I need someone who is good in java. having hardcore java skills, knowledge of multi threading,latch,barriers,synchronization,threads creation and condition variables,MPI,Open MPI. priority,deadlocks etc.    this is urgent project.
Payment will be done accordingly to work.
if you apply to this project. answer this question or you can also provide a logic of this question.
Implement a barrier in Java using a countdown latch. Make sure that your barrier is reusable.?
thanks 
varun