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various fixes

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- nodestatechange callback must appear after the online attribute
  is changed
- IntRange: move range validation outside of try except
- fixes on some error names
- well defined error message 'no such class' in secop.lib.get_class
- try again 4 times when starting Tcp Server on EADDRINUSE
- fix error handling

Change-Id: I4eee9b79ea8173936b9f5193b87e006ac8fca827
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/26171
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>
This commit is contained in:
zolliker 2021-06-08 18:02:52 +02:00
parent 026e657799
commit 9a60de9c1c
9 changed files with 69 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
secop/client/__init__.py
View File

@ -493,14 +493,12 @@ class SecopClient(ProxyClient):
self.log.warning('unhandled message: %s %s %r' % (action, ident, data))
def _set_state(self, online, state=None):
# treat reconnecting as online!
state = state or self.state
self.callback(None, 'nodeStateChange', online, state)
for mname in self.modules:
self.callback(mname, 'nodeStateChange', online, state)
# set online attribute after callbacks -> callback may check for old state
# remark: reconnecting is treated as online
self.online = online
self.state = state
self.state = state or self.state
self.callback(None, 'nodeStateChange', self.online, self.state)
for mname in self.modules:
self.callback(mname, 'nodeStateChange', self.online, self.state)
def queue_request(self, action, ident=None, data=None):
"""make a request"""

34
secop/datatypes.py
View File

@ -102,7 +102,7 @@ class DataType(HasProperties):
self.setProperty(k, v)
self.checkProperties()
except Exception as e:
raise ProgrammingError(str(e))
raise ProgrammingError(str(e)) from None
def get_info(self, **kwds):
"""prepare dict for export or repr
@ -194,7 +194,7 @@ class FloatRange(DataType):
try:
value = float(value)
except Exception:
raise BadValueError('Can not __call__ %r to float' % value)
raise BadValueError('Can not __call__ %r to float' % value) from None
# map +/-infty to +/-max possible number
value = clamp(-sys.float_info.max, value, sys.float_info.max)
@ -267,12 +267,12 @@ class IntRange(DataType):
try:
fvalue = float(value)
value = int(value)
except Exception:
raise BadValueError('Can not convert %r to int' % value) from None
if not self.min <= value <= self.max or round(fvalue) != fvalue:
raise BadValueError('%r should be an int between %d and %d' %
(value, self.min, self.max))
return value
except Exception:
raise BadValueError('Can not convert %r to int' % value)
def __repr__(self):
args = (self.min, self.max)
@ -371,7 +371,7 @@ class ScaledInteger(DataType):
try:
value = float(value)
except Exception:
raise BadValueError('Can not convert %r to float' % value)
raise BadValueError('Can not convert %r to float' % value) from None
prec = max(self.scale, abs(value * self.relative_resolution),
self.absolute_resolution)
if self.min - prec <= value <= self.max + prec:
@ -454,7 +454,7 @@ class EnumType(DataType):
try:
return self._enum[value]
except (KeyError, TypeError): # TypeError will be raised when value is not hashable
raise BadValueError('%r is not a member of enum %r' % (value, self._enum))
raise BadValueError('%r is not a member of enum %r' % (value, self._enum)) from None
def from_string(self, text):
return self(text)
@ -533,7 +533,7 @@ class BLOBType(DataType):
if self.minbytes < other.minbytes or self.maxbytes > other.maxbytes:
raise BadValueError('incompatible datatypes')
except AttributeError:
raise BadValueError('incompatible datatypes')
raise BadValueError('incompatible datatypes') from None
class StringType(DataType):
@ -572,7 +572,7 @@ class StringType(DataType):
try:
value.encode('ascii')
except UnicodeEncodeError:
raise BadValueError('%r contains non-ascii character!' % value)
raise BadValueError('%r contains non-ascii character!' % value) from None
size = len(value)
if size < self.minchars:
raise BadValueError(
@ -606,7 +606,7 @@ class StringType(DataType):
self.isUTF8 > other.isUTF8:
raise BadValueError('incompatible datatypes')
except AttributeError:
raise BadValueError('incompatible datatypes')
raise BadValueError('incompatible datatypes') from None
# TextType is a special StringType intended for longer texts (i.e. embedding \n),
@ -618,7 +618,7 @@ class TextType(StringType):
def __init__(self, maxchars=None):
if maxchars is None:
maxchars = UNLIMITED
super(TextType, self).__init__(0, maxchars)
super().__init__(0, maxchars)
def __repr__(self):
if self.maxchars == UNLIMITED:
@ -771,7 +771,7 @@ class ArrayOf(DataType):
raise BadValueError('incompatible datatypes')
self.members.compatible(other.members)
except AttributeError:
raise BadValueError('incompatible datatypes')
raise BadValueError('incompatible datatypes') from None
class TupleOf(DataType):
@ -811,7 +811,7 @@ class TupleOf(DataType):
return tuple(sub(elem)
for sub, elem in zip(self.members, value))
except Exception as exc:
raise BadValueError('Can not validate:', str(exc))
raise BadValueError('Can not validate:', str(exc)) from None
def export_value(self, value):
"""returns a python object fit for serialisation"""
@ -894,7 +894,7 @@ class StructOf(DataType):
return ImmutableDict((str(k), self.members[k](v))
for k, v in list(value.items()))
except Exception as exc:
raise BadValueError('Can not validate %s: %s' % (repr(value), str(exc)))
raise BadValueError('Can not validate %s: %s' % (repr(value), str(exc))) from None
def export_value(self, value):
"""returns a python object fit for serialisation"""
@ -924,7 +924,7 @@ class StructOf(DataType):
if mandatory:
raise BadValueError('incompatible datatypes')
except (AttributeError, TypeError, KeyError):
raise BadValueError('incompatible datatypes')
raise BadValueError('incompatible datatypes') from None
class CommandType(DataType):
@ -987,7 +987,7 @@ class CommandType(DataType):
if self.result != other.result: # not both are None
other.result.compatible(self.result)
except AttributeError:
raise BadValueError('incompatible datatypes')
raise BadValueError('incompatible datatypes') from None
# internally used datatypes (i.e. only for programming the SEC-node)
@ -1164,9 +1164,9 @@ def get_datatype(json, pname=''):
kwargs = json.copy()
base = kwargs.pop('type')
except (TypeError, KeyError, AttributeError):
raise BadValueError('a data descriptor must be a dict containing a "type" key, not %r' % json)
raise BadValueError('a data descriptor must be a dict containing a "type" key, not %r' % json) from None
try:
return DATATYPES[base](pname=pname, **kwargs)
except Exception as e:
raise BadValueError('invalid data descriptor: %r (%s)' % (json, str(e)))
raise BadValueError('invalid data descriptor: %r (%s)' % (json, str(e))) from None

5
secop/errors.py
View File

@ -143,7 +143,7 @@ EXCEPTIONS = dict(
NoSuchCommand=NoSuchCommandError,
CommandFailed=CommandFailedError,
CommandRunning=CommandRunningError,
Readonly=ReadOnlyError,
ReadOnly=ReadOnlyError,
BadValue=BadValueError,
CommunicationFailed=CommunicationFailedError,
HardwareError=HardwareError,
@ -151,7 +151,8 @@ EXCEPTIONS = dict(
IsError=IsErrorError,
Disabled=DisabledError,
SyntaxError=ProtocolError,
NotImplementedError=NotImplementedError,
NotImplemented=NotImplementedError,
ProtocolError=ProtocolError,
InternalError=InternalError,
# internal short versions (candidates for spec)
Protocol=ProtocolError,

3
secop/lib/__init__.py
View File

@ -105,7 +105,10 @@ def get_class(spec):
else:
# rarely needed by now....
module = importlib.import_module('secop.' + modname)
try:
return getattr(module, classname)
except AttributeError:
raise AttributeError('no such class') from None
def mkthread(func, *args, **kwds):

7
secop/modules.py
View File

@ -99,9 +99,12 @@ class HasAccessibles(HasProperties):
rfunc_handler = pobj.handler.get_read_func(cls, pname) if pobj.handler else None
wrapped = hasattr(rfunc, '__wrapped__')
if rfunc_handler:
if rfunc and not wrapped:
if 'read_' + pname in cls.__dict__:
if pname in cls.__dict__:
raise ProgrammingError("parameter '%s' can not have a handler "
"and read_%s" % (pname, pname))
# read_<pname> overwrites inherited handler
else:
rfunc = rfunc_handler
wrapped = False
@ -388,7 +391,7 @@ class Module(HasAccessibles):
if k in self.parameters or k in self.propertyDict:
setattr(self, k, v)
cfgdict.pop(k)
except (ValueError, TypeError):
except (ValueError, TypeError) as e:
# self.log.exception(formatExtendedStack())
errors.append('module %s, parameter %s: %s' % (self.name, k, e))

18
secop/params.py
View File

@ -39,10 +39,6 @@ class Accessible(HasProperties):
kwds = None # is a dict if it might be used as Override
def __init__(self, **kwds):
super().__init__()
self.init(kwds)
def init(self, kwds):
# do not use self.propertyValues.update here, as no invalid values should be
# assigned to properties, even not before checkProperties
@ -101,10 +97,10 @@ class Parameter(Accessible):
description = Property(
'mandatory description of the parameter', TextType(),
extname='description', mandatory=True)
extname='description', mandatory=True, export='always')
datatype = Property(
'datatype of the Parameter (SECoP datainfo)', DataTypeType(),
extname='datainfo', mandatory=True)
extname='datainfo', mandatory=True, export='always')
readonly = Property(
'not changeable via SECoP (default True)', BoolType(),
extname='readonly', default=True, export='always')
@ -165,7 +161,7 @@ class Parameter(Accessible):
readerror = None
def __init__(self, description=None, datatype=None, inherit=True, *, unit=None, constant=None, **kwds):
super().__init__(**kwds)
super().__init__()
if datatype is not None:
if not isinstance(datatype, DataType):
if isinstance(datatype, type) and issubclass(datatype, DataType):
@ -178,6 +174,8 @@ class Parameter(Accessible):
if 'default' in kwds:
self.default = datatype(kwds['default'])
self.init(kwds) # datatype must be defined before we can treat dataset properties like fmtstr or unit
if description is not None:
self.description = inspect.cleandoc(description)
@ -187,6 +185,7 @@ class Parameter(Accessible):
self._constant = constant
def __get__(self, instance, owner):
# not used yet
if instance is None:
return self
return instance.parameters[self.name].value
@ -282,7 +281,7 @@ class Command(Accessible):
description = Property(
'description of the Command', TextType(),
extname='description', export=True, mandatory=True)
extname='description', export='always', mandatory=True)
group = Property(
'optional command group of the command.', StringType(),
extname='group', export=True, default='')
@ -312,7 +311,8 @@ class Command(Accessible):
func = None
def __init__(self, argument=False, *, result=None, inherit=True, **kwds):
super().__init__(**kwds)
super().__init__()
self.init(kwds)
if result or kwds or isinstance(argument, DataType) or not callable(argument):
# normal case
if argument is False and result:

3
secop/poller.py
View File

@ -227,9 +227,10 @@ class Poller(PollerBase):
(where n is the number of regular parameters).
"""
if not self:
# nothing to do (else we might call time.sleep(float('inf')) below
# nothing to do (else time.sleep(float('inf')) might be called below
started_callback()
return
# if writeInitParams is not yet done, we do it here
for module in self.modules:
module.writeInitParams()
# do all polls once and, at the same time, insert due info

15
secop/protocol/interface/tcp.py
View File

@ -25,6 +25,8 @@ import socket
import socketserver
import sys
import threading
import time
import errno
from secop.datatypes import BoolType, StringType
from secop.errors import SECoPError
@ -184,8 +186,19 @@ class TCPServer(socketserver.ThreadingTCPServer):
port = int(options.pop('uri').split('://', 1)[-1])
self.detailed_errors = options.pop('detailed_errors', False)
self.allow_reuse_address = True
self.log.info("TCPServer %s binding to port %d" % (name, port))
for ntry in range(5):
try:
socketserver.ThreadingTCPServer.__init__(
self, ('0.0.0.0', port), TCPRequestHandler, bind_and_activate=True)
break
except OSError as e:
if e.args[0] == errno.EADDRINUSE: # address already in use
# this may happen despite of allow_reuse_address
time.sleep(0.3 * (1 << ntry)) # max accumulated sleep time: 0.3 * 31 = 9.3 sec
else:
self.log.error('could not initialize TCP Server: %r' % e)
raise
if ntry:
self.log.warning('tried again %d times after "Address already in use"' % ntry)
self.log.info("TCPServer initiated")

2
secop/server.py
View File

@ -256,7 +256,7 @@ class Server:
self.modules[modname] = modobj
except ConfigError as e:
errors.append('error creating module %s:' % modname)
for errtxt in e.args[0]:
for errtxt in e.args[0] if isinstance(e.args[0], list) else [e.args[0]]:
errors.append(' ' + errtxt)
except Exception:
failure_traceback = traceback.format_exc()