[flexcoders] Re: FDS mashup. Talking to multiple FDS servers in a single Flex application
Excellent!
I think I would still need some serve side configuration because it
would probably be a mistake to hard code server URLs in the client
code, but that is a relatively simple task.
I am toying with sending the services-config.xml file to the client
and parsing it there. Otherwise I am going to have to invent a
notation for defining the services.
Have you done anything along these lines?
--- In flexcoders@yahoogroups.com, neale_patton [EMAIL PROTECTED]
wrote:
We do this successfully in our applications.
We have a 'shell' Flex app which loads multiple Modules -- each of
these modules will talk to a different server-side application. Its
not without its subleties but as Pete says creating/setting the
channelSet manually is key to ensure consistent behaviour.
Cheers,
Neale.
--- In flexcoders@yahoogroups.com, Peter Farland pfarland@ wrote:
Create multiple mx:RemoteObject instances and just programmatically
set a ChannelSet on each one.
mx:RemoteObject id=remoteObject1 destination=destination1 /
...
mx:Script
import mx.messaging.ChannelSet;
import mx.messaging.Channel;
import mx.messaging.channels.AMFChannel;
import mx.messaging.channels.SecureAMFChannel;
...
private function init():void
{
var channelSet1:ChannelSet = new ChannelSet();
var channel1:Channel = new AMFChannel(null,
http://server1/context/messagebroker/amf;);
channelSet1.addChannel(channel1);
remoteObject1.channelSet = channelSet1;
}
...
Assuming that you're only using RPC services like RemoteObject,
then you
don't need to compile against a services-config.xml file and can just
programmatically create your channels yourself.
This approach comes in handy for lots of scenarios - poor man's load
balancing by randomly assigning a server on SWF initialization, etc.
etc.
Pete
-Original Message-
From: flexcoders@yahoogroups.com
[mailto:[EMAIL PROTECTED] On
Behalf Of simonjpalmer
Sent: Thursday, August 23, 2007 8:59 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] FDS mashup. Talking to multiple FDS servers in a
single Flex application
I want to use FDS/AMF to transfer data to and from my client, but
talking to several different servers. I have one server for routine
persistence and data retrieval, a pojo server, but I have a second one
for generation of formatted output, a doc server.
I want to report from the client state of the data, not the server
state, and I want to distribute my procesing so that I can scale
up the
architecture - doc generation can be expensive.
What I would like to be able to do is use the same data transport
(i.e.
AMF and my object model) for both the pojo server and the doc server.
They come together in the single Flex app.
Does anyone know if Flex supports this and if so how? I seem only
to be
able to configure an app for a single destination.
OK, perhaps mashup is a bit of a stretch, but it is the same
principle.
I am pretty sure I could do this if I used http, but I don't want
to use
http, I am very happy with amf.
Thanks
Simon
--
Flexcoders Mailing List
FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt
Search Archives:
http://www.mail-archive.com/flexcoders%40yahoogroups.com
Yahoo! Groups Links
Re: [flexcoders] flex uploading to amazon s3
Thanks On Aug 24, 2007, at 6:58 PM, Peter Connolly wrote: Should have included a link: http://tinyurl.com/2lsry7
[flexcoders] first remoteObject - basic CRUD and nothing fancy
I get the database part, I get HTTPServices (enough to botch my way through it thanks to Tracy), but for a blog I'm trying to build (a very simple blog!) I don't think HTTPService is the answer. I think I need to use CF Remoting. There are examples all over the place, some very simple (read a query into a DG), some very complex (I'm trying to unravel mytodolist), but nothing I'm finding really does just a basic CRUD. They all include the things you'd hope to see, i.e., validation, checking IDs, performing various methods, etc. and it's convoluting the learning process for me. For example, enter data into say 3 textfields (let's say ID, title, content fields in SQL/Access), commit these textfields via 3 buttons (functions as the create of the CRUD), and read that back into a DataGrid, for which: columns 1-3 allow you to click on the field in a particular row and change the field (rename a title for example right in the datagrid), i.e., functions as the read/update of the CRUD. Hitting enter commits the change to the db. column 4: a button in an itemrenderer coded to delete the entry altogether - functions as the delete of the CRUD. Useless in the real world, but it will help me to understand Remoting with Flex/CF. Would someone be willing to help guide me through that? I just want to see the very core stuff so I can at least get to the point where I can begin actually using RemoteObject/CF/Flex integration, and obviously I'll have to build on the complexity from there. The first steps are always the hardest...and I practically had an aneurysm trying to get HTTPServices working... p.s. I'm about to move my Flex to my new development box, after using my crapper for the last few months - will I have licencing issues? It's only going to be on the new development box. The crapper won't have Flex anymore...I only have the single license CD. Shawn
[flexcoders] Re: first remoteObject - basic CRUD and nothing fancy
By 'textfields' I mean TextArea of course...sorry about that. Shawn
Re: [flexcoders] flex uploading to amazon s3
Argh. Does that mean only Apollo would be able to upload to s3? On Aug 24, 2007, at 6:58 PM, Peter Connolly wrote: Should have included a link: http://tinyurl.com/2lsry7 Sorry, pc On 8/24/07, Peter Connolly [EMAIL PROTECTED] wrote: Take a look at the Salsa application. On 8/24/07, grimmwerks [EMAIL PROTECTED] wrote: Has anyone attempted this before?
[flexcoders] ARGH rubyamf in debug vs non-debug
For some reason any remote objects that I call get a 'send failed' when I'm in regular (non-debug) mode; but when I'm in debug mode, they're returning perfectly. What is the difference in the compilation? What's NOT getting compiled in the non-debug mode? This is driving me crazy.
RE: [flexcoders] Re: Loading external assets at runtime for component skinning
I don't have any example handy. Someone else might, but I wouldn't be suprised if nobody does because the application startup performance impact of using externall images as skins is significant. I encourage you to pursue runtime CSS embedded assets. From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of walsaadie Sent: Friday, August 24, 2007 2:34 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Re: Loading external assets at runtime for component skinning Thanks for your reply. any chance of an example on how to use the image subclass as a skin. i can't find it documented anywhere. Thanks --- In flexcoders@yahoogroups.com mailto:flexcoders%40yahoogroups.com , Alex Harui [EMAIL PROTECTED] wrote: Skins are embedded assets. You can choose them dynamically by selecting different CSS-based SWFs, but due to the sheer overhead of external loading, we don't put in code that by default. You can create a custom class that subclasses mx:Image and use that as a skin. From: flexcoders@yahoogroups.com mailto:flexcoders%40yahoogroups.com [mailto:flexcoders@yahoogroups.com mailto:flexcoders%40yahoogroups.com ] On Behalf Of walsaadie Sent: Friday, August 24, 2007 10:01 AM To: flexcoders@yahoogroups.com mailto:flexcoders%40yahoogroups.com Subject: [flexcoders] Loading external assets at runtime for component skinning Not sure if this can be done without overriding the framework. I'm experimenting with deferent ways to skin components. My question, is it possible to somehow pass a url to an external graphic to be loaded and used as a skin for a component? For example take the button component. If i pass a url through xml or some other method, would it be possible to load the graphic at runtime to be used as a skin?. I've explored various methods using css sheets and binding images programmatically. Using the style manager to load and unload various style classes to achieve the objective But all require the graphic to be embedded before the swf is compiled. I'm not sure if I'm missing something. Like creating a stylesheet at runtime and loading the graphics from that point. I currently hit a brick wall. I'd appreciate it if you folks can point me to the right direction.
Re: [flexcoders] Flex + SOAP + AXIS support?
The Flex Developer's Guide (p. 1401) states that WSDL 1.1 is supported and, by implication, SOAP 1.1 support is a requirement of WSDL 1.1http://www.w3.org/TR/wsdl . On 8/24/07, bobsandywalls [EMAIL PROTECTED] wrote: I know that Flex supports SOAP, however what version of SOAP does it support and by proxy what version of AXIS is capable of providing? I looked online for such a requirements list, but could not find it. Thanks for the assistance
RE: [flexcoders] Re: Overriding getters/setters getting compile error
I'm still getting my head around the whole
'public get/set variableName():blah' construct
It's the reason that Flash and Flex APIs can be property-centric instead
of method-centric. You can make lots of things happen simply by
assigning new values to properties, because the setter method can have
all kinds of interesting side effects. In Flex, the typical thing that
happens is that the setter of a property (at least on visual components)
calls various invalidation methods which cause the component to undergo
relayout via the LayoutManager. Setters also generally dispatch various
(undocumented) event to cause binding expressions to re-evaluate.
- Gordon
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Peter Connolly
Sent: Friday, August 24, 2007 3:46 PM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] Re: Overriding getters/setters getting compile
error
That makes sense. I'm still getting my head around the whole 'public
get/set variableName():blah' construct, which doesn't exist in
Java-land.
pc
On 8/24/07, Doug Lowder [EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] wrote:
Please pardon my jumping in here, but I think it may just be
more a
case of duplicate names than scoping issues. The compiler
identifies
a getter function by its name, and the same with a variable. If
you
have both a getter and a variable named widget, how would the
compiler be able to tell them apart and know when you wanted
just the
variable as opposed to executing the getter function? Prefixing
the _ to the variable name is typical convention for mking the
variable and getter/setter distinguishable from each other
(e.g., _widget is the variable, widget is the
getter/setter).
Doug
--- In flexcoders@yahoogroups.com
mailto:flexcoders%40yahoogroups.com , Peter Connolly
[EMAIL PROTECTED]
wrote:
Thanks Tony, although I must admit that I don't understand why
this
now
works. Why can't the variable and the getter/setter methods be
in
the same
scope? I don't remember reading anything about that kind of
restriction...
On 8/23/07, Tony Alves [EMAIL PROTECTED] wrote:
Your private variable and getter/setter are in the same
scope.
try:
private var _widget:String;
override public function get widget():String {
return _widget;
}
override public function set widget(value:String):void {
_widget = value;
}
Peter Connolly wrote:
I get the following compiler errors:
1021: Duplicate function definition Base.as
http://Base.as http://Base.as
line 11
1021: Duplicate function definition Base.as
http://Base.as http://Base.as
line 14
1023: Incompatible override Base.as http://Base.as
http://Base.as
line 11
1023: Incompatible override Base.as http://Base.as
http://Base.as
line 14
If my parent class is:
package
{
public class Base
{
private var widget:String;
public function Base(value:String = base-level widget) {
trace('Base.as http://Base.as http://Base.as ' -
value of widget is:
+ this.widget);
}
public function get widget():String {
return this.widget;
}
public function set widget(value:String):void {
this.widget = value;
}
}
}
and the class with overriden getters/setters is:
package
{
public class OverridenClass extends Base
{
public function OverridenClass(value:String = overriden
widget value) {
super(value);
trace(value of widget is: + widget);
}
override public function get widget():String {
return widget;
}
override public function set widget(value:String):void {
this.widget = value;
}
}
}
The lines that are highlighted are the ones marked as
errors by
the
compiler under Hotfix3, Flex 2.0.1.
I thought I was following the examples shown on p.
135 Overriding
getters and setters in the Programming ActionScript 3.0
manual.
Can anyone point out to me why this is not working?
__._,_
RE: [flexcoders] Getter and Setter Ramifications...
I'm wondering what the caveats are of using getters this way. My only caveat would be that we consider it best practice for getters to be lightweight. If you do a lot of computation in a getter, other people using your getter may not realize that it is slow, and they might call it too frequently, say in a loop. People's expectation is that properties are fast while methods are slower. So if we have a heavyweight method that computes something at returns it, we make it a method instead. - Gordon From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of bithroop Sent: Friday, August 24, 2007 3:28 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Getter and Setter Ramifications... I have been using getters and setters in places where I don't necessarily have a private member variable that I'm affecting, but instead am doing one of the following: - using a getter to run a function that collects implicit data. Like for instance, I might step through a list and return all members that have a field set to TRUE. So instead of keeping a private var of this, I just return the result. - using a getter to do the same but just so I can see what the contents are in the debugger. I'm wondering what the caveats are of using getters this way. Anyone?
[flexcoders] Problem detecting data change in a List
Hi! I have a List bound to an ArrayCollection. And this List is draggable, so you can re-arrange the items. You can also remove or add stuff to it. I would like to do something when the List is modified, but 'dataChange' doesn't seem to work. Anyone has any idea? 'change' is not what I want since it only detects changes to selectedItem/selectedIndex. I've thought about putting an event listener on the ArrayCollection itself, but the problem is the ArrayCollection can be null under some circumstances. Any help appreciated!
RE: [flexcoders] Problem detecting data change in a List
I think you want to listen to collectionChange on the ArrayColleciton itself, and arrange for it to be empty instead of null. But if you really must know when the dataProvider property becomes null, I think you'll need to subclass List and override the dataProvider setter. - Gordon From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of williamkusumo Sent: Friday, August 24, 2007 9:20 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Problem detecting data change in a List Hi! I have a List bound to an ArrayCollection. And this List is draggable, so you can re-arrange the items. You can also remove or add stuff to it. I would like to do something when the List is modified, but 'dataChange' doesn't seem to work. Anyone has any idea? 'change' is not what I want since it only detects changes to selectedItem/selectedIndex. I've thought about putting an event listener on the ArrayCollection itself, but the problem is the ArrayCollection can be null under some circumstances. Any help appreciated!
