Easy example not so easy!

Question

on the grails+flex plugin site:
http://grails.org/Flex+Plugin
it says that integrating flex and grails is SO easy, but i
can't get the simple example to work!
(i'm using MAC OS X)
here is EXACTLY what i've tried:
1-in my workspace, from the terminal window i type: "grails
create-app helloWorld"
2-i then enter the 'helloWorld' folder on the terminal and
type: "grails create-service hello"
3- i then open helloService.groovy in eclipse and copy the
code from the above URL for the helloService, so that the file
looks like this:
class HelloService {
static expose = ['flex-remoting']
def hello() { return "Hello World!" }
4-I then switch to Flex Builder, open a new project, and in
source view, i create a file and copy in the code from the URL, so
it looks like this:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml">
<mx:RemoteObject id="ro" destination="helloService"/>
<mx:Button label="Hello" click="ro.hello()"/>
<mx:TextInput text="{ro.hello.lastResult}"/>
</mx:Application>
5-i then switch back to the terminal window, and type:
"grails run-app hello" in the helloWorld root. It starts up OK,
telling me to browse to "
http://localhost:8080/helloWorld".
6-i then run the Flex app from FB3, but when i click on the
button, i get the following error:
[RPC Fault faultString="[MessagingError message='Destination
'helloService' either does not exist or the destination has no
channels defined (and the application does not define any default
channels.)']" faultCode="InvokeFailed" faultDetail="Couldn't
establish a connection to 'helloService'"]
at mx.rpc::AbstractInvoker/
http://www.adobe.com/2006/flex/mx/internal::invoke()[E:\dev\3.0.x\frameworks\projects\rpc\ src\mx\rpc\AbstractInvoker.as:257
at mx.rpc.remoting.mxml::Operation/
http://www.adobe.com/2006/flex/mx/internal::invoke()[E:\dev\3.0.x\frameworks\projects\rpc\ src\mx\rpc\remoting\mxml\Operation.as:197
at
mx.rpc.remoting::Operation/send()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\rpc\remotin g\Operation.as:113]
at Function/
http://adobe.com/AS3/2006/builtin::apply()
at
mx.rpc.remoting.mxml::Operation/send()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\rpc\re moting\mxml\Operation.as:170]
at Function/
http://adobe.com/AS3/2006/builtin::apply()
at mx.rpc::AbstractService/
http://www.adobe.com/2006/actionscript/flash/proxy::callProperty()[E:\dev\3.0.x\frameworks \projects\rpc\src\mx\rpc\AbstractService.as:285
at
ReportViewer/___ReportViewer_Button1_click()[/Users/PeterAndrus/Documents/Flex
Builder 3/ReportViewer/src/ReportViewer.mxml:4]
anyone know what i might be doing wrong? i am new to this
whole paradigm, but i thought i understood enough to get this done,
but i'm feeling pretty helpless! =) any aid offered is appreciated.
thanks!
ps-i have successfully run other grails services ( i ran one
where i printed to the STDOUT. The result printed to the terminal
window where i'm running grails from.)

Answer 1

I am new to this but I ran into a very similar problem
(probably same), and saw on another posting that you need to
specify the following as compiler options (I did it in Eclipse for
Properties>>Flex Compiler>>Additional Compiler
Arguments, and added the following structure:
-services "C:\...\services-config.xml" -context-root
"C:\...\myapprootdir"
So, fill in your path to services-config.xml and also to your
app root dir. I'm still attempting to see the remote data in my
flex app, but this configuration seemed to remove the destination
issue.