def sleep(secs):
"""Sleep for a given number of seconds.
This is different from Python's `time.sleep()` in that it allows breaking
and stopping the sleep, and supports dry run mode. Fractional values are
supported.
Examples:
>>> sleep(10) # sleep for 10 seconds
>>> sleep(0.5) # sleep for half a second
"""
session.log.info('sleeping for %.1f seconds...', secs)
if session.mode == SIMULATION:
session.clock.tick(secs)
return
def f_notify(tmr):
session.breakpoint(2) # allow break and continue here
session.action('%s left' % formatDuration(tmr.remaining_time()))
session.beginActionScope('Sleeping')
session.action('%s left' % formatDuration(secs))
try:
tmr = Timer(secs)
tmr.wait(interval=1.0, notify_func=f_notify)
finally:
session.endActionScope()
def preparePoint(self, num, xvalues):
if session.mode == SIMULATION and num > self._simpoints:
session.log.info('skipping %d points...',
self._numpoints - self._simpoints)
duration = session.clock.time - self._sim_start
session.clock.tick(duration * (self._numpoints - self._simpoints))
if self._numpoints < 0 and not self._sweepdevices:
session.log.info('would scan indefinitely, skipping...')
raise StopScan
if num == 1:
self._etime.started = currenttime()
if self._sweeptargets:
try:
self.moveDevices(self._sweepdevices,
self._sweeptargets,
wait=False)
except SkipPoint:
raise StopScan
elif self._delay:
# wait between points, but only from the second point on
session.action('Delay')
session.delay(self._delay)
Scan.preparePoint(self, num, xvalues)
if session.mode == SIMULATION:
self._sim_start = session.clock.time
def doStart(self):
try:
if self._attached_rc.read(0) != 'on':
self.log.warning('radial collimator is not moving!')
except NicosError:
self.log.warning('could not check radial collimator', exc=1)
self._update()
self._last_time = 0
self._last_counts = 0
self._last_moncounts = 0
self._starttime = currenttime()
self._setROParam('rates', [[0., 0.], [0., 0.]])
session.action('run# %06d' % session.experiment.lastpoint)
GenericDetector.doStart(self)
def preparePoint(self, num, xvalues):
if session.mode == SIMULATION and num > self._simpoints:
session.log.info('skipping %d points...',
self._numpoints - self._simpoints)
duration = session.clock.time - self._sim_start
session.clock.tick(duration * (self._numpoints -
self._simpoints))
if self._numpoints < 0 and not self._sweepdevices:
session.log.info('would scan indefinitely, skipping...')
raise StopScan
if num == 1:
self._etime.started = currenttime()
if self._sweeptargets:
try:
self.moveDevices(self._sweepdevices, self._sweeptargets,
wait=False)
except SkipPoint:
raise StopScan # pylint:disable=raise-missing-from
if self._minstep:
self._laststep = [dev.read() for dev in self._sweepdevices]
else:
if self._delay:
# wait between points, but only from the second point on
session.action('Delay')
session.delay(self._delay)
if self._sweepdevices and self._minstep:
# wait until next step
while True:
position = [dev.read() for dev in self._sweepdevices]
l = list(zip(self._laststep, position, self._minstep))
if any(abs(x-y) > z for x,y,z in l):
break
if not any(dev.status()[0] == status.BUSY
for dev in self._sweepdevices):
break
self._laststep = [(x + z if x < y else x - z) for x,y,z in l]
Scan.preparePoint(self, num, xvalues)
if session.mode == SIMULATION:
self._sim_start = session.clock.time
def f_notify(tmr):
session.breakpoint(2) # allow break and continue here
session.action('%s left' % formatDuration(tmr.remaining_time()))
def multiWait(devices):
"""Wait for the *devices*.
Returns a dictionary mapping devices to current values after waiting.
This is the main waiting loop to be used when waiting for multiple devices.
It checks the device status until all devices are OK or errored.
Errors raised are handled like in the following way:
The error is logged, and the first exception with the highest serverity
(exception in `CONTINUE_EXECPTIONS` < `SKIP_EXCPTIONS` < other exceptions)
is re-raised at the end.
*baseclass* allows to restrict the devices waited on.
"""
from nicos.core.device import Waitable
def get_target_str():
return ', '.join(
'%s -> %s' %
(dev,
dev.format(dev.target)) if hasattr(dev, 'target') else str(dev)
for dev in reversed(devlist))
delay = 0.3
final_exc = None
devlist = list(devIter(devices, baseclass=Waitable, allwaiters=True))
session.log.debug('multiWait: initial devices %s, all waiters %s', devices,
devlist)
values = {}
loops = -2 # wait 2 iterations for full loop
eta_update = 1 if session.mode != SIMULATION else 0
first_ts = currenttime()
session.beginActionScope('Waiting')
eta_str = ''
target_str = get_target_str()
session.action(target_str)
try:
while devlist:
session.log.debug('multiWait: iteration %d, devices left %s',
loops, devlist)
loops += 1
for dev in devlist[:]:
try:
done = dev.isCompleted()
if done:
dev.finish()
except Exception:
final_exc = filterExceptions(sys.exc_info(), final_exc)
# remove this device from the waiters - we might still have
# its subdevices in the list so that multiWait() should not
# return until everything is either OK or ERROR
devlist.remove(dev)
if devlist:
# at least one more device left, show the exception now
dev.log.exception('while waiting')
continue
if not done:
# we found one busy dev, normally go to next iteration
# until this one is done (saves going through the whole
# list of devices and doing unnecessary HW communication)
if loops % 10:
break
# every 10 loops, go through everything to get an accurate
# display in the action line
continue
if dev in devices:
# populate the results dictionary, but only with the values
# of excplicitly given devices
values[dev] = dev.read()
# this device is done: don't wait for it anymore
devlist.remove(dev)
target_str = get_target_str()
session.action(eta_str + target_str)
if devlist:
if eta_update >= 1:
eta_update -= 1
now = currenttime()
eta = {dev.estimateTime(now - first_ts) for dev in devlist}
eta.discard(None)
# use max here as we wait for ALL movements to finish
eta_str = ('estimated %s left / ' %
formatDuration(max(eta)) if eta else '')
session.action(eta_str + target_str)
session.delay(delay)
eta_update += delay
if final_exc:
reraise(*final_exc)
finally:
session.endActionScope()
session.log.debug('multiWait: finished')
return values
