[oe] Why no recipe for openjdk-headless?

[Bruce, Henry]

I'm putting together an OS image that includes  a Java headless application. Having used the openjdk7-jre-headless package on Ubuntu I was hoping to find a matching recipe, but sadly none exist,.  The openjdk7-jre recipe requires the X11 distro feature which adds unnecessary luggage for a small footprint IoT solution. Thanks to a bbappend from https://github.com/woglinde/meta-java/issues/45 I can minimize footprint, but a headless recipe would be a better solution.  I'm fairly new to Yocto so could someone explain the challenges of a headless recipe and where one might start when creating one?

Henry Bruce