How to implement really LONG running action ?

[zipito]

Hello.

I need to implement a really long running action. This is data import from old system to brand new SEAM-based system.

I wrote it using SEAM + Spring (Spring gave me the JdbcTemplate for running SELECTs and UPDATEs on old database, and SEAM gave me the SEAM :)

I've implemented it as the action for button :) and added importer.page.xml with <begin-conversation flush-mode="commit"/>

Recently it was ok. But now the import time received a huge increase (because of the greater parts of import). So when actually the action come to the end even session is expired. Increasing session timeout and conversation timeout - doesn't helped.

So is there any other possibility of implementing such thing.

P.S. the most funniest is that this huge bunch of code would be needed only once!

[kapitanpetko]

If it has to be run only once, does it have to be a web application? Write an SQL script or if not possible, a console application.

[zipito]

But I need to run it as the seam application. (I'm using seam's model,  entityManager and so on)...

[lvdberg]

Hi,

make it an Asynchronous task and add a ajax:push tag on your page, which gets riggered when the task has ended.

Leo

[kapitanpetko]

Ilya  Dyoshin wrote on Oct 29, 2009 10:51:


But I need to run it as the seam application. (I'm using seam's model,  entityManager and so on)...

So your application is not properly factored :) As already suggested, use @Asynchronous, that should do it. Could be trickier if you need to monitor progress, but not that much.

[luxspes]

This is what happens when you have a hammer (Seam), and start thinking all problems look like a nail (long running batch process).

You should probably have used something like Spring Batch for this, not Seam.