src/Container/SALOME_PyNode.py

   1 #  -*- coding: iso-8859-1 -*-
   2 # Copyright (C) 2007-2022  CEA/DEN, EDF R&D, OPEN CASCADE
   3 #
   4 # This library is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU Lesser General Public
   6 # License as published by the Free Software Foundation; either
   7 # version 2.1 of the License, or (at your option) any later version.
   8 #
   9 # This library is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Lesser General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU Lesser General Public
  15 # License along with this library; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17 #
  18 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  19 #
  20
  21 #  File   : SALOME_PyNode.py
  22 #  Author : Christian CAREMOLI, EDF
  23 #  Module : SALOME
  24 #  $Header$
  25 #
  26 import sys,traceback
  27 import linecache
  28 import pickle
  29 import Engines__POA
  30 import SALOME__POA
  31 import SALOME
  32
  33 class Generic(SALOME__POA.GenericObj):
  34   """A Python implementation of the GenericObj CORBA IDL"""
  35   def __init__(self,poa):
  36     self.poa=poa
  37     self.cnt=1
  38
  39   def Register(self):
  40     #print("Register called : %d"%self.cnt)
  41     self.cnt+=1
  42
  43   def UnRegister(self):
  44     #print("UnRegister called : %d"%self.cnt)
  45     self.cnt-=1
  46     if self.cnt <= 0:
  47       oid=self.poa.servant_to_id(self)
  48       self.poa.deactivate_object(oid)
  49
  50   def Destroy(self):
  51     print("WARNING SALOME::GenericObj::Destroy() function is obsolete! Use UnRegister() instead.")
  52     self.UnRegister()
  53
  54   def __del__(self):
  55     #print("Destuctor called")
  56     pass
  57
  58 class PyNode_i (Engines__POA.PyNode,Generic):
  59   """The implementation of the PyNode CORBA IDL"""
  60   def __init__(self, nodeName,code,poa,my_container):
  61     """Initialize the node : compilation in the local context"""
  62     Generic.__init__(self,poa)
  63     self.nodeName=nodeName
  64     self.code=code
  65     self.my_container=my_container._container
  66     linecache.cache[nodeName]=0,None,code.split('\n'),nodeName
  67     ccode=compile(code,nodeName,'exec')
  68     self.context={}
  69     self.context["my_container"] = self.my_container
  70     exec(ccode, self.context)
  71
  72   def getContainer(self):
  73     return self.my_container
  74
  75   def getCode(self):
  76     return self.code
  77
  78   def getName(self):
  79     return self.nodeName
  80
  81   def defineNewCustomVar(self,varName,valueOfVar):
  82     self.context[varName] = pickle.loads(valueOfVar)
  83     pass
  84
  85   def executeAnotherPieceOfCode(self,code):
  86     """Called for initialization of container lodging self."""
  87     try:
  88       ccode=compile(code,self.nodeName,'exec')
  89       exec(ccode, self.context)
  90     except Exception:
  91       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"","PyScriptNode (%s) : code to be executed \"%s\"" %(self.nodeName,code),0))
  92
  93   def execute(self,funcName,argsin):
  94     """Execute the function funcName found in local context with pickled args (argsin)"""
  95     try:
  96       argsin,kws=pickle.loads(argsin)
  97       func=self.context[funcName]
  98       argsout=func(*argsin,**kws)
  99       argsout=pickle.dumps(argsout,-1)
 100       return argsout
 101     except Exception:
 102       exc_typ,exc_val,exc_fr=sys.exc_info()
 103       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 104       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyNode: %s, function: %s" % (self.nodeName,funcName),0))
 105
 106 class SenderByte_i(SALOME__POA.SenderByte,Generic):
 107   def __init__(self,poa,bytesToSend):
 108     Generic.__init__(self,poa)
 109     self.bytesToSend = bytesToSend
 110
 111   def getSize(self):
 112     return len(self.bytesToSend)
 113
 114   def sendPart(self,n1,n2):
 115     return self.bytesToSend[n1:n2]
 116
 117 class SeqByteReceiver:
 118   CHUNK_SIZE = 2000000000
 119   def __init__(self,sender):
 120     self._obj = sender
 121   def __del__(self):
 122     self._obj.UnRegister()
 123     pass
 124   def data(self):
 125     size = self._obj.getSize()
 126     if size <= SeqByteReceiver.CHUNK_SIZE:
 127       return self.fetchOneShot( size )
 128     else:
 129       return self.fetchByChunks( size )
 130   def fetchOneShot(self,size):
 131     return self._obj.sendPart(0,size)
 132   def fetchByChunks(self,size):
 133       data_for_split_case = bytes(0)
 134       EFF_CHUNK_SIZE = SeqByteReceiver.CHUNK_SIZE // 8
 135       iStart = 0 ; iEnd = EFF_CHUNK_SIZE
 136       while iStart!=iEnd and iEnd <= size:
 137         part = self._obj.sendPart(iStart,iEnd)
 138         data_for_split_case = bytes(0).join( [data_for_split_case,part] )
 139         iStart = iEnd; iEnd = min(iStart + EFF_CHUNK_SIZE,size)
 140       return data_for_split_case
 141
 142 class PyScriptNode_i (Engines__POA.PyScriptNode,Generic):
 143   """The implementation of the PyScriptNode CORBA IDL that executes a script"""
 144   def __init__(self, nodeName,code,poa,my_container):
 145     """Initialize the node : compilation in the local context"""
 146     Generic.__init__(self,poa)
 147     self.nodeName=nodeName
 148     self.code=code
 149     self.my_container=my_container._container
 150     linecache.cache[nodeName]=0,None,code.split('\n'),nodeName
 151     self.ccode=compile(code,nodeName,'exec')
 152     self.context={}
 153     self.context["my_container"] = self.my_container
 154
 155   def getContainer(self):
 156     return self.my_container
 157
 158   def getCode(self):
 159     return self.code
 160
 161   def getName(self):
 162     return self.nodeName
 163
 164   def defineNewCustomVar(self,varName,valueOfVar):
 165     self.context[varName] = pickle.loads(valueOfVar)
 166     pass
 167
 168   def executeAnotherPieceOfCode(self,code):
 169     """Called for initialization of container lodging self."""
 170     try:
 171       ccode=compile(code,self.nodeName,'exec')
 172       exec(ccode, self.context)
 173     except Exception:
 174       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"","PyScriptNode (%s) : code to be executed \"%s\"" %(self.nodeName,code),0))
 175
 176   def assignNewCompiledCode(self,codeStr):
 177     try:
 178       self.code=codeStr
 179       self.ccode=compile(codeStr,self.nodeName,'exec')
 180     except Exception:
 181       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"","PyScriptNode.assignNewCompiledCode (%s) : code to be executed \"%s\"" %(self.nodeName,codeStr),0))
 182
 183   def execute(self,outargsname,argsin):
 184     """Execute the script stored in attribute ccode with pickled args (argsin)"""
 185     try:
 186       argsname,kws=pickle.loads(argsin)
 187       self.context.update(kws)
 188       exec(self.ccode, self.context)
 189       argsout=[]
 190       for arg in outargsname:
 191         if arg not in self.context:
 192           raise KeyError("There is no variable %s in context" % arg)
 193         argsout.append(self.context[arg])
 194       argsout=pickle.dumps(tuple(argsout),-1)
 195       return argsout
 196     except Exception:
 197       exc_typ,exc_val,exc_fr=sys.exc_info()
 198       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 199       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode: %s, outargsname: %s" % (self.nodeName,outargsname),0))
 200
 201   def executeFirst(self,argsin):
 202     """ Same than first part of self.execute to reduce memory peak."""
 203     import time
 204     try:
 205       data = None
 206       if True: # to force call of SeqByteReceiver's destructor
 207         argsInPy = SeqByteReceiver( argsin )
 208         data = argsInPy.data()
 209       _,kws=pickle.loads(data)
 210       self.context.update(kws)
 211     except Exception:
 212       exc_typ,exc_val,exc_fr=sys.exc_info()
 213       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 214       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode:First %s" % (self.nodeName),0))
 215
 216   def executeSecond(self,outargsname):
 217     """ Same than second part of self.execute to reduce memory peak."""
 218     try:
 219       exec(self.ccode, self.context)
 220       argsout=[]
 221       for arg in outargsname:
 222         if arg not in self.context:
 223           raise KeyError("There is no variable %s in context" % arg)
 224         argsout.append(self.context[arg])
 225       argsout=pickle.dumps(tuple(argsout),-1)
 226       ret = SenderByte_i( self.poa,argsout )
 227       id_o = self.poa.activate_object(ret)
 228       retObj = self.poa.id_to_reference(id_o)
 229       return retObj._narrow( SALOME.SenderByte )
 230     except Exception:
 231       exc_typ,exc_val,exc_fr=sys.exc_info()
 232       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 233       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode:Second %s, outargsname: %s" % (self.nodeName,outargsname),0))
 234
 235   def getValueOfVarInContext(self,varName):
 236     try:
 237       return pickle.dumps(self.context[varName],-1)
 238     except Exception:
 239       exc_typ,exc_val,exc_fr=sys.exc_info()
 240       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 241       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode: %s" %self.nodeName,0))
 242     pass
 243
 244   def assignVarInContext(self, varName, value):
 245     try:
 246       self.context[varName][0] = pickle.loads(value)
 247     except Exception:
 248       exc_typ,exc_val,exc_fr=sys.exc_info()
 249       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 250       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode: %s" %self.nodeName,0))
 251     pass
 252
 253   def callMethodOnVarInContext(self, varName, methodName, args):
 254     try:
 255       return pickle.dumps( getattr(self.context[varName][0],methodName)(*pickle.loads(args)),-1 )
 256     except Exception:
 257       exc_typ,exc_val,exc_fr=sys.exc_info()
 258       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 259       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode: %s" %self.nodeName,0))
 260     pass