4 # implements support for SFA records stored in db tables
6 # TODO: Use existing PLC database methods? or keep this separate?
11 from sfa.util.PostgreSQL import *
12 from sfa.trust.gid import *
13 from sfa.util.record import *
14 from sfa.util.debug import *
15 from sfa.util.config import *
16 from sfa.util.filter import *
20 SFA_TABLE_PREFIX = "sfa"
22 def __init__(self, record_filter = None):
24 # pgsql doesn't like table names with "." in them, to replace it with "$"
25 self.tablename = SfaTable.SFA_TABLE_PREFIX
26 self.config = Config()
27 self.db = PostgreSQL(self.config)
30 records = self.find(record_filter)
31 for record in records:
35 sql = "SELECT * from pg_tables"
36 tables = self.db.selectall(sql)
37 tables = filter(lambda row: row['tablename'].startswith(self.SFA_TABLE_PREFIX), tables)
41 def db_fields(self, obj=None):
43 db_fields = self.db.fields(self.SFA_TABLE_PREFIX)
44 return dict( [ (key,value) for (key, value) in obj.items() \
45 if key in db_fields and
46 self.is_writable(key, value, SfaRecord.fields)] )
49 def is_writable (key,value,dict):
50 # if not mentioned, assume it's writable (e.g. deleted ...)
51 if key not in dict: return True
52 # if mentioned but not linked to a Parameter object, idem
53 if not isinstance(dict[key], Parameter): return True
54 # if not marked ro, it's writable
55 if not dict[key].ro: return True
62 querystr = "CREATE TABLE " + self.tablename + " ( \
63 record_id serial PRIMARY KEY , \
65 authority text NOT NULL, \
66 peer_authority text, \
70 date_created timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP, \
71 last_updated timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP);"
72 template = "CREATE INDEX %s_%s_idx ON %s (%s);"
73 indexes = [template % ( self.tablename, field, self.tablename, field) \
74 for field in ['hrn', 'type', 'authority', 'peer_authority', 'pointer']]
75 # IF EXISTS doenst exist in postgres < 8.2
77 self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
80 self.db.do('DROP TABLE' + self.tablename)
90 def remove(self, record):
91 params = {'record_id': record['record_id']}
92 template = "DELETE FROM %s " % self.tablename
93 sql = template + "WHERE record_id = %(record_id)s"
94 self.db.do(sql, params)
96 # if this is a site, remove all records where 'authority' == the
98 if record['type'] == 'authority':
99 params = {'authority': record['hrn']}
100 sql = template + "WHERE authority = %(authority)s"
101 self.db.do(sql, params)
104 def insert(self, record):
105 db_fields = self.db_fields(record)
106 keys = db_fields.keys()
107 values = [self.db.param(key, value) for (key, value) in db_fields.items()]
108 query_str = "INSERT INTO " + self.tablename + \
109 "(" + ",".join(keys) + ") " + \
110 "VALUES(" + ",".join(values) + ")"
111 self.db.do(query_str, db_fields)
113 result = self.find({'hrn': record['hrn'], 'type': record['type'], 'peer_authority': record['peer_authority']})
116 elif isinstance(result, list):
117 record_id = result[0]['record_id']
119 record_id = result['record_id']
123 def update(self, record):
124 db_fields = self.db_fields(record)
125 keys = db_fields.keys()
126 values = [self.db.param(key, value) for (key, value) in db_fields.items()]
127 columns = ["%s = %s" % (key, value) for (key, value) in zip(keys, values)]
128 query_str = "UPDATE %s SET %s WHERE record_id = %s" % \
129 (self.tablename, ", ".join(columns), record['record_id'])
130 self.db.do(query_str, db_fields)
133 def quote_string(self, value):
134 return str(self.db.quote(value))
136 def quote(self, value):
137 return self.db.quote(value)
139 def find(self, record_filter = None, columns=None):
143 columns = ",".join(columns)
144 sql = "SELECT %s FROM %s WHERE True " % (columns, self.tablename)
146 if isinstance(record_filter, (list, tuple, set)):
147 ints = filter(lambda x: isinstance(x, (int, long)), record_filter)
148 strs = filter(lambda x: isinstance(x, StringTypes), record_filter)
149 record_filter = Filter(SfaRecord.all_fields, {'record_id': ints, 'hrn': strs})
150 sql += "AND (%s) %s " % record_filter.sql("OR")
151 elif isinstance(record_filter, dict):
152 record_filter = Filter(SfaRecord.all_fields, record_filter)
153 sql += " AND (%s) %s" % record_filter.sql("AND")
154 elif isinstance(record_filter, StringTypes):
155 record_filter = Filter(SfaRecord.all_fields, {'hrn':[record_filter]})
156 sql += " AND (%s) %s" % record_filter.sql("AND")
157 elif isinstance(record_filter, int):
158 record_filter = Filter(SfaRecord.all_fields, {'record_id':[record_filter]})
159 sql += " AND (%s) %s" % record_filter.sql("AND")
161 results = self.db.selectall(sql)
162 if isinstance(results, dict):
166 def findObjects(self, record_filter = None, columns=None):
168 results = self.find(record_filter, columns)
170 for result in results:
171 if result['type'] in ['authority']:
172 result_rec_list.append(AuthorityRecord(dict=result))
173 elif result['type'] in ['node']:
174 result_rec_list.append(NodeRecord(dict=result))
175 elif result['type'] in ['slice']:
176 result_rec_list.append(SliceRecord(dict=result))
177 elif result['type'] in ['user']:
178 result_rec_list.append(UserRecord(dict=result))
180 result_rec_list.append(SfaRecord(dict=result))
181 return result_rec_list
186 self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
190 self.db.do('DROP TABLE ' + self.tablename)
195 def sfa_records_purge(self):