Table of Contents
Name | Direction | Type | Default | Description |
---|---|---|---|---|
NPeriods | Input | number | 1 | Number of periods. |
NSpectra | Input | number | 100 | Number of spectra. |
NBins | Input | number | 30 | Number of bins. |
Port | Input | number | 56789 | The port to broadcast on (default 56789, ISISDAE 6789). |
Simulates ISIS histogram DAE. It runs continuously until canceled and listens to port 6789 for ISIS DAE commands.
Data is generated starting at 10000 microseconds Time of flight, and each bin requested covers 100 microseconds. The algorithm silently defines three additional spectra with numbers NSpectra+1, NSpectra+2 and NSpectra+3 in a different time regime (they have different binning to the rest of the spectra).
Example:
from threading import Thread
import time
def startFakeHistoDAE():
# This will generate 100 spectra with 100 bins
try:
FakeISISHistoDAE(NPeriods=1,NSpectra=100,nBins=100)
except RuntimeError:
pass
def captureLive():
ConfigService.setFacility("TEST_LIVE")
try:
# start a Live data listener updating every second, that rebins the data
# and replaces the results each time with those of the last second.
StartLiveData(Instrument='ISIS_Histogram', OutputWorkspace='wsOut', UpdateEvery=1,
AccumulationMethod='Replace')
# give it a couple of seconds before stopping it
time.sleep(2)
finally:
# This will cancel both algorithms
# you can do the same in the GUI
# by clicking on the details button on the bottom right
AlgorithmManager.newestInstanceOf("MonitorLiveData").cancel()
AlgorithmManager.newestInstanceOf("FakeISISHistoDAE").cancel()
time.sleep(1)
#--------------------------------------------------------------------------------------------------
oldFacility = ConfigService.getFacility().name()
thread = Thread(target = startFakeHistoDAE)
thread.start()
time.sleep(2) # give it a small amount of time to get ready
if not thread.is_alive():
raise RuntimeError("Unable to start FakeDAE")
try:
captureLive()
except:
print("Error occurred starting live data")
finally:
thread.join() # this must get hit
# put back the facility
ConfigService.setFacility(oldFacility)
#get the output workspace
wsOut = mtd["wsOut"]
print("The workspace contains %i histograms" % wsOut.getNumberHistograms())
Output:
The workspace contains 100 histograms
Categories: AlgorithmIndex | DataHandling\DataAcquisition
C++ source: FakeISISHistoDAE.cpp (last modified: 2019-07-17)
C++ header: FakeISISHistoDAE.h (last modified: 2018-10-05)