src/NamingService/SALOME_NamingServicePy.py

   1 #! /usr/bin/env python
   2 #  -*- coding: iso-8859-1 -*-
   3 # Copyright (C) 2007-2014  CEA/DEN, EDF R&D, 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(object):
  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):
  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         steps = 240
  67         while steps > 0 and ok == 0:
  68           try:
  69             obj =self._orb.resolve_initial_references("NameService")
  70             self._root_context =obj._narrow(CosNaming.NamingContext)
  71             self._current_context = self._root_context
  72
  73
  74             if self._root_context is None :
  75               #MESSAGE ( "Name Service Reference is invalid" )
  76               #sys.exit(1)
  77               MESSAGE(" Name service not found")
  78             else:
  79               ok = 1
  80           except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
  81             MESSAGE(" Name service not found")
  82           time.sleep(0.25)
  83           steps = steps - 1
  84         if steps == 0 and self._root_context is None:
  85           MESSAGE ( "Name Service Reference is invalid" )
  86           sys.exit(1)
  87
  88     #-------------------------------------------------------------------------
  89
  90     def Register(self,ObjRef, Path):
  91         """ ns.Register(object,pathname )
  92
  93         register a CORBA object under a pathname
  94         """
  95
  96         MESSAGE ( "SALOME_NamingServicePy_i::Register" )
  97         _not_exist = 0
  98         path_list = list(Path)
  99         if path_list[0]=='/':
 100             self._current_context = self._root_context
 101             #delete first '/' before split
 102             Path=Path[1:]
 103
 104         result_resolve_path = string.split(Path,'/')
 105         if len(result_resolve_path)>1:
 106             # A directory is treated (not only an object name)
 107             # We had to test if the directory where ObjRef should be recorded
 108             # is already done
 109             # If not, the new context has to be created
 110             _context_name = []
 111             for i in range(len(result_resolve_path)-1):
 112                 _context_name.append(CosNaming.NameComponent(result_resolve_path[i],"dir"))
 113
 114             try:
 115                 obj = self._current_context.resolve(_context_name)
 116                 self._current_context = obj._narrow(CosNaming.NamingContext)
 117             except CosNaming.NamingContext.NotFound, ex:
 118                 _not_exist = 1
 119             except CosNaming.NamingContext.InvalidName, ex:
 120                 MESSAGE ( "Register : CosNaming.NamingContext.InvalidName" )
 121             except CosNaming.NamingContext.CannotProceed, ex:
 122                 MESSAGE ( "Register : CosNaming.NamingContext.CannotProceed" )
 123             except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 124                 MESSAGE ( "Register : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 125
 126             if _not_exist:
 127                 # at least one context of the complete path is not created, we had
 128                 # to create it or them
 129                 _context_name = []
 130                 for i in range(len(result_resolve_path)-1):
 131                     _context_name = [CosNaming.NameComponent(result_resolve_path[i],"dir")]
 132
 133                     try:
 134                         obj = self._current_context.resolve(_context_name)
 135                         self._current_context = obj._narrow(CosNaming.NamingContext)
 136                     except CosNaming.NamingContext.NotFound, ex:
 137                         #This context is not created. It will be done
 138                         self._current_context = self._current_context.bind_new_context(_context_name)
 139
 140         #The current directory is now the directory where the object should
 141         #be recorded
 142
 143         _context_name = [CosNaming.NameComponent(result_resolve_path[len(result_resolve_path)-1],"object")]
 144         try:
 145             self._current_context.bind(_context_name,ObjRef)
 146         except CosNaming.NamingContext.NotFound, ex:
 147             MESSAGE ( "Register : CosNaming.NamingContext.NotFound" )
 148         except CosNaming.NamingContext.InvalidName, ex:
 149             MESSAGE ( "Register : CosNaming.NamingContext.InvalidName" )
 150         except CosNaming.NamingContext.CannotProceed, ex:
 151             MESSAGE ( "Register : CosNaming.NamingContext.CannotProceed" )
 152         except CosNaming.NamingContext.AlreadyBound, ex:
 153             MESSAGE ( "Register : CosNaming.NamingContext.AlreadyBound, object will be rebind" )
 154             self._current_context.rebind(_context_name,ObjRef)
 155         except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 156             MESSAGE ( "Register : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 157
 158     #-------------------------------------------------------------------------
 159
 160     def Resolve(self, Path):
 161         """ ns.Resolve(pathname) -> object
 162
 163         find a CORBA object (ior) by its pathname
 164         """
 165         #MESSAGE ( "SALOME_NamingServicePy_i::Resolve" )
 166         path_list = list(Path)
 167         if path_list[0]=='/':
 168             self._current_context = self._root_context
 169             #delete first '/' before split
 170             Path=Path[1:]
 171
 172         result_resolve_path = string.split(Path,'/')
 173         _context_name=[]
 174         for i in range(len(result_resolve_path)-1):
 175             _context_name.append(CosNaming.NameComponent(result_resolve_path[i],"dir"))
 176         _context_name.append(CosNaming.NameComponent(result_resolve_path[len(result_resolve_path)-1],"object"))
 177         try:
 178             self._obj = self._current_context.resolve(_context_name)
 179         except CosNaming.NamingContext.NotFound, ex:
 180             MESSAGE ( "Resolve : CosNaming.NamingContext.NotFound" )
 181             self._obj = None
 182         except CosNaming.NamingContext.InvalidName, ex:
 183             MESSAGE ( "Resolve : CosNaming.NamingContext.InvalidName" )
 184             self._obj = None
 185         except CosNaming.NamingContext.CannotProceed, ex:
 186             MESSAGE ( "Resolve : CosNaming.NamingContext.CannotProceed" )
 187             self._obj = None
 188         except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 189             MESSAGE ( "Resolve : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 190             self._obj = None
 191         return self._obj
 192
 193
 194     #-------------------------------------------------------------------------
 195
 196     def Create_Directory(self,ObjRef, Path):
 197         """ ns.Create_Directory(ObjRef, Path)
 198
 199         create a sub directory
 200         """
 201         MESSAGE ( "SALOME_NamingServicePy_i::Create_Directory" )
 202         _not_exist = 0
 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 = string.split(Path,'/')
 210         _context_name = []
 211         for i in range(len(result_resolve_path)):
 212             _context_name[CosNaming.NameComponent(result_resolve_path[i],"dir")]
 213             try:
 214                 obj = self._current_context.resolve(_context_name)
 215                 self._current_context = obj._narrow(CosNaming.NamingContext)
 216             except CosNaming.NamingContext.NotFound, ex:
 217                 self._current_context = self._current_context.bind_new_context(_context_name)
 218             except CosNaming.NamingContext.InvalidName, ex:
 219                 MESSAGE ( "Create_Directory : CosNaming.NamingContext.InvalidName" )
 220             except CosNaming.NamingContext.CannotProceed, ex:
 221                 MESSAGE ( "Create_Directory : CosNaming.NamingContext.CannotProceed" )
 222             except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 223                 MESSAGE ( "Create_Directory : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 224
 225     def Destroy_Name(self,Path):
 226       """ ns.Destroy_Name(Path)
 227
 228         remove a name in naming service
 229       """
 230       resolve_path=string.split(Path,'/')
 231       if resolve_path[0] == '': del resolve_path[0]
 232       dir_path=resolve_path[:-1]
 233       context_name=[]
 234       for e in dir_path:
 235          context_name.append(CosNaming.NameComponent(e,"dir"))
 236       context_name.append(CosNaming.NameComponent(resolve_path[-1],"object"))
 237
 238       try:
 239         self._root_context.unbind(context_name)
 240       except CosNaming.NamingContext.NotFound, ex:
 241         return
 242       except CORBA.Exception,ex:
 243         return
 244
 245     def Destroy_FullDirectory(self,Path):
 246       """ ns.Destroy_FullDirectory(Path)
 247
 248         remove recursively a directory
 249       """
 250       context_name=[]
 251       for e in string.split(Path,'/'):
 252         if e == '':continue
 253         context_name.append(CosNaming.NameComponent(e,"dir"))
 254
 255       try:
 256         context=self._root_context.resolve(context_name)
 257       except CosNaming.NamingContext.NotFound, ex:
 258         return
 259       except CORBA.Exception,ex:
 260         return
 261
 262       bl,bi=context.list(0)
 263       if bi is not None:
 264          ok,b=bi.next_one()
 265          while(ok):
 266             for s in b.binding_name :
 267                if s.kind == "object":
 268                   context.unbind([s])
 269                elif s.kind == "dir":
 270                   context.unbind([s])
 271             ok,b=bi.next_one()
 272
 273       context.destroy()
 274       self._root_context.unbind(context_name)