Hi, https://github.com/groupon/jesos
is a pure Java implementation of the SchedulerDriver, ExecutorDriver and State APIs. It is feature complete and somewhat tested (it runs Marathon and Singularity here in-house in non-production (lab) settings). This requires Mesos 0.19 or better (it uses the HTTP APIs). I am planning to do a release later this week, I also want to shade the (somewhat uncomfortable) number of dependencies (offering both a shaded and an unshaded version). Feedback, forks, pull requests very welcome. -h