2 # implements support for SFA records stored in db tables
4 # TODO: Use existing PLC database methods? or keep this separate?
6 from sfa.util.PostgreSQL import *
7 from sfa.trust.gid import *
8 from sfa.util.record import *
9 from sfa.util.config import *
10 from sfa.util.filter import *
14 SFA_TABLE_PREFIX = "sfa"
16 def __init__(self, record_filter = None):
18 # pgsql doesn't like table names with "." in them, to replace it with "$"
19 self.tablename = SfaTable.SFA_TABLE_PREFIX
20 self.config = Config()
21 self.db = PostgreSQL(self.config)
24 records = self.find(record_filter)
25 for record in records:
29 sql = "SELECT * from pg_tables"
30 tables = self.db.selectall(sql)
31 tables = filter(lambda row: row['tablename'].startswith(self.SFA_TABLE_PREFIX), tables)
35 def db_fields(self, obj=None):
37 db_fields = self.db.fields(self.SFA_TABLE_PREFIX)
38 return dict( [ (key,value) for (key, value) in obj.iteritems() \
39 if key in db_fields and
40 self.is_writable(key, value, SfaRecord.fields)] )
43 def is_writable (key,value,dict):
44 # if not mentioned, assume it's writable (e.g. deleted ...)
45 if key not in dict: return True
46 # if mentioned but not linked to a Parameter object, idem
47 if not isinstance(dict[key], Parameter): return True
48 # if not marked ro, it's writable
49 if not dict[key].ro: return True
56 querystr = "CREATE TABLE " + self.tablename + " ( \
57 record_id serial PRIMARY KEY , \
59 authority text NOT NULL, \
60 peer_authority text, \
64 date_created timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP, \
65 last_updated timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP);"
66 template = "CREATE INDEX %s_%s_idx ON %s (%s);"
67 indexes = [template % ( self.tablename, field, self.tablename, field) \
68 for field in ['hrn', 'type', 'authority', 'peer_authority', 'pointer']]
69 # IF EXISTS doenst exist in postgres < 8.2
71 self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
74 self.db.do('DROP TABLE' + self.tablename)
84 def remove(self, record):
85 params = {'record_id': record['record_id']}
86 template = "DELETE FROM %s " % self.tablename
87 sql = template + "WHERE record_id = %(record_id)s"
88 self.db.do(sql, params)
90 # if this is a site, remove all records where 'authority' == the
92 if record['type'] == 'authority':
93 params = {'authority': record['hrn']}
94 sql = template + "WHERE authority = %(authority)s"
95 self.db.do(sql, params)
98 def insert(self, record):
99 db_fields = self.db_fields(record)
100 keys = db_fields.keys()
101 values = [self.db.param(key, value) for (key, value) in db_fields.iteritems()]
102 query_str = "INSERT INTO " + self.tablename + \
103 "(" + ",".join(keys) + ") " + \
104 "VALUES(" + ",".join(values) + ")"
105 self.db.do(query_str, db_fields)
107 result = self.find({'hrn': record['hrn'], 'type': record['type'], 'peer_authority': record['peer_authority']})
110 elif isinstance(result, list):
111 record_id = result[0]['record_id']
113 record_id = result['record_id']
117 def update(self, record):
118 db_fields = self.db_fields(record)
119 keys = db_fields.keys()
120 values = [self.db.param(key, value) for (key, value) in db_fields.iteritems()]
121 columns = ["%s = %s" % (key, value) for (key, value) in zip(keys, values)]
122 query_str = "UPDATE %s SET %s WHERE record_id = %s" % \
123 (self.tablename, ", ".join(columns), record['record_id'])
124 self.db.do(query_str, db_fields)
127 def quote_string(self, value):
128 return str(self.db.quote(value))
130 def quote(self, value):
131 return self.db.quote(value)
133 def find(self, record_filter = None, columns=None):
137 columns = ",".join(columns)
138 sql = "SELECT %s FROM %s WHERE True " % (columns, self.tablename)
140 if isinstance(record_filter, (list, tuple, set)):
141 ints = filter(lambda x: isinstance(x, (int, long)), record_filter)
142 strs = filter(lambda x: isinstance(x, StringTypes), record_filter)
143 record_filter = Filter(SfaRecord.all_fields, {'record_id': ints, 'hrn': strs})
144 sql += "AND (%s) %s " % record_filter.sql("OR")
145 elif isinstance(record_filter, dict):
146 record_filter = Filter(SfaRecord.all_fields, record_filter)
147 sql += " AND (%s) %s" % record_filter.sql("AND")
148 elif isinstance(record_filter, StringTypes):
149 record_filter = Filter(SfaRecord.all_fields, {'hrn':[record_filter]})
150 sql += " AND (%s) %s" % record_filter.sql("AND")
151 elif isinstance(record_filter, int):
152 record_filter = Filter(SfaRecord.all_fields, {'record_id':[record_filter]})
153 sql += " AND (%s) %s" % record_filter.sql("AND")
155 results = self.db.selectall(sql)
156 if isinstance(results, dict):
160 def findObjects(self, record_filter = None, columns=None):
162 results = self.find(record_filter, columns)
164 for result in results:
165 if result['type'] in ['authority']:
166 result_rec_list.append(AuthorityRecord(dict=result))
167 elif result['type'] in ['node']:
168 result_rec_list.append(NodeRecord(dict=result))
169 elif result['type'] in ['slice']:
170 result_rec_list.append(SliceRecord(dict=result))
171 elif result['type'] in ['user']:
172 result_rec_list.append(UserRecord(dict=result))
174 result_rec_list.append(SfaRecord(dict=result))
175 return result_rec_list
180 self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
184 self.db.do('DROP TABLE ' + self.tablename)
189 def sfa_records_purge(self):