edd499fdc5
Ensure that on python versions that can retain the exceptions associated chain/causes that we make an attempt to retain them, on versions of python that do not have this at least attempt to retain the chain (but we will not get the nice stack formatting that comes along with that). Change-Id: I7b46854c3969463009c39be28a3131d2d3179c82
62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2014 Yahoo! Inc. All Rights Reserved.
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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 msgpack
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import six
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from tooz import coordination
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def exception_message(exc):
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"""Return the string representation of exception."""
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try:
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return six.text_type(exc)
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except UnicodeError:
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return str(exc)
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def to_binary(text, encoding='ascii'):
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"""Return the binary representation of string (if not already binary)."""
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if not isinstance(text, six.binary_type):
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text = text.encode(encoding)
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return text
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def dumps(data, excp_cls=coordination.ToozError):
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"""Serializes provided data using msgpack into a byte string.
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TODO(harlowja): use oslo.serialization 'msgpackutils.py' when we can since
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that handles more native types better than the default does...
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"""
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try:
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return msgpack.packb(data, use_bin_type=True)
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except (msgpack.PackException, ValueError) as e:
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coordination.raise_with_cause(excp_cls, exception_message(e),
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cause=e)
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def loads(blob, excp_cls=coordination.ToozError):
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"""Deserializes provided data using msgpack (from a prior byte string).
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TODO(harlowja): use oslo.serialization 'msgpackutils.py' when we can since
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that handles more native types better than the default does...
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"""
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try:
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return msgpack.unpackb(blob, encoding='utf-8')
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except (msgpack.UnpackException, ValueError) as e:
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coordination.raise_with_cause(excp_cls, exception_message(e),
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cause=e)
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