dos_only_in_jruby.rb

# this terminates quickly in mri but hangs in jruby
def regex_dos
  "foo========:bar baz================================================bingo".scan(/(?:=+=+)+:/)
end

t = Thread.new { regex_dos(); puts "done" }
puts t.status
t.kill
puts t.status
t.join
puts "joined"

using_interrupt.rb

posstr = "NRNRNNVVNRNNNNNNPUNNNNPUNRNNNNNNNNNNNNNRNNNNNRNNNRNNNNJJNNCCNNNRNNVVNNNNNRNNNNNRNNNNNRNNNNNRNNNRNNNNNNNNNNCCNNNNNNNNNNNNNNNRNNNNNNPUNNNNPUNNNNNNNRNNNNNNNRNNNNNNNNNNNNNNNNNNNNNNNNNRNNNNNNNNVVNNNNNNNNNNNNNNNNNNNNNRNNNNNNNNNRNNNNNNPUNNNNPUNRNNNNNNNNCCNNJJNN"
re = /((?:(?:(?:JJ|VA)(?:DEC)?)*|AS)?(?:(?:NN|NR|NT)+(?:PU|CC|PP)?)+)$/

re_thread = Thread.new { posstr.scan(re) }

java_thread = JRuby.reference(re_thread).native_thread

# timeout after 1 seconds
sleep 1
java_thread.interrupt
sleep 1

# wait for thread to die
re_thread.join
puts "successfully interrupted thread!"

using_timeout.rb

require 'timeout'

posstr = "NRNRNNVVNRNNNNNNPUNNNNPUNRNNNNNNNNNNNNNRNNNNNRNNNRNNNNJJNNCCNNNRNNVVNNNNNRNNNNNRNNNNNRNNNNNRNNNRNNNNNNNNNNCCNNNNNNNNNNNNNNNRNNNNNNPUNNNNPUNNNNNNNRNNNNNNNRNNNNNNNNNNNNNNNNNNNNNNNNNRNNNNNNNNVVNNNNNNNNNNNNNNNNNNNNNRNNNNNNNNNRNNNNNNPUNNNNPUNRNNNNNNNNCCNNJJNN"
re = /((?:(?:(?:JJ|VA)(?:DEC)?)*|AS)?(?:(?:NN|NR|NT)+(?:PU|CC|PP)?)+)$/

status = Timeout::timeout(5) { posstr.scan(re) }
puts status