src/NamingService/SALOME_NamingServicePy.py

   1 #! /usr/bin/env python3
   2 #  -*- coding: iso-8859-1 -*-
   3 # Copyright (C) 2007-2023  CEA, EDF, OPEN CASCADE
   4 #
   5 # Copyright (C) 2003-2007  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, or (at your option) any later version.
  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.salome-platform.org/ or email : webmaster.salome@opencascade.com
  23 #
  24
  25 #  SALOME NamingService : wrapping NamingService services
  26 #  File   : SALOME_NamingServicePy.py
  27 #  Author : Estelle Deville, CEA
  28 #  Module : SALOME
  29 #  $Header$
  30 ## @package SALOME_NamingServicePy
  31 # \brief Module to manage SALOME naming service from python
  32 #
  33 import sys
  34 import time
  35 from omniORB import CORBA
  36 import CosNaming
  37 import string
  38 from string import *
  39
  40 from SALOME_utilities import *
  41 #=============================================================================
  42
  43 class SALOME_NamingServicePy_i:
  44     """
  45       A class to manage SALOME naming service from python code
  46     """
  47     _orb = None
  48     _root_context=None
  49     _current_context=None
  50     _obj=None
  51
  52     #-------------------------------------------------------------------------
  53
  54     def __init__(self, orb=None, steps=240, spy=False):
  55         """
  56         Standard Constructor, with ORB reference.
  57
  58         Initializes the naming service root context
  59         """
  60         #MESSAGE ( "SALOME_NamingServicePy_i::__init__" )
  61         if orb is None:
  62           orb=CORBA.ORB_init([''], CORBA.ORB_ID)
  63         self._orb = orb
  64         # initialize root context and current context
  65         ok = 0
  66         while steps > 0 and ok == 0:
  67           try:
  68             obj =self._orb.resolve_initial_references("NameService")
  69             self._root_context =obj._narrow(CosNaming.NamingContext)
  70             self._current_context = self._root_context
  71
  72
  73             if self._root_context is None :
  74               #MESSAGE ( "Name Service Reference is invalid" )
  75               #sys.exit(1)
  76               MESSAGE(" Name service not found")
  77             else:
  78               ok = 1
  79           except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
  80             MESSAGE(" Name service not found")
  81           time.sleep(0.25)
  82           steps = steps - 1
  83         if steps == 0 and self._root_context is None:
  84           MESSAGE ( "Name Service Reference is invalid" )
  85           if spy:
  86             raise ValueError("Name Service Reference is invalid")
  87           else:
  88             sys.exit(1)
  89
  90     #-------------------------------------------------------------------------
  91
  92     def Register(self,ObjRef, Path):
  93         """ ns.Register(object,pathname )
  94
  95         register a CORBA object under a pathname
  96         """
  97
  98         MESSAGE ( "SALOME_NamingServicePy_i::Register" )
  99         _not_exist = 0
 100         path_list = list(Path)
 101         if path_list[0]=='/':
 102             self._current_context = self._root_context
 103             #delete first '/' before split
 104             Path=Path[1:]
 105
 106         result_resolve_path = Path.split('/')
 107         if len(result_resolve_path)>1:
 108             # A directory is treated (not only an object name)
 109             # We had to test if the directory where ObjRef should be recorded
 110             # is already done
 111             # If not, the new context has to be created
 112             _context_name = []
 113             for i in range(len(result_resolve_path)-1):
 114                 _context_name.append(CosNaming.NameComponent(result_resolve_path[i],"dir"))
 115
 116             try:
 117                 obj = self._current_context.resolve(_context_name)
 118                 self._current_context = obj._narrow(CosNaming.NamingContext)
 119             except CosNaming.NamingContext.NotFound as ex:
 120                 _not_exist = 1
 121             except CosNaming.NamingContext.InvalidName as ex:
 122                 MESSAGE ( "Register : CosNaming.NamingContext.InvalidName" )
 123             except CosNaming.NamingContext.CannotProceed as ex:
 124                 MESSAGE ( "Register : CosNaming.NamingContext.CannotProceed" )
 125             except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 126                 MESSAGE ( "Register : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 127
 128             if _not_exist:
 129                 # at least one context of the complete path is not created, we had
 130                 # to create it or them
 131                 _context_name = []
 132                 for i in range(len(result_resolve_path)-1):
 133                     _context_name = [CosNaming.NameComponent(result_resolve_path[i],"dir")]
 134
 135                     try:
 136                         obj = self._current_context.resolve(_context_name)
 137                         self._current_context = obj._narrow(CosNaming.NamingContext)
 138                     except CosNaming.NamingContext.NotFound as ex:
 139                         #This context is not created. It will be done
 140                         self._current_context = self._current_context.bind_new_context(_context_name)
 141
 142         #The current directory is now the directory where the object should
 143         #be recorded
 144
 145         _context_name = [CosNaming.NameComponent(result_resolve_path[len(result_resolve_path)-1],"object")]
 146         try:
 147             self._current_context.bind(_context_name,ObjRef)
 148         except CosNaming.NamingContext.NotFound as ex:
 149             MESSAGE ( "Register : CosNaming.NamingContext.NotFound" )
 150         except CosNaming.NamingContext.InvalidName as ex:
 151             MESSAGE ( "Register : CosNaming.NamingContext.InvalidName" )
 152         except CosNaming.NamingContext.CannotProceed as ex:
 153             MESSAGE ( "Register : CosNaming.NamingContext.CannotProceed" )
 154         except CosNaming.NamingContext.AlreadyBound as ex:
 155             MESSAGE ( "Register : CosNaming.NamingContext.AlreadyBound, object will be rebind" )
 156             self._current_context.rebind(_context_name,ObjRef)
 157         except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 158             MESSAGE ( "Register : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 159
 160     #-------------------------------------------------------------------------
 161
 162     def Resolve(self, Path):
 163         """ ns.Resolve(pathname) -> object
 164
 165         find a CORBA object (ior) by its pathname
 166         """
 167         #MESSAGE ( "SALOME_NamingServicePy_i::Resolve" )
 168         path_list = list(Path)
 169         if path_list[0]=='/':
 170             self._current_context = self._root_context
 171             #delete first '/' before split
 172             Path=Path[1:]
 173
 174         result_resolve_path = Path.split('/')
 175         _context_name=[]
 176         for i in range(len(result_resolve_path)-1):
 177             _context_name.append(CosNaming.NameComponent(result_resolve_path[i],"dir"))
 178         _context_name.append(CosNaming.NameComponent(result_resolve_path[len(result_resolve_path)-1],"object"))
 179         try:
 180             self._obj = self._current_context.resolve(_context_name)
 181         except CosNaming.NamingContext.NotFound as ex:
 182             MESSAGE ( "Resolve : CosNaming.NamingContext.NotFound" )
 183             self._obj = None
 184         except CosNaming.NamingContext.InvalidName as ex:
 185             MESSAGE ( "Resolve : CosNaming.NamingContext.InvalidName" )
 186             self._obj = None
 187         except CosNaming.NamingContext.CannotProceed as ex:
 188             MESSAGE ( "Resolve : CosNaming.NamingContext.CannotProceed" )
 189             self._obj = None
 190         except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 191             MESSAGE ( "Resolve : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 192             self._obj = None
 193         return self._obj
 194
 195     #-------------------------------------------------------------------------
 196
 197     def Resolve_Dir(self, Path):
 198         """ ns.Resolve_Dir(pathname) -> dir
 199
 200         find a CORBA object (ior) by its pathname
 201         """
 202         #MESSAGE ( "SALOME_NamingServicePy_i::Resolve" )
 203         path_list = list(Path)
 204         if path_list[0]=='/':
 205             self._current_context = self._root_context
 206             #delete first '/' before split
 207             Path=Path[1:]
 208
 209         result_resolve_path = Path.split('/')
 210         _context_name=[]
 211         for i in range(len(result_resolve_path)-1):
 212             _context_name.append(CosNaming.NameComponent(result_resolve_path[i],"dir"))
 213         _context_name.append(CosNaming.NameComponent(result_resolve_path[len(result_resolve_path)-1],"dir"))
 214         print(_context_name)
 215         return None
 216         try:
 217             self._obj = self._current_context.resolve(_context_name)
 218         except CosNaming.NamingContext.NotFound as ex:
 219             MESSAGE ( "Resolve : CosNaming.NamingContext.NotFound" )
 220             self._obj = None
 221         except CosNaming.NamingContext.InvalidName as ex:
 222             MESSAGE ( "Resolve : CosNaming.NamingContext.InvalidName" )
 223             self._obj = None
 224         except CosNaming.NamingContext.CannotProceed as ex:
 225             MESSAGE ( "Resolve : CosNaming.NamingContext.CannotProceed" )
 226             self._obj = None
 227         except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 228             MESSAGE ( "Resolve : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 229             self._obj = None
 230         return self._obj
 231
 232
 233     #-------------------------------------------------------------------------
 234
 235     def Create_Directory(self,ObjRef, Path):
 236         """ ns.Create_Directory(ObjRef, Path)
 237
 238         create a sub directory
 239         """
 240         MESSAGE ( "SALOME_NamingServicePy_i::Create_Directory" )
 241         _not_exist = 0
 242         path_list = list(Path)
 243         if path_list[0]=='/':
 244             self._current_context = self._root_context
 245             #delete first '/' before split
 246             Path=Path[1:]
 247
 248         result_resolve_path = Path.split('/')
 249         _context_name = []
 250         for i in range(len(result_resolve_path)):
 251             _context_name[CosNaming.NameComponent(result_resolve_path[i],"dir")]
 252             try:
 253                 obj = self._current_context.resolve(_context_name)
 254                 self._current_context = obj._narrow(CosNaming.NamingContext)
 255             except CosNaming.NamingContext.NotFound as ex:
 256                 self._current_context = self._current_context.bind_new_context(_context_name)
 257             except CosNaming.NamingContext.InvalidName as ex:
 258                 MESSAGE ( "Create_Directory : CosNaming.NamingContext.InvalidName" )
 259             except CosNaming.NamingContext.CannotProceed as ex:
 260                 MESSAGE ( "Create_Directory : CosNaming.NamingContext.CannotProceed" )
 261             except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 262                 MESSAGE ( "Create_Directory : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 263
 264     def Destroy_Name(self,Path):
 265       """ ns.Destroy_Name(Path)
 266
 267         remove a name in naming service
 268       """
 269       resolve_path=Path.split('/')
 270       if resolve_path[0] == '': del resolve_path[0]
 271       dir_path=resolve_path[:-1]
 272       context_name=[]
 273       for e in dir_path:
 274          context_name.append(CosNaming.NameComponent(e,"dir"))
 275       context_name.append(CosNaming.NameComponent(resolve_path[-1],"object"))
 276
 277       try:
 278         self._root_context.unbind(context_name)
 279       except CosNaming.NamingContext.NotFound as ex:
 280         return
 281       except CORBA.Exception as ex:
 282         return
 283
 284     def Destroy_FullDirectory(self,Path):
 285       """ ns.Destroy_FullDirectory(Path)
 286
 287         remove recursively a directory
 288       """
 289       context_name=[]
 290       for e in Path.split('/'):
 291         if e == '':continue
 292         context_name.append(CosNaming.NameComponent(e,"dir"))
 293
 294       try:
 295         context=self._root_context.resolve(context_name)
 296       except CosNaming.NamingContext.NotFound as ex:
 297         return
 298       except CORBA.Exception as ex:
 299         return
 300
 301       bl,bi=context.list(0)
 302       if bi is not None:
 303          ok,b=bi.next_one()
 304          while(ok):
 305             for s in b.binding_name :
 306                if s.kind == "object":
 307                   context.unbind([s])
 308                elif s.kind == "dir":
 309                   context.unbind([s])
 310             ok,b=bi.next_one()
 311
 312       context.destroy()
 313       self._root_context.unbind(context_name)