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From cmoulliard <cmoulli...@gmail.com>
Subject Re: Where the Message object (javascript) of amq.js is defined ?
Date Wed, 22 Oct 2008 08:49:21 GMT

Hi,

Additional question : What is the javascript class of the message returned
(DOM, XMLHTTPResuest, ....) ?

The existing doc does not help us because in the two example, we saw that we
can use message.getAttribute or message.getChildNodes[0], ... ?

KR,

Charles Moulliard


cmoulliard wrote:
> 
> Hi,
> 
> I would like to know where the javascript object Message used by
> AJAX/ActiveMq in a HTML page is defined ? I see in the portfolio example
> that we can use the following method "message.getAttribute('stock')" to
> access part of the xml message returned by the queue engine through the
> MessageListenerServlet but I would like to know what are the methods /
> variables available for this message object (which is normally a mirror of
> the jax.jms.Message object) ?
> 
> To be more precise, here is a copy/paste of the portfolio.js script of the
> example where message appears at the line _price: function(message)
> 
> var priceHandler = {
>   _price: function(message) {
>     if (message != null) {
>       var price = parseFloat(message.getAttribute('bid'))
>       var symbol = message.getAttribute('stock')
>       var movement = message.getAttribute('movement')
>       if (movement == null) {
> 	        movement = 'up'
>       }
> 	    
>       var row = document.getElementById(symbol)
>       if (row) {
> 		    // perform portfolio calculations
> 		    var value = asFloat(find(row, 'amount')) * price
> 		    var pl = value - asFloat(find(row, 'cost'))
> 		    
> 		    // now lets update the HTML DOM
> 		    find(row, 'price').innerHTML = fixedDigits(price, 2)
> 		    find(row, 'value').innerHTML = fixedDigits(value, 2)
> 		    find(row, 'pl').innerHTML    = fixedDigits(pl, 2)
> 		    find(row, 'price').className = movement
> 		    find(row, 'pl').className    = pl >= 0 ? 'up' : 'down'
>       }
>     }
>   }
> };
> 
> function portfolioPoll(first)
> {
>    if (first)
>    {
>      amq.addListener('stocks','topic://STOCKS.*',priceHandler._price);
>    }
> }
> 
> amq.addPollHandler(portfolioPoll);
> 
> Remark : addtiaional question
> - Who will cal the function portfolioPoll(first) function ?
> - How is the parameter first which is a boolean setted ?
> 
> KR,
> 
> Charles Moulliard
> 


-----
Enterprise Architect

Xpectis
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L-1470 Luxembourg

Phone +352 25 10 70 470
Mobile +352 621 45 36 22

e-mail : cmoulliard@xpectis.com
web site :  www.xpectis.com www.xpectis.com 
My Blog :  http://cmoulliard.blogspot.com/ http://cmoulliard.blogspot.com/  
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