Flex and JMS: Portfolio Viewer (Updated for Flex 2 GA)

Posted on June 28, 2006, 11:48 am, by christophe, under Flex.

As you already know, Flex 2 is now available. So, it’s time to post the upgraded version of some of the demos I built during the beta… starting with the portfolio viewer which had generated some good feedback.

portfolio.jpg

The portfolio viewer is an example of a real time market data application. It uses the Flex Data Services to push data to the client. At the server-side, a Java application publishes a data feed to a JMS topic. The Flex client subscribes to that topic and displays the data in a DataGrid and in a Line Chart that are both updated in real time. Read my original post here.

  • Run the application (NOTE: Since my host doesn’t provide JMS hosting, this version simulates data at the client-side). View Source is enabled: right click the application and select View Source to look at the source code.
  • Download the full JMS version of the application (Flex code + Java code). This version requires the Flex Data Services. See the included readme.txt file for deployment instructions. If you just want to demonstrate the concept without installing FDS, run portfolio.mxml. For the full version, run portfoliojms.mxml.

If you tried the application during the beta, make sure you check out this version which includes some nice performance improvements.

UPDATE (1/12/2007): I put together a Tomcat-based Test Drive Server that includes an improved version of this sample running out-of-the box. Read this post for more info. The improved version uses the Java API directly (no JMS), and uses subtopics to allow users to subscribe to the stocks they are interested in.

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97 Comments

  1. Sun Says:

    Hi,
    I am new to flex, this particular sample of yours has created very much interest in flex. My manager wants me look into flex and create proof of concept. We also have a similar application but we display metadata. I just wanted to convert our current application and show it him so that he can find the advantages of flex.

    I was going through your sample, i couldn’t find the flex jms client file. Can you direct me.

    Thank you

    Sun

    June 30th, 2006 at 8:36 am
  2. christophe Says:

    Sun,
    Download portfolio.zip. The JMS client is portfoliojms.mxml in that zip file.
    Christophe

    June 30th, 2006 at 8:51 am
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  4. Amit Says:

    Would Flex Messaging/JMS approach be an overkill for displaying market picture with real time feed? Some of my co-workers think that its better to use a webservice to display real time market picture. I don’t know how is it possible to display real time feeds using webservice (kind of new to this game). Is XMLSocket an option?

    Please advice.

    August 11th, 2006 at 10:42 am
  5. Varun Shetty Says:

    this is a brilliant application.
    i am trying to create something similar hope i get some good pointers from your code.

    thanks a ton

    September 19th, 2006 at 2:39 am
  6. Patrick Garner Says:

    In the example (testdrive) application, when I make a request against it I get an empty Flash screen. I get a similar result when I make a request against the portfolio viewer sample (http://coenraets.org/blog/2006/06/flex-and-jms-portfolio-viewer-updated-for-flex-2-ga). It’s as though I don’t have the correct version of Flash client installed on my workstation. Help! Note that I develop in a Linux environment and therefore am unable to install the latest/greatest version of Flash.

    October 25th, 2006 at 1:09 pm
  7. Jeroen van Vianen Says:

    Nice example, but do you have a working JMS powered version in Tomcat, preferably with ActiveMQ?

    In my own app I am able to connect to a JNDI ActiveMQ JMS broker, send JMS messages to it with a stand-alone Java app, also able to subscribe to the JMS Topic in MXML, but it seems the Topic FDS subscribes to is another one than the one I’m publishing to, so the messages I send server-side will not be shown on the client-side. It seems I’m unable to specify the correct Topic JNDI name. Any clue?

    Thanks,

    Jeroen

    October 30th, 2006 at 7:27 am
  8. Lucas Says:

    I’m new at flex and i’m currently freaking out because I can’t find a way to remove the grid lines from my flex charts. Any help would be welcome:)
    Thanks,
    Lucas

    November 2nd, 2006 at 5:26 pm
  10. yqsong Says:

    Nice example,
    I’m new at flex and i have a new question about this example.
    Hot to send messages from Server-Side Java Code with Subtopic?
    Thank you for reply.

    November 20th, 2006 at 11:48 pm
  11. Pereira Says:

    Hei. I’ve based my self in this example to create a sparkline. I’ve also created a custom renderer (in AS) do add a label into a plotseries, my question is if it’s possible to pass to the renderer class some arguments, that not the datapoint that i’m rendering. In a few words, my questions are:

    1.how can i pass arguments to a renderer class?

    (public class MinValueLabeledRenderer extends UIComponent implements IDataRenderer)

    2.how can i set a renderer using AS code, without the need to use de itemRenderer=”bla.bla.blaRenderer” from MXML?

    Thans for reply.

    November 21st, 2006 at 6:32 am
  13. Grayson Pierce Says:

    Christophe,

    Very nice work!

    Any way of not spiking the CPU quite as much (on my machine it’s at 60% constantly)? other than the obvious of “slow down the data”

    GP

    December 30th, 2006 at 3:08 pm
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    Hi Christophe,
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    Do I have to do anything different from connecting to a Topic to connect to a Queue?

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  68. Crystal Says:

    Hi,
    I’m Crystal. I’m new in Flex and BlazeDS technology. Messaging is quite interesting. I would like to run the example you given. But I need some information from you.
    To run the portfolio, it require a JRun integrated server. Where I can get it??
    Or if I already have JRun in my computer, I have to configure the JMS topic (DashboardFeed) with a JNDI name of jms/topic/flex/dashboard_feed in the jrun-resources.xml right?? Can you give me the details inside the and tags??
    The details have to include inside the existing tag or create a new tag ?

    Looking forward to your help. Thank you and advanced.

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