--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/connectors/PYRO/__init__.py	Wed Aug 20 00:11:40 2008 +0200
@@ -0,0 +1,106 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
+#
+#See COPYING file for copyrights details.
+#
+#This library is free software; you can redistribute it and/or
+#modify it under the terms of the GNU General Public
+#License as published by the Free Software Foundation; either
+#version 2.1 of the License, or (at your option) any later version.
+#
+#This library is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+#General Public License for more details.
+#
+#You should have received a copy of the GNU General Public
+#License along with this library; if not, write to the Free Software
+#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+import Pyro.core as pyro
+from Pyro.errors import PyroError
+import traceback
+from time import sleep
+
+def PYRO_connector_factory(uri, pluginsroot):
+    """
+    This returns the connector to Pyro style PLCobject
+    """
+    pluginsroot.logger.write("Connecting to URI : %s\n"%uri)
+
+    servicetype, location = uri.split("://")
+    
+    # Try to get the proxy object
+    try :
+        RemotePLCObjectProxy = pyro.getAttrProxyForURI("PYROLOC://"+location+"/PLCObject")
+    except Exception, msg:
+        pluginsroot.logger.write_error("Wrong URI, please check it !\n")
+        pluginsroot.logger.write_error(traceback.format_exc())
+        return None
+
+    def PyroCatcher(func, default=None):
+        """
+        A function that catch a pyro exceptions, write error to logger
+        and return defaul value when it happen
+        """
+        def cather_func(*args,**kwargs):
+            try:
+                return func(*args,**kwargs)
+            except PyroError,e:
+                #pluginsroot.logger.write_error(traceback.format_exc())
+                pluginsroot.logger.write_error(str(e))
+                pluginsroot._Disconnect()
+                return default
+        return cather_func
+
+    # Check connection is effective. 
+    # lambda is for getattr of GetPLCstatus to happen inside catcher
+    if PyroCatcher(lambda:RemotePLCObjectProxy.GetPLCstatus())() == None:
+        pluginsroot.logger.write_error("Cannot get PLC status - connection failed.\n")
+        return None
+        
+    class PyroProxyProxy:
+        """
+        A proxy proxy class to handle Beremiz Pyro interface specific behavior.
+        And to put pyro exception catcher in between caller and pyro proxy
+        """
+        def GetPyroProxy(self):
+            """
+            This func returns the real Pyro Proxy.
+            Use this if you musn't keep reference to it.
+            """
+            return RemotePLCObjectProxy
+        
+        def __getattr__(self, attrName):
+            if not self.__dict__.has_key(attrName):
+                if attrName=="StartPLC":
+                    def _StartPLC():
+                        """
+                        pluginsroot._connector.GetPyroProxy() is used 
+                        rather than RemotePLCObjectProxy because
+                        object is recreated meanwhile, 
+                        so we must not keep ref to it here
+                        """
+                        if pluginsroot._connector.GetPyroProxy().GetPLCstatus() == "Dirty":
+                            """
+                            Some bad libs with static symbols may polute PLC
+                            ask runtime to suicide and come back again
+                            """
+                            pluginsroot.logger.write("Force runtime reload\n")
+                            pluginsroot._connector.GetPyroProxy().ForceReload()
+                            pluginsroot._Disconnect()
+                            # let remote PLC time to resurect.(freeze app)
+                            sleep(0.5)
+                            pluginsroot._Connect()
+                        return pluginsroot._connector.GetPyroProxy().StartPLC()
+                    member = PyroCatcher(_StartPLC, False)
+                else:
+                    def my_local_func(*args,**kwargs):
+                        return RemotePLCObjectProxy.__getattr__(attrName)(*args,**kwargs)
+                    member = PyroCatcher(my_local_func, None)
+                self.__dict__[attrName] = member
+            return self.__dict__[attrName]
+    return PyroProxyProxy()
+    
+