def test_curio_server_example(prefix, run_client):
import caproto.curio.client as client
from caproto.ioc_examples.type_varieties import (pvdb)
from caproto.curio.server import ServerExit, start_server as server_main
pvdb = {prefix + key: value for key, value in pvdb.items()}
pi_pv = prefix + 'int'
broadcaster = client.SharedBroadcaster()
ctx = client.Context(broadcaster)
async def connect():
await broadcaster.register()
await ctx.search(pi_pv)
print('done searching')
chan1 = await ctx.create_channel(pi_pv)
# ...and then wait for all the responses.
await chan1.wait_for_connection()
return chan1
async def task():
async def server_wrapper():
try:
await server_main(pvdb)
except ServerExit:
print('Server exited normally')
try:
server_task = await curio.spawn(server_wrapper)
await curio.sleep(1) # Give server some time to start up.
chan1 = await connect()
await run_client(chan1, pvdb, ctx)
await chan1.disconnect()
print('client is done')
finally:
try:
await server_task.cancel()
await server_task.join()
except curio.KernelExit:
print('Server exited normally')
with curio.Kernel() as kernel:
kernel.run(task)
print('done')
def _test_ioc_examples(request,
module_name,
pvdb_class_name,
class_kwargs,
prefix,
async_lib='curio'):
from .conftest import run_example_ioc
from caproto.sync.client import read, write
from caproto.server import PvpropertyReadOnlyData
import subprocess
module = __import__(module_name,
fromlist=(module_name.rsplit('.', 1)[-1], ))
pvdb_class = getattr(module, pvdb_class_name)
print(f'Prefix: {prefix} PVDB class: {pvdb_class}')
pvdb = pvdb_class(prefix=prefix, **class_kwargs).pvdb
pvs = list(pvdb.keys())
pv_to_check = pvs[0]
print(f'PVs:', pvs)
print(f'PV to check: {pv_to_check}')
stdin = (subprocess.DEVNULL if 'io_interrupt' in module_name else None)
print('stdin=', stdin)
run_example_ioc(module_name,
request=request,
args=['--prefix', prefix, '--async-lib', async_lib],
pv_to_check=pv_to_check,
stdin=stdin)
print(f'{module_name} IOC now running')
put_values = [
(PvpropertyReadOnlyData, None),
(ca.ChannelNumeric, [1]),
(ca.ChannelString, ['USD']),
]
skip_pvs = [('ophyd', ':exit')]
def find_put_value(pv):
'Determine value to write to pv'
for skip_ioc, skip_suffix in skip_pvs:
if skip_ioc in module_name:
if pv.endswith(skip_suffix):
return None
for put_class, put_value in put_values:
if isinstance(channeldata, put_class):
return put_value
else:
raise Exception('Failed to set default value for channeldata:'
f'{channeldata.__class__}')
for pv, channeldata in pvdb.items():
value = find_put_value(pv)
if value is None:
print(f'Skipping write to {pv}')
continue
print(f'Writing {value} to {pv}')
write(pv, value)
value = read(pv)
print(f'Read {pv} = {value}')