Finding out where TypeErrors are thrown - apache-flex

Question

I am having a problem that is driving me nuts.
Recently I configured my BlazeDS to use Array instead of ArrayCollection for performance reasons. Additionally I adjusted my templates to generate Array properties.
Everything wen't fine. All except one function that causes TypeError: Error #1034. These are being thrown before the result callback is called. It claims to have problems casting an ArrayCollection to Array. I removed the generated types to make Flex use Objects instead, but these did not contain any ArrayCollections. My question now is: How can I get the stack-traces of errors thrown in event-handlers?
I allready added handlers for unhandledExceptions in all of my modules and they are called if errors occur in code triggered from user-interaction, but they don't seem to be able to catch stuff thrown by event-handlers.
How can I track these Errors?
Chris
PS: The classes are:
package de.upw.ps.ucg.model.ucg.scheduler {
[Bindable]
[RemoteClass(alias="de.upw.ps.ucg.model.ucg.scheduler.Task")]
public class Task extends TaskBase {
}
}
And:
package de.upw.ps.ucg.model.ucg.scheduler {
import de.upw.ps.ucg.model.oval.common.OvalVersionedIdentifier;
import flash.utils.IExternalizable;
[Bindable]
public class TaskBase {
public function TaskBase() {}
private var _aborted:Boolean;
private var _characteristicsId:String;
private var _currentExecutorPhase:JobExecutorPhase;
private var _definitionSetName:String;
private var _definitionSetVid:OvalVersionedIdentifier;
private var _endTime:Date;
private var _enqueueTime:Date;
private var _environmentId:String;
private var _environmentName:String;
private var _messages:Array;
private var _numberOfDefinitions:int;
private var _processedNumberOfTests:int;
private var _resultsId:String;
private var _schedulerJob:SchedulerJob;
private var _startTime:Date;
private var _statusMessage:String;
private var _taskId:String;
private var _totalNumberOfTests:int;
public function set aborted(value:Boolean):void {
_aborted = value;
}
public function get aborted():Boolean {
return _aborted;
}
public function set characteristicsId(value:String):void {
_characteristicsId = value;
}
public function get characteristicsId():String {
return _characteristicsId;
}
public function set currentExecutorPhase(value:JobExecutorPhase):void {
_currentExecutorPhase = value;
}
public function get currentExecutorPhase():JobExecutorPhase {
return _currentExecutorPhase;
}
public function set definitionSetName(value:String):void {
_definitionSetName = value;
}
public function get definitionSetName():String {
return _definitionSetName;
}
public function set definitionSetVid(value:OvalVersionedIdentifier):void {
_definitionSetVid = value;
}
public function get definitionSetVid():OvalVersionedIdentifier {
return _definitionSetVid;
}
public function set endTime(value:Date):void {
_endTime = value;
}
public function get endTime():Date {
return _endTime;
}
public function set enqueueTime(value:Date):void {
_enqueueTime = value;
}
public function get enqueueTime():Date {
return _enqueueTime;
}
public function set environmentId(value:String):void {
_environmentId = value;
}
public function get environmentId():String {
return _environmentId;
}
public function set environmentName(value:String):void {
_environmentName = value;
}
public function get environmentName():String {
return _environmentName;
}
public function set messages(value:Array):void {
_messages = value;
}
public function get messages():Array {
return _messages;
}
public function set numberOfDefinitions(value:int):void {
_numberOfDefinitions = value;
}
public function get numberOfDefinitions():int {
return _numberOfDefinitions;
}
public function set processedNumberOfTests(value:int):void {
_processedNumberOfTests = value;
}
public function get processedNumberOfTests():int {
return _processedNumberOfTests;
}
public function set resultsId(value:String):void {
_resultsId = value;
}
public function get resultsId():String {
return _resultsId;
}
public function set schedulerJob(value:SchedulerJob):void {
_schedulerJob = value;
}
public function get schedulerJob():SchedulerJob {
return _schedulerJob;
}
public function set startTime(value:Date):void {
_startTime = value;
}
public function get startTime():Date {
return _startTime;
}
public function set statusMessage(value:String):void {
_statusMessage = value;
}
public function get statusMessage():String {
return _statusMessage;
}
public function set taskId(value:String):void {
_taskId = value;
}
public function get taskId():String {
return _taskId;
}
public function set totalNumberOfTests(value:int):void {
_totalNumberOfTests = value;
}
public function get totalNumberOfTests():int {
return _totalNumberOfTests;
}
}
}
Both classes are generated by my maven build from a corresponding Java Class and the Types do fit together nicely.

Answer 1

Do you have access to the socket class that's reading in all these messages? Trace out the buffer before the deserialisation and you should at least be able to find the class that's giving you hassle.
Failing that, trace out the object after deserialisation and it should be the very first one after the error is thrown.

Answer 2

This is something you'll have to debug on your own, but I have a gut feeling that the problem is because the data being sent by your java DTO is not the same as your AS3 class, even though that you have the RemoteClass metadata saying that it is.
Are you missing a property? or have a property mismatch? That is the most likely cause of your error. I suggest you debug the java side as much as you can and use something like firebug to see the request/response of the server.