Go4ThreadManager/TGo4ReplaceException.cxx

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// $Id: TGo4ReplaceException.cxx 478 2009-10-29 12:26:09Z linev $
//-----------------------------------------------------------------------
//       The GSI Online Offline Object Oriented (Go4) Project
//         Experiment Data Processing at EE department, GSI
//-----------------------------------------------------------------------
// Copyright (C) 2000- GSI Helmholtzzentrum für Schwerionenforschung GmbH
//                     Planckstr. 1, 64291 Darmstadt, Germany
// Contact:            http://go4.gsi.de
//-----------------------------------------------------------------------
// This software can be used under the license agreements as stated
// in Go4License.txt file which is part of the distribution.
//-----------------------------------------------------------------------

#include "TGo4ReplaceException.h"

#include "TThread.h"

#include "TGo4Log.h"
#include "TGo4Thread.h"
#include "TGo4ThreadManager.h"
#include "TGo4ThreadHandler.h"
#include "TGo4Runnable.h"

TGo4ReplaceException::TGo4ReplaceException(const TGo4ReplaceException &right)
  :TGo4ThreadException(right)
{
   TRACE((14,"TGo4ReplaceException::TGo4ReplaceException() copy constructor",__LINE__, __FILE__));
   fxNewRunnable=right.fxNewRunnable;
}

TGo4ReplaceException::TGo4ReplaceException (TGo4Runnable* runnable, TGo4Runnable* newrunnable, const char* oldthreadname)
 :TGo4ThreadException(runnable, oldthreadname)
{
   TRACE((14,"TGo4ReplaceException::TGo4ReplaceException(TGo4Runnable*,TGo4Runnable*,const char*) constructor",__LINE__, __FILE__));
   fxDescription= "!!!-- Go4 Replace Exception --!!!";
   if(newrunnable==0)
      {
      TRACE((13,"TGo4ReplaceException constructor -- new runnable same as old runnable",__LINE__, __FILE__));
         fxNewRunnable=(TGo4Runnable*) runnable->Clone(); // deep copy
         *fxNewRunnable=*runnable;   // pointers to manager and thread are not streamed,
                                     // must be handed over by operator= of base class
      }
   else
      {
      TRACE((13,"TGo4ReplaceException constructor -- new runnable specified",__LINE__, __FILE__));
         fxNewRunnable=newrunnable;
      }
}


TGo4ReplaceException::~TGo4ReplaceException()
{
  TRACE((14,"TGo4ReplaceException::~TGo4ReplaceException() destructor",__LINE__, __FILE__));
}


TGo4ReplaceException & TGo4ReplaceException::operator=(const TGo4ReplaceException &right)
{
   TRACE((14,"TGo4ReplaceException::operator=",__LINE__, __FILE__));
   if (&right!=this)
      {
         TRACE((13,"TGo4ReplaceException::operator= processing copy",__LINE__, __FILE__));
         TGo4ThreadException::operator=(right); // copy base class members
         // put additional member copies here...
         fxNewRunnable=right.fxNewRunnable;
         return *this;
      }
   else
      {
         // copy is already source object
         TRACE((13,"TGo4ReplaceException::operator= source and destination objects are identical",__LINE__, __FILE__));
         return *this;
      }
}

Int_t TGo4ReplaceException::Handle ()
{
   TRACE((14,"TGo4ReplaceException::Handle()",__LINE__, __FILE__));
    // first step: find out name of thread to be replaced
   TString name;
   if(GetThreadName()==0)
      // no threadname specified, use name of thread associated with runnable
      {
         TRACE((13,"TGo4ReplaceException::Handle() -- replacing thread associated with runnable",__LINE__, __FILE__));
         name = fxRunnable->GetThread()->GetName();
      }
   else
      // threadname given, use thread handler to cancel
      {
         TRACE((13,"TGo4ReplaceException::Handle() -- replacing thread by specified name",__LINE__, __FILE__));
         name = GetThreadName();
      }

      // second step: remove it
      fxThreadHandler->RemoveThread(name.Data());

    // third step: new thread
    fxThreadHandler->NewThread(name,fxNewRunnable);
    fxThreadHandler->Start(name);

    TThread::CancelPoint();
    return 0;

}

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