Julie:
Thank you very much for the idea.
Your idea was correct. When I finally set up the code to properly
consume the generated output, Rosegarden also started (and ran)
asynchronously.
- Aere
On Thu, 2012-03-08 at 20:18 -0800, Julie S wrote:
> Hello Aere,
>
> when Runtime.exec() is run, it returns a Process Object:
> http://docs.oracle.com/javase/6/docs/api/
>
> RG sends lots of into to the main output streams, If you are not
> reading from the streams, this may cause the application to block (see
> api documentation link above).
>
> RG sends lots of stuff to standard output on startup. So if the
> stream is not getting drained, this will create blocking -- probably
> the blocking you are experiencing.
>
> Sincerely,
> Julie S.
>
> --- On Wed, 3/7/12, Aere Greenway <[email protected]> wrote:
>
>
> From: Aere Greenway <[email protected]>
> Subject: [Rosegarden-devel] Question on running Rosegarden
> from inside a Java program
> To: "Rosegarden Developers"
> <[email protected]>
> Date: Wednesday, March 7, 2012, 8:08 PM
>
>
> Rosegarden Developers:
>
> I have been experimenting with running various Linux MIDI
> components from within a Java program, and my experiments have
> been successful, with one exception:
>
> When I attempt to run rosegarden from within the Java program
> (using an instance of the "Runtime" class, and its "exec"
> method), the new subprocess does not start up until after the
> Java program is terminated. Then it (rosegarden) starts up,
> and runs with no problems.
>
> None of the other MIDI components I am controlling with the
> Java program (qjackctl, qsynth, vmpk, and audacious) behave
> this way. They all start up (and run) immediately, and
> asynchronously.
>
> I don't think it's a matter of rosegarden needing a lot of
> resources, since I have been able to start the gimp, and even
> virtualbox (in its place) from within the Java program. Even
> if rosegarden is the only program I start within the Java
> program, it won't start until after I terminate the Java
> program.
>
> Do any of you have any idea of why this happens, and if so, is
> there any way to work around it?
>
> I am using Lubuntu 11.10 , which uses the 11.06 "Don Juan"
> version of Rosegarden, and I am using Open Java 6 (from the
> Ubuntu distribution).
>
> --
>
> Sincerely,
> Aere
>
> --
>
> Sincerely,
> Aere
>
>
> -----Inline Attachment Follows-----
>
>
>
> ------------------------------------------------------------------------------
> Virtualization & Cloud Management Using Capacity Planning
> Cloud computing makes use of virtualization - but cloud
> computing
> also focuses on allowing computing to be delivered as a
> service.
> http://www.accelacomm.com/jaw/sfnl/114/51521223/
>
>
> -----Inline Attachment Follows-----
>
>
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--
Sincerely,
Aere
------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
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