/usr/lib/python2.7/dist-packages/PyTango/connection.py is in python-pytango 8.1.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# This file is part of PyTango (http://www.tinyurl.com/PyTango)
#
# Copyright 2006-2012 CELLS / ALBA Synchrotron, Bellaterra, Spain
# Copyright 2013-2014 European Synchrotron Radiation Facility, Grenoble, France
#
# Distributed under the terms of the GNU Lesser General Public License,
# either version 3 of the License, or (at your option) any later version.
# See LICENSE.txt for more info.
# ------------------------------------------------------------------------------
"""
This is an internal PyTango module.
"""
__all__ = ["connection_init"]
__docformat__ = "restructuredtext"
import operator
import collections
from ._PyTango import Connection, DeviceData, __CallBackAutoDie, CmdArgType, \
DeviceProxy, Database, ExtractAs
from .utils import document_method as __document_method
from .utils import document_static_method as __document_static_method
from .green import green
def __CallBackAutoDie__cmd_ended_aux(self, fn):
def __new_fn(cmd_done_event):
try:
cmd_done_event.argout = cmd_done_event.argout_raw.extract(
self.defaultCommandExtractAs)
except Exception:
pass
return fn(cmd_done_event)
return __new_fn
def __get_command_inout_param(self, cmd_name, cmd_param=None):
if cmd_param is None:
return DeviceData()
if isinstance(cmd_param, DeviceData):
return cmd_param
if isinstance(self, DeviceProxy):
# This is not part of 'Connection' interface, but
# DeviceProxy only.
info = self.command_query(cmd_name)
param = DeviceData()
param.insert(info.in_type, cmd_param)
return param
elif isinstance(self, Database):
# I just try to guess types DevString and DevVarStringArray
# as they are used for Database
param = DeviceData()
if isinstance(cmd_param, str):
param.insert(CmdArgType.DevString, cmd_param)
return param
elif isinstance(cmd_param, collections.Sequence) and all([isinstance(x,str) for x in cmd_param]):
param.insert(CmdArgType.DevVarStringArray, cmd_param)
return param
else:
raise TypeError("command_inout() parameter must be a DeviceData object or a string or a sequence of strings")
else:
raise TypeError("command_inout() parameter must be a DeviceData object.")
def __Connection__command_inout(self, name, *args, **kwds):
"""
command_inout( self, cmd_name, cmd_param=None, green_mode=None, wait=True, timeout=None) -> any
Execute a command on a device.
Parameters :
- cmd_name : (str) Command name.
- cmd_param : (any) It should be a value of the type expected by the
command or a DeviceData object with this value inserted.
It can be ommited if the command should not get any argument.
- green_mode : (GreenMode) Defaults to the current DeviceProxy GreenMode.
(see :meth:`~PyTango.DeviceProxy.get_green_mode` and
:meth:`~PyTango.DeviceProxy.set_green_mode`).
- wait : (bool) whether or not to wait for result. If green_mode
is *Synchronous*, this parameter is ignored as it always
waits for the result.
Ignored when green_mode is Synchronous (always waits).
- timeout : (float) The number of seconds to wait for the result.
If None, then there is no limit on the wait time.
Ignored when green_mode is Synchronous or wait is False.
Return : The result of the command. The type depends on the command. It may be None.
Throws : ConnectionFailed, CommunicationFailed, DeviceUnlocked, DevFailed from device
TimeoutError (green_mode == Futures) If the future didn't finish executing before the given timeout.
Timeout (green_mode == Gevent) If the async result didn't finish executing before the given timeout.
.. versionadded:: 8.1.0
*green_mode* parameter.
*wait* parameter.
*timeout* parameter.
"""
r = Connection.command_inout_raw(self, name, *args, **kwds)
if isinstance(r, DeviceData):
try:
return r.extract(self.defaultCommandExtractAs)
except Exception:
return None
else:
return r
__Connection__command_inout.__name__ = "command_inout"
def __Connection__command_inout_raw(self, cmd_name, cmd_param = None):
"""
command_inout_raw( self, cmd_name, cmd_param=None) -> DeviceData
Execute a command on a device.
Parameters :
- cmd_name : (str) Command name.
- cmd_param : (any) It should be a value of the type expected by the
command or a DeviceData object with this value inserted.
It can be ommited if the command should not get any argument.
Return : A DeviceData object.
Throws : ConnectionFailed, CommunicationFailed, DeviceUnlocked, DevFailed from device
"""
param = __get_command_inout_param(self, cmd_name, cmd_param)
return self.__command_inout(cmd_name, param)
def __Connection__command_inout_asynch(self, cmd_name, *args):
"""
command_inout_asynch(self, cmd_name) -> id
command_inout_asynch(self, cmd_name, cmd_param) -> id
command_inout_asynch(self, cmd_name, cmd_param, forget) -> id
Execute asynchronously (polling model) a command on a device
Parameters :
- cmd_name : (str) Command name.
- cmd_param : (any) It should be a value of the type expected by the
command or a DeviceData object with this value inserted.
It can be ommited if the command should not get any argument.
If the command should get no argument and you want
to set the 'forget' param, use None for cmd_param.
- forget : (bool) If this flag is set to true, this means that the client
does not care at all about the server answer and will even
not try to get it. Default value is False. Please,
note that device re-connection will not take place (in case
it is needed) if the fire and forget mode is used. Therefore,
an application using only fire and forget requests is not able
to automatically re-connnect to device.
Return : (int) This call returns an asynchronous call identifier which is
needed to get the command result (see command_inout_reply)
Throws : ConnectionFailed, TypeError, anything thrown by command_query
command_inout_asynch( self, cmd_name, callback) -> None
command_inout_asynch( self, cmd_name, cmd_param, callback) -> None
Execute asynchronously (callback model) a command on a device.
Parameters :
- cmd_name : (str) Command name.
- cmd_param : (any)It should be a value of the type expected by the
command or a DeviceData object with this value inserted.
It can be ommited if the command should not get any argument.
- callback : Any callable object (function, lambda...) or any oject
with a method named "cmd_ended".
Return : None
Throws : ConnectionFailed, TypeError, anything thrown by command_query
.. important::
by default, TANGO is initialized with the **polling** model. If you want
to use the **push** model (the one with the callback parameter), you
need to change the global TANGO model to PUSH_CALLBACK.
You can do this with the :meth:`PyTango.ApiUtil.set_asynch_cb_sub_model`
"""
if len(args) == 0: # command_inout_asynch()
argin = DeviceData()
forget = False
return self.__command_inout_asynch_id(cmd_name, argin, forget)
elif len(args) == 1:
if isinstance(args[0], collections.Callable): # command_inout_asynch(lambda)
cb = __CallBackAutoDie()
cb.cmd_ended = __CallBackAutoDie__cmd_ended_aux(self, args[0])
argin = __get_command_inout_param(self, cmd_name)
return self.__command_inout_asynch_cb(cmd_name, argin, cb)
elif hasattr(args[0], 'cmd_ended'): # command_inout_asynch(Cbclass)
cb = __CallBackAutoDie()
cb.cmd_ended = __CallBackAutoDie__cmd_ended_aux(self, args[0].cmd_ended)
argin = __get_command_inout_param(self, cmd_name)
return self.__command_inout_asynch_cb(cmd_name, argin, cb)
else: # command_inout_asynch(value)
argin = __get_command_inout_param(self, cmd_name, args[0])
forget = False
return self.__command_inout_asynch_id(cmd_name, argin, forget)
elif len(args) == 2:
if isinstance(args[1], collections.Callable): #command_inout_asynch( value, lambda)
cb = __CallBackAutoDie()
cb.cmd_ended = __CallBackAutoDie__cmd_ended_aux(self, args[1])
argin = __get_command_inout_param(self, cmd_name, args[0])
return self.__command_inout_asynch_cb(cmd_name, argin, cb)
elif hasattr(args[1], 'cmd_ended'): #command_inout_asynch(value, cbClass)
cb = __CallBackAutoDie()
cb.cmd_ended = __CallBackAutoDie__cmd_ended_aux(self, args[1].cmd_ended)
argin = __get_command_inout_param(self, cmd_name, args[0])
return self.__command_inout_asynch_cb(cmd_name, argin, cb)
else: # command_inout_asynch(value, forget)
argin = __get_command_inout_param(self, cmd_name, args[0])
forget = bool(args[1])
return self.__command_inout_asynch_id(cmd_name, argin, forget)
else:
raise TypeError("Wrong number of attributes!")
__Connection__command_inout_asynch.__name__ = "command_inout_asynch"
def __Connection__command_inout_reply(self, idx, timeout=None):
"""
command_inout_reply(self, id) -> DeviceData
Check if the answer of an asynchronous command_inout is arrived
(polling model). If the reply is arrived and if it is a valid
reply, it is returned to the caller in a DeviceData object. If
the reply is an exception, it is re-thrown by this call. An
exception is also thrown in case of the reply is not yet arrived.
Parameters :
- id : (int) Asynchronous call identifier.
Return : (DeviceData)
Throws : AsynCall, AsynReplyNotArrived, CommunicationFailed, DevFailed from device
command_inout_reply(self, id, timeout) -> DeviceData
Check if the answer of an asynchronous command_inout is arrived
(polling model). id is the asynchronous call identifier. If the
reply is arrived and if it is a valid reply, it is returned to
the caller in a DeviceData object. If the reply is an exception,
it is re-thrown by this call. If the reply is not yet arrived,
the call will wait (blocking the process) for the time specified
in timeout. If after timeout milliseconds, the reply is still
not there, an exception is thrown. If timeout is set to 0, the
call waits until the reply arrived.
Parameters :
- id : (int) Asynchronous call identifier.
- timeout : (int)
Return : (DeviceData)
Throws : AsynCall, AsynReplyNotArrived, CommunicationFailed, DevFailed from device
"""
if timeout is None:
r = self.command_inout_reply_raw(idx)
else:
r = self.command_inout_reply_raw(idx, timeout)
if isinstance(r, DeviceData):
try:
return r.extract(self.defaultCommandExtractAs)
except Exception:
return None
else:
return r
__Connection__command_inout_reply.__name__ = "command_inout_reply"
def __init_Connection():
Connection.defaultCommandExtractAs = ExtractAs.Numpy
Connection.command_inout_raw = __Connection__command_inout_raw
Connection.command_inout = green(__Connection__command_inout)
Connection.command_inout_asynch = __Connection__command_inout_asynch
Connection.command_inout_reply = __Connection__command_inout_reply
def __doc_Connection():
def document_method(method_name, desc, append=True):
return __document_method(Connection, method_name, desc, append)
def document_static_method(method_name, desc, append=True):
return __document_static_method(Connection, method_name, desc, append)
Connection.__doc__ = """
The abstract Connection class for DeviceProxy. Not to be initialized directly.
"""
document_method("dev_name", """
dev_name(self) -> str
Return the device name as it is stored locally
Parameters : None
Return : (str)
""")
document_method("get_db_host", """
get_db_host(self) -> str
Returns a string with the database host.
Parameters : None
Return : (str)
New in PyTango 7.0.0
""")
document_method("get_db_port", """
get_db_port(self) -> str
Returns a string with the database port.
Parameters : None
Return : (str)
New in PyTango 7.0.0
""")
document_method("get_db_port_num", """
get_db_port_num(self) -> int
Returns an integer with the database port.
Parameters : None
Return : (int)
New in PyTango 7.0.0
""")
document_method("get_from_env_var", """
get_from_env_var(self) -> bool
Returns True if determined by environment variable or
False otherwise
Parameters : None
Return : (bool)
New in PyTango 7.0.0
""")
document_method("connect", """
connect(self, corba_name) -> None
Creates a connection to a TANGO device using it's stringified
CORBA reference i.e. IOR or corbaloc.
Parameters :
- corba_name : (str) Name of the CORBA object
Return : None
New in PyTango 7.0.0
""")
document_method("reconnect", """
reconnect(self, db_used) -> None
Reconnecto to a CORBA object.
Parameters :
- db_used : (bool) Use thatabase
Return : None
New in PyTango 7.0.0
""")
document_method("get_idl_version", """
get_idl_version(self) -> int
Get the version of the Tango Device interface implemented
by the device
Parameters : None
Return : (int)
""")
document_method("set_timeout_millis", """
set_timeout_millis(self, timeout) -> None
Set client side timeout for device in milliseconds. Any method
which takes longer than this time to execute will throw an
exception
Parameters :
- timeout : integer value of timeout in milliseconds
Return : None
Example :
dev.set_timeout_millis(1000)
""")
document_method("get_timeout_millis", """
get_timeout_millis(self) -> int
Get the client side timeout in milliseconds
Parameters : None
Return : (int)
""")
document_method("get_source", """
get_source(self) -> DevSource
Get the data source(device, polling buffer, polling buffer
then device) used by command_inout or read_attribute methods
Parameters : None
Return : (DevSource)
Example :
source = dev.get_source()
if source == DevSource.CACHE_DEV : ...
""")
document_method("set_source", """
set_source(self, source) -> None
Set the data source(device, polling buffer, polling buffer
then device) for command_inout and read_attribute methods.
Parameters :
- source: (DevSource) constant.
Return : None
Example :
dev.set_source(DevSource.CACHE_DEV)
""")
document_method("get_transparency_reconnection", """
get_transparency_reconnection(self) -> bool
Returns the device transparency reconnection flag.
Parameters : None
Return : (bool) True if transparency reconnection is set
or False otherwise
""")
document_method("set_transparency_reconnection", """
set_transparency_reconnection(self, yesno) -> None
Set the device transparency reconnection flag
Parameters :
" - val : (bool) True to set transparency reconnection
" or False otherwise
Return : None
""")
document_method("command_inout_reply_raw", """
command_inout_reply_raw(self, id) -> DeviceData
Check if the answer of an asynchronous command_inout is arrived
(polling model). If the reply is arrived and if it is a valid
reply, it is returned to the caller in a DeviceData object. If
the reply is an exception, it is re-thrown by this call. An
exception is also thrown in case of the reply is not yet arrived.
Parameters :
- id : (int) Asynchronous call identifier.
Return : (DeviceData)
Throws : AsynCall, AsynReplyNotArrived, CommunicationFailed, DevFailed from device
""")
document_method("command_inout_reply_raw", """
command_inout_reply_raw(self, id, timeout) -> DeviceData
Check if the answer of an asynchronous command_inout is arrived
(polling model). id is the asynchronous call identifier. If the
reply is arrived and if it is a valid reply, it is returned to
the caller in a DeviceData object. If the reply is an exception,
it is re-thrown by this call. If the reply is not yet arrived,
the call will wait (blocking the process) for the time specified
in timeout. If after timeout milliseconds, the reply is still
not there, an exception is thrown. If timeout is set to 0, the
call waits until the reply arrived.
Parameters :
- id : (int) Asynchronous call identifier.
- timeout : (int)
Return : (DeviceData)
Throws : AsynCall, AsynReplyNotArrived, CommunicationFailed, DevFailed from device
""")
#//
#// Asynchronous methods
#//
document_method("get_asynch_replies", """
get_asynch_replies(self) -> None
Try to obtain data returned by a command asynchronously
requested. This method does not block if the reply has not yet
arrived. It fires callback for already arrived replies.
Parameters : None
Return : None
New in PyTango 7.0.0
""")
document_method("get_asynch_replies", """
get_asynch_replies(self, call_timeout) -> None
Try to obtain data returned by a command asynchronously
requested. This method blocks for the specified timeout if the
reply is not yet arrived. This method fires callback when the
reply arrived. If the timeout is set to 0, the call waits
undefinitely for the reply
Parameters :
- call_timeout : (int) timeout in miliseconds
Return : None
New in PyTango 7.0.0
""")
document_method("cancel_asynch_request", """
cancel_asynch_request(self, id ) -> None
Cancel a running asynchronous request
This is a client side call. Obviously, the call cannot be
aborted while it is running in the device.
Parameters :
- id : The asynchronous call identifier
Return : None
New in PyTango 7.0.0
""")
document_method("cancel_all_polling_asynch_request", """
cancel_all_polling_asynch_request(self) -> None
Cancel all running asynchronous request
This is a client side call. Obviously, the calls cannot be
aborted while it is running in the device.
Parameters : None
Return : None
New in PyTango 7.0.0
""")
#//
#// Control access related methods
#//
document_method("get_access_control", """
get_access_control(self) -> AccessControlType
Returns the current access control type
Parameters : None
Return : (AccessControlType) The current access control type
New in PyTango 7.0.0
""")
document_method("set_access_control", """
set_access_control(self, acc) -> None
Sets the current access control type
Parameters :
- acc: (AccessControlType) the type of access
control to set
Return : None
New in PyTango 7.0.0
""")
document_method("get_access_right", """
get_access_right(self) -> AccessControlType
Returns the current access control type
Parameters : None
Return : (AccessControlType) The current access control type
New in PyTango 8.0.0
""")
document_static_method("get_fqdn", """
get_fqdn(self) -> str
Returns the fully qualified domain name
Parameters : None
Return : (str) the fully qualified domain name
New in PyTango 7.2.0
""")
document_method("is_dbase_used", """
is_dbase_used(self) -> bool
Returns if the database is being used
Parameters : None
Return : (bool) True if the database is being used
New in PyTango 7.2.0
""")
document_method("get_dev_host", """
get_dev_host(self) -> str
Returns the current host
Parameters : None
Return : (str) the current host
New in PyTango 7.2.0
""")
document_method("get_dev_port", """
get_dev_port(self) -> str
Returns the current port
Parameters : None
Return : (str) the current port
New in PyTango 7.2.0
""")
def connection_init(doc=True):
__init_Connection()
if doc:
__doc_Connection()
|