[I'm CCing the mailing list, as this might be relevant for people wanting to play with JVMs on devices supported by RIOT]
Are you OK with me reaching out to you via email or GitHub, or would you
prefer that I keep these questions on the mailing list; or would you
prefer that I just figure things out for myself ? I'm only a
hesitant to use these mailing lists because I will likely have a lot of
initial questions and feel this is a pretty niche topic that not many
other RIOTers will care about.
You can send me an email or open issues on github. The RIOT mailinglist isn't really the place to talk about Ostfriesentee, since it does not have a lot to with RIOT. However, if you want to talk about porting Ostfriesentee to RIOT or writing RIOT specific libraries, that would be something to talk about on the RIOT mailinglist.
Before you start, you have to be aware of the limitations that Darjeeling/Ostfriesentee have.
1.) They are intended for smallish Java programs, have a look at the example apps
2.) They only support a minimal subset of the Java runtime libraries, have a look at the `lib` folder in the Ostfriesentee repo
3.) They are both research projects/proofs of concept, that never had the remaining bugs ironed out, so it is not unlikely for your microcontroller to crash on execution
Thus if you are looking into this for the fun of it, or if you want to find out, what kinds of JAVA programs you can possibly run on a cortex-m core (that has less processing power than the core that powers the SUN Sport devices) have a go at it. Just be aware, that you will not be able to run excessively large JAVA programs, are certain to run into bugs and that you will have to implement a lot of library functionality yourself.
Finally I can recommend the following papers, if you want to learn more about some efforts in the research community to run JAVA on deeply embedded devices, I can recommend the following papers:
Brouwers, Niels, Koen Langendoen, and Peter Corke. “Darjeeling, a Feature-Rich VM for the Resource Poor.” In Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems, 169–82. SenSys ’09. New York, NY, USA: ACM, 2009. doi:10.1145/1644038.1644056.
Aslam, Faisal, Luminous Fennell, Christian Schindelhauer, Peter Thiemann, Gidon Ernst, Elmar Haussmann, Stefan Rührup, and Zastash A. Uzmi. “Optimized Java Binary and Virtual Machine for Tiny Motes.” In Distributed Computing in Sensor Systems, edited by Rajmohan Rajaraman, Thomas Moscibroda, Adam Dunkels, and Anna Scaglione, 15–30. Lecture Notes in Computer Science 6131. Springer Berlin Heidelberg, 2010. http://link.springer.com/chapter/10.1007/978-3-642-13651-1_2.
Maye, Oliver, and Michael Maaser. “Comparing Java Virtual Machines for Sensor Nodes.” In Grid and Pervasive Computing, edited by James J. (Jong Hyuk) Park, Hamid R. Arabnia, Cheonshik Kim, Weisong Shi, and Joon-Min Gil, 181–88. Lecture Notes in Computer Science 7861. Springer Berlin Heidelberg, 2013. http://link.springer.com/chapter/10.1007/978-3-642-38027-3_19.