Hi Craig, Thanks for testing and for the feedback. Based on that feedback, I pushed a change so that the HeadlessApplication now responds properly to a `Platform.exit()` call (see https://github.com/openjdk/jfx-sandbox/commit/5c8bcb2ca1f7a72f34c3e53e209b818abf8f8504 ). My implementation does a gentle stop of the processing thread, and already submitted runnables will be handled before the processing halts. I think this is how it should be, and it works with a simple application, but I didn't test it with a jpackaged application yet. It would be great if you can confirm that this is now fixed?
Thanks again for the feedback! - Johan On Tue, Apr 9, 2024 at 11:37 AM Craig Raw <craig...@gmail.com> wrote: > Hi Johan, > > As you advised in another thread, I've tested the headless glass platform > and find it to be an excellent solution. My particular use case is to > provide an alternative terminal interface (using Lanterna) for a JavaFX > application without needing to rewrite a great deal of the logic. For this > purpose, the headless glass platform works very well as a replacement to > Monocle. > > I encountered only one problem - calling Platform.exit() did not terminate > the application after it had been packaged with jpackage. This did not > occur with the same code using the JavaFX18 Monocle libraries on Linux > amd64. The JavaFX application thread was the only non-daemon thread at this > point. I solved this fairly simply by calling System.exit(0) after > Platform.exit(). > > As an aside, I was impressed by how simple it was to build JavaFX. I was > surprised though that javafx.graphics.jar did not contain the native > libraries, and I had to repackage the jar to include them manually. There > are probably good reasons for this, but it wasn't obvious. > > It would be really good to see the headless glass platform merged into > JavaFX proper, and would allow me to move beyond JavaFX 18, the last > version to have Monocle support for Linux amd64. > > Craig > > On Fri, Feb 2, 2024 at 10:50 AM Marius Hanl <mariush...@web.de> wrote: > >> I agree that this a nice feature, especially for headless tests as you >> also mentioned. >> Really looking forward to this feature. >> >> - Marius >> >> *Gesendet:* Dienstag, 30. Januar 2024 um 12:46 Uhr >> *Von:* "Johan Vos" <johan....@gluonhq.com> >> *An:* "openjfx-dev" <openjfx-dev@openjdk.org> >> *Betreff:* Headless glass platform >> Hi, >> >> I created a branch in the jfx-sandbox repository for experimenting with a >> headless glass platform: >> https://github.com/openjdk/jfx-sandbox/tree/johanvos-headless >> >> This addresses https://bugs.openjdk.org/browse/JDK-8324941 where I >> suggest a POC for a Headless platform. >> >> There are a number of usecases for this, including: >> 1. applications that require JavaFX rendering without presenting this to >> a window (and instead send it to a printer for example) >> 2. running tests without requiring a window manager. >> >> Regarding the second usecase, we already did some basic experiments using >> a modified version of TestFX where instead of the Monocle Headless >> subplatform, the POC Headless platform is used. >> >> By using a first-class Headless glass platform instead of a Monocle >> subplatform, it should be easier to use by developers. >> The monocle code contains very platform/os specific parts, which often >> don't make sense outside the target platform. This is very valuable, but it >> is also a very different usecase than a headless platform and it requires a >> much more complex build procedure. >> >> I added an initial, limited HeadlessRobot to do some basic tests. That >> code is mainly taken from the existing Monocle implementation, but I want >> to be careful to avoid anything that is not applicable to the headless >> scenarios. >> >> - Johan >> >> >
