Re: running batik efficiently in a web server environment (linux)

[Cameron McCormack <ca...@mcc.id.au>]

Hi Simon.

S. Woodside:
> > The thing is, my web app is in Rails, and I'm not too sure if doing a  
> > system() call out to run batik is going to be very efficient. I seem  
> > to recall that running java -jar has a lot of overhead, and then  
> > maybe there's memory issues, or other things? I know that batik takes  
> > several seconds on my (old) server to render my test SVG to PDF, and  
> > I need sub-second times.

Jeremias Maerki:
> You're on the right track. You'd have to write a web service wrapper
> around Batik. Or you could put it in a servlet. I don't think there's
> anything that you could use out-of-the-box. Good luck!

As Jeremias says, something that keeps a JVM running all the time is
what you need.  I wrote a small, sample transcoding Java servlet here:

  http://mcc.id.au/2007/09/batik-course/code/transcoding-servlet/

You could have that running, and invoke it (via HTTP) from your rails
application.

Jetty is a simple Java servlet container that you can use to run the
above servlet.

-- 
Cameron McCormack, http://mcc.id.au/
	xmpp:heycam@jabber.org  ▪  ICQ 26955922  ▪  MSN cam@mcc.id.au

---------------------------------------------------------------------
To unsubscribe, e-mail: batik-users-unsubscribe@xmlgraphics.apache.org
For additional commands, e-mail: batik-users-help@xmlgraphics.apache.org

Re: running batik efficiently in a web server environment (linux)

["S. Woodside" <sb...@yahoo.com>]

On Mar 5, 2008, at 10:17 PM, Cameron McCormack wrote:
> As Jeremias says, something that keeps a JVM running all the time is
> what you need.  I wrote a small, sample transcoding Java servlet here:
>
>   http://mcc.id.au/2007/09/batik-course/code/transcoding-servlet/

Thank you so much for this. I took your servlet and modified it a  
bit, running it under Jetty, to make it output PDF. See the new code  
below.

I had a bit of a problem with your servlet, with jetty 5 not being  
happy with xerces. Anyway, tossed out your lib directory you had and  
wound up needing only these ones:

avalon-framework-4.2.0.jar
batik-all-1.6.jar
commons-io-1.3.1.jar
fop.jar
xmlgraphics-commons-1.2.jar

--simon

PS It's very quick :-)



// Source for TranscodingServlet.java
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.fop.svg.PDFTranscoder;
import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;

public class TranscodingServlet extends HttpServlet {

     public void doGet(HttpServletRequest request,
                       HttpServletResponse response)
         throws IOException, ServletException {
         response.setContentType("application/pdf");
         String uri = request.getParameter("uri");
         PDFTranscoder t = new PDFTranscoder();
         TranscoderInput input = new TranscoderInput(uri);
         TranscoderOutput output = new TranscoderOutput 
(response.getOutputStream());
         try {
             t.transcode(input, output);
         } catch (TranscoderException ex) {
             throw new ServletException(ex);
         }
     }
}

--
http://simonwoodside.com


On Mar 5, 2008, at 10:17 PM, Cameron McCormack wrote:
> Hi Simon.
>
> S. Woodside:
>>> The thing is, my web app is in Rails, and I'm not too sure if  
>>> doing a
>>> system() call out to run batik is going to be very efficient. I seem
>>> to recall that running java -jar has a lot of overhead, and then
>>> maybe there's memory issues, or other things? I know that batik  
>>> takes
>>> several seconds on my (old) server to render my test SVG to PDF, and
>>> I need sub-second times.
>
> Jeremias Maerki:
>> You're on the right track. You'd have to write a web service wrapper
>> around Batik. Or you could put it in a servlet. I don't think there's
>> anything that you could use out-of-the-box. Good luck!
>
> As Jeremias says, something that keeps a JVM running all the time is
> what you need.  I wrote a small, sample transcoding Java servlet here:
>
>   http://mcc.id.au/2007/09/batik-course/code/transcoding-servlet/
>
> You could have that running, and invoke it (via HTTP) from your rails
> application.
>
> Jetty is a simple Java servlet container that you can use to run the
> above servlet.
>
> -- 
> Cameron McCormack, http://mcc.id.au/
> 	xmpp:heycam@jabber.org  ▪  ICQ 26955922  ▪  MSN cam@mcc.id.au
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: batik-users-unsubscribe@xmlgraphics.apache.org
> For additional commands, e-mail: batik-users- 
> help@xmlgraphics.apache.org
>

---------------------------------------------------------------------
To unsubscribe, e-mail: batik-users-unsubscribe@xmlgraphics.apache.org
For additional commands, e-mail: batik-users-help@xmlgraphics.apache.org