1 from types import StringTypes
6 from PLC.Faults import *
7 from PLC.Parameter import Parameter, Mixed
8 from PLC.Filter import Filter
9 from PLC.Debug import profile
10 from PLC.Nodes import Node
11 from PLC.Persons import Person, Persons
12 from PLC.SlicePersons import SlicePerson, SlicePersons
13 from PLC.SliceNodes import SliceNode, SliceNodes
14 from PLC.SliceTags import SliceTag, SliceTags
15 from PLC.Timestamp import Timestamp
16 from PLC.Storage.AlchemyObject import AlchemyObj
18 class Slice(AlchemyObj):
20 Representation of a row in the slices table. To use, optionally
21 instantiate with a dict of values. Update as you would a
22 dict. Commit to the database with sync().To use, instantiate
23 with a dict of values.
29 'slice_id': Parameter(int, "Slice identifier", primary_key=True),
30 'site_id': Parameter(int, "Identifier of the site to which this slice belongs"),
31 'name': Parameter(str, "Slice name", max = 32),
32 'instantiation': Parameter(str, "Slice instantiation state", nullok=True),
33 'url': Parameter(str, "URL further describing this slice", max = 254, nullok = True),
34 'description': Parameter(str, "Slice description", max = 2048, nullok = True),
35 'max_nodes': Parameter(int, "Maximum number of nodes that can be assigned to this slice"),
36 'creator_person_id': Parameter(str, "Identifier of the account that created this slice"),
37 'created': Parameter(datetime, "Date and time when slice was created, in seconds since UNIX epoch", ro = True),
38 'expires': Parameter(datetime, "Date and time when slice expires, in seconds since UNIX epoch"),
39 'node_ids': Parameter([str], "List of nodes in this slice", joined = True),
40 'person_ids': Parameter([str], "List of accounts that can use this slice", joined = True),
41 'slice_tag_ids': Parameter([int], "List of slice attributes", joined = True),
42 'peer_id': Parameter(int, "Peer to which this slice belongs", nullok = True),
43 'peer_slice_id': Parameter(int, "Foreign slice identifier at peer", nullok = True),
47 def validate_name(self, name):
48 # N.B.: Responsibility of the caller to ensure that login_base
49 # portion of the slice name corresponds to a valid site, if
53 # 2. Begins with login_base (letters or numbers).
54 # 3. Then single underscore after login_base.
55 # 4. Then letters, numbers, or underscores.
56 good_name = r'^[a-z0-9]+_[a-zA-Z0-9_]+$'
58 not re.match(good_name, name):
59 raise PLCInvalidArgument, "Invalid slice name"
61 conflicts = Slices(self.api, [name])
62 for slice in conflicts:
63 if 'slice_id' not in self or self['slice_id'] != slice.slice_id:
64 raise PLCInvalidArgument, "Slice name already in use, %s"%name
68 def validate_expires(self, expires):
69 # N.B.: Responsibility of the caller to ensure that expires is
70 # not too far into the future.
71 check_future = not ('is_deleted' in self and self['is_deleted'])
72 return Timestamp.sql_validate( expires, check_future = check_future)
74 #add_person = Row.add_object(Person, 'slice_person')
75 #remove_person = Row.remove_object(Person, 'slice_person')
77 #add_node = Row.add_object(Node, 'slice_node')
78 #remove_node = Row.remove_object(Node, 'slice_node')
80 #add_to_node_whitelist = Row.add_object(Node, 'node_slice_whitelist')
81 #delete_from_node_whitelist = Row.remove_object(Node, 'node_slice_whitelist')
83 def sync(self, commit = True, validate=True):
85 Add or update a slice.
87 AlchemyObj.sync(self, commit, validate)
88 if 'slice_id' not in self:
89 # Before a new slice is added, delete expired slices
90 #expired = Slices(self.api, expires = -int(time.time()))
91 #for slice in expired:
92 # slice.delete(commit)
93 AlchemyObj.insert(self, dict(self))
95 AlchemyObj.update(self, self['slice_id'], dict(self))
97 def delete(self, commit = True):
99 Delete existing slice.
101 assert 'slice_id' in self
102 # delete relationships
103 SlicePerson().delete(self, filter={'slice_id': self['slice_id']})
104 SliceNode().delete(self, filter={'slice_id': self['slice_id']})
105 SliceTag().delete(self, filter={'slice_id': self['slice_id']})
106 AlchemyObj.delete(self, dict(self))
111 Representation of row(s) from the slices table in the
115 def __init__(self, api, slice_filter = None, columns = None, expires = int(time.time())):
117 # the view that we're selecting upon: start with view_slices
119 slices = Slice().select()
120 elif isinstance (slice_filter, StringTypes):
121 slices = Slice().select(filter={'name': slice_filter})
122 elif isinstance(slice_filter, dict):
123 slices = Slice().select(filter=slice_filter)
124 elif isinstance(slice_filter, (list, tuple, set)):
125 slices = Slice().select()
126 slices = [slice for slice in slices if slice.id in slice_filter]
128 raise PLCInvalidArgument, "Wrong slice filter %r"%slice_filter
131 slice = Slice(api, object=slice)
132 if not columns or 'person_ids' in columns:
133 slice_persons = SlicePerson().select(filter={'slice_id': slice.id})
134 slice['person_ids'] = [rec.person_id for rec in slice_persons]
136 if not columns or 'node_ids' in columns:
137 slice_nodes = SliceNode().select(filter={'slice_id': slice.id})
138 slice['node_ids'] = [rec.node_id for rec in slice_nodes]
140 if not columns or 'slice_tag_ids' in columns:
141 slice_tags = SliceTag().select(filter={'slice_id': slice.id})
142 slice['slice_tag_ids'] = [rec.slice_tag_id for rec in slice_tags]