Monitoring per-thread allocation using JRuby and java.lang.management.ThreadMXBean

	require 'java'
	require 'jruby'

	thread_bean = java.lang.management.ManagementFactory.thread_mx_bean

	t1 = Thread.new do
	a = nil
	loop do
	a = 'foo'
	end
	end
	t1_thread = JRuby.reference(t1).native_thread

	main = Thread.current
	main_thread = JRuby.reference(main).native_thread

	loop do
	sleep 1
	t1_alloc = thread_bean.get_thread_allocated_bytes([t1_thread.id].to_java(:long))[0]
	main_alloc = thread_bean.get_thread_allocated_bytes([main_thread.id].to_java(:long))[0]

	puts "main allocated: #{main_alloc}"
	puts "t1 allocated: #{t1_alloc}"
	end