Re: turbine apps and JFreeChart and Velocity

[David Harris <ha...@ebrinc.com>]

Hello Jürgen and list

Well I got around to your suggestion and I must have done something 
wrong, I got no graph.... here is the Velocity template line I used and
what it expanded to

  <img src="$link.setPage("Graph.vm")"/>

  <img 
src="http://localhost:8080/collabAdvizor/servlet/collabAdvizor/template/Graph.vm"/>


I added some code to create charts inside an existing action's doPerform 
method.
My method was called but I got no graph.  But I did find some indication 
of something inside a 275K file called
c:/tdk-2.3/work/Standalone/localhost/collabAdvizor/SESSION.ser

There were a couple of strings in there that refered to JFreeChart.

I really don't see how I could have a graph when the template line 
expands to what I got..... I know I have more investigating and learning 
to do,  any ideas were I should be looking?


It would be nice if I could write the graph file into a temp location 
that I could construct a URL for.


Dave

Jürgen Hoffmann wrote:
> Hi David,
> 
> this is just a screen class which extends RawScreen as in my example.
> Since I am taking the HttpOutputStream there and wirte to it and close
> it, there is no template which has to be parsed...
> 
> I have commented my source below:
> 
> /* Extend RawScreen, so we can write directly to the Servlets
> OutputStream */
> public class ArchiveImage extends RawScreen
> {
> 
>     /* return the Content type of this page so the browser knows what is
> coming */
>     protected String getContentType(RunData data)
>     {
>         return "image/jpeg";
>     }
> 
>     protected void doOutput(RunData data) throws Exception
>     {
>         /* 
>             Get all the necessary Data to display the screen.
>             The Path to the Image (which is stored on the filesystem
> rather than the db) is stored inside the db
>         */
>         AccountingArchive record =
> AccountingArchivePeer.retrieveByPK(data.getParameters().getInt("id"));
> 
>         /* Now that we have the record open the image and get an
> inputstream for it */
>         FileInputStream in = new FileInputStream(Archiver.IMAGE_PATH +
> "/" + record.getImagePath());
> 
>         /* Create a new ByteBuffer for Reading the Content */
>         byte[] b = new byte[2048];
>         
>         /* Get The OutputStream for this screen */
>         OutputStream out = data.getResponse().getOutputStream();
>         
>         /* While we can read Data into the Buffer print it on the
> OutputStream of the Screen */
>         while (in.read(b) > -1)
>         {
>             out.write(b);
>         }
> 
>         /* Finally Flush the Stream */
>         out.flush();
>     }
> 
> }
> 
> HTH
> 
> Jürgen Hoffmann
> 
> Am Mo, den 17.05.2004 schrieb David Harris um 16:20: 
> 
>>Jürgen,
>>
>>If Image.vm does not exist then what is going in the Velocity template 
>>file that contains the following line?
>>
>><img src="$link.setPage("mrtg,Image.vm")" border="0"/>
>>
>>Jürgen Hoffmann wrote:
>>
>>>Hi,
>>>
>>>exactly. In fact it doesn't even exist.
>>>
>>>Kind regards
>>>
>>>Jürgen Hoffmann
>>>
>>>
>>>-----Ursprüngliche Nachricht-----
>>>Von: Robles, Rogelio [mailto:Rogelio.Robles@experian.com] 
>>>Gesendet: Samstag, 15. Mai 2004 03:58
>>>An: 'Turbine Users List'
>>>Betreff: RE: communication between turbine servlets and JFreeChart
>>>
>>>
>>>And what do you put inside Image.vm?, 
>>>
>>>Should be empty if you just want to force Turbine to load and run your
>>>de.byteaction.modules.screens.mrtg.Image class, right?
>>>
>>>Thanks,
>>>Rogelio
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: Jürgen Hoffmann [mailto:jh@byteaction.de] 
>>>>Sent: Friday, May 14, 2004 1:11 AM
>>>>To: Turbine Users List
>>>>Subject: Re: communication between turbine servlets and JFreeChart
>>>>
>>>
>>>...
>>>
>>>
>>>><img src="$link.setPage("mrtg,Image.vm")" border="0"/>
>>>>
>>>>kind regards 
>>>>


>>>>Jürgen Hoffmann
>>>>
>>>
>>>
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>>
>>
>>
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