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re: How to update GL eventlist from database?

by Kevin Day-7 :: Rate this Message:

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I haven't seen a response to this yet... Here's what's probably going on (these are from the javadocs on the ThreadSafeList factory method):

* <p>Using a {@link ThreadSafeList} for concurrent access to lists can be expensive

* because a {@link ca.odell.glazedlists.util.concurrent.ReadWriteLock ReadWriteLock}

* is aquired and released for every operation.

So replaceAllSorted is making a huge number of lock/unlock calls. You would be much better off managing the locks yourself, or doing these sorts of huge list updates to a list upstream of the ThreadSafeList (you'll still have to manage the locks for the big updates, natch).

- K

----------------------- Original Message -----------------------

From: philk phil.kursawe@...

To: users@...

Cc:

Date: Mon, 22 Jun 2009 13:16:07 -0700 (PDT)

Subject: How to update GL eventlist from database?

Hello,

I am struggling with updating my EventList with data from a database. I do
full table updates with the result set from the DB query like this:
GlazedLists.replaceAllSorted(items, getDBResult(), true, null);

All items are Comparable. However the update of the list is kind of akward.
The UI refreshes very slowly. I will make a video of it later. Maybe its a
threading issue? I am using a thread-safe base list for my items. Maybe I
should manually lock and unlock the table?

Do you have any recommendations on how to do full table updates using DB
results?

Thanks!
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« Return to Thread: How to update GL eventlist from database?