def test_buf_overfull(self):
c = Chan(5)
go(sayset, c, list(range(20)), delay=0)
time.sleep(0.1) # Fill up buffer
results = list(c)
self.assertEqual(results, list(range(20)))
def timer(duration):
def timer_thread(chan, duration):
time.sleep(duration)
chan.put(time.time())
c = Chan()
go(timer_thread, c, duration)
return c
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 fan_in(input1, input2):
def forwarder(input, output):
while True:
output.put(input.get())
c = Chan()
go(forwarder, input1, c)
go(forwarder, input2, c)
return c
def fan_in(*input_list):
def forward(input, output):
while True:
output.put(input.get())
c = Chan()
for input in input_list:
go(forward, input, c)
return c
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")
def fan_in(input1, input2):
c = Chan()
def forward():
while True:
chan, value = select([input1, input2], [])
c.put(value)
go(forward)
return c
def test_select_and_closed(self):
a, b, c = [Chan() for _ in range(3)]
out = Chan()
go(sayset, a, [0, 1, 2], delay=0.01, __name='sayset1')
go(sayset, b, [3, 4, 5], delay=0.01, __name='sayset2')
go(sayset, c, [6, 7, 8], delay=0.01, __name='sayset2')
def fanin_until_closed(inchans, outchan):
inchans = inchans[:]
while inchans:
try:
_, val = select(inchans, [])
out.put(val)
except ChanClosed as ex:
inchans.remove(ex.which)
out.close()
go(fanin_until_closed, [a, b, c], out, __name='fanin')
into = []
acc = go(accumulator, out, into)
acc.join(10)
self.assertFalse(acc.is_alive())
results = set(into)
self.assertEqual(len(results), 9)
self.assertEqual(results, set(range(9)))
def boring(message):
def sender(message, c):
i = 0
while True:
c.put("%s: %d" % (message, i))
time.sleep(0.2 * random.random())
i += 1
c = Chan()
go(sender, message, c)
return c
def boring(msg):
c = Chan()
def sender():
i = 0
while True:
c.put("%s: %d" % (msg, i))
time.sleep(1.5 * random.random())
i += 1
go(sender)
return c
def boring(msg):
c = Chan()
wait_for_it = Chan()
def sender():
i = 0
while True:
c.put(Message("%s: %d" % (msg, i), wait_for_it))
time.sleep(0.2 * random.random())
wait_for_it.get()
i += 1
go(sender)
return c
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
def test_iter_and_closed(self):
c = Chan()
go(sayset, c, [1, 2, 3], delay=0)
def listener():
it = iter(c)
self.assertEqual(next(it), 1)
self.assertEqual(next(it), 2)
self.assertEqual(next(it), 3)
self.assertRaises(StopIteration, it.__next__)
t = go(listener)
time.sleep(0.1)
self.assertFalse(t.is_alive())
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 ?')
def example_daisy():
def f(left, right):
left.put(1 + right.get())
N = 1000 # Python's threads aren't that lightweight
leftmost = Chan()
rightmost = leftmost
left = leftmost
for i in xrange(N):
right = Chan()
go(f, left, right)
left = right
def putter():
right.put(1)
go(putter)
print leftmost.get()
def read_read_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)
"""
ch1 = Chan()
ch2 = Chan()
def write_channel1():
"""Write 42 into ch1"""
py_output.write('Writing 42 to ch1\n'.encode())
ch1.put(42)
def write_channel2():
"""Write 51 into ch2"""
py_output.write('Writing 51 to ch2\n'.encode())
ch2.put(51)
go(write_channel1)
go(write_channel2)
time.sleep(0.1)
# Hopefully this is enough time to let
# the other two goroutines block on their channel writes
chan, nb = select(consumers=[ch1, ch2], producers=[], default=True)
if chan == ch1:
py_output.write('Received number {} from ch1\n'.format(nb).encode())
elif chan == ch2:
py_output.write('Received number {} from ch2\n'.format(nb).encode())
elif chan == 'default':
raise Exception('Selected default behavior')
if nb == 42: # ch1.get() happened
assert ch2.get() == 51, "We should be able to read '51' from ch2"
elif nb == 51: # ch2.get() happened
assert ch1.get() == 42, "We should be able to read '42' from ch1"
else:
raise Exception('WTF ?')
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 main():
FetcherCls = MockFetcher
merged = Merged([
Subscription(FetcherCls('blog.golang.org')),
Subscription(FetcherCls('googleblog.blogspot.com')),
Subscription(FetcherCls('googledevelopers.blogspot.com'))
])
# Close after a while
def close_later():
time.sleep(3)
print("Closed: {}".format(merged.close()))
go(close_later)
for it in merged.updates():
print("{} -- {}".format(it.channel, it.title))
time.sleep(0.1)
print("Still active: (should only be _MainThread and timeouts)")
for active in threading._active.itervalues():
print(" {}".format(active))
def read():
"""The select should block,
Then, the <- ch1 case should be executed very soon after
the other goroutine times out.
Expected output :
-----------------
Writing 42 to ch1
Waited 1.00[0-9]*s
"""
ch1 = Chan()
def write_channel_delayed():
"""Write an int nb into a channel ch with a delay of 1 second"""
time.sleep(1)
py_output.write('Writing 42 to ch1\n'.encode())
ch1.put(42)
go(write_channel_delayed)
start = time.time()
chan, nb = select(consumers=[ch1], producers=[])
if chan == ch1:
py_output.write('Waited {}\n'.format(time.time() - start).encode())
def test_nothing_lost(self):
phrases = ['Hello_%03d' % x for x in range(1000)]
firstchan = Chan()
chan_layer1 = [Chan() for i in range(6)]
lastchan = Chan()
sayer = go(sayset, firstchan, phrases, delay=0.001, __name='sayer')
# Distribute firstchan -> chan_layer1
for i in range(12):
outchans = [
chan_layer1[(i + j) % len(chan_layer1)] for j in range(3)
]
go(distributer, [firstchan],
outchans,
delay_max=0.005,
__name='dist_layer1_%02d' % i)
# Distribute chan_layer1 -> lastchan
for i in range(12):
inchans = [
chan_layer1[(i + j) % len(chan_layer1)]
for j in range(0, 9, 3)
]
go(distributer,
inchans, [lastchan],
delay_max=0.005,
__name='dist_layer2_%02d' % i)
results = []
go(accumulator, lastchan, results, __name='accumulator')
sayer.join(10)
self.assertFalse(sayer.is_alive())
time.sleep(1) # Unsafe. Lets the data propagate to the accumulator
# Checks that none are missing, and there are no duplicates.
self.assertEqual(len(results), len(phrases))
self.assertEqual(set(results), set(phrases))
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
def test_buf_kept_empty(self):
c = Chan(5)
go(sayset, c, list(range(20)), delay=0.02)
results = list(c)
self.assertEqual(results, list(range(20)))
