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 GENI_TABLE_PREFIX = "geni$"
  19
  20 class GeniTable:
  21     def __init__(self, create=False, hrn="unspecified.default.registry", cninfo=None):
  22         global GENI_TABLE_PREFIX
  23
  24         self.hrn = hrn
  25
  26         # pgsql doesn't like table names with "." in them, to replace it with "$"
  27         self.tablename = 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                 name text, \
  49                 gid text, \
  50                 type text, \
  51                 pointer integer);"
  52         template = "CREATE INDEX %s_%s_idx ON %s (%s);"
  53         indexes = [template % ( self.tablename, field, self.tablename, field) \
  54                    for field in ['name', 'type' ]]
  55         # IF EXISTS doenst exist in postgres < 8.2
  56         try:
  57             self.cnx.query('DROP TABLE IF EXISTS ' + self.tablename)
  58         except ProgrammingError:
  59             try:
  60                 self.cnx.query('DROP TABLE ' + self.tablename)
  61             except ProgrammingError:
  62                 pass
  63
  64         self.cnx.query(querystr)
  65         for index in indexes:
  66             self.cnx.query(index)
  67
  68     def remove(self, record):
  69         query_str = "DELETE FROM " + self.tablename + " WHERE key = '" + record.get_key() + "'"
  70         self.cnx.query(query_str)
  71
  72     def insert(self, record):
  73         fieldnames = ["key"] + record.get_field_names()
  74         fieldvals = record.get_field_value_strings(fieldnames)
  75         query_str = "INSERT INTO " + self.tablename + \
  76                        "(" + ",".join(fieldnames) + ") " + \
  77                        "VALUES(" + ",".join(fieldvals) + ")"
  78         #print query_str
  79         self.cnx.query(query_str)
  80
  81     def update(self, record):
  82         names = record.get_field_names()
  83         pairs = []
  84         for name in names:
  85            val = record.get_field_value_string(name)
  86            pairs.append(name + " = " + val)
  87         update = ", ".join(pairs)
  88
  89         query_str = "UPDATE " + self.tablename+ " SET " + update + " WHERE key = '" + record.get_key() + "'"
  90         #print query_str
  91         self.cnx.query(query_str)
  92
  93     def find_dict(self, type, value, searchfield):
  94         query_str = "SELECT * FROM " + self.tablename + " WHERE " + searchfield + " = '" + str(value) + "'"
  95         dict_list = self.cnx.query(query_str).dictresult()
  96         result_dict_list = []
  97         for dict in dict_list:
  98            if (type=="*") or (dict['type'] == type):
  99                dict['hrn'] = dict['name']
 100                result_dict_list.append(dict)
 101         return result_dict_list
 102
 103     def find(self, type, value, searchfield):
 104         result_dict_list = self.find_dict(type, value, searchfield)
 105         result_rec_list = []
 106         for result in result_dict_list:
 107             if result['type'] in ['authority']:
 108                 result_rec_list.append(AuthorityRecord(dict=result))
 109             elif result['type'] in ['node']:
 110                 result_rec_list.append(NodeRecord(dict=result))
 111             elif result['type'] in ['slice']:
 112                 result_rec_list.append(SliceRecord(dict=result))
 113             elif result['type'] in ['user']:
 114                 result_rec_list.append(UserRecord(dict=result))
 115             else:
 116                 result_rec_list.append(GeniRecord(dict=result))
 117         return result_rec_list
 118
 119     def resolve_dict(self, type, hrn):
 120         return self.find_dict(type, hrn, "name")
 121
 122     def resolve(self, type, hrn):
 123         return self.find(type, hrn, "name")
 124
 125     def list_dict(self):
 126         query_str = "SELECT * FROM " + self.tablename
 127         result_dict_list = self.cnx.query(query_str).dictresult()
 128         return result_dict_list
 129
 130     def list(self):
 131         result_dict_list = self.list_dict()
 132         result_rec_list = []
 133         for dict in result_dict_list:
 134             result_rec_list.append(GeniRecord(dict=dict).as_dict())
 135         return result_rec_list
 136
 137 def set_geni_table_prefix(x):
 138     global GENI_TABLE_PREFIX
 139
 140     GENI_TABLE_PREFIX = x
 141
 142 def geni_records_purge(cninfo):
 143     global GENI_TABLE_PREFIX
 144
 145     cnx = DB(cninfo['dbname'], cninfo['address'], port=cninfo['port'], user=cninfo['user'], passwd=cninfo['password'])
 146     tableList = cnx.get_tables()
 147     for table in tableList:
 148         if table.startswith(GENI_TABLE_PREFIX) or \
 149            table.startswith('public.' + GENI_TABLE_PREFIX) or \
 150            table.startswith('public."' + GENI_TABLE_PREFIX):
 151                report.trace("dropping table " + table)
 152                cnx.query("DROP TABLE " + table)