2 # implements support for SFA records stored in db tables
4 # TODO: Use existing PLC database methods? or keep this separate?
6 from types import StringTypes
8 from sfa.util.config import Config
10 from sfa.storage.parameter import Parameter
11 from sfa.storage.filter import Filter
12 from sfa.storage.PostgreSQL import PostgreSQL
13 from sfa.storage.record import SfaRecord, AuthorityRecord, NodeRecord, SliceRecord, UserRecord
17 SFA_TABLE_PREFIX = "records"
19 def __init__(self, record_filter = None):
21 # pgsql doesn't like table names with "." in them, to replace it with "$"
22 self.tablename = SfaTable.SFA_TABLE_PREFIX
23 self.config = Config()
24 self.db = PostgreSQL(self.config)
27 records = self.find(record_filter)
28 for record in records:
31 def db_fields(self, obj=None):
33 db_fields = self.db.fields(self.SFA_TABLE_PREFIX)
34 return dict( [ (key,value) for (key, value) in obj.iteritems() \
35 if key in db_fields and
36 self.is_writable(key, value, SfaRecord.fields)] )
39 def is_writable (key,value,dict):
40 # if not mentioned, assume it's writable (e.g. deleted ...)
41 if key not in dict: return True
42 # if mentioned but not linked to a Parameter object, idem
43 if not isinstance(dict[key], Parameter): return True
44 # if not marked ro, it's writable
45 if not dict[key].ro: return True
51 self.db.do("DELETE from %s"%self.tablename)
58 def remove(self, record):
59 params = {'record_id': record['record_id']}
60 template = "DELETE FROM %s " % self.tablename
61 sql = template + "WHERE record_id = %(record_id)s"
62 self.db.do(sql, params)
64 # if this is a site, remove all records where 'authority' == the
66 if record['type'] == 'authority':
67 params = {'authority': record['hrn']}
68 sql = template + "WHERE authority = %(authority)s"
69 self.db.do(sql, params)
72 def insert(self, record):
73 db_fields = self.db_fields(record)
74 keys = db_fields.keys()
75 values = [self.db.param(key, value) for (key, value) in db_fields.iteritems()]
76 query_str = "INSERT INTO " + self.tablename + \
77 "(" + ",".join(keys) + ") " + \
78 "VALUES(" + ",".join(values) + ")"
79 self.db.do(query_str, db_fields)
81 result = self.find({'hrn': record['hrn'], 'type': record['type'], 'peer_authority': record['peer_authority']})
84 elif isinstance(result, list):
85 record_id = result[0]['record_id']
87 record_id = result['record_id']
91 def update(self, record):
92 db_fields = self.db_fields(record)
93 keys = db_fields.keys()
94 values = [self.db.param(key, value) for (key, value) in db_fields.iteritems()]
95 columns = ["%s = %s" % (key, value) for (key, value) in zip(keys, values)]
96 query_str = "UPDATE %s SET %s WHERE record_id = %s" % \
97 (self.tablename, ", ".join(columns), record['record_id'])
98 self.db.do(query_str, db_fields)
101 def quote_string(self, value):
102 return str(self.db.quote(value))
104 def quote(self, value):
105 return self.db.quote(value)
107 def find(self, record_filter = None, columns=None):
111 columns = ",".join(columns)
112 sql = "SELECT %s FROM %s WHERE True " % (columns, self.tablename)
114 if isinstance(record_filter, (list, tuple, set)):
115 ints = filter(lambda x: isinstance(x, (int, long)), record_filter)
116 strs = filter(lambda x: isinstance(x, StringTypes), record_filter)
117 record_filter = Filter(SfaRecord.all_fields, {'record_id': ints, 'hrn': strs})
118 sql += "AND (%s) %s " % record_filter.sql("OR")
119 elif isinstance(record_filter, dict):
120 record_filter = Filter(SfaRecord.all_fields, record_filter)
121 sql += " AND (%s) %s" % record_filter.sql("AND")
122 elif isinstance(record_filter, StringTypes):
123 record_filter = Filter(SfaRecord.all_fields, {'hrn':[record_filter]})
124 sql += " AND (%s) %s" % record_filter.sql("AND")
125 elif isinstance(record_filter, int):
126 record_filter = Filter(SfaRecord.all_fields, {'record_id':[record_filter]})
127 sql += " AND (%s) %s" % record_filter.sql("AND")
129 results = self.db.selectall(sql)
130 if isinstance(results, dict):
134 def findObjects(self, record_filter = None, columns=None):
136 results = self.find(record_filter, columns)
138 for result in results:
139 if result['type'] in ['authority']:
140 result_rec_list.append(AuthorityRecord(dict=result))
141 elif result['type'] in ['node']:
142 result_rec_list.append(NodeRecord(dict=result))
143 elif result['type'] in ['slice']:
144 result_rec_list.append(SliceRecord(dict=result))
145 elif result['type'] in ['user']:
146 result_rec_list.append(UserRecord(dict=result))
148 result_rec_list.append(SfaRecord(dict=result))
149 return result_rec_list