from types import StringTypes
+import time
from PLC.Faults import *
from PLC.Parameter import Parameter
from PLC.Debug import profile
from PLC.Table import Row, Table
+import PLC.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.
"""
fields = {
'slice_id': Parameter(int, "Slice type"),
+ 'site_id': Parameter(int, "Identifier of the site to which this slice belongs"),
+ 'name': Parameter(str, "Slice name", max = 32),
+ 'state': Parameter(str, "Slice state"),
+ 'url': Parameter(str, "URL further describing this slice", max = 254),
+ 'description': Parameter(str, "Slice description", max = 2048),
+ '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"),
+ 'expires': Parameter(int, "Date and time when slice expires, in seconds since UNIX epoch"),
+ 'is_deleted': Parameter(bool, "Has been deleted"),
+ 'node_ids': Parameter([int], "List of nodes in this slice"),
+ 'person_ids': Parameter([int], "List of accounts that can use this slice"),
+ 'attribute_ids': Parameter([int], "List of slice attributes"),
}
def __init__(self, api, fields):
+ Row.__init__(self, fields)
self.api = api
- dict.__init__(fields)
- def commit(self):
- # XXX
- pass
+ 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.
+ conflicts = Slices(self.api, [name])
+ for slice_id, slice in conflicts.iteritems():
+ if not slice['is_deleted'] and ('slice_id' not in self or self['slice_id'] != slice_id):
+ raise PLCInvalidArgument, "Slice name already in use"
- def delete(self):
- # XXX
- pass
+ return name
+
+ def validate_instantiation(self, instantiation):
+ instantiations = SliceInstantiations(self.api)
+ if instantiation not in instantiations:
+ raise PLCInvalidArgument, "No such instantiation state"
+
+ return state
+
+ def validate_expires(self, expires):
+ # N.B.: Responsibility of the caller to ensure that expires is
+ # not too far into the future.
+ if expires < time.time():
+ raise PLCInvalidArgument, "Expiration date must be in the future"
+
+ return time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime(expires))
+
+ def validate_creator_person_id(self, person_id):
+ persons = PLC.Persons.Persons(self.api, [person_id])
+ if not persons:
+ raise PLCInvalidArgument, "Invalid creator"
+
+ return person_id
+
+ def sync(self, commit = True):
+ """
+ Flush changes back to the database.
+ """
+
+ try:
+ if not self['name']:
+ raise KeyError
+ except KeyError:
+ raise PLCInvalidArgument, "Slice name must be specified"
+
+ self.validate()
+
+ # Fetch a new slice_id if necessary
+ if 'slice_id' not in self:
+ # N.B.: Responsibility of the caller to ensure that
+ # max_slices is not exceeded.
+ rows = self.api.db.selectall("SELECT NEXTVAL('slices_slice_id_seq') AS slice_id")
+ if not rows:
+ raise PLCDBError, "Unable to fetch new slice_id"
+ self['slice_id'] = rows[0]['slice_id']
+ insert = True
+ else:
+ insert = False
+
+ # Filter out fields that cannot be set or updated directly
+ slices_fields = self.api.db.fields('slices')
+ fields = dict(filter(lambda (key, value): key in slices_fields,
+ self.items()))
+ for ro_field in 'created',:
+ if ro_field in fields:
+ del fields[ro_field]
+
+ # Parameterize for safety
+ keys = fields.keys()
+ values = [self.api.db.param(key, value) for (key, value) in fields.items()]
+
+ if insert:
+ # Insert new row in slices table
+ sql = "INSERT INTO slices (%s) VALUES (%s)" % \
+ (", ".join(keys), ", ".join(values))
+ else:
+ # Update existing row in slices table
+ columns = ["%s = %s" % (key, value) for (key, value) in zip(keys, values)]
+ sql = "UPDATE slices SET " + \
+ ", ".join(columns) + \
+ " WHERE slice_id = %(slice_id)d"
+
+ self.api.db.do(sql, fields)
+
+ if commit:
+ self.api.db.commit()
+
+ def delete(self, commit = True):
+ """
+ Delete existing slice.
+ """
+
+ assert 'slice_id' in self
+
+ # Clean up miscellaneous join tables
+ for table in ['slice_node', 'slice_person', 'slice_attribute']:
+ self.api.db.do("DELETE FROM %s" \
+ " WHERE slice_id = %d" % \
+ (table, self['slice_id']), self)
+
+ # 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_id_or_name_list = None, deleted = False):
+ self.api = api
+
+ sql = "SELECT * FROM view_slices WHERE TRUE"
+
+ if deleted is not None:
+ sql += " AND view_slices.is_deleted IS %(deleted)s"
+
+ if slice_id_or_name_list:
+ # Separate the list into integers and strings
+ slice_ids = filter(lambda slice_id: isinstance(slice_id, (int, long)),
+ slice_id_or_name_list)
+ names = filter(lambda name: isinstance(name, StringTypes),
+ slice_id_or_name_list)
+ sql += " AND (False"
+ if slice_ids:
+ sql += " OR slice_id IN (%s)" % ", ".join(map(str, slice_ids))
+ if names:
+ sql += " OR name IN (%s)" % ", ".join(api.db.quote(names))
+ sql += ")"
+
+ rows = self.api.db.selectall(sql, locals())
+
+ for row in rows:
+ self[row['slice_id']] = slice = Slice(api, row)
+ for aggregate in 'person_ids', 'slice_ids', 'attribute_ids':
+ if not slice.has_key(aggregate) or slice[aggregate] is None:
+ slice[aggregate] = []
+ else:
+ slice[aggregate] = map(int, slice[aggregate].split(','))
git://git.onelab.eu / plcapi.git / commitdiff