So it is almost February already! Where did January go? I’ve been a bit slow out of the gate this year as far as keeping up a decent pace in posting helpful samples to my blog. Actually, I have been working on things behind the scenes, a few details of which I will reveal now. I have launched a new blog on a new domain. The content is to be all “work” related, so it will be about Flex/Flash Player/Adobe AIR, LiveCycle Data Services/Blaze DS/ColdFusion and other fun technologies. I’ve also been working on an AIR app which I hope to get out at least in a fairly stable beta form around the same time that Flex3/AIR releases. It will most likely be open source and hosted on Google Code. I will also be compiling a library of useful components, extensions to components and monkey patches to the Flex framework. This new blog and content will all be available on:
http://flexmonkeypatches.com
All old posts on http:blog.739SaintLouis.com should link to or redirect to the same content on my new site. I will leave my old site up for an undetermined length of time with the intent of transforming it content-wise into a more personal blog (time permitting.)
Regards,
-Kyle
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This issue came to me from a customer who wanted to catch the timeout of a webservice and then repeatedly re-dispatch the same webservice passing the parameters/data from the original call, but with a larger timeout, until some max timeout or max number of tries was reached.
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This post is to carry on from my previous post regarding moving data from ColdFusion CFCs to Flex 2 Applications Using Webservices.
Here is the first sample showing basic retrieval of a string via Remote Object:
< ?
xml version=
"1.0" encoding=
"utf-8"?>
<mx:application xmlns:mx=
"http://www.adobe.com/2006/mxml" layout=
"vertical" >
<mx:script>
< !
[CDATA
[
import mx.
rpc.
events.
ResultEvent;
import mx.
controls.
Alert;
[Bindable
]
public var sResult:
String;
public function handleStringResult
(event:ResultEvent
):
void{
sResult=event.
result as
String;
}
]]>
</mx:script>
<mx:remoteobject id=
"myService"
destination=
"ColdFusion"
source=
"services.HelloWorld">
<mx:method
name=
"sayHelloString" result=
"handleStringResult(event)" fault=
"Alert.show(event.fault.message)" />
</mx:remoteobject>
<mx:label id="lblStringResult" text="{sResult}"/>
<mx:button label="get String Remote Object" click="myService.sayHelloString()"/>
</mx:application>
This movie requires Flash Player 9
Browse the source of this example.
Download a zipfile containing the source to this sample.
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I am using HostMySite as my web host and have the Linux Builder Plus CF package.
I haven’t upgraded to CF8 since that would require me to change my host package to use Windows. I don’t think I want that, since I like having SSH access to the machine my site is physically on.
I had just finished with my blog regarding Moving data from ColdFusion CFCs to Flex 2 Applications Using Webservices and was trying to get my code working on my site for the follow up article on Moving data from ColdFusion CFCs to Flex 2 Applications Using RemoteObject.
I was not being very successful and had even spoken with HostMySite support and they told me that accessing cfcs from Flex as RemoteObjects through the Flex Gateway with Coldfusion was not enabled and furthermore could not be enabled for a shared hosting account. If I wanted that functionality, I would have to upgrade to a VPS (Virtual Private Server) host package.
Now I pay about $65 per quarter for my host account for CF and WordPress capabilities. The base VPS host package with Coldfusion starts at $116 a month. I don’t know about you, but that is quite a jump for me, so I decided to do a bit more digging around. As it turned out, I found a few forum entries that seemed to allude that it was possible. In fact, one person had even posted to a link in his hosted site where he actually had my dev center article remote object sample working! Unfortunately he didn’t quite say how he had accomplished such a feat.
Well I knew how I would deal with that mystery. I got out my trusty Web Debugging Proxy tool: Charles to sniff the request that the sample was making so I could see what the url was to the flex gateway. As it turns out, I was just missing a trailing slash on my flex2gateway URI!!!!!
The key to getting this to work revolves around 3 things:
1. Getting your config files located and configured properly for compilation.
2. Getting the fully qualified name for your cfc correct.
3. Knowing the endpoint URI for your Flex Gateway fro your Coldfusion server.
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One of my first blog posts pointed to a dev center article that I wrote on this topic for the Flex 2 release. I often send customers to look at this article when appropriate as it is a good starting point for webservice and remoteobject communication between Flex and Coldfusion. I also find myself referring to this sample once in a while and so I have finally decided to host the sample and cfc from my website/blog and potentially enhance the cfc to support more use cases for subsequent blog posts.
< ?
xml version=
"1.0" encoding=
"utf-8"?>
<mx:application xmlns:mx=
"http://www.adobe.com/2006/mxml" layout=
"vertical" >
<mx:script>
< !
[CDATA
[
import mx.
rpc.
events.
ResultEvent;
import mx.
controls.
Alert;
[Bindable
]
public var sResult:
String;
public function handleStringResult
(event:ResultEvent
):
void{
sResult=event.
result as
String;
}
]]>
</mx:script>
<mx:webservice id=
"myService"
useProxy=
"false"
wsdl=
"http://739saintlouis.com/services/HelloWorld.cfc?wsdl"
showBusyCursor=
"true">
<mx:operation
name=
"sayHelloString" result=
"handleStringResult(event)" fault=
"Alert.show(event.fault.message)"/>
</mx:webservice>
<mx:label id=
"lblStringResult" text=
"{sResult}"/>
<mx:
button label=
"get String via Webservice" click=
"myService.sayHelloString.send()"/>
</mx:application>
This movie requires Flash Player 9
Browse the source of this example.
Download a zipfile containing the source to this sample.
Read the rest of this post»
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I wrote this article for the Flex 2.0 release.
It is a good intro on how you can move data between Coldfusion 7.02 CFCs and Flex 2.0 using Web Services or Remote Object calls.
My co-worker, Lin Lin, blogged a good follow up to this article that expands up on the configuration and steps necessary to access cfcs on your Coldfusion server from a flex app on a separate server.
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