def _execute_rpc(self, request):
method = pvaccess.PvObject({'method': pvaccess.STRING})
method.set({'method': request.path[1]})
# Connect to the channel and create the RPC client
rpc = pvaccess.RpcClient(request.path[0], method)
# Construct the pv object from the parameters
params = dict_to_pv_object(request.parameters)
# Call the method on the RPC object
value = rpc.invoke(params)
# Now create the Return object and populate it with the response
d = strip_tuples(value.toDict(True))
response = self._response_from_dict(request, d)
return response
def get_full_machine_model(use_design=False):
if not PVACCESS_AVAILABLE:
raise NoPVAccessException
request = pvaccess.PvObject(OrderedDict([('scheme', pvaccess.STRING), ('path', pvaccess.STRING)]), 'epics:nt/NTURI:1.0')
model_type = "EXTANT"
if use_design:
model_type = "DESIGN"
path = "MODEL:RMATS:{}:FULLMACHINE".format(model_type)
rpc = pvaccess.RpcClient(path)
request.set(OrderedDict([('scheme', 'pva'), ('path', path)]))
response = rpc.invoke(request).getStructure()
m = np.zeros(len(response['ELEMENT_NAME']), dtype=[('ordinal', 'i16'),('element_name', 'a60'), ('epics_channel_access_name', 'a60'), ('position_index', 'a6'), ('z_position', 'float32'), ('r_mat', 'float32', (6,6))])
m['ordinal'] = response['ORDINAL']
m['element_name'] = response['ELEMENT_NAME']
m['epics_channel_access_name'] = response['EPICS_CHANNEL_ACCESS_NAME']
m['position_index'] = response['POSITION_INDEX']
m['z_position'] = response['Z_POSITION']
m['r_mat'] = np.reshape(np.array([response['R11'], response['R12'], response['R13'], response['R14'], response['R15'], response['R16'], response['R21'], response['R22'], response['R23'], response['R24'], response['R25'], response['R26'], response['R31'], response['R32'], response['R33'], response['R34'], response['R35'], response['R36'], response['R41'], response['R42'], response['R43'], response['R44'], response['R45'], response['R46'], response['R51'], response['R52'], response['R53'], response['R54'], response['R55'], response['R56'], response['R61'], response['R62'], response['R63'], response['R64'], response['R65'], response['R66']]).T, (-1,6,6))
return m
def execute_rpc(self, request):
method = pvaccess.PvObject({'method': pvaccess.STRING})
method.set({'method': request["endpoint"][1]})
# Connect to the channel and create the RPC client
rpc = pvaccess.RpcClient(request["endpoint"][0], method)
# Construct the pv object from the parameters
params = self.dict_to_pv_object(request["parameters"])
self.log_debug("PvObject parameters: %s", params)
# Call the method on the RPC object
response = rpc.invoke(params)
self.log_debug("Response: %s", response)
# Now create the Return object and populate it with the response
value = response.toDict(True)
if 'typeid' in value:
if value['typeid'] == 'malcolm:core/Error:1.0':
return_object = Error(id_=request["id"], message=value['message'])
else:
return_object = Return(id_=request["id"], value=value)
else:
return_object = Error(id_=request["id"], message="No valid return typeid")
return return_object
def _get_rpc_client(self, ch_name):
"""Get pvAccess RPC Client
Parameters
----------
ch_name : str
pvAccess channel name
Returns
-------
pvaccess.RpcClient
pvAccess RPC Client for channel name
"""
self._check_ch_name(ch_name)
name = str(ch_name)
with self._lock:
if name not in self._clients:
self._clients[name] = pva.RpcClient(name)
client = self._clients[name]
return client
def __init__(self, channelname = 'masarService'):
"""
masar service client library. Default channel name is masarService.
"""
#self.channelname = channelname
self.rpc = pvaccess.RpcClient(channelname)
#!/usr/bin/env python
import pvaccess
import random
rpc = pvaccess.RpcClient('createNtTable')
request = pvaccess.PvObject({'nRows' : pvaccess.INT, 'nColumns' : pvaccess.INT})
request.set({'nRows' : 10, 'nColumns' : 10})
print "Sending request for createNtTable:"
print request
print "Got response:"
response = rpc.invoke(request)
print response
print "Converting to NtTable:"
ntTable = pvaccess.NtTable(response)
print ntTable
print "Get column 3:"
print ntTable.getColumn(3)
print "Get descriptor:"
print ntTable.getDescriptor()
from pvaccess import PvObject, STRING, DOUBLE, NtTable
import pvaccess
pvObject = PvObject({
'labels': [STRING],
'value': {
'column0': [DOUBLE],
'column1': [DOUBLE],
'column2': [DOUBLE]
}
})
pvObject.setScalarArray('labels', ['x', 'y', 'z'])
pvObject.setStructure(
'value', {
'column0': [0.1, 0.2, 0.3],
'column1': [1.1, 1.2, 1.3],
'column2': [2.1, 2.2, 2.3]
})
table3 = NtTable(pvObject)
print table3
rpc = pvaccess.RpcClient('table')
request = table3
rpc.invoke(request)