CODEWITHSUNDEEP
javamultithreadingjspsessionjavabeans
sabu
sabu

Reputation: 2057

Thread in java bean

I have a session bean in JSP, and in that bean I am starting a thread that sleeps for 10 sec and executes again. The problem I am facing is, after logging out also this thread continues to run.

Can someone please help how to stop that from running?

Upvotes: 0

Views: 1651

Answers (2)

Jannik Jochem
Jannik Jochem

Reputation: 1546

According to the EJB specification, starting threads from EJBs is illegal. Cf. section 21.2.2 (page 593):

"The enterprise bean must not attempt to manage threads. The enterprise bean must not attempt to start, stop, suspend, or resume a thread, or to change a thread’s priority or name. The enterprise bean must not attempt to manage thread groups."

There may be a different solution using EJB or you may need to use a different framework. This depends on what exactly you are trying to accomplish.

Upvotes: 1

luukes
luukes

Reputation: 1540

Starting threads out of servlets is not a good idea because you may ran out of resources (memory and CPU) if you have many users. Especially with database access strange behaviour will occur!

Add a Quartz timer (http://quartz-scheduler.org) that triggers every 10secs and processes a list where your session beans have beed subscribed. On user logout unsubscribe your bean from your service again.

Upvotes: 0

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