src/LifeCycleCORBA/LifeCycleCORBA.py

   1 #  SALOME LifeCycleC RBA : implementation of containers and engines life cycle both in Python and C++
   2 #
   3 #  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
   4 #  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
   5 #
   6 #  This library is free software; you can redistribute it and/or
   7 #  modify it under the terms of the GNU Lesser General Public
   8 #  License as published by the Free Software Foundation; either
   9 #  version 2.1 of the License.
  10 #
  11 #  This library is distributed in the hope that it will be useful,
  12 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 #  Lesser General Public License for more details.
  15 #
  16 #  You should have received a copy of the GNU Lesser General Public
  17 #  License along with this library; if not, write to the Free Software
  18 #  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19 #
  20 #  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
  21 #
  22 #
  23 #
  24 #  File   : LifeCycleCORBA.py
  25 #  Author : Paul RASCLE, EDF
  26 #  Module : SALOME
  27 #  $Header$
  28
  29 import os
  30 import sys
  31 import time
  32 import string
  33 from omniORB import CORBA
  34 import CosNaming
  35 import Engines
  36 import SALOME_ModuleCatalog
  37
  38 from SALOME_utilities import *
  39 from Utils_Identity import getShortHostName
  40
  41 class LifeCycleCORBA:
  42     _orb = None
  43     _rootcontext = None
  44     _containerRootContext = None
  45     _catalog = None
  46
  47     #-------------------------------------------------------------------------
  48
  49     def __init__(self, orb):
  50         MESSAGE( "LifeCycleCORBA::__init__" )
  51         self._orb = orb
  52
  53         obj = self._orb.resolve_initial_references("NameService")
  54         self._rootContext = obj._narrow(CosNaming.NamingContext)
  55
  56         if self._rootContext is None:
  57             MESSAGE( "Name Service Reference is invalid" )
  58
  59         name = [CosNaming.NameComponent("Containers","dir")]
  60         try:
  61             self._containerRootContext = self._rootContext.bind_new_context(name)
  62
  63         except CosNaming.NamingContext.AlreadyBound, ex:
  64             MESSAGE( "/Containers.dir Context already exists" )
  65             obj = self._rootContext.resolve(name)
  66             self._containerRootContext = obj._narrow(CosNaming.NamingContext)
  67             if self._containerRootContext is None:
  68                 MESSAGE( "Containers.dir exists but it is not a NamingContext" )
  69
  70         name = [CosNaming.NameComponent("Kernel","dir"),
  71                 CosNaming.NameComponent("ModulCatalog","object")]
  72         try:
  73             obj = self._rootContext.resolve(name)
  74         except CosNaming.NamingContext.NotFound, ex:
  75             MESSAGE( "/Kernel.dir/ModulCatalog.object not found in Naming Service" )
  76
  77         self._catalog = obj._narrow(SALOME_ModuleCatalog.ModuleCatalog)
  78         if self._catalog is None:
  79             MESSAGE( "/Kernel.dir/ModulCatalog.object exists but is not a ModulCatalog" )
  80
  81         name = [CosNaming.NameComponent("ContainerManager","object")]
  82         try:
  83             obj = self._rootContext.resolve(name)
  84         except CosNaming.NamingContext.NotFound, ex:
  85             MESSAGE( "ContainerManager.object not found in Naming Service" )
  86         self._contManager = obj._narrow(Engines.ContainerManager)
  87         if self._contManager is None:
  88             MESSAGE( "ContainerManager.object exists but is not a ContainerManager")
  89
  90     #-------------------------------------------------------------------------
  91
  92     def ContainerName(self, containerName):
  93         theComputer = ""
  94         try:
  95             theComputer , theContainer = containerName.split('/')
  96         except:
  97             theComputer = ""
  98             theContainer = containerName
  99         if theComputer == "" :
 100             theComputer = getShortHostName()
 101         if theComputer == "localhost" :
 102             theComputer = getShortHostName()
 103         computerSplitName = theComputer.split('.')
 104         theComputer = computerSplitName[0]
 105         MESSAGE( theComputer + theContainer )
 106         return theComputer,theContainer
 107
 108     #-------------------------------------------------------------------------
 109
 110     def ComputerPath(self, ComputerName ):
 111         try:
 112             #path = self._catalog.GetPathPrefix( ComputerName )
 113             path = os.getenv("KERNEL_ROOT_DIR") + "/bin/salome/"
 114         except SALOME_ModuleCatalog.NotFound, ex:
 115             path = ""
 116         return path
 117
 118     #-------------------------------------------------------------------------
 119
 120     def FindContainer(self, containerName):
 121         theComputer,theContainer = self.ContainerName( containerName )
 122         name = [CosNaming.NameComponent(theComputer,"dir"),
 123                 CosNaming.NameComponent(theContainer,"object")]
 124         obj = None
 125         try:
 126             obj = self._containerRootContext.resolve(name)
 127             MESSAGE( containerName + ".object found in Naming Service" )
 128
 129         except CosNaming.NamingContext.NotFound, ex:
 130             MESSAGE( containerName + ".object not found in Naming Service" )
 131
 132         if obj is None:
 133             container = None
 134         else:
 135             container = obj._narrow(Engines.Container)
 136             if container is None:
 137                 MESSAGE( containerName + ".object exists but is not a Container" )
 138         return container
 139
 140     #-------------------------------------------------------------------------
 141
 142     def FindComponent(self,containerName,componentName,listOfMachines):
 143         if containerName!="":
 144             machinesOK=[]
 145             for i in range(len(listOfMachines)):
 146                 currentMachine=listOfMachines[i]
 147                 componentNameForNS= [CosNaming.NameComponent(currentMachine,"dir"),
 148                                      CosNaming.NameComponent(containerName,"dir"),
 149                                      CosNaming.NameComponent(componentName,"object")]
 150                 obj=None
 151                 try:
 152                     obj = self._containerRootContext.resolve(componentNameForNS)
 153                 except CosNaming.NamingContext.NotFound, ex:
 154                     MESSAGE( "component " + componentName + " not found on machine " + currentMachine + " , trying to load" )
 155                     pass
 156                 if obj is not None:
 157                     machinesOK.append(currentMachine)
 158                     pass
 159                 pass
 160             if len(machinesOK)!=0:
 161                 bestMachine=self._contManager.FindBest(machinesOK)
 162                 componentNameForNS= [CosNaming.NameComponent(bestMachine,"dir"),
 163                                      CosNaming.NameComponent(containerName,"dir"),
 164                                      CosNaming.NameComponent(componentName,"object")]
 165                 obj=None
 166                 try:
 167                     obj = self._containerRootContext.resolve(componentNameForNS)
 168                 except:
 169                     pass
 170                 if obj is not None:
 171                     return obj._narrow(Engines.Component)
 172                 else:
 173                     MESSAGE( "Big problem !!!")
 174                     return None
 175             else:
 176                 return None
 177         else:
 178             bestMachine=self._contManager.FindBest(listOfMachines)
 179             MESSAGE("Not implemented yet ...")
 180             return None
 181         pass
 182
 183     #-------------------------------------------------------------------------
 184
 185     def LoadComponent(self,containerName,componentName,listOfMachine):
 186         container=self._contManager.FindOrStartContainer(containerName,listOfMachine)
 187         implementation="lib"+componentName+"Engine.so"
 188         try:
 189             component = container.load_impl(componentName, implementation)
 190             MESSAGE( "component " + component._get_instanceName() + " launched !" )
 191             return component
 192         except:
 193             MESSAGE( "component " + componentName + " NOT launched !" )
 194             return None
 195
 196     #-------------------------------------------------------------------------
 197
 198
 199     def FindOrLoadComponent(self, containerName, componentName):
 200         sp=containerName.split("/")
 201         if len(sp)==1:
 202             listOfMachine=[]
 203             listOfMachine.append(getShortHostName())
 204             comp=self.FindComponent(containerName,componentName,listOfMachine)
 205             if comp is None:
 206                 return self.LoadComponent(containerName,componentName,listOfMachine)
 207             else:
 208                 return comp
 209             pass
 210         else:
 211             params= Engines.MachineParameters(sp[1],sp[0],"LINUX",0,0,0,0)
 212             listOfMachine=self._contManager.GetFittingResources(params,componentName)
 213             ret=self.FindComponent(sp[1],componentName,listOfMachine);
 214             if ret is None:
 215                 return self.LoadComponent(sp[1],componentName,listOfMachine)
 216             else:
 217                 return ret
 218             pass
 219