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OpenStack Study: exceptions.py

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# Copyright (c) 2013 OpenStack Foundation

# All Rights Reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License"); you may

# not use this file except in compliance with the License. You may obtain

# a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

# License for the specific language governing permissions and limitations

# under the License.

"""Exceptions used by Cisco Nexus ML2 mechanism driver."""

from neutron.common import exceptions

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class CredentialNotFound(exceptions.NeutronException):

"""Credential with this ID cannot be found."""

message = _("Credential %(credential_id)s could not be found.")

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class CredentialNameNotFound(exceptions.NeutronException):

"""Credential Name could not be found."""

message = _("Credential %(credential_name)s could not be found.")

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class CredentialAlreadyExists(exceptions.NeutronException):

"""Credential name already exists."""

message = _("Credential %(credential_name)s already exists "

"for tenant %(tenant_id)s.")

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class NexusComputeHostNotConfigured(exceptions.NeutronException):

"""Connection to compute host is not configured."""

message = _("Connection to %(host)s is not configured.")

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class NexusConnectFailed(exceptions.NeutronException):

"""Failed to connect to Nexus switch."""

message = _("Unable to connect to Nexus %(nexus_host)s. Reason: %(exc)s.")

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class NexusConfigFailed(exceptions.NeutronException):

"""Failed to configure Nexus switch."""

message = _("Failed to configure Nexus: %(config)s. Reason: %(exc)s.")

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class NexusPortBindingNotFound(exceptions.NeutronException):

"""NexusPort Binding is not present."""

message = _("Nexus Port Binding (%(filters)s) is not present")

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    def __init__(self, **kwargs):

        filters = ','.join('%s=%s' % i for i in kwargs.items())

        super(NexusPortBindingNotFound, self).__init__(filters=filters)

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class NexusMissingRequiredFields(exceptions.NeutronException):

"""Missing required fields to configure nexus switch."""

message = _("Missing required field(s) to configure nexus switch: "

"%(fields)s")

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class NoNexusSviSwitch(exceptions.NeutronException):

"""No usable nexus switch found."""

message = _("No usable Nexus switch found to create SVI interface.")

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class SubnetNotSpecified(exceptions.NeutronException):

"""Subnet id not specified."""

message = _("No subnet_id specified for router gateway.")

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class SubnetInterfacePresent(exceptions.NeutronException):

"""Subnet SVI interface already exists."""

message = _("Subnet %(subnet_id)s has an interface on %(router_id)s.")

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class PortIdForNexusSvi(exceptions.NeutronException):

"""Port Id specified for Nexus SVI."""

message = _('Nexus hardware router gateway only uses Subnet Ids.')