I have a WIKI on how to do lazy loading from an external source (web service, database, etc.):
http://andrewfacelets.blogspot.com/2006/06/myfaces-tree2-creating-lazy-loading.html On 9/7/06, Jiang, Jane (NIH/NCI) [C] <[EMAIL PROTECTED]> wrote:
I've been using the 2nd method of tree2 lazy loading I learned from the wiki page. I overwrote the getChildren() method to load in the children. It works fine. I am very surprised that the tree slowed down. I tried to track down the problem and found that every time I try to expand one node, the getChildren() method gets called for all visible nodes. This behavior defeated half of the purpose of lazy loading since the sibling nodes actually get loaded right away. So we are actually loading one layer at a time, not one node at a time. To make the matter worse, if a node has no child nodes after the first round, the super.getChildren().size() == 0 is always true. So we repeatly goes to the database and try to find more children for those nodes. Has any one found a way to work around this problem? Is there a better way to do lazy loading? Thanks, Jane -----Original Message----- From: Andrew Robinson [mailto:[EMAIL PROTECTED] Sent: Monday, July 17, 2006 6:57 PM To: MyFaces Discussion Subject: Re: tree 2 -- lazy loading. Check the archives. You will see my post about a lazy-loading AJAX tree for jsf-comp On 7/17/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > Quick question: > > Is the MyFaces Tree2 lazy loadable? Any examples anywhere? > > Thanks in advance, > > --Brad. >
