Comments on: RESTful JSON + Dojo Data

By: Darrell Bulloch

Darrell Bulloch — Mon, 09 Apr 2012 18:19:14 +0000

@Kris: Please let me know if this is what you are after: (?)()43 (line 14) _3ad = [div.dojoxGridRowbar, div.dojoxGridRow, div.dojoxGridRow] (?)()43 (line 14) _3af = 196 (?)()43 (line 14) _3bd = 196 _3be = false (?)()43 (line 14) _483 = 0 _484 = 1000 (?)()43 (line 14) _4c7 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] req = Object { start=0, count=1000, isRender=true, more...} toString()dojo.js (line 14) toString()dojo.js (line 14) (?)()103 (line 119) _1f = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) _105 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) _105 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) _105 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) _105 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Trial] dojo.Deferred {} toString()dojo.js (line 14) _105 = [Trial] dojo.Deferred {} toString()dojo.js (line 14) dfd = [Trial] dojo.Deferred {} toString()dojo.js (line 14) toString()dojo.js (line 14)

By: Darrell Bulloch

Darrell Bulloch — Sat, 07 Apr 2012 17:59:16 +0000

@Kris: The “churning” seems to occur after data has been received from the server via a xhr request, while Dojo is trying to process/render the data in the grid.

The response from the server consists of 100 objects with about 80 columns in each object.

The problem doesn’t account when the rowsPerPage is set to 25, instead of 1000.

I hope that helps.

If not, please advise regarding any other things I can do to better identify the problem.

By: Darrell Bulloch

Darrell Bulloch — Sat, 07 Apr 2012 17:46:24 +0000

@Kris: I believe the stack trace below is what's occurring when it "churns" (?)()43 (line 14) _3ad = [div.dojoxGridRowbar, div.dojoxGridRow, div.dojoxGridRow] (?)()43 (line 14) _3af = 196 (?)()43 (line 14) _3bd = 196 _3be = false (?)()43 (line 14) _483 = 0 _484 = 1000 (?)()43 (line 14) _4c7 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] req = Object { start=0, count=1000, isRender=true, more...} toString()dojo.js (line 14) toString()dojo.js (line 14) (?)()103 (line 119) _1f = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) _105 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) _105 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) _105 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) _105 = [Object { aircraftFromRange="04003", aircraftThruRange="04003", amendDate="2004-04-22 00:00:00.0", more...}, Object { amendDate="2004-04-14 00:00:00.0", amendNumber=0, buyerCode="25", more...}, Object { amendDate="2010-10-27 00:00:00.0", amendNumber=2, buyerCode="94", more...}, 997 more...] toString()dojo.js (line 14) toString()dojo.js (line 14) _ff = [Trial] dojo.Deferred {} toString()dojo.js (line 14) _105 = [Trial] dojo.Deferred {} toString()dojo.js (line 14) dfd = [Trial] dojo.Deferred {} toString()dojo.js (line 14) toString()dojo.js (line 14)

By: Kris Zyp

Kris Zyp — Sat, 07 Apr 2012 03:32:05 +0000

@Darrell: You can click on the pause button in the debugger to stop it while it is churning and see what it is working on.

By: Darrell Bulloch

Darrell Bulloch — Fri, 06 Apr 2012 19:23:42 +0000

@Kris: I am unable to capture a stack track. Clicking the “Debug Script” option just results in the continual display of the same options, Continue, Debug script, or Stop script.

Is there anything I need to do or install in order to generate the stack trace?

By: Kris Zyp

Kris Zyp — Thu, 05 Apr 2012 15:45:34 +0000

@Darrell: If you could choose to debug the script and let us know what the stack trace is and we can try to help. Note that this error message can indicate a problem anywhere in your application, and may not be specific to the JsonRestStore or the grid, it is very ambiguous.

By: Darrell Bulloch

Darrell Bulloch — Sun, 01 Apr 2012 02:19:44 +0000

Thanks very much Kris.

That worked. But…

Now the app is constantly getting a “Warning; Unresponsive script” message:

“A script on this page may be busy, or it may have stopped responding. You can stop the script now, open the script in the debugger, or let the script continue.

Script: http://localhost:8080/dojotoolkit/1.5.0/dojo.dojo.js:27”

I have the option to Continue, Debug script, or Stop script.

By: Kris Zyp

Kris Zyp — Sat, 31 Mar 2012 21:47:58 +0000

@Darrell: The store doesn’t define the count, that is defined in the fetch request. In your case, I presume the fetch request is coming from the DataGrid (it has a default count of 25). If you want to change that, change the rowsPerPage property on the DataGrid to a higher number.

By: Darrell Bulloch

Darrell Bulloch — Sat, 31 Mar 2012 17:45:26 +0000

I tried the following:

POISR_MAIN.store = new dojox.data.JsonQueryRestStore({
target: “xhreq?action=getPoisr×tamp=” + new Date().getTime() + “&sort=” + dojo.toJson(POISR_GLOBAL.sort) + “&criteria=” + encodedCriteria + “&count=”,
idAttribute: “poisrId”,
fetch: function(request) {
request["count"] = 1000;
this.inherited(“fetch”, arguments);
}
});

This worked for the 1st request sent to the server: Range items=0-999

But, the 2nd request sent to the server was: Range items=25-1024
which still used the 25 offset.

I expected the 2nd request to be: Range items=1000-1999

By: Darrell Bulloch

Darrell Bulloch — Sat, 31 Mar 2012 17:12:22 +0000

How can I change the default Range from items=0-24 to some larger value, say items=0-1000?

I believe that would provide better performance by querying the server less often.