Flex 2.0 reliability in a stressed environment

Greetings,
I am totally new to Flex 2.0 but am really amazed by the
possibilities it offers for developpers but I wonder about its
stability, or reliability, under heavy load.
I recently had to start looking for Flex 2.0 for a POS
(point-of-sale) application. Basically there would be a ColdFusion
MX7 back-end, there would also be FDS (Flex Data Service) to manage
the messaging between the Flex App installed locally on the user
desktop. I am using FDS because on certain occasions I need to push
data from the server to the desktop app and I do not want to have a
timer looking each n seconds on the server for updates. To further
increase performance I might very well end-up either: loading the
entire product catalog into the server RAM or simply have the
desktop app load an XML catalog on startup and use it as long the
server didn't send the refreshCatalog() function... sort of. Some
tests will need to be done.
In any cases, my question is whether or not Flex 2.0 can be
fast enough to sustain an hurry employee that punch in items real
quick. This app will be interfaced with a touch-screen so no mouse
and no keyboard will be required for regular operations... à
la Palm OS, there will be a QWERTY keyboard and a calculator that
may overlap at the bottom of the screen but basically the order
entry will be a "fast and furious" button clicking session. Think
about a waiter in a sport bar punching his order on its
touch-screen during the Superbowl ;) ... you see how fast that can
go?
Would Flex 2.0 be able to keep the pace, or should I start
looking for a .Net desktop app?

Hi Laurent,
Thanks for your answer.
I have just Failover Cluster.
Do you first install Oracle on each server and then install HACMP or install HACMP and then Oracle ?
I cannot ignore messages because I have :
PRDWSS2 Available
PRDWSS3 Unreachable
Button "install" is unavailable ...
Do you know if i can force "Universal Installer" to only run on available node ?
It's very difficult to find ressources on HACMP/AIX 5.2 with Oracle 9i.
Guillaume

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Regards
Mukesh Negi
http://weblogicserveradministration.blogspot.com

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Howdy, I upgraded my mac yesterday to 10.7, and have run into an interesting problem.
I was using Flex Builder 3 before, using Flex SDK 3.2. After upgrading, I found that Flex Builder 3 is not compatible with Lion anymore, so I had to upgrade to Flash Builder 4.5.
This is fine, I just figured I would add the Flex 3.2 sdk, which I did. However, after adding my project to the workbench for Flash Builder 4.5, I see the following error:
http://cl.ly/3J3W0E22402G2I1L2U1Q
However, as far as I can tell, the following two screenshots mean I have installed the Flex 3.2 sdk:
http://cl.ly/1S0l1m2u1Z0z053Y3U29
http://cl.ly/3c3k2B161K1d1y2H332P
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I can't help you with your problem, but maybe this is a good start:
http://kb2.adobe.com/cps/905/cpsid_90508.html#main_Flash_Builder
..... About that... have you encountered any other issue when using FB 4.5.1 with OS X 10.7.0?

CF8 install to work with Flex 3

...well Flex 3 or other flash remoting...
I've been doing CF coding for a while now. A year or so ago I
tried to do some flash remoting but could never get the flash to
talk to CF. I could get the CF to provide XML to the flash
component but I could never talk to the CFC's directly. I ended up
scrapping the flash and finished the coding in CFML.
Now, I've got a little spare time and I thought I'd learn
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I've dug over the past two weeks looking for anything that
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I've tried coldfusion on linux and win2k3 with the same
results. I actually has less luck with flex builder with coldfusion
running on linux.
What am I missing to allow connection to CF from a flash/flex
component?

Hi,
From your Flex application, you want to use the RemoteObject
MXML tag (<mx:RemoteObject />). As long as Flash Remoting is
available in the CFAdmin, which you indicated it is, it should
work. I've done/do this running CF8 on Mac OS X, Linux, and Win
2003.
Here's a sample of MXML code for this.
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute" creationComplete="init()">
<mx:Script>
<![CDATA[
import mx.rpc.events.FaultEvent;
import mx.collections.ArrayCollection;
import mx.rpc.events.ResultEvent;
import mx.controls.Alert;
[Bindable]
private var myAC:ArrayCollection;
//runs on creationComplete event of mx:Application tag
private function init():void{
this.ro.getAll();// call the method on your CFC when app
inits
private function gotEm(event:ResultEvent):void{
myAC = new ArrayCollection();
myAC.source = event.result as Array;
private function oops(event:FaultEvent):void{
Alert.show(event.fault.toString());
]]>
</mx:Script>
// the remote object, which connects to CF via FlashRemoting
<mx:RemoteObject id="ro" destination="ColdFusion"
source="webroot.appfolder.cfcfolder.cfcname">
<mx:method name="getAll" fault="oops(event)"
result="getEm(event)" />
</mx:RemoteObject>
// DataGrid to hold results..naturally you would make this
nicer :)
<mx:DataGrid id="dg" dataProvider="{myAC}"/>
</mx:Application>
Have you tried similar code? It's often helpful to see some
code you're having trouble with, if that's possible.
Hope this helps!
Craig

SpaceX seeking full-time LabVIEW programmer to join Texas team!

Please email [email protected] for more info. General Description below...
The Company
SpaceX is a US based space technology company founded by its residing CEO and CTO, Elon Musk, the former co-founder of PayPal. The company's goal is to renew a sense of excellence in the space industry by disrupting the current paradigm of complacency and replacing it with innovation and commercialized price points; laying the foundation for a truly space-faring human civilization.
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All SpaceX engineers work in a fast-paced environment, supporting a variety of propulsion testing programs and structural test stands. Specific responsibilities associated with this job include:
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Full life cycle software development
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Requirements
Education & Experience Requirements:
Bachelor’s Degree in Engineering required
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SpaceX is an Equal Opportunity Employer; employment with SpaceX is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, marital status, mental or physical disability or any other legally protected status.
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Still waiting for the Venice, CA team, just kidding.
LabVIEW Champion . Do more with less code and in less time .

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Hello,
My Mobile details.
Phone: I phone 4S - 8GB
OS: IOS 8 Updated on 20th Sep 14
After updating below problems.
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Con Call is difficult to make
2. While trying to make call, It takes almost 1 second to go to call screen after tap on number.
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In IOS 7 it use to come up.
it feels irritated due to above glitch.

I tried all of the suggested solutions mentioned in this thread, and finally did a full reset according to Apple's instructions, step by step (as an engineer and 40 year computer user I am good at that stuff).
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IPad 2 is still running slow and choppy.
Some Apps do not even load.
Website pages will not load and result in error messages. One particularly annoying Safari error on loading a new web page is: "a problem occurred with this webpage so it was reloaded".
MY iPad 2 worked perfectly for the last couple of years through several updates that performed seamlessly, but this one and the two most recent corrected updates have rendered my iPad so degraded that I don't think I will be using it much anymore. I originally bought the tablet because of it's smooth GUI and fast performance, the reliability and error free environment, and Apple's proven record for effective updates. That's all gone now.

After iOS 8 update, the mail app crashes on iPhone 4S

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How do I set up an emulator for testing my application?

I'm starting to wade into GPIB and cannot seem to find the best way to continue given all the components (not meaning ActiveX) required to assemble a semi-reliable development and testing environment for beta rollouts.
I have set up my design environment. Now I need a way to emulate some of the equipment I will be developing for so that I may test my apps before final testing on the actual equipment (which I obviously have no access to at this point).
Given that.. am I correct in understanding that LabView or IVI allows this type of functionality? If so, here are my specific questions regarding development:
1) Do I currently need any hardware or can the GPIB device list be populated from IVI/LabView emula
tors? In other words... how do I make the 'link' between these two technologies?
2) Can IVI/LabView run on the same machine as my test application, or is a secondary machine required?
3) Is there a general punch list of software (LabView, etc.) I might need in order to get this going?
4) Any general (or specific) overviews that may help me get over this hump would be greatly appreciated.
Charles

Whether or not you are able to simulate your hardware will depend on what method you are using to program it. If you are programming the instrumentation directly using the GPIB ActiveX control or GPIB calls directly you will not have the ability to do simulate in software. If you are using an instrument driver, however, you will be able to do simulation if the instrument driver is IVI compliant.
Assuming that you are using an IVI-compliant instrument driver, here are the answers to your questions:
1. You do not need any hardware whatsoever. You can either specify to use simulation in your code by using the InitWithOptions functionality and specifying "SIMULATE=TRUE" in the option string parameter. You can also set things up externally so that you can alter simulation strictly through the IVI configuration so that your code doesn't have to change.
2. It will run on the same machine as your code. As far as your application is concerned, it will not appear any differently however no GPIB communication will occur.
3. IVI compliant instrument drivers for all of the GPIB hardware you are using. These are available for download from ni.com.
4. I think that there may be some IVI-related application notes.
Assuming that you are not using an IVI-compliant instrument driver and instead are either using a non-IVI instrument driver or making GPIB calls directly, things can get a little more elaborate. If you want full emulation capability you'll need to write another piece of software that emulates your device. This can be done in LabVIEW or any other ADE of your choice. What you'll need is a second GPIB card (to act as your device) that you'll cable to from your main computer. That card can live in a second machine or in the same one as your main application. You may want to put it in a separate test machine just to keep things a little cleaner.
If you go with this approach, it's not too difficult to write an emulator for a single device (or at least that functionality of a device that you use) per GPIB card. It will be more difficult to write an emulator that emulates multiple devices using a single GPIB card. In other words, you may want to use a separate GPIB card for each instrument you want to emulate. I wrote such an emulator some time ago but can't seem to find it. In any case, it's probably only a couple of days effort.
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Jason

Post processing PDF to XML.

Topic
Post-processing PDF into XML.
Compton MacKenzie - 08:48am Oct 29, 2008 Pacific
Hi,
Sorry for the basic question... We want to have users fill out a fillable PDF form using Aacrobat Reader and then upload it to a web page. Once we get the PDF, we need to extract the data that they have entered. Short of using LiveCycle Data Services (not currently feasible as we have no Java presence on our server platform), is there any API that I can use to extract the data or convert the PDF to XML. I understand that it is possible to export XML using the Acrobat client (and it might be possible to script this with COM) but I don't think this would work reliably in a server environment.
(We need both the PDF and the data as the PDF will contain an electronically captured image of a customer's signature and need to preserve the actual image of the document.)
Any suggestions?
Thanks!

There are server based products under the LiveCycle banner for this but they all run on a Java based app server. You can use a turn key install where the app server (JBoss) and a Database (MySql) are provided for you but you need to have the Java SDK present. The LiveCycle servers can run on Windows, Linux, AIX to name a few.
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Memory leak on SunOne Web Server 6.1 on application reload

Hi!
I am pretty sure that i have found a memory management problem in
SunOne Web Server 6.1 .
It started with an OutOfMemory error we got under heavy load . After
some profiling with Jprofiler i didn't find any memory leaks in the
application.Even under heavy load (generated by myself) i can't find
anything ,more, i can't reproduce the error! The memory usage is
about 20Mb and does not go up .
However it is pretty simple to see the following behavior:
[1] Restart the server (to have a clear picture) and wait a little for
memory usage to stabilize.
[2] In the application dir. touch .reload or one of the classes:
The memory usage goes up by another 50Mb (huge amount of mem. taking
into account the fact that it used only 20Mb under any load befor).
Do this another time and another 20Mb gone etc..
The JProfiler marks the memory used by classes . And it can be
clearly seen the GC can't release most of it.
I AM sure this is not the application that takes all the memory.
Another hint : after making the server to reload application i can see
that the number of threads ON EVERY RELOAD is going up by ~10-20
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My system:
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Evgeny

my guess is that - because of '.reload' , web container tries to
recompile all the classes that you use within your web application and
hence the memory growth is spiking up.What do you mean by "tries to recompile"?The classes in
Web-inf are already compiled! And i have only ~5 jsp's .
(the most part of the applic. is a complicated business logic)
If you are talking about reloading them ,yes,that's the purpose of .reload,
isn't it? :).But it seems that container uses the memory for it's own
classes: the usage of memory for my classes don't really grow
that much (if at all) after reload (according to profiler)
Also the real problem is that the memory usage grows to much for
too long (neither seen it going down) and thus ends with OutOfMemory.
if you are seeing the memory growth to be flat in stress environment,
then I am not sure that why do you think that there is a memory leak ?There is no memory leak in stress environment.
There is memory leak while reloading the application.
It is a memory hog for sure (~20-30Mb for every reload).
Memory leak?It seems that way because i can't see memory usage go
down and after a lot of reloads OutOfMemory is thrown.
also, what is jvm heap that you use ? did you try jvm tune options like -
XX:+AggressiveHeap ?256Mb.I can set it bigger ,but how do i know that it will not just delay
the problem ?
Thanks for response.
Evgeny

Embedding Swf into to forum signature

Hi, i have been trying to find this everywhere but no good.
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o i change settings etc.....is there some mod that should be
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No. I mean that the Flex framework makes certain assumptions about the environment it is running in -- like having a stage to work with. The Alert function, for example, works by creating a sprite and adding it to the Flash display list. Since your embedded SWF is not on a stage, there's no way for it to work.
You can can possibly use certain non-visual parts of the framework, such as the rpc package, but I can't guarantee it.

Embedding swf into HTML+JS AIR app

Hi
I'm trying to embed swf into HTML+JS AIR app with no luck.
First, I created flash library with this class in default package.
package
     import mx.controls.Alert;
     public class Utilities
          public function Utilities()
                         //asdfasdf
               Alert.show("asdasd","");
Then I compiled the project with Flash Builder and got library.swc as result. Then I extracted swf file.
After this is added required code into my html:
<html>
<head>
    <script type="text/javascript" src="AIRAliases.js"></script>
    <script type="text/javascript" src="AIRIntrospector.js"></script>
    <script type="text/javascript" src="jquery-1.6.2.js"></script>
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</head>
<body>
</body>
</html>
Then after I run application, I get error that result of expression is not constructor, function etc.
Could you help me please? Thanks in advance.
Here is sample code:
http://depositfiles.com/files/jztpnlb3a

No. I mean that the Flex framework makes certain assumptions about the environment it is running in -- like having a stage to work with. The Alert function, for example, works by creating a sprite and adding it to the Flash display list. Since your embedded SWF is not on a stage, there's no way for it to work.
You can can possibly use certain non-visual parts of the framework, such as the rpc package, but I can't guarantee it.

Need help with getStyleDeclaration

Hi,
I'm trying to move my Flex 3 project to new Flash Builder environ. I've a class named "CanvasButtonAccordionHeader" which is extended from an mx:Button instance.
There was a code as:
var selector:CSSStyleDeclaration = StyleManager.getStyleDeclaration( "CanvasButtonAccordionHeader" );;
Though the Flash Builder compiler giving me the warning that "getStyleDeclaration' has been deprecated since 4.0. Please use 'IStyleManager2.getStyleDeclaration on a style manager instance".
When I'm trying to change the line as:
IStyleManager2.getStyleDeclarations( "CanvasButtonAccordionHeader" );
It returns me error since the line of code returns me an Array in place of CSSStyleDeclaration type, which is my requirement.
Then I tried:
var selector:CSSStyleDeclaration = IStyleManager2.getMergedStyleDeclaration( "CanvasButtonAccordionHeader" );
I'm getting obvious error since I'm trying to call a method from an Static type of class (interface). I'm in turn very confused now how to overcome this problem. Though as a note, when I'm try calling "styleManager.getStyleDeclaration('someName')" from an mx type of component, it works fine!
How do I fix this in a class environment then!
Please suggest.
Thanks.
ASB.

I've encountered the same problem.
The solution is here:
http://www.jonathanrowny.com/journal/migrating-flex-4-stylemanager
or
http://www.flashcomguru.com/index.cfm/2010/7/16/getStyleDeclaration-to-IStyleManager2-flex
These two are essentially the same.
Don't forget to first
import mx.core.FlexGlobals;

Flex 2.0 reliability in a stressed environment

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