def test_get_callback(self):
write("Callback test: changing PV must be updated\n")
global NEWVALS
mypv = PV(pvnames.updating_pv1)
NEWVALS = []
def onChanges(pvname=None, value=None, char_value=None, **kw):
write('PV %s %s, %s Changed!\n' % (pvname, repr(value), char_value))
NEWVALS.append(repr(value))
mypv.add_callback(onChanges)
write('Added a callback. Now wait for changes...\n')
t0 = time.time()
while time.time() - t0 < 3:
time.sleep(1.e-4)
write(' saw %i changes.\n' % len(NEWVALS))
assert len(NEWVALS) > 3
mypv.clear_callbacks()
def test_thread_pv(threading_broadcaster):
from caproto.threading.client import Context, PV
pv1 = "XF:31IDA-OP{Tbl-Ax:X1}Mtr.VAL"
# pv2 = "XF:31IDA-OP{Tbl-Ax:X2}Mtr.VAL"
# Some user function to call when subscriptions receive data.
called = []
def user_callback(*, value, **kwargs):
print()
print('-- user callback', value)
called.append(True)
ctx = Context(threading_broadcaster, log_level='DEBUG')
ctx.register()
time_pv = PV(pv1, context=ctx, form='time')
ctrl_pv = PV(pv1, context=ctx, form='ctrl')
time_pv.wait_for_connection()
time_pv.add_callback(user_callback)
print('time read', time_pv.get())
print('ctrl read', ctrl_pv.get())
time_pv.put(3, wait=True)
time_pv.put(6, wait=True)
time.sleep(0.1)
assert time_pv.get() == 6
assert called
print('read', time_pv.get())
print('done')
repr(time_pv)
for k, v in PV.__dict__.items():
if isinstance(v, property):
getattr(time_pv, k)
getattr(ctrl_pv, k)
def test_waveform_callback_with_count_arg(self):
values = []
wf = PV(pvnames.char_arr_pv, count=32)
def onChanges(pvname=None, value=None, char_value=None, **kw):
write( 'PV %s %s, %s Changed!\n' % (pvname, repr(value), char_value))
values.append( value)
wf.add_callback(onChanges)
write('Added a callback. Now wait for changes...\n')
t0 = time.time()
while time.time() - t0 < 3:
time.sleep(1.e-4)
if len(values)>0:
break
self.failUnless(len(values) > 0)
self.assertEquals(len(values[0]),32)
wf.clear_callbacks()