Rodrigo,
I am not familiar with that pattern of use. How do you use the
RawScreen? Are you doing this with 2.2? I'm sure I tried extending
RawScreen and hit a problem but I cannot remember what.
On Wed, 2003-03-19 at 20:34, Rodrigo Reyes wrote:
> When I need to use the ServletOutputStream directly, I extend a screen from
> RawScreen. That RawScreen has been very useful to me. Still, I think we are
> removing it from Turbine 2.3. Hope I am wrong...
>
> Rodrigo
>
> ----- Original Message -----
> From: "Peter Courcoux" <[EMAIL PROTECTED]>
> To: "Turbine Developers List" <[EMAIL PROTECTED]>
> Sent: Wednesday, March 19, 2003 3:19 PM
> Subject: Re: Direct Response and IllegalStateException
>
>
> > Henning,
> >
> >
> > On Wed, 2003-03-19 at 13:12, Henning P. Schmiedehausen wrote:
> > > Peter Courcoux <[EMAIL PROTECTED]> writes:
> > >
> > > >Hi all,
> > >
> > > >I have recently changed from using turbine 2.2-b3 to 2.2.1 and from
> > > >using VelocityECSLayout to VelocityOnlyLayout.
> > >
> > > Actually, I'm getting more and more unhappy with the deprecation of
> > > VelocityECSLayout. There seem to be many quirks that can't be fixed
> > > in a clean manner. We might have to think about this a little more.
> > >
> > > >One of my actions which extends VelocitySecureAction handles a file
> > > >download by obtaining the HttpServletResponse setting the headers and
> > > >then obtaining and writing directly to the ServletOutputStream.
> > >
> > > >Before the changes outlined above this caused no problem. Having made
> > > >the changes the following Exception occurs after the completion of the
> > > >download and closing the ServletOutputStream.
> > >
> > > Could you please post some code snippets. How do you do the file
> > > download? Directly from the action (you shouldn't do that) or do you
> > > have a screen which does the download to which you redirect? I'm
> > > getting a little scared by reading that you try to manipulate the
> > > Servlet output stream by yourself. :-)
> > >
> > > Regards
> > > Henning
> >
> > As mentioned off-list, I have a need to build a zip file of multiple
> > download files and the easiest way I have found is to directly
> > manipulate the ServletOutputStream. This also applies where I am
> > building images for embedding within pages of data.
> >
> > I have solved this by creating a DirectResponseLayout class which does
> > nothing except check that declareDirectResponse() has been called on
> > RunData. I then call
> >
> > data.setLayout("DirectResponseLayout");
> >
> > in my Action class.
> >
> > Source of DirectResponseLayout :-
> >
> > package com.whatever.modules.layouts;
> >
> > // Turbine Classes
> > import org.apache.turbine.modules.Layout;
> > import org.apache.turbine.util.RunData;
> >
> > /**
> > * This layout allows an action to manipulate the
> > * ServletOutputStream directly. It requires that
> > * data.declareDirectResponse() has been called to
> > * indicate that the OutputStream is being
> > * handled else an Exception is thrown
> > *
> > * @author <a href="mailto:[EMAIL PROTECTED]">Peter Courcoux</a>
> > */
> > public class DirectResponseLayout extends Layout
> > {
> > /**
> > * Method called by LayoutLoader.
> > *
> > * @param RunData
> > */
> > public void doBuild( RunData data ) throws Exception
> > {
> > if (!data.isOutSet())
> > {
> > throw new Exception(
> > "data.declareDirectResponse() has not been called");
> > }
> > }
> > }
> >
> >
> >
> > One drawback is that it calls data.isOutSet() which is deprecated.
> >
> > Questions.
> >
> > 1. Is there a better way?
> > 2. If not, would it be worth including the DirectResponseLayout class in
> > the turbine distribution.
> > 3. Is there a case for removing the deprecation of RunData.isOutSet()?
> > 4. Is this worth documenting. At least one other user appears to be
> > doing something similar.
> >
> > Regards
> >
> > Peter
> > --
> > Peter Courcoux <[EMAIL PROTECTED]>
> >
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>
>
>
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Regards,
Peter
--
Peter Courcoux <[EMAIL PROTECTED]>
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