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         dont_insert = ['date_created', 'last_updated']
  76         fields = [field for field in  record.fields.keys() if field not in dont_insert]
  77         fieldnames = ["key", "pointer"] + fields
  78         fieldvals = record.get_field_value_strings(fieldnames)
  79         query_str = "INSERT INTO " + self.tablename + \
  80                        "(" + ",".join(fieldnames) + ") " + \
  81                        "VALUES(" + ",".join(fieldvals) + ")"
  82         #print query_str
  83         self.cnx.query(query_str)
  84
  85     def update(self, record):
  86         dont_update = ['date_created', 'last_updated']
  87         fields = [field for field in  record.fields.keys() if field not in dont_update]
  88         fieldvals = record.get_field_value_strings(fields)
  89         pairs = []
  90         for field in fields:
  91             val = record.get_field_value_string(field)
  92             pairs.append(field + " = " + val)
  93         update = ", ".join(pairs)
  94
  95         query_str = "UPDATE " + self.tablename+ " SET " + update + " WHERE key = '" + record.get_key() + "'"
  96         #print query_str
  97         self.cnx.query(query_str)
  98
  99     def find_dict(self, type, value, searchfield):
 100         query_str = "SELECT * FROM " + self.tablename + " WHERE " + searchfield + " = '" + str(value) + "'"
 101         dict_list = self.cnx.query(query_str).dictresult()
 102         result_dict_list = []
 103         for dict in dict_list:
 104            if (type=="*") or (dict['type'] == type):
 105                result_dict_list.append(dict)
 106         return result_dict_list
 107
 108     def find(self, type, value, searchfield):
 109         result_dict_list = self.find_dict(type, value, searchfield)
 110         result_rec_list = []
 111         for result in result_dict_list:
 112             if result['type'] in ['authority']:
 113                 result_rec_list.append(AuthorityRecord(dict=result))
 114             elif result['type'] in ['node']:
 115                 result_rec_list.append(NodeRecord(dict=result))
 116             elif result['type'] in ['slice']:
 117                 result_rec_list.append(SliceRecord(dict=result))
 118             elif result['type'] in ['user']:
 119                 result_rec_list.append(UserRecord(dict=result))
 120             else:
 121                 result_rec_list.append(GeniRecord(dict=result))
 122         return result_rec_list
 123
 124     def resolve_dict(self, type, hrn):
 125         return self.find_dict(type, hrn, "hrn")
 126
 127     def resolve(self, type, hrn):
 128         return self.find(type, hrn, "hrn")
 129
 130     def list_dict(self):
 131         query_str = "SELECT * FROM " + self.tablename
 132         result_dict_list = self.cnx.query(query_str).dictresult()
 133         return result_dict_list
 134
 135     def list(self):
 136         result_dict_list = self.list_dict()
 137         result_rec_list = []
 138         for dict in result_dict_list:
 139             result_rec_list.append(GeniRecord(dict=dict).as_dict())
 140         return result_rec_list
 141
 142     def drop(self):
 143         try:
 144             self.cnx.query('DROP TABLE IF EXISTS ' + self.tablename)
 145         except ProgrammingError:
 146             try:
 147                 self.cnx.query('DROP TABLE ' + self.tablename)
 148             except ProgrammingError:
 149                 pass
 150
 151     @staticmethod
 152     def geni_records_purge(cninfo):
 153
 154         cnx = DB(cninfo['dbname'], cninfo['address'],
 155                  port=cninfo['port'], user=cninfo['user'], passwd=cninfo['password'])
 156         tableList = cnx.get_tables()
 157         for table in tableList:
 158             if table.startswith(GeniTable.GENI_TABLE_PREFIX) or \
 159                     table.startswith('public.' + GeniTable.GENI_TABLE_PREFIX) or \
 160                     table.startswith('public."' + GeniTable.GENI_TABLE_PREFIX):
 161                 report.trace("dropping table " + table)
 162                 cnx.query("DROP TABLE " + table)