this solution is very easy but has disadvantages. while trying the
listener-method i tried also your method ( and it works, no doubt ). but i
would like to solve this problem "cleanly", like "var result =
rpc.getResult()" ...
the disadvantage is that you must process data inside that callbackfunction.
its much better than processing data inside the handler, thats for sure. but
i want it to be more simple. :)
this is what i got:
var rpc = new qxgui.utils.Rpc;
rpc.callAsync( "doLogin", [ username, userpw ], function( result )
{
alert( result );
});
but i want it this way:
var rpc = new qxgui.utils.Rpc;
rpc.callAsync( "doLogin", [ username, userpw ] );
var result = rpc.getResult();
is there something like pointers or refrences ( for primitive vars ) in js?
i dont know this language very well, i did not even read a book. :)
Noggin182 wrote:
>
> this.__rpc.addListener( "completed", function(e)
> {
> this.__result = e.getData();
> }, this );
>
> alert( this.__result );
>
> Here, you pass the callback function to addListener which then returns
> immediately. Your alert is called before the result is ready.
>
> It is a bit strange to get use to at first, and you will no doubt fight
> the change, but you have to write your code so it works asyncrounously.
>
> Something like this (changed marked ***like this***):
>
> callAsync: function( method, args, ***fHandler***)
> {
> var handler = function( result, exc, id )
> {
> if ( exc == null )
> {
> *** fHandler(result); ***
> }
> else {
> alert( "RPC-Exception: " + exc + " ( ID: " + id + ")" );
> }
> };
>
> this.__rpcRunning = this.__rpc.callAsync( handler, method, args);
> }
>
>
> Then later in your code:
> var rpc = new qxgui.utils.Rpc;
> rpc.callAsync( "doLogin", [ username, userpw ], function(result)
> {
> alert(result);
> });
>
>
>
> sNIk wrote:
>> hello!
>>
>> i would prefer the first option. ;)
>>
>> i changed my code to this:
>>
>> callAsync: function( method, args )
>> {
>> var handler = function( result, exc, id )
>> {
>> if ( exc == null )
>> {
>> //alert( result );
>> }
>> else {
>> alert( "RPC-Exception: " + exc + " ( ID: " + id + ")"
>> );
>> }
>> };
>>
>> this.__rpcRunning = this.__rpc.callAsync( handler, method,
>> args
>> );
>>
>> this.__rpc.addListener( "completed", function(e)
>> {
>> this.__result = e.getData();
>> }, this );
>>
>> alert( this.__result );
>> }
>>
>> but i get "null" as value .. whats wrong? :)
>>
>>
>> Noggin182 wrote:
>>> Hi Again,
>>> The call to the backend is asyncrounous, your
>>> qxgui.utils.Rpc.callAsync() function will return immediately.
>>>
>>> There are two ways forward, you can either change your class so it fires
>>> an "complete" event, or change the function so it accepts a callback.
>>>
>>> From the callAsync() function it looks like you are expierenced enough
>>> to do either without help.
>>>
>>> The two choices would make your calling code look like this:
>>>
>>> Option 1.)
>>>
>>> var rpc = new qxgui.utils.Rpc;
>>> rpc.callAsync( "doLogin", [ username, userpw ] );
>>> rpc.addListener("complete", function(e)
>>> {
>>> var result = e.getData();
>>> });
>>>
>>> Option 2.)
>>>
>>> var rpc = new qxgui.utils.Rpc;
>>> rpc.callAsync( "doLogin", [ username, userpw ], function(result)
>>> {
>>> alert(result);
>>> });
>>>
>>>
>>> If you need more help, just decide first which one best meets your
>>> requirements and let us know :)
>>>
>>> HTH,
>>> Matt
>>>
>>>
>>> sNIk wrote:
>>>> hello there. i want to simplify the usage of rpc and ran into a problem
>>>> with
>>>> the handler. example:
>>>>
>>>> usage:
>>>> -------------------------------------------------------------------------------------
>>>>
>>>> var rpc = new qxgui.utils.Rpc;
>>>> rpc.callAsync( "doLogin", [ username, userpw ] );
>>>> var result = rpc.getResult();
>>>>
>>>>
>>>> class:
>>>> -------------------------------------------------------------------------------------
>>>>
>>>> qx.Class.define("qxgui.utils.Rpc",
>>>> {
>>>> extend: qx.core.Object,
>>>>
>>>> construct: function( url, service )
>>>> {
>>>> // standard-paramenter
>>>> some statements ...
>>>>
>>>> // konfigurieren
>>>> rpc = new qx.io.remote.Rpc( url, service );
>>>>
>>>> rpc.setTimeout( this.__timeout );
>>>> rpc.setCrossDomain( this.__crossDomain );
>>>>
>>>> this.__rpc = rpc;
>>>> },
>>>>
>>>> members:
>>>> {
>>>> // eigenschaften
>>>>
>>>> ////////////////////////////////////////////////////////////////////////
>>>>
>>>> __url: "xxx",
>>>> __service: "xxx",
>>>> __timeout: 5000,
>>>> __crossDomain: true,
>>>>
>>>> __rpc: null,
>>>> __id: null,
>>>> __exc: null,
>>>> __result: null,
>>>> __rpcRunning: null,
>>>>
>>>>
>>>> // methoden
>>>>
>>>> ////////////////////////////////////////////////////////////////////////
>>>>
>>>> callAsync: function( method, args )
>>>> {
>>>> var handler = function( result, exc, id )
>>>> {
>>>> if ( exc == null )
>>>> {
>>>> this.__result = result;
>>>> }
>>>> else {
>>>> alert( "RPC-Exception: " + exc );
>>>> }
>>>> };
>>>>
>>>> this.__rpcRunning = this.__rpc.callAsync( handler, method,
>>>> args
>>>> );
>>>> },
>>>>
>>>> isRpcRunning: function()
>>>> {
>>>> return this.__rpcRunning;
>>>> },
>>>>
>>>> getResult: function()
>>>> {
>>>> return this.__result;
>>>> }
>>>> }
>>>> });
>>>>
>>>>
>>>> how do i get the result into the right scope?
>>>
>>> ------------------------------------------------------------------------------
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>>
>
>
> ------------------------------------------------------------------------------
> The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your
> production scanning environment may not be a perfect world - but thanks to
> Kodak, there's a perfect scanner to get the job done! With the NEW KODAK
> i700
> Series Scanner you'll get full speed at 300 dpi even with all image
> processing features enabled. http://p.sf.net/sfu/kodak-com
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