61f84d03ca
The syntax is
Try:
- Throw: ns:name #can be list of names to simulate type hierarchy
Message: message #optional
Cause: $sourceException #optional
Extra: { 'someExtra': 'data' } #optional
Catch:
- With: ns:name #can be list of names
- As: exception #optional
- Do:
- Rethrow:
Else: #optional
- else block
Finally: #optional
- finally block
Improves stack traces to contain information about Python native stack frames and macro blocks
Change-Id: I2e2bcc5e1a0da5f9489d73525f8b3fa99cc0220c
Implements: blueprint muranopl-exception-handling
122 lines
3.9 KiB
Python
122 lines
3.9 KiB
Python
# Copyright (c) 2014 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import inspect
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import types
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import murano.dsl.macros as macros
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import murano.dsl.typespec as typespec
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import murano.dsl.virtual_exceptions as virtual_exceptions
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import murano.dsl.yaql_expression as yaql_expression
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try:
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from collections import OrderedDict # noqa
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except ImportError: # python2.6
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from ordereddict import OrderedDict # noqa
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macros.register()
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virtual_exceptions.register()
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class MethodUsages(object):
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Action = 'Action'
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Runtime = 'Runtime'
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All = set([Action, Runtime])
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def methodusage(usage):
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def wrapper(method):
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method._murano_method_usage = usage
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return method
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return wrapper
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class MuranoMethod(object):
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def __init__(self, namespace_resolver,
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murano_class, name, payload):
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self._name = name
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self._namespace_resolver = namespace_resolver
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if callable(payload):
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self._body = payload
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self._arguments_scheme = self._generate_arguments_scheme(payload)
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self._usage = getattr(payload, '_murano_method_usage',
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MethodUsages.Runtime)
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else:
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payload = payload or {}
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self._body = self._prepare_body(payload.get('Body') or [], name)
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self._usage = payload.get('Usage') or MethodUsages.Runtime
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arguments_scheme = payload.get('Arguments') or []
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if isinstance(arguments_scheme, types.DictionaryType):
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arguments_scheme = [{key: value} for key, value in
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arguments_scheme.iteritems()]
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self._arguments_scheme = OrderedDict()
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for record in arguments_scheme:
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if not isinstance(record, types.DictionaryType) \
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or len(record) > 1:
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raise ValueError()
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name = record.keys()[0]
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self._arguments_scheme[name] = typespec.ArgumentSpec(
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record[name], self._namespace_resolver)
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self._murano_class = murano_class
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@property
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def name(self):
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return self._name
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@property
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def murano_class(self):
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return self._murano_class
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@property
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def arguments_scheme(self):
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return self._arguments_scheme
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@property
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def usage(self):
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return self._usage
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@property
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def body(self):
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return self._body
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def _generate_arguments_scheme(self, func):
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func_info = inspect.getargspec(func)
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data = [(name, {'Contract': yaql_expression.YaqlExpression('$')})
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for name in func_info.args]
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if inspect.ismethod(func):
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data = data[1:]
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defaults = func_info.defaults or tuple()
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for i in xrange(len(defaults)):
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data[i + len(data) - len(defaults)][1]['Default'] = defaults[i]
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result = OrderedDict([
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(name, typespec.ArgumentSpec(
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declaration, self._namespace_resolver))
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for name, declaration in data])
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if '_context' in result:
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del result['_context']
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return result
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def _prepare_body(self, body, name):
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return macros.MethodBlock(body, name)
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def __repr__(self):
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return 'MuranoMethod({0}::{1})'.format(
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self.murano_class.name, self.name)
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def invoke(self, executor, this, parameters):
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return self.murano_class.invoke(self.name, executor, this, parameters)
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