src/NamingService/SALOME_NamingServicePy.py

   1 #! /usr/bin/env python
   2 #  Copyright (C) 2007-2008  CEA/DEN, EDF R&D, OPEN CASCADE
   3 #
   4 #  Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
   5 #  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
   6 #
   7 #  This library is free software; you can redistribute it and/or
   8 #  modify it under the terms of the GNU Lesser General Public
   9 #  License as published by the Free Software Foundation; either
  10 #  version 2.1 of the License.
  11 #
  12 #  This library is distributed in the hope that it will be useful,
  13 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 #  Lesser General Public License for more details.
  16 #
  17 #  You should have received a copy of the GNU Lesser General Public
  18 #  License along with this library; if not, write to the Free Software
  19 #  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20 #
  21 #  See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  22 #
  23 #  SALOME NamingService : wrapping NamingService services
  24 #  File   : SALOME_NamingServicePy.py
  25 #  Author : Estelle Deville, CEA
  26 #  Module : SALOME
  27 #  $Header$
  28 #
  29 ## @package SALOME_NamingServicePy
  30 # \brief Module to manage SALOME naming service from python
  31 #
  32 #
  33
  34 import sys
  35 import time
  36 from omniORB import CORBA
  37 import CosNaming
  38 import string
  39 from string import *
  40
  41 from SALOME_utilities import *
  42 #=============================================================================
  43
  44 class SALOME_NamingServicePy_i(object):
  45     """
  46       A class to manage SALOME naming service from python code
  47     """
  48     _orb = None
  49     _root_context=None
  50     _current_context=None
  51     _obj=None
  52
  53     #-------------------------------------------------------------------------
  54
  55     def __init__(self, orb):
  56         """
  57         Standard Constructor, with ORB reference.
  58
  59         Initializes the naming service root context
  60         """
  61         #MESSAGE ( "SALOME_NamingServicePy_i::__init__" )
  62         self._orb = orb
  63         # initialize root context and current context
  64         ok = 0
  65         steps = 240
  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           sys.exit(1)
  86
  87     #-------------------------------------------------------------------------
  88
  89     def Register(self,ObjRef, Path):
  90         """ ns.Register(object,pathname )
  91
  92         register a CORBA object under a pathname
  93         """
  94
  95         MESSAGE ( "SALOME_NamingServicePy_i::Register" )
  96         _not_exist = 0
  97         path_list = list(Path)
  98         if path_list[0]=='/':
  99             self._current_context = self._root_context
 100             #delete first '/' before split
 101             Path=Path[1:]
 102
 103         result_resolve_path = string.split(Path,'/')
 104         if len(result_resolve_path)>1:
 105             # A directory is treated (not only an object name)
 106             # We had to test if the directory where ObjRef should be recorded
 107             # is already done
 108             # If not, the new context has to be created
 109             _context_name = []
 110             for i in range(len(result_resolve_path)-1):
 111                 _context_name.append(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                 _not_exist = 1
 118             except CosNaming.NamingContext.InvalidName, ex:
 119                 MESSAGE ( "Register : CosNaming.NamingContext.InvalidName" )
 120             except CosNaming.NamingContext.CannotProceed, ex:
 121                 MESSAGE ( "Register : CosNaming.NamingContext.CannotProceed" )
 122             except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 123                 MESSAGE ( "Register : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 124
 125             if _not_exist:
 126                 # at least one context of the complete path is not created, we had
 127                 # to create it or them
 128                 _context_name = []
 129                 for i in range(len(result_resolve_path)-1):
 130                     _context_name = [CosNaming.NameComponent(result_resolve_path[i],"dir")]
 131
 132                     try:
 133                         obj = self._current_context.resolve(_context_name)
 134                         self._current_context = obj._narrow(CosNaming.NamingContext)
 135                     except CosNaming.NamingContext.NotFound, ex:
 136                         #This context is not created. It will be done
 137                         self._current_context = self._current_context.bind_new_context(_context_name)
 138
 139         #The current directory is now the directory where the object should
 140         #be recorded
 141
 142         _context_name = [CosNaming.NameComponent(result_resolve_path[len(result_resolve_path)-1],"object")]
 143         try:
 144             self._current_context.bind(_context_name,ObjRef)
 145         except CosNaming.NamingContext.NotFound, ex:
 146             MESSAGE ( "Register : CosNaming.NamingContext.NotFound" )
 147         except CosNaming.NamingContext.InvalidName, ex:
 148             MESSAGE ( "Register : CosNaming.NamingContext.InvalidName" )
 149         except CosNaming.NamingContext.CannotProceed, ex:
 150             MESSAGE ( "Register : CosNaming.NamingContext.CannotProceed" )
 151         except CosNaming.NamingContext.AlreadyBound, ex:
 152             MESSAGE ( "Register : CosNaming.NamingContext.AlreadyBound, object will be rebind" )
 153             self._current_context.rebind(_context_name,ObjRef)
 154         except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 155             MESSAGE ( "Register : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 156
 157     #-------------------------------------------------------------------------
 158
 159     def Resolve(self, Path):
 160         """ ns.Resolve(pathname) -> object
 161
 162         find a CORBA object (ior) by its pathname
 163         """
 164         #MESSAGE ( "SALOME_NamingServicePy_i::Resolve" )
 165         path_list = list(Path)
 166         if path_list[0]=='/':
 167             self._current_context = self._root_context
 168             #delete first '/' before split
 169             Path=Path[1:]
 170
 171         result_resolve_path = string.split(Path,'/')
 172         _context_name=[]
 173         for i in range(len(result_resolve_path)-1):
 174             _context_name.append(CosNaming.NameComponent(result_resolve_path[i],"dir"))
 175         _context_name.append(CosNaming.NameComponent(result_resolve_path[len(result_resolve_path)-1],"object"))
 176         try:
 177             self._obj = self._current_context.resolve(_context_name)
 178         except CosNaming.NamingContext.NotFound, ex:
 179             MESSAGE ( "Resolve : CosNaming.NamingContext.NotFound" )
 180             self._obj = None
 181         except CosNaming.NamingContext.InvalidName, ex:
 182             MESSAGE ( "Resolve : CosNaming.NamingContext.InvalidName" )
 183             self._obj = None
 184         except CosNaming.NamingContext.CannotProceed, ex:
 185             MESSAGE ( "Resolve : CosNaming.NamingContext.CannotProceed" )
 186             self._obj = None
 187         except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 188             MESSAGE ( "Resolve : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 189             self._obj = None
 190         return self._obj
 191
 192
 193     #-------------------------------------------------------------------------
 194
 195     def Create_Directory(self,ObjRef, Path):
 196         """ ns.Create_Directory(ObjRef, Path)
 197
 198         create a sub directory
 199         """
 200         MESSAGE ( "SALOME_NamingServicePy_i::Create_Directory" )
 201         _not_exist = 0
 202         path_list = list(Path)
 203         if path_list[0]=='/':
 204             self._current_context = self._root_context
 205             #delete first '/' before split
 206             Path=Path[1:]
 207
 208         result_resolve_path = string.split(Path,'/')
 209         _context_name = []
 210         for i in range(len(result_resolve_path)):
 211             _context_name[CosNaming.NameComponent(result_resolve_path[i],"dir")]
 212             try:
 213                 obj = self._current_context.resolve(_context_name)
 214                 self._current_context = obj._narrow(CosNaming.NamingContext)
 215             except CosNaming.NamingContext.NotFound, ex:
 216                 self._current_context = self._current_context.bind_new_context(_context_name)
 217             except CosNaming.NamingContext.InvalidName, ex:
 218                 MESSAGE ( "Create_Directory : CosNaming.NamingContext.InvalidName" )
 219             except CosNaming.NamingContext.CannotProceed, ex:
 220                 MESSAGE ( "Create_Directory : CosNaming.NamingContext.CannotProceed" )
 221             except (CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE):
 222                 MESSAGE ( "Create_Directory : CORBA.TRANSIENT,CORBA.OBJECT_NOT_EXIST,CORBA.COMM_FAILURE" )
 223
 224     def Destroy_Name(self,Path):
 225       """ ns.Destroy_Name(Path)
 226
 227         remove a name in naming service
 228       """
 229       resolve_path=string.split(Path,'/')
 230       if resolve_path[0] == '': del resolve_path[0]
 231       dir_path=resolve_path[:-1]
 232       context_name=[]
 233       for e in dir_path:
 234          context_name.append(CosNaming.NameComponent(e,"dir"))
 235       context_name.append(CosNaming.NameComponent(resolve_path[-1],"object"))
 236
 237       try:
 238         self._root_context.unbind(context_name)
 239       except CosNaming.NamingContext.NotFound, ex:
 240         return
 241       except CORBA.Exception,ex:
 242         return
 243
 244     def Destroy_FullDirectory(self,Path):
 245       """ ns.Destroy_FullDirectory(Path)
 246
 247         remove recursively a directory
 248       """
 249       context_name=[]
 250       for e in string.split(Path,'/'):
 251         if e == '':continue
 252         context_name.append(CosNaming.NameComponent(e,"dir"))
 253
 254       try:
 255         context=self._root_context.resolve(context_name)
 256       except CosNaming.NamingContext.NotFound, ex:
 257         return
 258       except CORBA.Exception,ex:
 259         return
 260
 261       bl,bi=context.list(0)
 262       if bi is not None:
 263          ok,b=bi.next_one()
 264          while(ok):
 265             for s in b.binding_name :
 266                if s.kind == "object":
 267                   context.unbind([s])
 268                elif s.kind == "dir":
 269                   context.unbind([s])
 270             ok,b=bi.next_one()
 271
 272       context.destroy()
 273       self._root_context.unbind(context_name)