from types import StringTypes
+import time
+import re
from PLC.Faults import *
from PLC.Parameter import Parameter
+from PLC.Filter import Filter
from PLC.Debug import profile
from PLC.Table import Row, Table
+from PLC.SliceInstantiations import SliceInstantiation, SliceInstantiations
+from PLC.Nodes import Node, Nodes
+from PLC.Persons import Person, Persons
class Slice(Row):
"""
- Representation of a row in the slices table. To use, instantiate
+ Representation of a row in the slices table. To use, optionally
+ instantiate with a dict of values. Update as you would a
+ dict. Commit to the database with sync().To use, instantiate
with a dict of values.
"""
+ table_name = 'slices'
+ primary_key = 'slice_id'
+ join_tables = ['slice_node', 'slice_person', 'slice_attribute', 'peer_slice']
fields = {
- 'slice_id': Parameter(int, "Slice type"),
+ 'slice_id': Parameter(int, "Slice identifier"),
+ 'site_id': Parameter(int, "Identifier of the site to which this slice belongs"),
+ 'name': Parameter(str, "Slice name", max = 32),
+ 'instantiation': Parameter(str, "Slice instantiation state"),
+ 'url': Parameter(str, "URL further describing this slice", max = 254, nullok = True),
+ 'description': Parameter(str, "Slice description", max = 2048, nullok = True),
+ 'max_nodes': Parameter(int, "Maximum number of nodes that can be assigned to this slice"),
+ 'creator_person_id': Parameter(int, "Identifier of the account that created this slice"),
+ 'created': Parameter(int, "Date and time when slice was created, in seconds since UNIX epoch", ro = True),
+ 'expires': Parameter(int, "Date and time when slice expires, in seconds since UNIX epoch"),
+ 'node_ids': Parameter([int], "List of nodes in this slice", ro = True),
+ 'person_ids': Parameter([int], "List of accounts that can use this slice", ro = True),
+ 'slice_attribute_ids': Parameter([int], "List of slice attributes", ro = True),
+ 'peer_id': Parameter(int, "Peer to which this slice belongs", nullok = True),
+ 'peer_slice_id': Parameter(int, "Foreign slice identifier at peer", nullok = True),
}
+ # for Cache
+ class_key = 'name'
+ foreign_fields = ['instantiation', 'url', 'description', 'max_nodes', 'expires']
+ foreign_xrefs = [
+ {'field': 'node_ids' , 'class': 'Node', 'table': 'slice_node' },
+ {'field': 'person_ids', 'class': 'Person', 'table': 'slice_person'},
+ {'field': 'creator_person_id', 'class': 'Person', 'table': 'unused-on-direct-refs'},
+ {'field': 'site_id', 'class': 'Site', 'table': 'unused-on-direct-refs'},
+ ]
+ # forget about this one, it is read-only anyway
+ # handling it causes Cache to re-sync all over again
+ # 'created'
- def __init__(self, api, fields):
- self.api = api
- dict.__init__(fields)
+ def validate_name(self, name):
+ # N.B.: Responsibility of the caller to ensure that login_base
+ # portion of the slice name corresponds to a valid site, if
+ # desired.
- def commit(self):
- # XXX
- pass
+ # 1. Lowercase.
+ # 2. Begins with login_base (only letters).
+ # 3. Then single underscore after login_base.
+ # 4. Then letters, numbers, or underscores.
+ good_name = r'^[a-z]+_[a-z0-9_]+$'
+ if not name or \
+ not re.match(good_name, name):
+ raise PLCInvalidArgument, "Invalid slice name"
- def delete(self):
- # XXX
- pass
+ conflicts = Slices(self.api, [name])
+ for slice in conflicts:
+ if 'slice_id' not in self or self['slice_id'] != slice['slice_id']:
+ raise PLCInvalidArgument, "Slice name already in use, %s"%name
+
+ return name
+
+ def validate_instantiation(self, instantiation):
+ instantiations = [row['instantiation'] for row in SliceInstantiations(self.api)]
+ if instantiation not in instantiations:
+ raise PLCInvalidArgument, "No such instantiation state"
+
+ return instantiation
+
+ validate_created = Row.validate_timestamp
+
+ def validate_expires(self, expires):
+ # N.B.: Responsibility of the caller to ensure that expires is
+ # not too far into the future.
+ return Row.validate_timestamp(self, expires, check_future = True)
+
+ add_person = Row.add_object(Person, 'slice_person')
+ remove_person = Row.remove_object(Person, 'slice_person')
+
+ add_node = Row.add_object(Node, 'slice_node')
+ remove_node = Row.remove_object(Node, 'slice_node')
+
+ def sync(self, commit = True):
+ """
+ Add or update a slice.
+ """
+
+ # Before a new slice is added, delete expired slices
+ if 'slice_id' not in self:
+ expired = Slices(self.api, expires = -int(time.time()))
+ for slice in expired:
+ slice.delete(commit)
+
+ Row.sync(self, commit)
+
+ def delete(self, commit = True):
+ """
+ Delete existing slice.
+ """
+
+ assert 'slice_id' in self
+
+ # Clean up miscellaneous join tables
+ for table in self.join_tables:
+ self.api.db.do("DELETE FROM %s WHERE slice_id = %d" % \
+ (table, self['slice_id']))
+
+ # Mark as deleted
+ self['is_deleted'] = True
+ self.sync(commit)
class Slices(Table):
"""
database.
"""
- def __init__(self, api, slice_id_list = None):
- # XXX
- pass
+ def __init__(self, api, slice_filter = None, columns = None, expires = int(time.time())):
+ Table.__init__(self, api, Slice, columns)
+
+ sql = "SELECT %s FROM view_slices WHERE is_deleted IS False" % \
+ ", ".join(self.columns)
+
+ if expires is not None:
+ if expires >= 0:
+ sql += " AND expires > %(expires)d"
+ else:
+ expires = -expires
+ sql += " AND expires < %(expires)d"
+
+ if slice_filter is not None:
+ if isinstance(slice_filter, (list, tuple, set)):
+ # Separate the list into integers and strings
+ ints = filter(lambda x: isinstance(x, (int, long)), slice_filter)
+ strs = filter(lambda x: isinstance(x, StringTypes), slice_filter)
+ slice_filter = Filter(Slice.fields, {'slice_id': ints, 'name': strs})
+ sql += " AND (%s)" % slice_filter.sql(api, "OR")
+ elif isinstance(slice_filter, dict):
+ slice_filter = Filter(Slice.fields, slice_filter)
+ sql += " AND (%s)" % slice_filter.sql(api, "AND")
+
+ self.selectall(sql, locals())
git://git.onelab.eu / plcapi.git / blobdiff