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vnc_cassandra.py
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vnc_cassandra.py
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#
# Copyright (c) 2014 Juniper Networks, Inc. All rights reserved.
#
import pycassa
from pycassa import ColumnFamily
from pycassa.batch import Mutator
from pycassa.system_manager import SystemManager, SIMPLE_STRATEGY
from pycassa.pool import AllServersUnavailable, MaximumRetryException
import gevent
from vnc_api import vnc_api
from exceptions import NoIdError, DatabaseUnavailableError
from pysandesh.connection_info import ConnectionState
from pysandesh.gen_py.process_info.ttypes import ConnectionStatus
from pysandesh.gen_py.process_info.ttypes import ConnectionType as ConnType
from pysandesh.gen_py.sandesh.ttypes import SandeshLevel
from sandesh_common.vns.constants import API_SERVER_KEYSPACE_NAME, \
CASSANDRA_DEFAULT_GC_GRACE_SECONDS
import time
from cfgm_common import jsonutils as json
import utils
import datetime
import re
from operator import itemgetter
import itertools
class VncCassandraClient(object):
# Name to ID mapping keyspace + tables
_UUID_KEYSPACE_NAME = API_SERVER_KEYSPACE_NAME
# TODO describe layout
_OBJ_UUID_CF_NAME = 'obj_uuid_table'
# TODO describe layout
_OBJ_FQ_NAME_CF_NAME = 'obj_fq_name_table'
# key: object type, column ($type:$id, uuid)
# where type is entity object is being shared with. Project initially
_OBJ_SHARED_CF_NAME = 'obj_shared_table'
_UUID_KEYSPACE = {_UUID_KEYSPACE_NAME:
[(_OBJ_UUID_CF_NAME, None), (_OBJ_FQ_NAME_CF_NAME, None),
(_OBJ_SHARED_CF_NAME, None)]}
_MAX_COL = 10000000
@classmethod
def get_db_info(cls):
db_info = [(cls._UUID_KEYSPACE_NAME, [cls._OBJ_UUID_CF_NAME,
cls._OBJ_FQ_NAME_CF_NAME,
cls._OBJ_SHARED_CF_NAME])]
return db_info
# end get_db_info
def __init__(self, server_list, db_prefix, rw_keyspaces, ro_keyspaces,
logger, generate_url=None, reset_config=False, credential=None):
self._re_match_parent = re.compile('parent:')
self._re_match_prop = re.compile('prop:')
self._re_match_prop_list = re.compile('propl:')
self._re_match_prop_map = re.compile('propm:')
self._re_match_ref = re.compile('ref:')
self._re_match_backref = re.compile('backref:')
self._re_match_children = re.compile('children:')
self._reset_config = reset_config
self._cache_uuid_to_fq_name = {}
if db_prefix:
self._db_prefix = '%s_' %(db_prefix)
else:
self._db_prefix = ''
self._server_list = server_list
self._num_dbnodes = len(self._server_list)
self._conn_state = ConnectionStatus.INIT
self._logger = logger
self._credential = credential
# if no generate_url is specified, use a dummy function that always
# returns an empty string
self._generate_url = generate_url or (lambda x,y: '')
self._cf_dict = {}
self._ro_keyspaces = ro_keyspaces or {}
self._rw_keyspaces = rw_keyspaces or {}
if ((self._UUID_KEYSPACE_NAME not in self._ro_keyspaces) and
(self._UUID_KEYSPACE_NAME not in self._rw_keyspaces)):
self._ro_keyspaces.update(self._UUID_KEYSPACE)
self._cassandra_init(server_list)
self._cache_uuid_to_fq_name = {}
self._obj_uuid_cf = self._cf_dict[self._OBJ_UUID_CF_NAME]
self._obj_fq_name_cf = self._cf_dict[self._OBJ_FQ_NAME_CF_NAME]
self._obj_shared_cf = self._cf_dict[self._OBJ_SHARED_CF_NAME]
# end __init__
def get_cf(self, cf_name):
return self._cf_dict.get(cf_name)
#end
def add(self, cf_name, key, value):
try:
self.get_cf(cf_name).insert(key, value)
return True
except:
return False
#end
def get(self, cf_name, key):
try:
return self.get_cf(cf_name).get(key)
except:
return None
#end
def delete(self, cf_name, key):
try:
self.get_cf(cf_name).remove(key)
return True
except:
return False
#end
def get_range(self, cf_name):
try:
return self.get_cf(cf_name).get_range(column_count=100000)
except:
return None
#end
def _create_prop(self, bch, obj_uuid, prop_name, prop_val):
bch.insert(obj_uuid, {'prop:%s' % (prop_name): json.dumps(prop_val)})
# end _create_prop
def _update_prop(self, bch, obj_uuid, prop_name, new_props):
if new_props[prop_name] is None:
bch.remove(obj_uuid, columns=['prop:' + prop_name])
else:
bch.insert(
obj_uuid,
{'prop:' + prop_name: json.dumps(new_props[prop_name])})
# prop has been accounted for, remove so only new ones remain
del new_props[prop_name]
# end _update_prop
def _add_to_prop_list(self, bch, obj_uuid, prop_name,
prop_elem_value, prop_elem_position):
bch.insert(obj_uuid,
{'propl:%s:%s' %(prop_name, prop_elem_position):
json.dumps(prop_elem_value)})
# end _add_to_prop_list
def _delete_from_prop_list(self, bch, obj_uuid, prop_name,
prop_elem_position):
bch.remove(obj_uuid,
columns=['propl:%s:%s' %(prop_name, prop_elem_position)])
# end _delete_from_prop_list
def _set_in_prop_map(self, bch, obj_uuid, prop_name,
prop_elem_value, prop_elem_position):
bch.insert(obj_uuid,
{'propm:%s:%s' %(prop_name, prop_elem_position):
json.dumps(prop_elem_value)})
# end _set_in_prop_map
def _delete_from_prop_map(self, bch, obj_uuid, prop_name,
prop_elem_position):
bch.remove(obj_uuid,
columns=['propm:%s:%s' %(prop_name, prop_elem_position)])
# end _delete_from_prop_map
def _create_child(self, bch, parent_type, parent_uuid,
child_type, child_uuid):
child_col = {'children:%s:%s' %
(child_type, child_uuid): json.dumps(None)}
bch.insert(parent_uuid, child_col)
parent_col = {'parent:%s:%s' %
(parent_type, parent_uuid): json.dumps(None)}
bch.insert(child_uuid, parent_col)
# end _create_child
def _delete_child(self, bch, parent_type, parent_uuid,
child_type, child_uuid):
child_col = {'children:%s:%s' %
(child_type, child_uuid): json.dumps(None)}
bch.remove(parent_uuid, columns=[
'children:%s:%s' % (child_type, child_uuid)])
# end _delete_child
def _create_ref(self, bch, obj_type, obj_uuid, ref_type,
ref_uuid, ref_data):
bch.insert(
obj_uuid, {'ref:%s:%s' %
(ref_type, ref_uuid): json.dumps(ref_data)})
if obj_type == ref_type:
bch.insert(
ref_uuid, {'ref:%s:%s' %
(obj_type, obj_uuid): json.dumps(ref_data)})
else:
bch.insert(
ref_uuid, {'backref:%s:%s' %
(obj_type, obj_uuid): json.dumps(ref_data)})
# end _create_ref
def _update_ref(self, bch, obj_type, obj_uuid, ref_type,
old_ref_uuid, new_ref_infos):
if ref_type not in new_ref_infos:
# update body didn't touch this type, nop
return
if old_ref_uuid not in new_ref_infos[ref_type]:
# remove old ref
bch.remove(obj_uuid, columns=[
'ref:%s:%s' % (ref_type, old_ref_uuid)])
if obj_type == ref_type:
bch.remove(old_ref_uuid, columns=[
'ref:%s:%s' % (obj_type, obj_uuid)])
else:
bch.remove(old_ref_uuid, columns=[
'backref:%s:%s' % (obj_type, obj_uuid)])
else:
# retain old ref with new ref attr
new_ref_data = new_ref_infos[ref_type][old_ref_uuid]
bch.insert(
obj_uuid,
{'ref:%s:%s' %
(ref_type, old_ref_uuid): json.dumps(new_ref_data)})
if obj_type == ref_type:
bch.insert(
old_ref_uuid,
{'ref:%s:%s' %
(obj_type, obj_uuid): json.dumps(new_ref_data)})
else:
bch.insert(
old_ref_uuid,
{'backref:%s:%s' %
(obj_type, obj_uuid): json.dumps(new_ref_data)})
# uuid has been accounted for, remove so only new ones remain
del new_ref_infos[ref_type][old_ref_uuid]
# end _update_ref
def _delete_ref(self, bch, obj_type, obj_uuid, ref_type, ref_uuid):
send = False
if bch is None:
send = True
bch = self._cassandra_db._obj_uuid_cf.batch()
bch.remove(obj_uuid, columns=['ref:%s:%s' % (ref_type, ref_uuid)])
if obj_type == ref_type:
bch.remove(ref_uuid, columns=[
'ref:%s:%s' % (obj_type, obj_uuid)])
else:
bch.remove(ref_uuid, columns=[
'backref:%s:%s' % (obj_type, obj_uuid)])
if send:
bch.send()
# end _delete_ref
def _update_sandesh_status(self, status, msg=''):
ConnectionState.update(conn_type=ConnType.DATABASE,
name='Cassandra', status=status, message=msg,
server_addrs=self._server_list)
def _handle_exceptions(self, func):
def wrapper(*args, **kwargs):
try:
if self._conn_state != ConnectionStatus.UP:
# will set conn_state to UP if successful
self._cassandra_init_conn_pools()
return func(*args, **kwargs)
except (AllServersUnavailable, MaximumRetryException) as e:
if self._conn_state != ConnectionStatus.DOWN:
self._update_sandesh_status(ConnectionStatus.DOWN)
msg = 'Cassandra connection down. Exception in %s' %(
str(func))
self._logger(msg, level=SandeshLevel.SYS_ERR)
self._conn_state = ConnectionStatus.DOWN
raise DatabaseUnavailableError(
'Error, %s: %s' %(str(e), utils.detailed_traceback()))
return wrapper
# end _handle_exceptions
# Helper routines for cassandra
def _cassandra_init(self, server_list):
# 1. Ensure keyspace and schema/CFs exist
# 2. Read in persisted data and publish to ifmap server
self._update_sandesh_status(ConnectionStatus.INIT)
ColumnFamily.get = self._handle_exceptions(ColumnFamily.get)
ColumnFamily.multiget = self._handle_exceptions(ColumnFamily.multiget)
ColumnFamily.xget = self._handle_exceptions(ColumnFamily.xget)
ColumnFamily.get_range = self._handle_exceptions(ColumnFamily.get_range)
ColumnFamily.insert = self._handle_exceptions(ColumnFamily.insert)
ColumnFamily.remove = self._handle_exceptions(ColumnFamily.remove)
Mutator.send = self._handle_exceptions(Mutator.send)
self.sys_mgr = self._cassandra_system_manager()
self.existing_keyspaces = self.sys_mgr.list_keyspaces()
for ks,cf_list in self._rw_keyspaces.items():
keyspace = '%s%s' %(self._db_prefix, ks)
self._cassandra_ensure_keyspace(keyspace, cf_list)
for ks,cf_list in self._ro_keyspaces.items():
keyspace = '%s%s' %(self._db_prefix, ks)
self._cassandra_wait_for_keyspace(keyspace)
self._cassandra_init_conn_pools()
# end _cassandra_init
def _cassandra_system_manager(self):
# Retry till cassandra is up
server_idx = 0
connected = False
while not connected:
try:
cass_server = self._server_list[server_idx]
sys_mgr = SystemManager(cass_server,
credentials=self._credential)
connected = True
except Exception:
# TODO do only for
# thrift.transport.TTransport.TTransportException
server_idx = (server_idx + 1) % self._num_dbnodes
time.sleep(3)
return sys_mgr
# end _cassandra_system_manager
def _cassandra_wait_for_keyspace(self, keyspace):
# Wait for it to be created by another process
while keyspace not in self.existing_keyspaces:
gevent.sleep(1)
self._logger("Waiting for keyspace %s to be created" % keyspace,
level=SandeshLevel.SYS_NOTICE)
self.existing_keyspaces = self.sys_mgr.list_keyspaces()
# end _cassandra_wait_for_keyspace
def _cassandra_ensure_keyspace(self, keyspace_name, cf_info_list):
if self._reset_config and keyspace_name in self.existing_keyspaces:
try:
self.sys_mgr.drop_keyspace(keyspace_name)
except pycassa.cassandra.ttypes.InvalidRequestException as e:
# TODO verify only EEXISTS
self._logger(str(e), level=SandeshLevel.SYS_NOTICE)
if (self._reset_config or keyspace_name not in self.existing_keyspaces):
try:
self.sys_mgr.create_keyspace(keyspace_name, SIMPLE_STRATEGY,
{'replication_factor': str(self._num_dbnodes)})
except pycassa.cassandra.ttypes.InvalidRequestException as e:
# TODO verify only EEXISTS
self._logger("Warning! " + str(e), level=SandeshLevel.SYS_WARN)
gc_grace_sec = CASSANDRA_DEFAULT_GC_GRACE_SECONDS
for cf_info in cf_info_list:
try:
(cf_name, comparator_type) = cf_info
if comparator_type:
self.sys_mgr.create_column_family(
keyspace_name, cf_name,
comparator_type=comparator_type,
gc_grace_seconds=gc_grace_sec,
default_validation_class='UTF8Type')
else:
self.sys_mgr.create_column_family(keyspace_name, cf_name,
gc_grace_seconds=gc_grace_sec,
default_validation_class='UTF8Type')
except pycassa.cassandra.ttypes.InvalidRequestException as e:
# TODO verify only EEXISTS
self._logger("Warning! " + str(e), level=SandeshLevel.SYS_WARN)
self.sys_mgr.alter_column_family(keyspace_name, cf_name,
gc_grace_seconds=gc_grace_sec,
default_validation_class='UTF8Type')
# end _cassandra_ensure_keyspace
def _cassandra_init_conn_pools(self):
for ks,cf_list in itertools.chain(self._rw_keyspaces.items(),
self._ro_keyspaces.items()):
keyspace = '%s%s' %(self._db_prefix, ks)
pool = pycassa.ConnectionPool(
keyspace, self._server_list, max_overflow=-1, use_threadlocal=True,
prefill=True, pool_size=20, pool_timeout=120,
max_retries=30, timeout=5, credentials=self._credential)
rd_consistency = pycassa.cassandra.ttypes.ConsistencyLevel.QUORUM
wr_consistency = pycassa.cassandra.ttypes.ConsistencyLevel.QUORUM
for (cf, _) in cf_list:
self._cf_dict[cf] = ColumnFamily(
pool, cf, read_consistency_level = rd_consistency,
write_consistency_level = wr_consistency)
ConnectionState.update(conn_type = ConnType.DATABASE,
name = 'Cassandra', status = ConnectionStatus.UP, message = '',
server_addrs = self._server_list)
self._conn_state = ConnectionStatus.UP
msg = 'Cassandra connection ESTABLISHED'
self._logger(msg, level=SandeshLevel.SYS_NOTICE)
# end _cassandra_init_conn_pools
def _get_resource_class(self, obj_type):
cls_name = '%s' %(utils.CamelCase(obj_type.replace('-', '_')))
return getattr(vnc_api, cls_name)
# end _get_resource_class
def _get_xsd_class(self, xsd_type):
return getattr(vnc_api, xsd_type)
# end _get_xsd_class
def object_create(self, res_type, obj_id, obj_dict):
obj_type = res_type.replace('-', '_')
obj_class = self._get_resource_class(obj_type)
# Gather column values for obj and updates to backrefs
# in a batch and write it at the end
bch = self._obj_uuid_cf.batch()
obj_cols = {}
obj_cols['fq_name'] = json.dumps(obj_dict['fq_name'])
obj_cols['type'] = json.dumps(obj_type)
if 'parent_type' in obj_dict:
# non config-root child
parent_type = obj_dict['parent_type']
if parent_type not in obj_class.parent_types:
return False, (400, 'Invalid parent type: %s' % parent_type)
parent_method_type = parent_type.replace('-', '_')
parent_fq_name = obj_dict['fq_name'][:-1]
obj_cols['parent_type'] = json.dumps(parent_type)
parent_uuid = self.fq_name_to_uuid(parent_method_type, parent_fq_name)
self._create_child(bch, parent_method_type, parent_uuid, obj_type, obj_id)
# Properties
for prop_field in obj_class.prop_fields:
field = obj_dict.get(prop_field)
# Specifically checking for None
if field is None:
continue
if prop_field == 'id_perms':
field['created'] = datetime.datetime.utcnow().isoformat()
field['last_modified'] = field['created']
if prop_field in obj_class.prop_list_fields:
# store list elements in list order
# iterate on wrapped element or directly or prop field
if obj_class.prop_list_field_has_wrappers[prop_field]:
wrapper_field = field.keys()[0]
list_coll = field[wrapper_field]
else:
list_coll = field
for i in range(len(list_coll)):
self._add_to_prop_list(
bch, obj_id, prop_field, list_coll[i], str(i))
elif prop_field in obj_class.prop_map_fields:
# iterate on wrapped element or directly or prop field
if obj_class.prop_map_field_has_wrappers[prop_field]:
wrapper_field = field.keys()[0]
map_coll = field[wrapper_field]
else:
map_coll = field
map_key_name = obj_class.prop_map_field_key_names[prop_field]
for map_elem in map_coll:
map_key = map_elem[map_key_name]
self._set_in_prop_map(
bch, obj_id, prop_field, map_elem, map_key)
else:
self._create_prop(bch, obj_id, prop_field, field)
# References
# e.g. ref_field = 'network_ipam_refs'
# ref_type = 'network-ipam'
# ref_link_type = 'VnSubnetsType'
# is_weakref = False
for ref_field in obj_class.ref_fields:
ref_type, ref_link_type, _ = obj_class.ref_field_types[ref_field]
refs = obj_dict.get(ref_field, [])
for ref in refs:
ref_uuid = self.fq_name_to_uuid(ref_type, ref['to'])
ref_attr = ref.get('attr')
ref_data = {'attr': ref_attr, 'is_weakref': False}
self._create_ref(bch, obj_type, obj_id,
ref_type.replace('-', '_'), ref_uuid, ref_data)
bch.insert(obj_id, obj_cols)
bch.send()
# Update fqname table
fq_name_str = ':'.join(obj_dict['fq_name'])
fq_name_cols = {utils.encode_string(fq_name_str) + ':' + obj_id:
json.dumps(None)}
self._obj_fq_name_cf.insert(obj_type, fq_name_cols)
return (True, '')
# end object_create
def object_read(self, res_type, obj_uuids, field_names=None):
# if field_names=None, all fields will be read/returned
obj_type = res_type.replace('-', '_')
obj_class = self._get_resource_class(obj_type)
obj_uuid_cf = self._obj_uuid_cf
# optimize for common case of reading non-backref, non-children fields
# ignoring columns starting from 'b' and 'c' - significant performance
# impact in scaled setting. e.g. read of project
if (field_names is None or
(set(field_names) & (obj_class.backref_fields |
obj_class.children_fields))):
# atleast one backref/children field is needed
obj_rows = obj_uuid_cf.multiget(obj_uuids,
column_count=self._MAX_COL,
include_timestamp=True)
else: # ignore reading backref + children columns
obj_rows = obj_uuid_cf.multiget(obj_uuids,
column_start='d',
column_count=self._MAX_COL,
include_timestamp=True)
if (len(obj_uuids) == 1) and not obj_rows:
raise NoIdError(obj_uuids[0])
results = []
for row_key in obj_rows:
obj_uuid = row_key
obj_cols = obj_rows[obj_uuid]
if obj_type != json.loads(obj_cols['type'][0]):
continue
result = {}
result['uuid'] = obj_uuid
result['fq_name'] = json.loads(obj_cols['fq_name'][0])
for col_name in obj_cols.keys():
if self._re_match_parent.match(col_name):
# non config-root child
(_, _, parent_uuid) = col_name.split(':')
parent_type = json.loads(obj_cols['parent_type'][0])
result['parent_type'] = parent_type
try:
result['parent_uuid'] = parent_uuid
result['parent_href'] = self._generate_url(parent_type,
parent_uuid)
except NoIdError:
err_msg = 'Unknown uuid for parent ' + result['fq_name'][-2]
return (False, err_msg)
if self._re_match_prop.match(col_name):
(_, prop_name) = col_name.split(':')
result[prop_name] = json.loads(obj_cols[col_name][0])
if (self._re_match_prop_list.match(col_name) or
self._re_match_prop_map.match(col_name)):
(_, prop_name, prop_elem_position) = col_name.split(':')
if self._re_match_prop_list.match(col_name):
has_wrapper = \
obj_class.prop_list_field_has_wrappers[prop_name]
else:
has_wrapper = \
obj_class.prop_map_field_has_wrappers[prop_name]
if has_wrapper:
prop_field_types = obj_class.prop_field_types[prop_name]
wrapper_type = prop_field_types['xsd_type']
wrapper_cls = self._get_xsd_class(wrapper_type)
wrapper_field = wrapper_cls.attr_fields[0]
if prop_name not in result:
result[prop_name] = {wrapper_field: []}
result[prop_name][wrapper_field].append(
json.loads(obj_cols[col_name][0]))
else:
if prop_name not in result:
result[prop_name] = []
result[prop_name].append(
json.loads(obj_cols[col_name][0]))
if self._re_match_children.match(col_name):
(_, child_type, child_uuid) = col_name.split(':')
if field_names and '%ss' %(child_type) not in field_names:
continue
child_tstamp = obj_cols[col_name][1]
try:
self._read_child(result, obj_uuid, child_type,
child_uuid, child_tstamp)
except NoIdError:
continue
if self._re_match_ref.match(col_name):
(_, ref_type, ref_uuid) = col_name.split(':')
self._read_ref(result, obj_uuid, ref_type, ref_uuid,
obj_cols[col_name][0])
if self._re_match_backref.match(col_name):
(_, back_ref_type, back_ref_uuid) = col_name.split(':')
if (field_names and
'%s_back_refs' %(back_ref_type) not in field_names):
continue
try:
self._read_back_ref(result, obj_uuid, back_ref_type,
back_ref_uuid, obj_cols[col_name][0])
except NoIdError:
continue
# for all column names
# sort children by creation time
for child_field in obj_class.children_fields:
if child_field not in result:
continue
sorted_children = sorted(result[child_field],
key = itemgetter('tstamp'))
# re-write result's children without timestamp
result[child_field] = sorted_children
[child.pop('tstamp') for child in result[child_field]]
# for all children
results.append(result)
# end for all rows
return (True, results)
# end object_read
def object_count_children(self, res_type, obj_uuid, child_type):
if child_type is None:
return (False, '')
obj_type = res_type.replace('-', '_')
obj_class = self._get_resource_class(obj_type)
obj_uuid_cf = self._obj_uuid_cf
if child_type not in obj_class.children_fields:
return (False,
'%s is not a child type of %s' %(child_type, obj_type))
col_start = 'children:'+child_type[:-1]+':'
col_finish = 'children:'+child_type[:-1]+';'
num_children = obj_uuid_cf.get_count(obj_uuid,
column_start=col_start,
column_finish=col_finish,
max_count=self._MAX_COL)
return (True, num_children)
# end object_count_children
def update_last_modified(self, bch, obj_uuid, id_perms=None):
if id_perms is None:
id_perms = json.loads(
self._obj_uuid_cf.get(obj_uuid,
['prop:id_perms'])['prop:id_perms'])
id_perms['last_modified'] = datetime.datetime.utcnow().isoformat()
self._update_prop(bch, obj_uuid, 'id_perms', {'id_perms': id_perms})
# end update_last_modified
def object_update(self, res_type, obj_uuid, new_obj_dict):
obj_type = res_type.replace('-', '_')
obj_class = self._get_resource_class(obj_type)
# Grab ref-uuids and properties in new version
new_ref_infos = {}
# Properties
new_props = {}
for prop_field in obj_class.prop_fields:
if prop_field in new_obj_dict:
new_props[prop_field] = new_obj_dict[prop_field]
# References
# e.g. ref_field = 'network_ipam_refs'
# ref_type = 'network-ipam'
# ref_link_type = 'VnSubnetsType'
# is_weakref = False
for ref_field in obj_class.ref_fields:
ref_type, ref_link_type, is_weakref = \
obj_class.ref_field_types[ref_field]
ref_obj_type = ref_type.replace('-', '_')
if ref_field in new_obj_dict:
new_refs = new_obj_dict[ref_field]
new_ref_infos[ref_obj_type] = {}
for new_ref in new_refs or []:
new_ref_uuid = self.fq_name_to_uuid(ref_type, new_ref['to'])
new_ref_attr = new_ref.get('attr')
new_ref_data = {'attr': new_ref_attr, 'is_weakref': is_weakref}
new_ref_infos[ref_obj_type][new_ref_uuid] = new_ref_data
# Gather column values for obj and updates to backrefs
# in a batch and write it at the end
obj_uuid_cf = self._obj_uuid_cf
obj_cols_iter = obj_uuid_cf.xget(obj_uuid)
# TODO optimize this (converts tuple to dict)
obj_cols = {}
for col_info in obj_cols_iter:
obj_cols[col_info[0]] = col_info[1]
bch = obj_uuid_cf.batch()
for col_name in obj_cols.keys():
if self._re_match_prop.match(col_name):
(_, prop_name) = col_name.split(':')
if prop_name == 'id_perms':
# id-perms always has to be updated for last-mod timestamp
# get it from request dict(or from db if not in request dict)
new_id_perms = new_obj_dict.get(
prop_name, json.loads(obj_cols[col_name]))
self.update_last_modified(bch, obj_uuid, new_id_perms)
elif prop_name in new_obj_dict:
self._update_prop(bch, obj_uuid, prop_name, new_props)
if self._re_match_prop_list.match(col_name):
(_, prop_name, prop_elem_position) = col_name.split(':')
if prop_name in new_props:
# delete all old values of prop list
self._delete_from_prop_list(
bch, obj_uuid, prop_name, prop_elem_position)
if self._re_match_prop_map.match(col_name):
(_, prop_name, prop_elem_position) = col_name.split(':')
if prop_name in new_props:
# delete all old values of prop list
self._delete_from_prop_map(
bch, obj_uuid, prop_name, prop_elem_position)
if self._re_match_ref.match(col_name):
(_, ref_type, ref_uuid) = col_name.split(':')
self._update_ref(bch, obj_type, obj_uuid, ref_type, ref_uuid,
new_ref_infos)
# for all column names
# create new refs
for ref_type in new_ref_infos.keys():
for ref_uuid in new_ref_infos[ref_type].keys():
ref_data = new_ref_infos[ref_type][ref_uuid]
self._create_ref(bch, obj_type, obj_uuid, ref_type, ref_uuid,
ref_data)
# create new props
for prop_name in new_props.keys():
if prop_name in obj_class.prop_list_fields:
# store list elements in list order
# iterate on wrapped element or directly on prop field
# for wrapped lists, store without the wrapper. regenerate
# wrapper on read
if obj_class.prop_list_field_has_wrappers[prop_name]:
wrapper_field = new_props[prop_name].keys()[0]
list_coll = new_props[prop_name][wrapper_field]
else:
list_coll = new_props[prop_name]
for i in range(len(list_coll)):
self._add_to_prop_list(bch, obj_uuid,
prop_name, list_coll[i], str(i))
elif prop_name in obj_class.prop_map_fields:
# store map elements in key order
# iterate on wrapped element or directly on prop field
# for wrapped lists, store without the wrapper. regenerate
# wrapper on read
if obj_class.prop_map_field_has_wrappers[prop_name]:
wrapper_field = new_props[prop_name].keys()[0]
map_coll = new_props[prop_name][wrapper_field]
else:
map_coll = new_props[prop_name]
map_key_name = obj_class.prop_map_field_key_names[prop_name]
for map_elem in map_coll:
map_key = map_elem[map_key_name]
self._set_in_prop_map(bch, obj_uuid,
prop_name, map_elem, map_key)
else:
self._create_prop(bch, obj_uuid, prop_name, new_props[prop_name])
bch.send()
return (True, '')
# end object_update
def object_list(self, res_type, parent_uuids=None, back_ref_uuids=None,
obj_uuids=None, count=False, filters=None):
obj_type = res_type.replace('-', '_')
obj_class = self._get_resource_class(obj_type)
children_fq_names_uuids = []
if filters:
fnames = filters.get('field_names', [])
fvalues = filters.get('field_values', [])
filter_fields = [(fnames[i], fvalues[i]) for i in range(len(fnames))]
else:
filter_fields = []
def filter_rows(coll_infos, filter_cols, filter_params):
filt_infos = {}
coll_rows = obj_uuid_cf.multiget(coll_infos.keys(),
columns=filter_cols,
column_count=self._MAX_COL)
for row in coll_rows:
# give chance for zk heartbeat/ping
gevent.sleep(0)
full_match = True
for fname, fval in filter_params:
if coll_rows[row]['prop:%s' %(fname)] != fval:
full_match = False
break
if full_match:
filt_infos[row] = coll_infos[row]
return filt_infos
# end filter_rows
def get_fq_name_uuid_list(obj_uuids):
ret_list = []
for obj_uuid in obj_uuids:
try:
if obj_type != self.uuid_to_obj_type(obj_uuid):
continue
obj_fq_name = self.uuid_to_fq_name(obj_uuid)
ret_list.append((obj_fq_name, obj_uuid))
except NoIdError:
pass
return ret_list
# end get_fq_name_uuid_list
if parent_uuids:
# go from parent to child
obj_uuid_cf = self._obj_uuid_cf
col_start = 'children:%s:' %(obj_type)
col_fin = 'children:%s;' %(obj_type)
try:
obj_rows = obj_uuid_cf.multiget(parent_uuids,
column_start=col_start,
column_finish=col_fin,
column_count=self._MAX_COL,
include_timestamp=True)
except pycassa.NotFoundException:
if count:
return (True, 0)
else:
return (True, children_fq_names_uuids)
def filter_rows_parent_anchor(sort=False):
# flatten to [('children:<type>:<uuid>', (<val>,<ts>), *]
all_cols = [cols for obj_key in obj_rows.keys()
for cols in obj_rows[obj_key].items()]
all_child_infos = {}
for col_name, col_val_ts in all_cols:
# give chance for zk heartbeat/ping
gevent.sleep(0)
child_uuid = col_name.split(':')[2]
if obj_uuids and child_uuid not in obj_uuids:
continue
all_child_infos[child_uuid] = {'uuid': child_uuid,
'tstamp': col_val_ts[1]}
filter_cols = ['prop:%s' %(fname) for fname, _ in filter_fields]
if filter_cols:
filt_child_infos = filter_rows(all_child_infos, filter_cols,
filter_fields)
else: # no filter specified
filt_child_infos = all_child_infos
if not sort:
ret_child_infos = filt_child_infos.values()
else:
ret_child_infos = sorted(filt_child_infos.values(),
key=itemgetter('tstamp'))
return get_fq_name_uuid_list(r['uuid'] for r in ret_child_infos)
# end filter_rows_parent_anchor
if count:
return (True, len(filter_rows_parent_anchor()))
children_fq_names_uuids = filter_rows_parent_anchor(sort=True)
if back_ref_uuids:
# go from anchor to backrefs
obj_uuid_cf = self._obj_uuid_cf
col_start = 'backref:%s:' %(obj_type)
col_fin = 'backref:%s;' %(obj_type)
try:
obj_rows = obj_uuid_cf.multiget(back_ref_uuids,
column_start=col_start,
column_finish=col_fin,
column_count=self._MAX_COL,
include_timestamp=True)
except pycassa.NotFoundException:
if count:
return (True, 0)
else:
return (True, children_fq_names_uuids)
def filter_rows_backref_anchor():
# flatten to [('backref:<obj-type>:<uuid>', (<val>,<ts>), *]
all_cols = [cols for obj_key in obj_rows.keys()
for cols in obj_rows[obj_key].items()]
all_backref_infos = {}
for col_name, col_val_ts in all_cols:
# give chance for zk heartbeat/ping
gevent.sleep(0)
backref_uuid = col_name.split(':')[2]
if obj_uuids and backref_uuid not in obj_uuids:
continue
all_backref_infos[backref_uuid] = \
{'uuid': backref_uuid, 'tstamp': col_val_ts[1]}
filter_cols = ['prop:%s' %(fname) for fname, _ in filter_fields]
if filter_cols:
filt_backref_infos = filter_rows(
all_backref_infos, filter_cols, filter_fields)
else: # no filter specified
filt_backref_infos = all_backref_infos
return get_fq_name_uuid_list(r['uuid'] for r in
filt_backref_infos.values())
# end filter_rows_backref_anchor
if count:
return (True, len(filter_rows_backref_anchor()))
children_fq_names_uuids = filter_rows_backref_anchor()
if not parent_uuids and not back_ref_uuids:
obj_uuid_cf = self._obj_uuid_cf
if obj_uuids:
# exact objects specified
def filter_rows_object_list():
all_obj_infos = {}
for obj_uuid in obj_uuids:
all_obj_infos[obj_uuid] = None
filter_cols = ['prop:%s' %(fname)
for fname, _ in filter_fields]
if filter_cols:
filt_obj_infos = filter_rows(
all_obj_infos, filter_cols, filter_fields)
else: # no filters specified
filt_obj_infos = all_obj_infos
return get_fq_name_uuid_list(filt_obj_infos.keys())
# end filter_rows_object_list
if count:
return (True, len(filter_rows_object_list()))
children_fq_names_uuids = filter_rows_object_list()
else: # grab all resources of this type
obj_fq_name_cf = self._obj_fq_name_cf
try:
cols = obj_fq_name_cf.get('%s' %(obj_type),
column_count=self._MAX_COL)
except pycassa.NotFoundException:
if count:
return (True, 0)
else:
return (True, children_fq_names_uuids)
def filter_rows_no_anchor():
all_obj_infos = {}
for col_name, col_val in cols.items():
# give chance for zk heartbeat/ping
gevent.sleep(0)
col_name_arr = utils.decode_string(col_name).split(':')
obj_uuid = col_name_arr[-1]
all_obj_infos[obj_uuid] = (col_name_arr[:-1], obj_uuid)
filter_cols = ['prop:%s' %(fname) for fname, _ in filter_fields]
if filter_cols:
filt_obj_infos = filter_rows(all_obj_infos, filter_cols,
filter_fields)
else: # no filters specified
filt_obj_infos = all_obj_infos
return filt_obj_infos.values()
# end filter_rows_no_anchor
if count:
return (True, len(filter_rows_no_anchor()))
children_fq_names_uuids = filter_rows_no_anchor()
return (True, children_fq_names_uuids)
# end object_list
def object_delete(self, res_type, obj_uuid):
obj_type = res_type.replace('-', '_')
obj_class = self._get_resource_class(obj_type)
obj_uuid_cf = self._obj_uuid_cf
try:
fq_name = json.loads(
obj_uuid_cf.get(obj_uuid, columns=['fq_name'])['fq_name'])
except pycassa.NotFoundException:
raise NoIdError(obj_uuid)
bch = obj_uuid_cf.batch()
# unlink from parent
col_start = 'parent:'
col_fin = 'parent;'
col_name_iter = obj_uuid_cf.xget(
obj_uuid, column_start=col_start, column_finish=col_fin)
for (col_name, col_val) in col_name_iter:
(_, parent_type, parent_uuid) = col_name.split(':')
self._delete_child(
bch, parent_type, parent_uuid, obj_type, obj_uuid)
# remove refs