1 from types import StringTypes
5 from PLC.Faults import *
6 from PLC.Parameter import Parameter
7 from PLC.Debug import profile
8 from PLC.Table import Row, Table
9 from PLC.SliceInstantiations import SliceInstantiations
10 from PLC.Nodes import Node, Nodes
15 Representation of a row in the slices table. To use, optionally
16 instantiate with a dict of values. Update as you would a
17 dict. Commit to the database with sync().To use, instantiate
18 with a dict of values.
22 primary_key = 'slice_id'
24 'slice_id': Parameter(int, "Slice type"),
25 'site_id': Parameter(int, "Identifier of the site to which this slice belongs"),
26 'name': Parameter(str, "Slice name", max = 32),
27 'instantiation': Parameter(str, "Slice instantiation state"),
28 'url': Parameter(str, "URL further describing this slice", max = 254),
29 'description': Parameter(str, "Slice description", max = 2048),
30 'max_nodes': Parameter(int, "Maximum number of nodes that can be assigned to this slice"),
31 'creator_person_id': Parameter(int, "Identifier of the account that created this slice"),
32 'created': Parameter(int, "Date and time when slice was created, in seconds since UNIX epoch", ro = True),
33 'expires': Parameter(int, "Date and time when slice expires, in seconds since UNIX epoch"),
34 'node_ids': Parameter([int], "List of nodes in this slice", ro = True),
35 'person_ids': Parameter([int], "List of accounts that can use this slice", ro = True),
36 'slice_attribute_ids': Parameter([int], "List of slice attributes", ro = True),
39 def validate_name(self, name):
40 # N.B.: Responsibility of the caller to ensure that login_base
41 # portion of the slice name corresponds to a valid site, if
45 # 2. Begins with login_base (only letters).
46 # 3. Then single underscore after login_base.
47 # 4. Then letters, numbers, or underscores.
48 good_name = r'^[a-z]+_[a-z0-9_]+$'
50 not re.match(good_name, name):
51 raise PLCInvalidArgument, "Invalid slice name"
53 conflicts = Slices(self.api, [name])
54 for slice_id, slice in conflicts.iteritems():
55 if 'slice_id' not in self or self['slice_id'] != slice_id:
56 raise PLCInvalidArgument, "Slice name already in use"
60 def validate_instantiation(self, instantiation):
61 instantiations = SliceInstantiations(self.api)
62 if instantiation not in instantiations:
63 raise PLCInvalidArgument, "No such instantiation state"
67 def validate_expires(self, expires):
68 # N.B.: Responsibility of the caller to ensure that expires is
69 # not too far into the future.
70 if expires < time.time():
71 raise PLCInvalidArgument, "Expiration date must be in the future"
73 return time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime(expires))
75 def validate_creator_person_id(self, person_id):
76 persons = PLC.Persons.Persons(self.api, [person_id])
78 raise PLCInvalidArgument, "Invalid creator"
82 def add_person(self, person, commit = True):
84 Add person to existing slice.
87 assert 'slice_id' in self
88 assert isinstance(person, PLC.Persons.Person)
89 assert 'person_id' in person
91 slice_id = self['slice_id']
92 person_id = person['person_id']
94 if person_id not in self['person_ids']:
95 assert slice_id not in person['slice_ids']
97 self.api.db.do("INSERT INTO slice_person (person_id, slice_id)" \
98 " VALUES(%(person_id)d, %(slice_id)d)",
104 self['person_ids'].append(person_id)
105 person['slice_ids'].append(slice_id)
107 def remove_person(self, person, commit = True):
109 Remove person from existing slice.
112 assert 'slice_id' in self
113 assert isinstance(person, PLC.Persons.Person)
114 assert 'person_id' in person
116 slice_id = self['slice_id']
117 person_id = person['person_id']
119 if person_id in self['person_ids']:
120 assert slice_id in person['slice_ids']
122 self.api.db.do("DELETE FROM slice_person" \
123 " WHERE person_id = %(person_id)d" \
124 " AND slice_id = %(slice_id)d",
130 self['person_ids'].remove(person_id)
131 person['slice_ids'].remove(slice_id)
133 def add_node(self, node, commit = True):
135 Add node to existing slice.
138 assert 'slice_id' in self
139 assert isinstance(node, Node)
140 assert 'node_id' in node
142 slice_id = self['slice_id']
143 node_id = node['node_id']
145 if node_id not in self['node_ids']:
146 assert slice_id not in node['slice_ids']
148 self.api.db.do("INSERT INTO slice_node (node_id, slice_id)" \
149 " VALUES(%(node_id)d, %(slice_id)d)",
155 self['node_ids'].append(node_id)
156 node['slice_ids'].append(slice_id)
158 def remove_node(self, node, commit = True):
160 Remove node from existing slice.
163 assert 'slice_id' in self
164 assert isinstance(node, Node)
165 assert 'node_id' in node
167 slice_id = self['slice_id']
168 node_id = node['node_id']
170 if node_id in self['node_ids']:
171 assert slice_id in node['slice_ids']
173 self.api.db.do("DELETE FROM slice_node" \
174 " WHERE node_id = %(node_id)d" \
175 " AND slice_id = %(slice_id)d",
181 self['node_ids'].remove(node_id)
182 node['slice_ids'].remove(slice_id)
184 def delete(self, commit = True):
186 Delete existing slice.
189 assert 'slice_id' in self
191 # Clean up miscellaneous join tables
192 for table in ['slice_node', 'slice_person', 'slice_attribute']:
193 self.api.db.do("DELETE FROM %s" \
194 " WHERE slice_id = %d" % \
195 (table, self['slice_id']), self)
198 self['is_deleted'] = True
203 Representation of row(s) from the slices table in the
207 def __init__(self, api, slice_id_or_name_list = None):
210 sql = "SELECT %s FROM view_slices WHERE is_deleted IS False" % \
211 ", ".join(Slice.fields)
213 if slice_id_or_name_list:
214 # Separate the list into integers and strings
215 slice_ids = filter(lambda slice_id: isinstance(slice_id, (int, long)),
216 slice_id_or_name_list)
217 names = filter(lambda name: isinstance(name, StringTypes),
218 slice_id_or_name_list)
221 sql += " OR slice_id IN (%s)" % ", ".join(map(str, slice_ids))
223 sql += " OR name IN (%s)" % ", ".join(api.db.quote(names))
226 rows = self.api.db.selectall(sql)
229 self[row['slice_id']] = slice = Slice(api, row)
230 for aggregate in 'node_ids', 'person_ids', 'slice_attribute_ids':
231 if not slice.has_key(aggregate) or slice[aggregate] is None:
232 slice[aggregate] = []
234 slice[aggregate] = map(int, slice[aggregate].split(','))