[ http://jira.codehaus.org/browse/DISPL-129?page=comments#action_45425 ]
Frank Fischer commented on DISPL-129: ------------------------------------- Hi Jean, do you have an example of the usage of your implementation? I didn't manage to get it to run. I use (pseudo-code) <display:table list="allJobs" id="iterJob"....> ... <c:out value="iterJob.name"/> ... where allJobs is in fact an instance of an object implementing the PaginatedList interface. But my code is complainig that iterJob has no property name. I checked your code and added some debugging before I realize that within the class TableTag at method initParameters() at the position if (this.list instanceof PaginatedList) this.list is in fact null. So either I made a bigger mistake or there is something wrong with the code... > allow for partial lists where the rest remains in DB > ---------------------------------------------------- > > Key: DISPL-129 > URL: http://jira.codehaus.org/browse/DISPL-129 > Project: DisplayTag > Type: Improvement > Components: Paging/Sorting > Versions: 1.0 RC2 > Reporter: fabrizio giustina > Fix For: 1.1 > Attachments: patch.zip > > > ==== > imported from sf tracker > id 951204 > submitted by Ralf Hauser - ralfhauser > http://sourceforge.net/support/tracker.php?aid=951204 > ==== > displaytag is an amazing tool to spare end-users the > long download times of huge tables and make tables more > versatile. > When tables get really big, this approach still might > be problematic because the java.util.List a) take a > long time to assemble from the DB and b) may end up so > big that it will be a problem if there are multiple > parallel user sessions with huge java.util.List (or > request.setAttribute... as alternative to sessions) > Suggestion: > ========= > Allow to only provide partial lists to begin with - the > "display:table" tag as per > http://displaytag.sourceforge.net/tagreference.html#Attributes > would need the following additional attributes: > 1) list-size- default would be the size of the > java.util.List, otherwise, the programmer should > retrieve that number with SELECT COUNT(*) FROM ... > 2) call-back function name - e.g. struts action to call > with off-set parameter and rowcount if the rows to > display are not present in the partial list in the > request/session scope. On the DB-side e.g. SELECT * > FROM `TBL_MESSAGE` LIMIT 110, 145 is readily available > to do that > 3) listOffset (optional) - if java.util.List's first > entry is not what logically is considered the first element > obviously doing this is imcompatible with sort="list" > ==== > Date: 2004-09-13 17:45 > Sender: ralfhauserAccepting Donations > Logged In: YES > user_id=266141 > see a solution approach in > http://sourceforge.net/tracker/index.php?func=detail&aid=1026408&; > group_id=73068&atid=536613 > Date: 2004-09-07 03:51 > Sender: ianbdev > Logged In: YES > user_id=461701 > Hello, > I posted the 872183 request. > Since then we've come up with an alternate approach. > See [ 1023387 ] Pagination - use subList instead of iterating > all records. > If this change is implemented then you can implement a List > object that overrides the subList method of the List interface. > This would allow you to limit database/datasource accesses > to obtain just the few page records required for the page > being displayed. > No other changes to display tag are required. > Date: 2004-05-27 15:12 > Sender: carlossg > Logged In: YES > user_id=792979 > This has been already pointed out in RFE 872183 > Date: 2004-05-10 21:13 > Sender: smccrory > Logged In: YES > user_id=20779 > Also see https://sourceforge.net/tracker/index.php? > func=detail&aid=950819&group_id=73068&atid=536613 -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.codehaus.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ displaytag-devel mailing list displaytag-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/displaytag-devel
