81b45f2c1d
The statless design was developed in the experiment branch, the experiment shows advantage in removing the status synchronization, uuid mapping compared to the stateful design, and also fully reduce the coupling with OpenStack services like Nova, Cinder. The overhead query latency for resources also acceptable. It's time to move the statless design to the master branch BP: https://blueprints.launchpad.net/tricircle/+spec/implement-stateless Change-Id: I51bbb60dc07da5b2e79f25e02209aa2eb72711ac Signed-off-by: Chaoyi Huang <joehuang@huawei.com>
123 lines
3.7 KiB
Python
123 lines
3.7 KiB
Python
# Copyright 2015 Huawei Technologies Co., Ltd.
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# 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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"""
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Tricircle base exception handling.
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"""
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import six
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from oslo_utils import excutils
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from tricircle.common.i18n import _
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class TricircleException(Exception):
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"""Base Tricircle Exception.
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To correctly use this class, inherit from it and define
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a 'message' property. That message will get printf'd
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with the keyword arguments provided to the constructor.
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"""
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message = _("An unknown exception occurred.")
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def __init__(self, **kwargs):
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try:
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super(TricircleException, self).__init__(self.message % kwargs)
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self.msg = self.message % kwargs
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except Exception:
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with excutils.save_and_reraise_exception() as ctxt:
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if not self.use_fatal_exceptions():
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ctxt.reraise = False
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# at least get the core message out if something happened
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super(TricircleException, self).__init__(self.message)
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if six.PY2:
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def __unicode__(self):
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return unicode(self.msg)
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def use_fatal_exceptions(self):
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return False
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class BadRequest(TricircleException):
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message = _('Bad %(resource)s request: %(msg)s')
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class NotFound(TricircleException):
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pass
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class Conflict(TricircleException):
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pass
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class NotAuthorized(TricircleException):
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message = _("Not authorized.")
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class ServiceUnavailable(TricircleException):
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message = _("The service is unavailable")
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class AdminRequired(NotAuthorized):
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message = _("User does not have admin privileges: %(reason)s")
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class InUse(TricircleException):
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message = _("The resource is inuse")
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class InvalidConfigurationOption(TricircleException):
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message = _("An invalid value was provided for %(opt_name)s: "
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"%(opt_value)s")
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class EndpointNotAvailable(TricircleException):
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message = "Endpoint %(url)s for %(service)s is not available"
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def __init__(self, service, url):
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super(EndpointNotAvailable, self).__init__(service=service, url=url)
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class EndpointNotUnique(TricircleException):
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message = "Endpoint for %(service)s in %(pod)s not unique"
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def __init__(self, pod, service):
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super(EndpointNotUnique, self).__init__(pod=pod, service=service)
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class EndpointNotFound(TricircleException):
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message = "Endpoint for %(service)s in %(pod)s not found"
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def __init__(self, pod, service):
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super(EndpointNotFound, self).__init__(pod=pod, service=service)
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class ResourceNotFound(TricircleException):
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message = "Could not find %(resource_type)s: %(unique_key)s"
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def __init__(self, model, unique_key):
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resource_type = model.__name__.lower()
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super(ResourceNotFound, self).__init__(resource_type=resource_type,
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unique_key=unique_key)
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class ResourceNotSupported(TricircleException):
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message = "%(method)s method not supported for %(resource)s"
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def __init__(self, resource, method):
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super(ResourceNotSupported, self).__init__(resource=resource,
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method=method)
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