Port flavor_access extension to v3 API Part 1

This changeset only copies the v2 files (implementation and test)
into the appropriate v3 directories unchanged. The copy as-is
will not be loaded by either the v2 or v3 extension loaders. The
second changeset will then make the changes required for it to
work as a v3 extension.

This is being done in order to make reviewing of extension porting
easier as gerrit will display only what is actually changed for v3
rather than entirely new files

Partially implements blueprint nova-v3-api

Change-Id: I6a2648ac9f59ff122f06a63991b57e595b2c5696

1 files changed, 224 insertions, 0 deletions

diff --git a/nova/api/openstack/compute/plugins/v3/flavor_access.py b/nova/api/openstack/compute/plugins/v3/flavor_access.py
new file mode 100644
index 000000000..bea92d883
--- /dev/null
+++ b/nova/api/openstack/compute/plugins/v3/flavor_access.py
@@ -0,0 +1,224 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright (c) 2011 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.
+
+"""The flavor access extension."""
+
+import webob
+
+from nova.api.openstack import extensions
+from nova.api.openstack import wsgi
+from nova.api.openstack import xmlutil
+from nova.compute import flavors
+from nova import exception
+
+
+authorize = extensions.soft_extension_authorizer('compute', 'flavor_access')
+
+
+def make_flavor(elem):
+    elem.set('{%s}is_public' % Flavor_access.namespace,
+             '%s:is_public' % Flavor_access.alias)
+
+
+def make_flavor_access(elem):
+    elem.set('flavor_id')
+    elem.set('tenant_id')
+
+
+class FlavorTemplate(xmlutil.TemplateBuilder):
+    def construct(self):
+        root = xmlutil.TemplateElement('flavor', selector='flavor')
+        make_flavor(root)
+        alias = Flavor_access.alias
+        namespace = Flavor_access.namespace
+        return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
+
+
+class FlavorsTemplate(xmlutil.TemplateBuilder):
+    def construct(self):
+        root = xmlutil.TemplateElement('flavors')
+        elem = xmlutil.SubTemplateElement(root, 'flavor', selector='flavors')
+        make_flavor(elem)
+        alias = Flavor_access.alias
+        namespace = Flavor_access.namespace
+        return xmlutil.SlaveTemplate(root, 1, nsmap={alias: namespace})
+
+
+class FlavorAccessTemplate(xmlutil.TemplateBuilder):
+    def construct(self):
+        root = xmlutil.TemplateElement('flavor_access')
+        elem = xmlutil.SubTemplateElement(root, 'access',
+                                          selector='flavor_access')
+        make_flavor_access(elem)
+        return xmlutil.MasterTemplate(root, 1)
+
+
+def _marshall_flavor_access(flavor_id):
+    rval = []
+    try:
+        access_list = flavors.\
+                      get_flavor_access_by_flavor_id(flavor_id)
+    except exception.FlavorNotFound:
+        explanation = _("Flavor not found.")
+        raise webob.exc.HTTPNotFound(explanation=explanation)
+
+    for access in access_list:
+        rval.append({'flavor_id': flavor_id,
+                     'tenant_id': access['project_id']})
+
+    return {'flavor_access': rval}
+
+
+class FlavorAccessController(object):
+    """The flavor access API controller for the OpenStack API."""
+
+    def __init__(self):
+        super(FlavorAccessController, self).__init__()
+
+    @wsgi.serializers(xml=FlavorAccessTemplate)
+    def index(self, req, flavor_id):
+        context = req.environ['nova.context']
+        authorize(context)
+
+        try:
+            flavor = flavors.get_flavor_by_flavor_id(flavor_id)
+        except exception.FlavorNotFound:
+            explanation = _("Flavor not found.")
+            raise webob.exc.HTTPNotFound(explanation=explanation)
+
+        # public flavor to all projects
+        if flavor['is_public']:
+            explanation = _("Access list not available for public flavors.")
+            raise webob.exc.HTTPNotFound(explanation=explanation)
+
+        # private flavor to listed projects only
+        return _marshall_flavor_access(flavor_id)
+
+
+class FlavorActionController(wsgi.Controller):
+    """The flavor access API controller for the OpenStack API."""
+
+    def _check_body(self, body):
+        if body is None or body == "":
+            raise webob.exc.HTTPBadRequest(explanation=_("No request body"))
+
+    def _get_flavor_refs(self, context):
+        """Return a dictionary mapping flavorid to flavor_ref."""
+
+        flavor_refs = flavors.get_all_flavors(context)
+        rval = {}
+        for name, obj in flavor_refs.iteritems():
+            rval[obj['flavorid']] = obj
+        return rval
+
+    def _extend_flavor(self, flavor_rval, flavor_ref):
+        key = "%s:is_public" % (Flavor_access.alias)
+        flavor_rval[key] = flavor_ref['is_public']
+
+    @wsgi.extends
+    def show(self, req, resp_obj, id):
+        context = req.environ['nova.context']
+        if authorize(context):
+            # Attach our slave template to the response object
+            resp_obj.attach(xml=FlavorTemplate())
+            db_flavor = req.get_db_flavor(id)
+
+            self._extend_flavor(resp_obj.obj['flavor'], db_flavor)
+
+    @wsgi.extends
+    def detail(self, req, resp_obj):
+        context = req.environ['nova.context']
+        if authorize(context):
+            # Attach our slave template to the response object
+            resp_obj.attach(xml=FlavorsTemplate())
+
+            flavors = list(resp_obj.obj['flavors'])
+            for flavor_rval in flavors:
+                db_flavor = req.get_db_flavor(flavor_rval['id'])
+                self._extend_flavor(flavor_rval, db_flavor)
+
+    @wsgi.extends(action='create')
+    def create(self, req, body, resp_obj):
+        context = req.environ['nova.context']
+        if authorize(context):
+            # Attach our slave template to the response object
+            resp_obj.attach(xml=FlavorTemplate())
+
+            db_flavor = req.get_db_flavor(resp_obj.obj['flavor']['id'])
+
+            self._extend_flavor(resp_obj.obj['flavor'], db_flavor)
+
+    @wsgi.serializers(xml=FlavorAccessTemplate)
+    @wsgi.action("addTenantAccess")
+    def _addTenantAccess(self, req, id, body):
+        context = req.environ['nova.context']
+        authorize(context)
+        self._check_body(body)
+
+        vals = body['addTenantAccess']
+        tenant = vals['tenant']
+
+        try:
+            flavors.add_flavor_access(id, tenant, context)
+        except exception.FlavorAccessExists as err:
+            raise webob.exc.HTTPConflict(explanation=err.format_message())
+
+        return _marshall_flavor_access(id)
+
+    @wsgi.serializers(xml=FlavorAccessTemplate)
+    @wsgi.action("removeTenantAccess")
+    def _removeTenantAccess(self, req, id, body):
+        context = req.environ['nova.context']
+        authorize(context)
+        self._check_body(body)
+
+        vals = body['removeTenantAccess']
+        tenant = vals['tenant']
+
+        try:
+            flavors.remove_flavor_access(id, tenant, context)
+        except exception.FlavorAccessNotFound as e:
+            raise webob.exc.HTTPNotFound(explanation=e.format_message())
+
+        return _marshall_flavor_access(id)
+
+
+class Flavor_access(extensions.ExtensionDescriptor):
+    """Flavor access support."""
+
+    name = "FlavorAccess"
+    alias = "os-flavor-access"
+    namespace = ("http://docs.openstack.org/compute/ext/"
+                 "flavor_access/api/v2")
+    updated = "2012-08-01T00:00:00+00:00"
+
+    def get_resources(self):
+        resources = []
+
+        res = extensions.ResourceExtension(
+            'os-flavor-access',
+            controller=FlavorAccessController(),
+            parent=dict(member_name='flavor', collection_name='flavors'))
+        resources.append(res)
+
+        return resources
+
+    def get_controller_extensions(self):
+        extension = extensions.ControllerExtension(
+                self, 'flavors', FlavorActionController())
+
+        return [extension]