--- /dev/null
+#
+# implements support for SFA records stored in db tables
+#
+# TODO: Use existing PLC database methods? or keep this separate?
+
+from types import StringTypes
+
+from sfa.util.config import Config
+
+from sfa.storage.parameter import Parameter
+from sfa.storage.filter import Filter
+from sfa.storage.PostgreSQL import PostgreSQL
+from sfa.storage.record import SfaRecord, AuthorityRecord, NodeRecord, SliceRecord, UserRecord
+
+class SfaTable(list):
+
+ SFA_TABLE_PREFIX = "sfa"
+
+ def __init__(self, record_filter = None):
+
+ # pgsql doesn't like table names with "." in them, to replace it with "$"
+ self.tablename = SfaTable.SFA_TABLE_PREFIX
+ self.config = Config()
+ self.db = PostgreSQL(self.config)
+
+ if record_filter:
+ records = self.find(record_filter)
+ for record in records:
+ self.append(record)
+
+ def exists(self):
+ sql = "SELECT * from pg_tables"
+ tables = self.db.selectall(sql)
+ tables = filter(lambda row: row['tablename'].startswith(self.SFA_TABLE_PREFIX), tables)
+ if tables:
+ return True
+ return False
+
+ def db_fields(self, obj=None):
+
+ db_fields = self.db.fields(self.SFA_TABLE_PREFIX)
+ return dict( [ (key,value) for (key, value) in obj.iteritems() \
+ if key in db_fields and
+ self.is_writable(key, value, SfaRecord.fields)] )
+
+ @staticmethod
+ def is_writable (key,value,dict):
+ # if not mentioned, assume it's writable (e.g. deleted ...)
+ if key not in dict: return True
+ # if mentioned but not linked to a Parameter object, idem
+ if not isinstance(dict[key], Parameter): return True
+ # if not marked ro, it's writable
+ if not dict[key].ro: return True
+
+ return False
+
+
+ def create(self):
+
+ querystr = "CREATE TABLE " + self.tablename + " ( \
+ record_id serial PRIMARY KEY , \
+ hrn text NOT NULL, \
+ authority text NOT NULL, \
+ peer_authority text, \
+ gid text, \
+ type text NOT NULL, \
+ pointer integer, \
+ date_created timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP, \
+ last_updated timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP);"
+ template = "CREATE INDEX %s_%s_idx ON %s (%s);"
+ indexes = [template % ( self.tablename, field, self.tablename, field) \
+ for field in ['hrn', 'type', 'authority', 'peer_authority', 'pointer']]
+ # IF EXISTS doenst exist in postgres < 8.2
+ try:
+ self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
+ except:
+ try:
+ self.db.do('DROP TABLE' + self.tablename)
+ except:
+ pass
+
+ self.db.do(querystr)
+ for index in indexes:
+ self.db.do(index)
+
+ self.db.commit()
+
+ def remove(self, record):
+ params = {'record_id': record['record_id']}
+ template = "DELETE FROM %s " % self.tablename
+ sql = template + "WHERE record_id = %(record_id)s"
+ self.db.do(sql, params)
+
+ # if this is a site, remove all records where 'authority' == the
+ # site's hrn
+ if record['type'] == 'authority':
+ params = {'authority': record['hrn']}
+ sql = template + "WHERE authority = %(authority)s"
+ self.db.do(sql, params)
+ self.db.commit()
+
+ def insert(self, record):
+ db_fields = self.db_fields(record)
+ keys = db_fields.keys()
+ values = [self.db.param(key, value) for (key, value) in db_fields.iteritems()]
+ query_str = "INSERT INTO " + self.tablename + \
+ "(" + ",".join(keys) + ") " + \
+ "VALUES(" + ",".join(values) + ")"
+ self.db.do(query_str, db_fields)
+ self.db.commit()
+ result = self.find({'hrn': record['hrn'], 'type': record['type'], 'peer_authority': record['peer_authority']})
+ if not result:
+ record_id = None
+ elif isinstance(result, list):
+ record_id = result[0]['record_id']
+ else:
+ record_id = result['record_id']
+
+ return record_id
+
+ def update(self, record):
+ db_fields = self.db_fields(record)
+ keys = db_fields.keys()
+ values = [self.db.param(key, value) for (key, value) in db_fields.iteritems()]
+ columns = ["%s = %s" % (key, value) for (key, value) in zip(keys, values)]
+ query_str = "UPDATE %s SET %s WHERE record_id = %s" % \
+ (self.tablename, ", ".join(columns), record['record_id'])
+ self.db.do(query_str, db_fields)
+ self.db.commit()
+
+ def quote_string(self, value):
+ return str(self.db.quote(value))
+
+ def quote(self, value):
+ return self.db.quote(value)
+
+ def find(self, record_filter = None, columns=None):
+ if not columns:
+ columns = "*"
+ else:
+ columns = ",".join(columns)
+ sql = "SELECT %s FROM %s WHERE True " % (columns, self.tablename)
+
+ if isinstance(record_filter, (list, tuple, set)):
+ ints = filter(lambda x: isinstance(x, (int, long)), record_filter)
+ strs = filter(lambda x: isinstance(x, StringTypes), record_filter)
+ record_filter = Filter(SfaRecord.all_fields, {'record_id': ints, 'hrn': strs})
+ sql += "AND (%s) %s " % record_filter.sql("OR")
+ elif isinstance(record_filter, dict):
+ record_filter = Filter(SfaRecord.all_fields, record_filter)
+ sql += " AND (%s) %s" % record_filter.sql("AND")
+ elif isinstance(record_filter, StringTypes):
+ record_filter = Filter(SfaRecord.all_fields, {'hrn':[record_filter]})
+ sql += " AND (%s) %s" % record_filter.sql("AND")
+ elif isinstance(record_filter, int):
+ record_filter = Filter(SfaRecord.all_fields, {'record_id':[record_filter]})
+ sql += " AND (%s) %s" % record_filter.sql("AND")
+
+ results = self.db.selectall(sql)
+ if isinstance(results, dict):
+ results = [results]
+ return results
+
+ def findObjects(self, record_filter = None, columns=None):
+
+ results = self.find(record_filter, columns)
+ result_rec_list = []
+ for result in results:
+ if result['type'] in ['authority']:
+ result_rec_list.append(AuthorityRecord(dict=result))
+ elif result['type'] in ['node']:
+ result_rec_list.append(NodeRecord(dict=result))
+ elif result['type'] in ['slice']:
+ result_rec_list.append(SliceRecord(dict=result))
+ elif result['type'] in ['user']:
+ result_rec_list.append(UserRecord(dict=result))
+ else:
+ result_rec_list.append(SfaRecord(dict=result))
+ return result_rec_list
+
+
+ def drop(self):
+ try:
+ self.db.do('DROP TABLE IF EXISTS ' + self.tablename)
+ self.db.commit()
+ except:
+ try:
+ self.db.do('DROP TABLE ' + self.tablename)
+ self.db.commit()
+ except:
+ pass
+
+ def sfa_records_purge(self):
+ self.drop()
git://git.onelab.eu / sfa.git / blobdiff