如何在Spring 4.0.2中的@Scheduled方法中获取当前会话（HttpSession）对象？

Question

I am using Spring 4.0.2 for my Web Application. My Web Application is about file processing. There are some statues about files like "In Progress", "On Hold", "Completed" . One user can complete multiple files, but only one at a time. So at a time only one file must be "In Progress" for a single user. Now, I want to check after every 15 mins whether is there any event occurred with particular file or not. If there is no event occurred, I want to change file status from "In Progress" to "On Hold". So that I tried to write Scheduler in Spring as given below.

@Scheduler(fixedDelay = 15*60*1000)
public void checkFrequently()
{
   // here I am doing some operation to check for any event occurred in last 15 min or not.
   // here, I need HttpSession for two purposes. 
   // 1. to get current logged in user
   // 2. to get current file for current user
}

Is there any possibility to get session in this method? If it is impossible, what are the alternatives?

Answer 1

It is not possible. The scheduler is started at application launch, when there is no session, and runs in a thread separated from the servlet container.
Usually, you will persist in some form the states that you would like to make accessible by bean managed by the scheduler (being in a database, a plain file, a queue, etc...)