
public QuartzTriggerHandle performTask(@Expiration java.util.Date when,
        @IntervalDuration long duration) {
    // do stuff
    return null;
}

The QuartzTriggerHandle is serializable, you can keep it in a database table so you can later cancel the task.

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