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  51     print("WARNING SALOME::GenericObj::Destroy() function is obsolete!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 SALOME_FILE_BIG_OBJ_DIR = "SALOME_FILE_BIG_OBJ_DIR"
 118
 119 SALOME_BIG_OBJ_ON_DISK_THRES_VAR = "SALOME_BIG_OBJ_ON_DISK_THRES"
 120
 121 # default is 50 MB
 122 SALOME_BIG_OBJ_ON_DISK_THRES_DFT = 50000000
 123
 124 def GetBigObjectOnDiskThreshold():
 125   import os
 126   if SALOME_BIG_OBJ_ON_DISK_THRES_VAR in os.environ:
 127     return int( os.environ[SALOME_BIG_OBJ_ON_DISK_THRES_VAR] )
 128   else:
 129     return SALOME_BIG_OBJ_ON_DISK_THRES_DFT
 130
 131 def GetBigObjectDirectory():
 132   import os
 133   if SALOME_FILE_BIG_OBJ_DIR not in os.environ:
 134     raise RuntimeError("An object of size higher than limit detected and no directory specified to dump it in file !")
 135   return os.path.expandvars( os.path.expandvars( os.environ[SALOME_FILE_BIG_OBJ_DIR] ) )
 136
 137 def GetBigObjectFileName():
 138   """
 139   Return a filename in the most secure manner (see tempfile documentation)
 140   """
 141   import tempfile
 142   with tempfile.NamedTemporaryFile(dir=GetBigObjectDirectory(),prefix="mem_",suffix=".pckl") as f:
 143     ret = f.name
 144   return ret
 145
 146 class BigObjectOnDiskBase:
 147   def __init__(self, fileName, objSerialized):
 148     """
 149     :param fileName: the file used to dump into.
 150     :param objSerialized: the object in pickeled form
 151     :type objSerialized: bytes
 152     """
 153     self._filename = fileName
 154     self._destroy = False
 155     self.__dumpIntoFile(objSerialized)
 156
 157   def getDestroyStatus(self):
 158     return self._destroy
 159
 160   def unlinkOnDestructor(self):
 161     self._destroy = True
 162
 163   def doNotTouchFile(self):
 164     """
 165     Method called slave side. The life cycle management of file is client side not slave side.
 166     """
 167     self._destroy = False
 168
 169   def __del__(self):
 170     if self._destroy:
 171       import os
 172       os.unlink( self._filename )
 173
 174   def getFileName(self):
 175     return self._filename
 176
 177   def __dumpIntoFile(self, objSerialized):
 178     with open(self._filename,"wb") as f:
 179       f.write(objSerialized)
 180
 181   def get(self):
 182     import pickle
 183     with open(self._filename,"rb") as f:
 184       return pickle.load(f)
 185
 186 class BigObjectOnDisk(BigObjectOnDiskBase):
 187   def __init__(self, fileName, objSerialized):
 188     BigObjectOnDiskBase.__init__(self, fileName, objSerialized)
 189
 190 class BigObjectOnDiskListElement(BigObjectOnDiskBase):
 191   def __init__(self, pos, length, fileName):
 192     self._filename = fileName
 193     self._destroy = False
 194     self._pos = pos
 195     self._length = length
 196
 197   def get(self):
 198     fullObj = BigObjectOnDiskBase.get(self)
 199     return fullObj[ self._pos ]
 200
 201 class BigObjectOnDiskSequence(BigObjectOnDiskBase):
 202   def __init__(self, length, fileName, objSerialized):
 203     BigObjectOnDiskBase.__init__(self, fileName, objSerialized)
 204     self._length = length
 205
 206   def __getitem__(self, i):
 207     return BigObjectOnDiskListElement(i, self._length, self.getFileName())
 208
 209   def __len__(self):
 210     return self._length
 211
 212 class BigObjectOnDiskList(BigObjectOnDiskSequence):
 213   def __init__(self, length, fileName, objSerialized):
 214     BigObjectOnDiskSequence.__init__(self, length, fileName, objSerialized)
 215
 216 class BigObjectOnDiskTuple(BigObjectOnDiskSequence):
 217   def __init__(self, length, fileName, objSerialized):
 218     BigObjectOnDiskSequence.__init__(self, length, fileName, objSerialized)
 219
 220 def SpoolPickleObject( obj ):
 221   import pickle
 222   pickleObjInit = pickle.dumps( obj , pickle.HIGHEST_PROTOCOL )
 223   if len(pickleObjInit) < GetBigObjectOnDiskThreshold():
 224     return pickleObjInit
 225   else:
 226     if isinstance( obj, list):
 227       proxyObj = BigObjectOnDiskList( len(obj), GetBigObjectFileName() , pickleObjInit )
 228     elif isinstance( obj, tuple):
 229       proxyObj = BigObjectOnDiskTuple( len(obj), GetBigObjectFileName() , pickleObjInit )
 230     else:
 231       proxyObj = BigObjectOnDisk( GetBigObjectFileName() , pickleObjInit )
 232     pickleProxy = pickle.dumps( proxyObj , pickle.HIGHEST_PROTOCOL )
 233     return pickleProxy
 234
 235 def UnProxyObject( obj ):
 236   if isinstance(obj,BigObjectOnDiskBase):
 237     obj.doNotTouchFile()
 238     return obj.get()
 239   if isinstance(obj,list) or isinstance(obj,tuple):
 240     for elt in obj:
 241       if isinstance(elt,BigObjectOnDiskBase):
 242         elt.doNotTouchFile()
 243     return obj
 244   else:
 245     return obj
 246
 247 class SeqByteReceiver:
 248   # 2GB limit to trigger split into chunks
 249   CHUNK_SIZE = 2000000000
 250   def __init__(self,sender):
 251     self._obj = sender
 252   def __del__(self):
 253     self._obj.UnRegister()
 254     pass
 255   def data(self):
 256     size = self._obj.getSize()
 257     if size <= SeqByteReceiver.CHUNK_SIZE:
 258       return self.fetchOneShot( size )
 259     else:
 260       return self.fetchByChunks( size )
 261   def fetchOneShot(self,size):
 262     return self._obj.sendPart(0,size)
 263   def fetchByChunks(self,size):
 264       """
 265       To avoid memory peak parts over 2GB are sent using EFF_CHUNK_SIZE size.
 266       """
 267       data_for_split_case = bytes(0)
 268       EFF_CHUNK_SIZE = SeqByteReceiver.CHUNK_SIZE // 8
 269       iStart = 0 ; iEnd = EFF_CHUNK_SIZE
 270       while iStart!=iEnd and iEnd <= size:
 271         part = self._obj.sendPart(iStart,iEnd)
 272         data_for_split_case = bytes(0).join( [data_for_split_case,part] )
 273         iStart = iEnd; iEnd = min(iStart + EFF_CHUNK_SIZE,size)
 274       return data_for_split_case
 275
 276 class PyScriptNode_i (Engines__POA.PyScriptNode,Generic):
 277   """The implementation of the PyScriptNode CORBA IDL that executes a script"""
 278   def __init__(self, nodeName,code,poa,my_container):
 279     """Initialize the node : compilation in the local context"""
 280     Generic.__init__(self,poa)
 281     self.nodeName=nodeName
 282     self.code=code
 283     self.my_container=my_container._container
 284     linecache.cache[nodeName]=0,None,code.split('\n'),nodeName
 285     self.ccode=compile(code,nodeName,'exec')
 286     self.context={}
 287     self.context["my_container"] = self.my_container
 288
 289   def getContainer(self):
 290     return self.my_container
 291
 292   def getCode(self):
 293     return self.code
 294
 295   def getName(self):
 296     return self.nodeName
 297
 298   def defineNewCustomVar(self,varName,valueOfVar):
 299     self.context[varName] = pickle.loads(valueOfVar)
 300     pass
 301
 302   def executeAnotherPieceOfCode(self,code):
 303     """Called for initialization of container lodging self."""
 304     try:
 305       ccode=compile(code,self.nodeName,'exec')
 306       exec(ccode, self.context)
 307     except Exception:
 308       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"","PyScriptNode (%s) : code to be executed \"%s\"" %(self.nodeName,code),0))
 309
 310   def assignNewCompiledCode(self,codeStr):
 311     try:
 312       self.code=codeStr
 313       self.ccode=compile(codeStr,self.nodeName,'exec')
 314     except Exception:
 315       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"","PyScriptNode.assignNewCompiledCode (%s) : code to be executed \"%s\"" %(self.nodeName,codeStr),0))
 316
 317   def execute(self,outargsname,argsin):
 318     """Execute the script stored in attribute ccode with pickled args (argsin)"""
 319     try:
 320       argsname,kws=pickle.loads(argsin)
 321       self.context.update(kws)
 322       exec(self.ccode, self.context)
 323       argsout=[]
 324       for arg in outargsname:
 325         if arg not in self.context:
 326           raise KeyError("There is no variable %s in context" % arg)
 327         argsout.append(self.context[arg])
 328       argsout=pickle.dumps(tuple(argsout),-1)
 329       return argsout
 330     except Exception:
 331       exc_typ,exc_val,exc_fr=sys.exc_info()
 332       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 333       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode: %s, outargsname: %s" % (self.nodeName,outargsname),0))
 334
 335   def executeFirst(self,argsin):
 336     """ Same than first part of self.execute to reduce memory peak."""
 337     import time
 338     try:
 339       data = None
 340       if True: # to force call of SeqByteReceiver's destructor
 341         argsInPy = SeqByteReceiver( argsin )
 342         data = argsInPy.data()
 343       _,kws=pickle.loads(data)
 344       for elt in kws:
 345         # fetch real data if necessary
 346         kws[elt] = UnProxyObject( kws[elt] )
 347       self.context.update(kws)
 348     except Exception:
 349       exc_typ,exc_val,exc_fr=sys.exc_info()
 350       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 351       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode:First %s" % (self.nodeName),0))
 352
 353   def executeSecond(self,outargsname):
 354     """ Same than second part of self.execute to reduce memory peak."""
 355     try:
 356       exec(self.ccode, self.context)
 357       argsout=[]
 358       for arg in outargsname:
 359         if arg not in self.context:
 360           raise KeyError("There is no variable %s in context" % arg)
 361         argsout.append(self.context[arg])
 362       ret = [ ]
 363       for arg in argsout:
 364         # the proxy mecanism is catched here
 365         argPickle = SpoolPickleObject( arg )
 366         retArg = SenderByte_i( self.poa,argPickle )
 367         id_o = self.poa.activate_object(retArg)
 368         retObj = self.poa.id_to_reference(id_o)
 369         ret.append( retObj._narrow( SALOME.SenderByte ) )
 370       return ret
 371     except Exception:
 372       exc_typ,exc_val,exc_fr=sys.exc_info()
 373       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 374       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode:Second %s, outargsname: %s" % (self.nodeName,outargsname),0))
 375
 376   def listAllVarsInContext(self):
 377       import re
 378       pat = re.compile("^__([a-z]+)__$")
 379       return [elt for elt in self.context if not pat.match(elt)]
 380
 381   def removeAllVarsInContext(self):
 382       for elt in self.listAllVarsInContext():
 383         del self.context[elt]
 384
 385   def getValueOfVarInContext(self,varName):
 386     try:
 387       return pickle.dumps(self.context[varName],-1)
 388     except Exception:
 389       exc_typ,exc_val,exc_fr=sys.exc_info()
 390       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 391       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode: %s" %self.nodeName,0))
 392     pass
 393
 394   def assignVarInContext(self, varName, value):
 395     try:
 396       self.context[varName][0] = pickle.loads(value)
 397     except Exception:
 398       exc_typ,exc_val,exc_fr=sys.exc_info()
 399       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 400       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode: %s" %self.nodeName,0))
 401     pass
 402
 403   def callMethodOnVarInContext(self, varName, methodName, args):
 404     try:
 405       return pickle.dumps( getattr(self.context[varName][0],methodName)(*pickle.loads(args)),-1 )
 406     except Exception:
 407       exc_typ,exc_val,exc_fr=sys.exc_info()
 408       l=traceback.format_exception(exc_typ,exc_val,exc_fr)
 409       raise SALOME.SALOME_Exception(SALOME.ExceptionStruct(SALOME.BAD_PARAM,"".join(l),"PyScriptNode: %s" %self.nodeName,0))
 410     pass