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
9 from sfa.util.parameter import Parameter
10 from sfa.util.filter import Filter
11 from sfa.util.PostgreSQL import PostgreSQL
12 from sfa.util.record import SfaRecord, AuthorityRecord, NodeRecord, SliceRecord, UserRecord
16 SFA_TABLE_PREFIX = "sfa"
18 def __init__(self, record_filter = None):
20 # pgsql doesn't like table names with "." in them, to replace it with "$"
21 self.tablename = SfaTable.SFA_TABLE_PREFIX
22 self.config = Config()
23 self.db = PostgreSQL(self.config)
26 records = self.find(record_filter)
27 for record in records:
31 sql = "SELECT * from pg_tables"
32 tables = self.db.selectall(sql)
33 tables = filter(lambda row: row['tablename'].startswith(self.SFA_TABLE_PREFIX), tables)
37 def db_fields(self, obj=None):
39 db_fields = self.db.fields(self.SFA_TABLE_PREFIX)
40 return dict( [ (key,value) for (key, value) in obj.iteritems() \
41 if key in db_fields and
42 self.is_writable(key, value, SfaRecord.fields)] )
45 def is_writable (key,value,dict):
46 # if not mentioned, assume it's writable (e.g. deleted ...)
47 if key not in dict: return True
48 # if mentioned but not linked to a Parameter object, idem
49 if not isinstance(dict[key], Parameter): return True
50 # if not marked ro, it's writable
51 if not dict[key].ro: return True
58 querystr = "CREATE TABLE " + self.tablename + " ( \
59 record_id serial PRIMARY KEY , \
61 authority text NOT NULL, \
62 peer_authority text, \
66 date_created timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP, \
67 last_updated timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP);"
68 template = "CREATE INDEX %s_%s_idx ON %s (%s);"
69 indexes = [template % ( self.tablename, field, self.tablename, field) \
70 for field in ['hrn', 'type', 'authority', 'peer_authority', 'pointer']]
71 # IF EXISTS doenst exist in postgres < 8.2
73 self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
76 self.db.do('DROP TABLE' + self.tablename)
86 def remove(self, record):
87 params = {'record_id': record['record_id']}
88 template = "DELETE FROM %s " % self.tablename
89 sql = template + "WHERE record_id = %(record_id)s"
90 self.db.do(sql, params)
92 # if this is a site, remove all records where 'authority' == the
94 if record['type'] == 'authority':
95 params = {'authority': record['hrn']}
96 sql = template + "WHERE authority = %(authority)s"
97 self.db.do(sql, params)
100 def insert(self, record):
101 db_fields = self.db_fields(record)
102 keys = db_fields.keys()
103 values = [self.db.param(key, value) for (key, value) in db_fields.iteritems()]
104 query_str = "INSERT INTO " + self.tablename + \
105 "(" + ",".join(keys) + ") " + \
106 "VALUES(" + ",".join(values) + ")"
107 self.db.do(query_str, db_fields)
109 result = self.find({'hrn': record['hrn'], 'type': record['type'], 'peer_authority': record['peer_authority']})
112 elif isinstance(result, list):
113 record_id = result[0]['record_id']
115 record_id = result['record_id']
119 def update(self, record):
120 db_fields = self.db_fields(record)
121 keys = db_fields.keys()
122 values = [self.db.param(key, value) for (key, value) in db_fields.iteritems()]
123 columns = ["%s = %s" % (key, value) for (key, value) in zip(keys, values)]
124 query_str = "UPDATE %s SET %s WHERE record_id = %s" % \
125 (self.tablename, ", ".join(columns), record['record_id'])
126 self.db.do(query_str, db_fields)
129 def quote_string(self, value):
130 return str(self.db.quote(value))
132 def quote(self, value):
133 return self.db.quote(value)
135 def find(self, record_filter = None, columns=None):
139 columns = ",".join(columns)
140 sql = "SELECT %s FROM %s WHERE True " % (columns, self.tablename)
142 if isinstance(record_filter, (list, tuple, set)):
143 ints = filter(lambda x: isinstance(x, (int, long)), record_filter)
144 strs = filter(lambda x: isinstance(x, StringTypes), record_filter)
145 record_filter = Filter(SfaRecord.all_fields, {'record_id': ints, 'hrn': strs})
146 sql += "AND (%s) %s " % record_filter.sql("OR")
147 elif isinstance(record_filter, dict):
148 record_filter = Filter(SfaRecord.all_fields, record_filter)
149 sql += " AND (%s) %s" % record_filter.sql("AND")
150 elif isinstance(record_filter, StringTypes):
151 record_filter = Filter(SfaRecord.all_fields, {'hrn':[record_filter]})
152 sql += " AND (%s) %s" % record_filter.sql("AND")
153 elif isinstance(record_filter, int):
154 record_filter = Filter(SfaRecord.all_fields, {'record_id':[record_filter]})
155 sql += " AND (%s) %s" % record_filter.sql("AND")
157 results = self.db.selectall(sql)
158 if isinstance(results, dict):
162 def findObjects(self, record_filter = None, columns=None):
164 results = self.find(record_filter, columns)
166 for result in results:
167 if result['type'] in ['authority']:
168 result_rec_list.append(AuthorityRecord(dict=result))
169 elif result['type'] in ['node']:
170 result_rec_list.append(NodeRecord(dict=result))
171 elif result['type'] in ['slice']:
172 result_rec_list.append(SliceRecord(dict=result))
173 elif result['type'] in ['user']:
174 result_rec_list.append(UserRecord(dict=result))
176 result_rec_list.append(SfaRecord(dict=result))
177 return result_rec_list
182 self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
186 self.db.do('DROP TABLE ' + self.tablename)
191 def sfa_records_purge(self):