class DiscoTimer(object):
def __init__(self, base=1000, jitter=500):
self.trip = False
self._stop = threading.Event()
self.chan = Chan()
self._thread = threading.Thread(name='LightTimer', target=self.run)
self._thread.daemon = True
self._thread.start()
self.base = base
self.jitter = jitter
random.seed()
def run(self):
while not self._stop.is_set():
random_lights = []
for l in lights.ALL:
maybe = random.randint(0, 1)
if maybe == 1:
random_lights.append(l)
self.chan.put(random_lights)
d = random.randint(0, 1)
ti = self.base
ji = random.randint(0, self.jitter)
if d == 0:
ti = ti + ji
else:
ti = ti - ji
time.sleep(ti / 1000)
def stop(self):
self._stop.set()
def test_buf_simple(self):
S = 5
c = Chan(S)
for i in range(S):
c.put(i)
c.close()
results = list(c)
self.assertEqual(results, list(range(S)))
def write_write_default():
"""Two channels can be read and there's a default clause
Expected output :
-----------------
Writing (42|51) to ch(1|2)
Writing (42|51) to ch(1|2)
Received number (42|51) from ch(1|2)
"""
ch1A = Chan()
ch1B = Chan()
ch2A = Chan()
ch2B = Chan()
def read_channel1():
"""Read the value in ch1A and write it in ch1B"""
py_output.write('Reading from ch1\n'.encode())
x = ch1A.get()
ch1B.put(x)
def read_channel2():
"""Read the value in ch2A and write it in ch2B"""
py_output.write('Reading from ch2\n'.encode())
x = ch2A.get()
ch2B.put(x)
go(read_channel1)
go(read_channel2)
time.sleep(0.1)
# Hopefully this is enough time to let
# the other two goroutines block on their channel writes
nb1 = 42
nb2 = 51
sent = 0
chan, nb = select(consumers=[],
producers=[(ch1A, 42), (ch2A, 51)],
default=True)
if chan == ch1A:
py_output.write('Sent number 42 to ch2\n'.encode())
sent = nb1
elif chan == ch2A:
py_output.write('Sent number 51 to ch2\n'.encode())
sent = nb2
elif chan == 'default':
raise Exception('Selected default behavior')
if sent == 42: # ch1.put(42) happened
ch2A.put(17)
assert ch1B.get() == 42, "We should be able to read 42 from ch1B"
elif sent == 51: # ch2.put(51) happened
ch1A.put(17)
assert ch2B.get() == 51, "We should be able to read 51 from ch2B"
else:
raise Exception('WTF ?')
def test_buf_simple(self):
S = 5
c = Chan(S)
for i in range(S):
c.put(i)
c.close()
results = list(c)
self.assertEqual(results, list(range(S)))
def test_simple(self):
chan = Chan()
results = []
quickthread(accumulator, chan, results)
chan.put("Hello")
time.sleep(0.01) # Technically unsafe
self.assertEqual(len(results), 1)
self.assertEqual(results[0], "Hello")
def test_simple(self):
chan = Chan()
results = []
go(accumulator, chan, results)
chan.put("Hello")
time.sleep(0.01) # Technically unsafe
self.assertEqual(len(results), 1)
self.assertEqual(results[0], "Hello")
class Subscription(object):
def __init__(self, fetcher):
self.fetcher = fetcher
self.updates_chan = Chan()
self.quit = Chan()
self.thread = threading.Thread(
name='Subscription',
target=self._run)
#self.thread.daemon = True
self.thread.start()
def _run(self):
next_time = time.time()
pending = [] # First is most recent. Should be a deque
err = None
while True:
start_fetch = timeout_after(max(0.0, next_time - time.time()))
# Does or doesn't wait on updates_chan depending on if we have
# items ready.
if pending:
outchans = [(self.updates_chan, pending[0])]
else:
outchans = []
ch, value = chanselect([self.quit, start_fetch], outchans)
if ch == self.quit:
errc = value
self.updates_chan.close()
errc.put(err)
return
elif ch == start_fetch:
try:
err = None
item_list, next_time = self.fetcher.fetch()
except Exception as ex:
err = ex
next_time = time.time() + 10.0
continue
pending.extend(item_list)
else: # self.updates_chan
pending.pop(0) # Pops the sent item
def updates(self):
return self.updates_chan
def close(self):
errc = Chan()
self.quit.put(errc)
result = errc.get()
self.thread.join(0.2)
assert not self.thread.is_alive()
return result
class Subscription(object):
def __init__(self, fetcher):
self.fetcher = fetcher
self.updates_chan = Chan()
self.quit = Chan()
self.thread = threading.Thread(name='Subscription', target=self._run)
#self.thread.daemon = True
self.thread.start()
def _run(self):
next_time = time.time()
pending = [] # First is most recent. Should be a deque
err = None
while True:
start_fetch = timeout_after(max(0.0, next_time - time.time()))
# Does or doesn't wait on updates_chan depending on if we have
# items ready.
if pending:
outchans = [(self.updates_chan, pending[0])]
else:
outchans = []
ch, value = chanselect([self.quit, start_fetch], outchans)
if ch == self.quit:
errc = value
self.updates_chan.close()
errc.put(err)
return
elif ch == start_fetch:
try:
err = None
item_list, next_time = self.fetcher.fetch()
except Exception as ex:
err = ex
next_time = time.time() + 10.0
continue
pending.extend(item_list)
else: # self.updates_chan
pending.pop(0) # Pops the sent item
def updates(self):
return self.updates_chan
def close(self):
errc = Chan()
self.quit.put(errc)
result = errc.get()
self.thread.join(0.2)
assert not self.thread.is_alive()
return result
def read_write_default():
"""One channel can be read, the written and there's a default clause
Expected output :
-----------------
(Writing 42 to ch1|Reading from ch2)
(Writing 42 to ch1|Reading from ch2)
(Received number 42 from ch1|Sent number 51 to ch2)
"""
ch1 = Chan()
ch2 = Chan()
def write_channel():
"""Write 42 into ch1"""
py_output.write('Writing 42 to ch1\n'.encode())
ch1.put(42)
def read_channel():
"""Read the value in ch2 and write it in ch1"""
py_output.write('Reading from ch2\n'.encode())
x = ch2.get()
ch1.put(x)
go(write_channel)
go(read_channel)
time.sleep(0.1)
# Hopefully this is enough time to let
# the other two goroutines block on their channel writes
nb = 51
chan, nb = select(consumers=[ch1], producers=[(ch2, 51)], default=True)
if chan == ch1:
py_output.write('Received number {} from ch1\n'.format(nb).encode())
elif chan == ch2:
py_output.write('Sent number 51 to ch2\n'.encode())
elif chan == 'default':
raise Exception('Selected default behavior')
if nb == 42: # ch1.get() happened
ch2.put(17)
assert ch1.get() == 17, "We should be able to read 17 from ch1"
elif nb is None: # ch2.put(51) happened
assert ch1.get() == 42, "We should be able to read '42' from ch1"
else:
raise Exception('WTF ?')
class Merged(object):
def __init__(self, subscriptions):
self.subscriptions = subscriptions
self.updates_chan = Chan()
self.quit = Chan()
self.thread = threading.Thread(
name="Merged",
target=self._run)
self.thread.start()
def _close_subs_collect_errs(self):
return [sub.close() for sub in self.subscriptions]
def _run(self):
subchans = [sub.updates() for sub in self.subscriptions]
while True:
c, value = chanselect(subchans + [self.quit], [])
if c == self.quit:
value.put(self._close_subs_collect_errs())
self.updates_chan.close()
return
else:
item = value
c, _ = chanselect([self.quit], [(self.updates_chan, item)])
if c == self.quit:
value.put(self._close_subs_collect_errs())
self.updates_chan.close()
return
else:
pass # Send successful
def updates(self):
return self.updates_chan
def close(self):
errc = Chan()
self.quit.put(errc)
result = errc.get()
self.thread.join(timeout=0.2)
assert not self.thread.is_alive()
return result
class Server(object):
def __init__(self, args):
self.chan = Chan()
self._server = SimpleXMLRPCServer(('0.0.0.0', SERVER_PORT),
logRequests=False,
allow_none=True)
self.mode = args.mode
self._server.register_introspection_functions()
self._server.register_instance(self)
self._stop = threading.Event()
self.changed = 0
if args.controls:
self._thread = threading.Thread(name='Server', target=self.run)
else:
self._thread = threading.Thread(name='Server',
target=self._server.serve_forever)
self._thread.daemon = True
self._thread.start()
def run(self):
while not self._stop.is_set():
mode = read_mode(self.mode)
now = int(round(time.time() * 1000))
if mode != self.mode and (now - self.changed > 250):
self.mode = mode
self.chan.put(('mode', self.mode), timeout=2.0)
self.changed = now
time.sleep(0.1)
def stop(self):
self._stop.set()
def status(self):
st = {'server': 'ok'}
try:
resp_chan = Chan(1)
self.chan.put(('status', resp_chan), timeout=0.5)
resp = resp_chan.get(timeout=0.5)
st.update(resp)
except Timeout:
st['loop'] = 'Error: Did not hear from main thread in time'
return st
def set_period(self, period):
self.chan.put(('set_period', period), timeout=2.0)
return True
def trip(self):
self.chan.put(('trip', ), timeout=2.0)
return True
class Merged(object):
def __init__(self, subscriptions):
self.subscriptions = subscriptions
self.updates_chan = Chan()
self.quit = Chan()
self.thread = threading.Thread(name="Merged", target=self._run)
self.thread.start()
def _close_subs_collect_errs(self):
return [sub.close() for sub in self.subscriptions]
def _run(self):
subchans = [sub.updates() for sub in self.subscriptions]
while True:
c, value = chanselect(subchans + [self.quit], [])
if c == self.quit:
value.put(self._close_subs_collect_errs())
self.updates_chan.close()
return
else:
item = value
c, _ = chanselect([self.quit], [(self.updates_chan, item)])
if c == self.quit:
value.put(self._close_subs_collect_errs())
self.updates_chan.close()
return
else:
pass # Send successful
def updates(self):
return self.updates_chan
def close(self):
errc = Chan()
self.quit.put(errc)
result = errc.get()
self.thread.join(timeout=0.2)
assert not self.thread.is_alive()
return result
class Server(object):
def __init__(self):
self.chan = Chan()
self._server = SimpleXMLRPCServer(
('0.0.0.0', SERVER_PORT),
logRequests=False,
allow_none=True)
self._server.register_introspection_functions()
self._server.register_instance(self)
self._thread = threading.Thread(name='Server', target=self._server.serve_forever)
self._thread.daemon = True
self._thread.start()
def status(self):
st = {'server': 'ok'}
try:
resp_chan = Chan(1)
self.chan.put(('status', resp_chan), timeout=0.5)
resp = resp_chan.get(timeout=0.5)
st.update(resp)
except Timeout:
st['loop'] = 'Error: Did not hear from main thread in time'
return st
def set_period(self, period):
self.chan.put(('set_period', period), timeout=2.0)
return True
def trip(self):
self.chan.put(('trip',), timeout=2.0)
return True
def read_default():
"""The select should execute the default code as many times as needed
(hopefully once)
Then the <-ch1 case should happen
Expected output :
-----------------
Selected default behavior
Writing 42 to ch1
Received number 42 from ch1 after 1[0-9].[0-9]*µs
"""
ch1 = Chan()
ch2 = Chan()
def write_channel(ch):
"""Wait for ch to be readable and Write an int nb
into a channel ch"""
ch.get()
py_output.write('Writing 42 to ch1\n'.encode())
ch1.put(42)
go(write_channel, ch2)
from_ch1 = 0
wrote_to_ch2 = False
start = time.time()
while from_ch1 == 0:
chan, nb = select(consumers=[ch1], producers=[], default=True)
if chan == ch1:
elapsed = time.time() - start
from_ch1 = nb
py_output.write('Received number '
'{} from ch1 after '
'{}\n'.format(from_ch1, elapsed).encode())
if chan is 'default':
py_output.write('Selected default behavior\n'.encode())
if not wrote_to_ch2:
ch2.put(1)
wrote_to_ch2 = True
def example_rcvquit():
def boring(msg, quit):
c = Chan()
def sender():
i = 0
while True:
time.sleep(1.0 * random.random())
chan, _ = chanselect([quit], [(c, "%s: %d" % (msg, i))])
if chan == quit:
quit.put("See you!")
i += 1
quickthread(sender)
return c
quit = Chan()
c = boring("Joe", quit)
for i in xrange(random.randint(0, 10), 0, -1):
print c.get()
quit.put("Bye!")
print "Joe says:", quit.get()
def example_rcvquit():
def boring(msg, quit):
c = Chan()
def sender():
i = 0
while True:
time.sleep(1.0 * random.random())
chan, _ = select([quit], [(c, "%s: %d" % (msg, i))])
if chan == quit:
quit.put("See you!")
i += 1
go(sender)
return c
quit = Chan()
c = boring("Joe", quit)
for i in xrange(random.randint(0, 10), 0, -1):
print c.get()
quit.put("Bye!")
print "Joe says:", quit.get()
class LightTimer(object):
def __init__(self, period=DEFAULT_PERIOD, yellow=DEFAULT_YELLOW):
self.period = period
self.yellow = yellow
self.trip = False
self._stop = threading.Event()
self.chan = Chan()
self._thread = threading.Thread(name='LightTimer', target=self.run)
self._thread.daemon = True
self._thread.start()
def run(self):
STATES = [
[lights.RED1, lights.GRN2],
[lights.RED1, lights.YLW2],
[lights.GRN1, lights.RED2],
[lights.YLW1, lights.RED2],
]
state_i = len(STATES) - 1
t_last = 0
while not self._stop.is_set():
t_yellow = min(0.25 * self.period, DEFAULT_YELLOW)
t_green = self.period - t_yellow
dur = t_green if state_i % 2 == 0 else t_yellow
now = time.time()
if now > t_last + dur or self.trip:
t_last = now
state_i = (state_i + 1) % len(STATES)
self.chan.put(STATES[state_i])
self.trip = False
time.sleep(0.1)
self.chan.close()
def stop(self):
self._stop.set()
class LightTimer(object):
def __init__(self, period=DEFAULT_PERIOD, yellow=DEFAULT_YELLOW):
self.period = period
self.yellow = yellow
self.trip = False
self._stop = threading.Event()
self.chan = Chan()
self._thread = threading.Thread(name='LightTimer', target=self.run)
self._thread.daemon = True
self._thread.start()
def run(self):
STATES = [
[lights.RED1, lights.GRN2],
[lights.RED1, lights.YLW2],
[lights.GRN1, lights.RED2],
[lights.YLW1, lights.RED2],
]
state_i = len(STATES) - 1
t_last = 0
while not self._stop.is_set():
t_yellow = min(0.25 * self.period, DEFAULT_YELLOW)
t_green = self.period - t_yellow
dur = t_green if state_i % 2 == 0 else t_yellow
now = time.time()
if now > t_last + dur or self.trip:
t_last = now
state_i = (state_i + 1) % len(STATES)
self.chan.put(STATES[state_i])
self.trip = False
time.sleep(0.1)
self.chan.close()
def stop(self):
self._stop.set()
class SolidTimer(object):
def __init__(self, color, blink=False, period=0.5):
self.blink = blink
self.period = period
self.color = color.split('-')[0]
self.chan = Chan()
self._stop = threading.Event()
self._thread = threading.Thread(name='LightTimer', target=self.run)
self._thread.daemon = True
self._thread.start()
def run(self):
STATE = []
if self.color == 'red':
STATE = [lights.RED1, lights.RED2]
elif self.color == 'yellow':
STATE = [lights.YLW1, lights.YLW2]
elif self.color == 'green':
STATE = [lights.GRN1, lights.GRN2]
on = True
while not self._stop.is_set():
if on:
if self.blink:
self.chan.put([STATE[0]])
on = False
time.sleep(self.period)
else:
self.chan.put(STATE)
time.sleep(5)
else:
self.chan.put([STATE[1]])
on = True
time.sleep(self.period)
self.chan.close()
def stop(self):
self._stop.set()
def main(args):
"""
Backend for the Web interface to PMJQ.
Usage:
pmjq_sff [--exec=<exec.py>] --dl-folder=<folder>
[--root=<root>] --dl-url=<url> <eval>
Options:
--exec=<exec.py> Specify a Python file to be exec()d before <eval>
is eval()ed.
--root=<root> Working directory to evaluate other relative paths
from.
--dl-folder=<folder> Directory where the output files will be made
available to the users.
--dl-url=<url> Publicly accessible URL of <folder>
"""
root = os.path.normpath(abspath(args['--root'])) \
if args['--root'] is not None else None
if os.path.isabs(args['--dl-folder']):
dlfolder = args['--dl-folder']
elif root is not None:
dlfolder = pjoin(root, args['--dl-folder'])
else:
dlfolder = os.path.abspath(args('--dl-folder'))
dlurl = args['--dl-url']
nonce = str(random.randint(0, 10000)).zfill(4)
# The job id is the name of the file, the extension will come from the user
job_id = dt.now().isoformat() + "_" + nonce
inputs, outputs, logs = run_on_transitions_from_cli(
args, find_leaves, root=root)
for indir in inputs: # Write input files
assert ':' not in indir, \
"FIXME: (later) ':' in dir names not supported yet"
send("input:" + indir)
sys.stderr.write("Watching log files: ")
sys.stderr.write(str(logs)+"\n")
logch = Chan()
for logfile in logs:
go(tail_filter_and_process, fname=logfile,
filterfunc=get_default_filter(job_id),
handlerfunc=default_handler, chan=logch)
go(tail_filter_and_process, fname=logfile,
filterfunc=waiting_filter,
handlerfunc=waiting_handler,
root=root or "", chan=logch)
go(tail_filter_and_process, fname=logfile,
filterfunc=get_error_filter(job_id),
handlerfunc=error_handler,
root=root or "", chan=logch)
i = 0
ch = Chan()
sys.stderr.write("Watching output dirs: ")
sys.stderr.write(str(outputs)+"\n")
for outdir in outputs:
prefix = os.path.basename(os.path.normpath(outdir)) + str(i)
i += 1
go(move_and_print, outdir, job_id,
dlfolder, dlurl, ch, prefix)
go(handle_inputs, inputs, job_id)
# Wait for output to be processed
for _ in range(len(outputs)):
ch.get()
for _ in range(len(logs)*3):
logch.put(True)
for _ in range(len(logs)*3):
logch.get()
return
