4 # implements support for SFA records stored in db tables
6 # TODO: Use existing PLC database methods? or keep this separate?
10 from sfa.util.PostgreSQL import *
11 from sfa.trust.gid import *
12 from sfa.util.record import *
13 from sfa.util.config import *
14 from sfa.util.filter import *
18 SFA_TABLE_PREFIX = "sfa"
20 def __init__(self, record_filter = None):
22 # pgsql doesn't like table names with "." in them, to replace it with "$"
23 self.tablename = SfaTable.SFA_TABLE_PREFIX
24 self.config = Config()
25 self.db = PostgreSQL(self.config)
28 records = self.find(record_filter)
29 for record in records:
33 sql = "SELECT * from pg_tables"
34 tables = self.db.selectall(sql)
35 tables = filter(lambda row: row['tablename'].startswith(self.SFA_TABLE_PREFIX), tables)
39 def db_fields(self, obj=None):
41 db_fields = self.db.fields(self.SFA_TABLE_PREFIX)
42 return dict( [ (key,value) for (key, value) in obj.items() \
43 if key in db_fields and
44 self.is_writable(key, value, SfaRecord.fields)] )
47 def is_writable (key,value,dict):
48 # if not mentioned, assume it's writable (e.g. deleted ...)
49 if key not in dict: return True
50 # if mentioned but not linked to a Parameter object, idem
51 if not isinstance(dict[key], Parameter): return True
52 # if not marked ro, it's writable
53 if not dict[key].ro: return True
60 querystr = "CREATE TABLE " + self.tablename + " ( \
61 record_id serial PRIMARY KEY , \
63 authority text NOT NULL, \
64 peer_authority text, \
68 date_created timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP, \
69 last_updated timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP);"
70 template = "CREATE INDEX %s_%s_idx ON %s (%s);"
71 indexes = [template % ( self.tablename, field, self.tablename, field) \
72 for field in ['hrn', 'type', 'authority', 'peer_authority', 'pointer']]
73 # IF EXISTS doenst exist in postgres < 8.2
75 self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
78 self.db.do('DROP TABLE' + self.tablename)
88 def remove(self, record):
89 params = {'record_id': record['record_id']}
90 template = "DELETE FROM %s " % self.tablename
91 sql = template + "WHERE record_id = %(record_id)s"
92 self.db.do(sql, params)
94 # if this is a site, remove all records where 'authority' == the
96 if record['type'] == 'authority':
97 params = {'authority': record['hrn']}
98 sql = template + "WHERE authority = %(authority)s"
99 self.db.do(sql, params)
102 def insert(self, record):
103 db_fields = self.db_fields(record)
104 keys = db_fields.keys()
105 values = [self.db.param(key, value) for (key, value) in db_fields.items()]
106 query_str = "INSERT INTO " + self.tablename + \
107 "(" + ",".join(keys) + ") " + \
108 "VALUES(" + ",".join(values) + ")"
109 self.db.do(query_str, db_fields)
111 result = self.find({'hrn': record['hrn'], 'type': record['type'], 'peer_authority': record['peer_authority']})
114 elif isinstance(result, list):
115 record_id = result[0]['record_id']
117 record_id = result['record_id']
121 def update(self, record):
122 db_fields = self.db_fields(record)
123 keys = db_fields.keys()
124 values = [self.db.param(key, value) for (key, value) in db_fields.items()]
125 columns = ["%s = %s" % (key, value) for (key, value) in zip(keys, values)]
126 query_str = "UPDATE %s SET %s WHERE record_id = %s" % \
127 (self.tablename, ", ".join(columns), record['record_id'])
128 self.db.do(query_str, db_fields)
131 def quote_string(self, value):
132 return str(self.db.quote(value))
134 def quote(self, value):
135 return self.db.quote(value)
137 def find(self, record_filter = None, columns=None):
141 columns = ",".join(columns)
142 sql = "SELECT %s FROM %s WHERE True " % (columns, self.tablename)
144 if isinstance(record_filter, (list, tuple, set)):
145 ints = filter(lambda x: isinstance(x, (int, long)), record_filter)
146 strs = filter(lambda x: isinstance(x, StringTypes), record_filter)
147 record_filter = Filter(SfaRecord.all_fields, {'record_id': ints, 'hrn': strs})
148 sql += "AND (%s) %s " % record_filter.sql("OR")
149 elif isinstance(record_filter, dict):
150 record_filter = Filter(SfaRecord.all_fields, record_filter)
151 sql += " AND (%s) %s" % record_filter.sql("AND")
152 elif isinstance(record_filter, StringTypes):
153 record_filter = Filter(SfaRecord.all_fields, {'hrn':[record_filter]})
154 sql += " AND (%s) %s" % record_filter.sql("AND")
155 elif isinstance(record_filter, int):
156 record_filter = Filter(SfaRecord.all_fields, {'record_id':[record_filter]})
157 sql += " AND (%s) %s" % record_filter.sql("AND")
159 results = self.db.selectall(sql)
160 if isinstance(results, dict):
164 def findObjects(self, record_filter = None, columns=None):
166 results = self.find(record_filter, columns)
168 for result in results:
169 if result['type'] in ['authority']:
170 result_rec_list.append(AuthorityRecord(dict=result))
171 elif result['type'] in ['node']:
172 result_rec_list.append(NodeRecord(dict=result))
173 elif result['type'] in ['slice']:
174 result_rec_list.append(SliceRecord(dict=result))
175 elif result['type'] in ['user']:
176 result_rec_list.append(UserRecord(dict=result))
178 result_rec_list.append(SfaRecord(dict=result))
179 return result_rec_list
184 self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
188 self.db.do('DROP TABLE ' + self.tablename)
193 def sfa_records_purge(self):