src/NamingService/SALOME_NamingServicePy.py

   1 #! /usr/bin/env python
   2 #
   3 #  SALOME NamingService : wrapping NamingService services
   4 #
   5 #  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
   6 #  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
   7 #
   8 #  This library is free software; you can redistribute it and/or
   9 #  modify it under the terms of the GNU Lesser General Public
  10 #  License as published by the Free Software Foundation; either
  11 #  version 2.1 of the License.
  12 #
  13 #  This library is distributed in the hope that it will be useful,
  14 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 #  Lesser General Public License for more details.
  17 #
  18 #  You should have received a copy of the GNU Lesser General Public
  19 #  License along with this library; if not, write to the Free Software
  20 #  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21 #
  22 #  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
  23 #
  24 #
  25 #
  26 #  File   : SALOME_NamingServicePy.py
  27 #  Author : Estelle Deville, CEA
  28 #  Module : SALOME
  29 #  $Header$
  30
  31 import sys
  32 import time
  33 from omniORB import CORBA
  34 import CosNaming
  35 from string import *
  36
  37 from SALOME_utilities import *
  38 #=============================================================================
  39
  40 class SALOME_NamingServicePy_i:
  41     _orb = None
  42     _root_context=None
  43     _current_context=None
  44     _obj=None
  45
  46     #-------------------------------------------------------------------------
  47
  48     def __init__(self, orb):
  49         #MESSAGE ( "SALOME_NamingServicePy_i::__init__" )
  50         self._orb = orb
  51         # initialize root context and current context
  52         ok = 0
  53         steps = 40
  54         while steps > 0 and ok == 0:
  55           try:
  56             obj =self._orb.resolve_initial_references("NameService")
  57             self._root_context =obj._narrow(CosNaming.NamingContext)
  58             self._current_context = self._root_context
  59
  60
  61             if self._root_context is None :
  62               #MESSAGE ( "Name Service Reference is invalid" )
  63               #sys.exit(1)
  64               MESSAGE(" Name service not found")
  65             else:
  66               ok = 1
  67           except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
  68             MESSAGE(" Name service not found")
  69           time.sleep(0.25)
  70           steps = steps - 1
  71         if steps == 0:
  72           MESSAGE ( "Name Service Reference is invalid" )
  73           sys.exit(1)
  74     #-------------------------------------------------------------------------
  75     def Register(self,ObjRef, Path):
  76         MESSAGE ( "SALOME_NamingServicePy_i::Register" )
  77         _not_exist = 0
  78         path_list = list(Path)
  79         if path_list[0]=='/':
  80             self._current_context = self._root_context
  81             #delete first '/' before split
  82             Path=Path[1:]
  83
  84         result_resolve_path = split(Path,'/')
  85         if len(result_resolve_path)>1:
  86             # A directory is treated (not only an object name)
  87             # We had to test if the directory where ObjRef should be recorded
  88             # is already done
  89             # If not, the new context has to be created
  90             _context_name = []
  91             for i in range(len(result_resolve_path)-1):
  92                 _context_name.append(CosNaming.NameComponent(result_resolve_path[i],"dir"))
  93
  94             try:
  95                 obj = self._current_context.resolve(_context_name)
  96                 self._current_context = obj._narrow(CosNaming.NamingContext)
  97             except CosNaming.NamingContext.NotFound, ex:
  98                 _not_exist = 1
  99             except CosNaming.NamingContext.InvalidName, ex:
 100                 MESSAGE ( "Register : CosNaming.NamingContext.InvalidName" )
 101             except CosNaming.NamingContext.CannotProceed, ex:
 102                 MESSAGE ( "Register : CosNaming.NamingContext.CannotProceed" )
 103             except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 104                 MESSAGE ( "Register : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 105
 106             if _not_exist:
 107                 # at least one context of the complete path is not created, we had
 108                 # to create it or them
 109                 _context_name = []
 110                 for i in range(len(result_resolve_path)-1):
 111                     _context_name = [CosNaming.NameComponent(result_resolve_path[i],"dir")]
 112
 113                     try:
 114                         obj = self._current_context.resolve(_context_name)
 115                         self._current_context = obj._narrow(CosNaming.NamingContext)
 116                     except CosNaming.NamingContext.NotFound, ex:
 117                         #This context is not created. It will be done
 118                         self._current_context = self._current_context.bind_new_context(_context_name)
 119
 120         #The current directory is now the directory where the object should
 121         #be recorded
 122
 123         _context_name = [CosNaming.NameComponent(result_resolve_path[len(result_resolve_path)-1],"object")]
 124         try:
 125             self._current_context.bind(_context_name,ObjRef)
 126         except CosNaming.NamingContext.NotFound, ex:
 127             MESSAGE ( "Register : CosNaming.NamingContext.NotFound" )
 128         except CosNaming.NamingContext.InvalidName, ex:
 129             MESSAGE ( "Register : CosNaming.NamingContext.InvalidName" )
 130         except CosNaming.NamingContext.CannotProceed, ex:
 131             MESSAGE ( "Register : CosNaming.NamingContext.CannotProceed" )
 132         except CosNaming.NamingContext.AlreadyBound, ex:
 133             MESSAGE ( "Register : CosNaming.NamingContext.AlreadyBound, object will be rebind" )
 134             self._current_context.rebind(_context_name,ObjRef)
 135         except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 136             MESSAGE ( "Register : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 137
 138
 139     #-------------------------------------------------------------------------
 140     def Resolve(self, Path):
 141         #MESSAGE ( "SALOME_NamingServicePy_i::Resolve" )
 142         path_list = list(Path)
 143         if path_list[0]=='/':
 144             self._current_context = self._root_context
 145             #delete first '/' before split
 146             Path=Path[1:]
 147
 148         result_resolve_path = split(Path,'/')
 149         _context_name=[]
 150         for i in range(len(result_resolve_path)-1):
 151             _context_name.append(CosNaming.NameComponent(result_resolve_path[i],"dir"))
 152         _context_name.append(CosNaming.NameComponent(result_resolve_path[len(result_resolve_path)-1],"object"))
 153         try:
 154             self._obj = self._current_context.resolve(_context_name)
 155         except CosNaming.NamingContext.NotFound, ex:
 156             MESSAGE ( "Resolve : CosNaming.NamingContext.NotFound" )
 157             self._obj = None
 158         except CosNaming.NamingContext.InvalidName, ex:
 159             MESSAGE ( "Resolve : CosNaming.NamingContext.InvalidName" )
 160             self._obj = None
 161         except CosNaming.NamingContext.CannotProceed, ex:
 162             MESSAGE ( "Resolve : CosNaming.NamingContext.CannotProceed" )
 163             self._obj = None
 164         except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 165             MESSAGE ( "Resolve : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 166             self._obj = None
 167         return self._obj
 168
 169
 170
 171     #-------------------------------------------------------------------------
 172     def Create_Directory(self,ObjRef, Path):
 173         MESSAGE ( "SALOME_NamingServicePy_i::Create_Directory" )
 174         _not_exist = 0
 175         path_list = list(Path)
 176         if path_list[0]=='/':
 177             self._current_context = self._root_context
 178             #delete first '/' before split
 179             Path=Path[1:]
 180
 181         result_resolve_path = split(Path,'/')
 182         _context_name = []
 183         for i in range(len(result_resolve_path)):
 184             _context_name[CosNaming.NameComponent(result_resolve_path[i],"dir")]
 185             try:
 186                 obj = self._current_context.resolve(_context_name)
 187                 self._current_context = obj._narrow(CosNaming.NamingContext)
 188             except CosNaming.NamingContext.NotFound, ex:
 189                 self._current_context = self._current_context.bind_new_context(_context_name)
 190             except CosNaming.NamingContext.InvalidName, ex:
 191                 MESSAGE ( "Create_Directory : CosNaming.NamingContext.InvalidName" )
 192             except CosNaming.NamingContext.CannotProceed, ex:
 193                 MESSAGE ( "Create_Directory : CosNaming.NamingContext.CannotProceed" )
 194             except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 195                 MESSAGE ( "Create_Directory : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 196
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