def obtain_from_python_path(name):
""" obtain_from_python_path(name) -> whatever :-)
Given a full str name like 'os.path.sep', this function returns whatever
it is in that path (for example, os.path.sep is a str, so this function
will return "the value of that variable").
"""
the_module = obtain_module(name)
#If the_module is still None, the path is wrong
if the_module == None:
raise LoaderErrors.InvalidConfigurationError(
"""I can't import any module from "%s" """ % name)
sequence_name_without = name[len(str(the_module).split("'")[1]) + 1:]
current_block = the_module
for i in sequence_name_without.split('.'):
module_name = current_block.__name__ + '.' + i
try:
__import__(module_name, globals(), locals())
except ImportError:
pass # foo.bar.MyClass will fail, but foo.bar will work
try:
current_block = getattr(current_block, i)
except AttributeError:
raise LoaderErrors.InvalidConfigurationError(
"""Couldn't find %s in module: %s""" % (i, name))
return current_block
def fill_creation(protocol_configuration, coord_address):
creation_configuration = protocol_configuration.creation
if len(creation_configuration.parameters) != 2:
raise LoaderErrors.InvalidConfigurationError(
"Unexpected number of parameters for InternetSocket creation, expected 2 and received %s"
% len(creation_configuration.parameters))
if creation_configuration.parameters[0].name == 'address':
address = creation_configuration.parameters[0].value
elif creation_configuration.parameters[1].name == 'address':
address = creation_configuration.parameters[1].value
else:
raise LoaderErrors.InvalidConfigurationError(
"Parameter 'address' not found in InternetSocket creation")
if creation_configuration.parameters[0].name == 'port':
port_value = creation_configuration.parameters[0].value
elif creation_configuration.parameters[1].name == 'port':
port_value = creation_configuration.parameters[1].value
else:
raise LoaderErrors.InvalidConfigurationError(
"Parameter 'port' not found in InternetSocket creation")
try:
port_number = int(port_value)
except ValueError:
raise LoaderErrors.InvalidConfigurationError('Invalid port: %s' %
port_value)
else:
if port_number > 65536 or port_number < 0:
raise LoaderErrors.InvalidConfigurationError('Invalid port: %s' %
port_value)
protocol_configuration.filled_creation = ('InternetSocket',
(address, port_number), {})
def fill_coordinations(coordinations_configuration, address):
if len(coordinations_configuration.coordinations) != 1:
raise LoaderErrors.InvalidConfigurationError(
"Unexpected number of coordinations for Direct, expected 1 and received %s"
% len(coordinations_configuration.parameters))
if len(coordinations_configuration.coordinations[0].parameters) != 0:
raise LoaderErrors.InvalidConfigurationError(
"Unexpected number of parameters for Direct coordinations, expected 0 and received %s"
% len(coordinations_configuration[0].parameters))
coordinations_configuration.filled_coordinations = [
Address.from_coord_address(address)
]
coordinations_configuration.filled_level = AccessLevel.instance
def fill_creation(protocol_configuration, coord_address):
creation_configuration = protocol_configuration.creation
if len(creation_configuration.parameters) != 1:
raise LoaderErrors.InvalidConfigurationError(
"Unexpected number of parameters for UnixSocket creation, expected 1 and received %s"
% len(creation_configuration.parameters))
if creation_configuration.parameters[0].name == 'socketpath':
socket_path = creation_configuration.parameters[0].value
else:
raise LoaderErrors.InvalidConfigurationError(
"Parameter 'socketpath' not found in UnixSocket creation")
protocol_configuration.filled_creation = ('UnixSocket', (socket_path, ),
{})
def _retrieve_variable(self, format_node):
text_value = LoaderUtilities.obtain_text_safe(format_node)
if text_value.count('::') != 1:
raise LoaderErrors.InvalidConfigurationError(
'Unknown format: %s. module::variable expected' % text_value
)
module_name, variable = text_value.split('::')
module_inst = LoaderUtilities.obtain_from_python_path(module_name)
try:
return getattr(module_inst, variable)
except AttributeError:
raise LoaderErrors.InvalidConfigurationError(
'Unknown format: couldn\'t find %s in %s' % (variable, module_name)
)
def fill_creation(protocol_configuration, address):
creation_configuration = protocol_configuration.creation
if len(creation_configuration.parameters) != 0:
raise LoaderErrors.InvalidConfigurationError(
"Unexpected number of parameters for Direct creation, expected 0 and received %s"
% len(creation_configuration.parameters))
protocol_configuration.filled_creation = ('Direct', (address.address, ),
{})
def _parse_server_type_module(self, server_type_node):
text_value = LoaderUtilities.obtain_text_safe(server_type_node)
if text_value.count('::') != 1:
raise LoaderErrors.InvalidConfigurationError(
'Unknown format: %s. module::variable expected' % text_value
)
module_name, _ = text_value.split('::')
module_inst = LoaderUtilities.obtain_from_python_path(module_name)
return module_inst
def fill_coordinations(coordinations_configuration, address):
coordinations = []
for coordination_configuration in coordinations_configuration.coordinations:
if len(coordination_configuration.parameters) != 1:
raise LoaderErrors.InvalidConfigurationError(
"Unexpected number of parameters for SOAP coordinations, expected 1 and received %s"
% len(coordination_configuration.parameters))
parameter = coordination_configuration.parameters[0]
if parameter.name != 'address':
raise LoaderErrors.InvalidConfigurationError(
"Parameter for SOAP coordinations should be address, found %s"
% parameter.name)
try:
address = Address.Address(parameter.value)
except Exception as e:
raise LoaderErrors.InvalidConfigurationError(
"Invalid address format for SOAP coordinations: %s" % e)
coordinations.append(address)
coordinations_configuration.filled_coordinations = coordinations
coordinations_configuration.filled_level = AccessLevel.network
def fill_coordinations(coordinations_configuration, address):
if len(coordinations_configuration.coordinations) != 1:
raise LoaderErrors.InvalidConfigurationError(
"Unexpected number of coordinations for UnixSocket, expected 1 and received %s"
% len(coordinations_configuration.parameters))
if len(coordinations_configuration.coordinations[0].parameters) != 1:
raise LoaderErrors.InvalidConfigurationError(
"Unexpected number of parameters for UnixSocket coordinations, expected 1 and received %s"
% len(coordinations_configuration[0].parameters))
parameter = coordinations_configuration.coordinations[0].parameters[0]
if parameter.name != 'sockpath':
raise LoaderErrors.InvalidConfigurationError(
"Unexpected parameter: expected 'sockpath' and found:" %
parameter.name)
coordinations_configuration.filled_coordinations = [
Address.Address(address.machine_id, parameter.value)
]
coordinations_configuration.filled_level = AccessLevel.machine
def obtain_text_safe(text_node):
text = [i for i in text_node.childNodes if isinstance(i, minidom.Text)]
if len(text) == 0:
raise LoaderErrors.InvalidConfigurationError("Empty Text Node")
else:
return text[0].nodeValue
def _parse_dom(self, stream, file_path):
try:
return minidom.parse(stream)
except Exception as e:
raise LoaderErrors.InvalidConfigurationError("Couldn't load xml file %s: %s" % (file_path, e))
def parse(self, directory, address = None):
if not isinstance(self, GlobalParser) and address is None:
raise LoaderErrors.InvalidConfigurationError( "Missing address parameter" )
stream, file_path = self._retrieve_stream(directory)
return self._parse_from_stream(stream, directory, file_path, address)
def _retrieve_stream(self, directory):
file_path = os.sep.join((directory,'configuration.xml'))
try:
return open(file_path), file_path
except Exception as e:
raise LoaderErrors.InvalidConfigurationError("Couldn't parse '%s': %s" % (file_path,e))