sfa/util/genitable.py

   1 # genitable.py
   2 #
   3 # implements support for geni records stored in db tables
   4 #
   5 # TODO: Use existing PLC database methods? or keep this separate?
   6
   7 ### $Id$
   8 ### $URL$
   9
  10 import report
  11
  12 from pg import DB, ProgrammingError
  13
  14 from sfa.trust.gid import *
  15 from sfa.util.record import *
  16 from sfa.util.debug import *
  17
  18 class GeniTable:
  19
  20     GENI_TABLE_PREFIX = "sfa$"
  21
  22     def __init__(self, create=False, hrn="unspecified.default.registry", cninfo=None):
  23
  24         self.hrn = hrn
  25
  26         # pgsql doesn't like table names with "." in them, to replace it with "$"
  27         self.tablename = GeniTable.GENI_TABLE_PREFIX + self.hrn.replace(".", "$")
  28
  29         # establish a connection to the pgsql server
  30         self.cnx = DB(cninfo['dbname'], cninfo['address'], port=cninfo['port'], user=cninfo['user'], passwd=cninfo['password'])
  31
  32         # if asked to create the table, then create it
  33         if create:
  34             self.create()
  35
  36     def exists(self):
  37         tableList = self.cnx.get_tables()
  38         if 'public.' + self.tablename in tableList:
  39             return True
  40         if 'public."' + self.tablename + '"' in tableList:
  41             return True
  42         return False
  43
  44     def create(self):
  45
  46         querystr = "CREATE TABLE " + self.tablename + " ( \
  47                 key text, \
  48                 hrn text, \
  49                 gid text, \
  50                 type text, \
  51                 pointer integer, \
  52                 date_created timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP, \
  53                 last_updated timestamp without time zone NOT NULL DEFAULT CURRENT_TIMESTAMP);"
  54         template = "CREATE INDEX %s_%s_idx ON %s (%s);"
  55         indexes = [template % ( self.tablename, field, self.tablename, field) \
  56                    for field in ['key', 'hrn', 'type','pointer']]
  57         # IF EXISTS doenst exist in postgres < 8.2
  58         try:
  59             self.cnx.query('DROP TABLE IF EXISTS ' + self.tablename)
  60         except ProgrammingError:
  61             try:
  62                 self.cnx.query('DROP TABLE ' + self.tablename)
  63             except ProgrammingError:
  64                 pass
  65
  66         self.cnx.query(querystr)
  67         for index in indexes:
  68             self.cnx.query(index)
  69
  70     def remove(self, record):
  71         query_str = "DELETE FROM " + self.tablename + " WHERE key = '" + record.get_key() + "'"
  72         self.cnx.query(query_str)
  73
  74     def insert(self, record):
  75         fieldnames = ["key"] + record.get_field_names()
  76         fieldvals = record.get_field_value_strings(fieldnames)
  77         query_str = "INSERT INTO " + self.tablename + \
  78                        "(" + ",".join(fieldnames) + ") " + \
  79                        "VALUES(" + ",".join(fieldvals) + ")"
  80         #print query_str
  81         self.cnx.query(query_str)
  82
  83     def update(self, record):
  84         names = record.get_field_names()
  85         pairs = []
  86         for name in names:
  87            val = record.get_field_value_string(name)
  88            pairs.append(name + " = " + val)
  89         update = ", ".join(pairs)
  90
  91         query_str = "UPDATE " + self.tablename+ " SET " + update + " WHERE key = '" + record.get_key() + "'"
  92         #print query_str
  93         self.cnx.query(query_str)
  94
  95     def find_dict(self, type, value, searchfield):
  96         query_str = "SELECT * FROM " + self.tablename + " WHERE " + searchfield + " = '" + str(value) + "'"
  97         dict_list = self.cnx.query(query_str).dictresult()
  98         result_dict_list = []
  99         for dict in dict_list:
 100            if (type=="*") or (dict['type'] == type):
 101                result_dict_list.append(dict)
 102         return result_dict_list
 103
 104     def find(self, type, value, searchfield):
 105         result_dict_list = self.find_dict(type, value, searchfield)
 106         result_rec_list = []
 107         for result in result_dict_list:
 108             if result['type'] in ['authority']:
 109                 result_rec_list.append(AuthorityRecord(dict=result))
 110             elif result['type'] in ['node']:
 111                 result_rec_list.append(NodeRecord(dict=result))
 112             elif result['type'] in ['slice']:
 113                 result_rec_list.append(SliceRecord(dict=result))
 114             elif result['type'] in ['user']:
 115                 result_rec_list.append(UserRecord(dict=result))
 116             else:
 117                 result_rec_list.append(GeniRecord(dict=result))
 118         return result_rec_list
 119
 120     def resolve_dict(self, type, hrn):
 121         return self.find_dict(type, hrn, "hrn")
 122
 123     def resolve(self, type, hrn):
 124         return self.find(type, hrn, "hrn")
 125
 126     def list_dict(self):
 127         query_str = "SELECT * FROM " + self.tablename
 128         result_dict_list = self.cnx.query(query_str).dictresult()
 129         return result_dict_list
 130
 131     def list(self):
 132         result_dict_list = self.list_dict()
 133         result_rec_list = []
 134         for dict in result_dict_list:
 135             result_rec_list.append(GeniRecord(dict=dict).as_dict())
 136         return result_rec_list
 137
 138     @staticmethod
 139     def geni_records_purge(cninfo):
 140
 141         cnx = DB(cninfo['dbname'], cninfo['address'],
 142                  port=cninfo['port'], user=cninfo['user'], passwd=cninfo['password'])
 143         tableList = cnx.get_tables()
 144         for table in tableList:
 145             if table.startswith(GeniTable.GENI_TABLE_PREFIX) or \
 146                     table.startswith('public.' + GeniTable.GENI_TABLE_PREFIX) or \
 147                     table.startswith('public."' + GeniTable.GENI_TABLE_PREFIX):
 148                 report.trace("dropping table " + table)
 149                 cnx.query("DROP TABLE " + table)