print("KONIEC", pid, len(known_processes), current_thread().name)
if not known_processes:
try:
global app_proc
app_proc.kill()
app_proc = None
except SystemError:
print('Error during killing chroma app')
# access global variables safely
processing_scheduler = ThreadPoolScheduler(1)
scanner = Observable.create(lambda subscriber: scan_processes(subscriber)) \
.distinct() \
.subscribe_on(NewThreadScheduler()) \
.publish()
# start chroma app when valid process shows up
scanner.observe_on(processing_scheduler) \
.subscribe(handle_audio_start)
# tear down chroma app when all valid processes are terminated
scanner.flat_map(lambda pid: Observable.from_callable(wait_for_end(pid), NewThreadScheduler())) \
.observe_on(processing_scheduler) \
.subscribe(handle_audio_end)
scanner.connect()
input()
