CODEWITHSUNDEEP
java
Volvic
Volvic

Reputation: 81

Running a java "background application" in application server

My experience with application servers is limited to some basic servlet coding, so I am not even sure how to frame this question appropriately.

I need to write a java program that runs on the (java) application server and continuously executes a certain method (it will check for files in a certain directory).

I have found a way to schedule the start of applications but need to know where to put the code that I would normally put in the main() method in a regular java program.

Upvotes: 3

Views: 2123

Answers (4)

Shekhar
Shekhar

Reputation:

One way of doing this is to write a Listener which implements ServletContextListener and you write you schedule your timer in contextInitialized method

Upvotes: 0

Touko
Touko

Reputation: 11779

Not answering straight to your question, but check out Spring Batch that could be useful.

Upvotes: 2

Vineet Reynolds
Vineet Reynolds

Reputation: 76709

You can use Quartz, or the EJB timer service (if you can learn EJBs) for this task.

If you have just a servlet container like Tomcat, it is preferable to go with Quartz. In fact, Quartz also comes with a web application to monitor a scheduler.

On the other hand, the EJB timer service is available in all EJB containers that support EJB 2.1 and above.

Upvotes: 1

pjp
pjp

Reputation: 17629

Take a look at the servlet event listeners.

I think you should be able to hook into your code using a ServletContextListener.

http://onjava.com/pub/a/onjava/2001/04/12/listeners.html

Upvotes: 1

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