TGo4TaskHandlerAbortException.cxx

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// $Id$
//-----------------------------------------------------------------------
//       The GSI Online Offline Object Oriented (Go4) Project
//         Experiment Data Processing at EE department, GSI
//-----------------------------------------------------------------------
// Copyright (C) 2000- GSI Helmholtzzentrum fuer 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 "TGo4TaskHandlerAbortException.h"

#include "TApplication.h"

#include "TGo4Log.h"
#include "TGo4Thread.h"
#include "TGo4Task.h"
#include "TGo4TaskHandler.h"
#include "TGo4TaskHandlerRunnable.h"
#include "TGo4Slave.h"
#include "TGo4ComRemoveClient.h"
#include "TGo4ComDisconnectSlave.h"

TGo4TaskHandlerAbortException::TGo4TaskHandlerAbortException (TGo4TaskHandler *taskhandler)
: TGo4TaskHandlerException(taskhandler)
{
   fxDescription= "!!!-- Go4 TaskHandler Abort Exception --!!!";
}

TGo4TaskHandlerAbortException::TGo4TaskHandlerAbortException(TGo4TaskHandlerRunnable * run)
: TGo4TaskHandlerException(run)
{
   fxDescription= "!!!-- Go4 TaskHandler Abort Exception --!!!";
}

TGo4TaskHandlerAbortException::~TGo4TaskHandlerAbortException()
{
}

Int_t TGo4TaskHandlerAbortException::Handle()
{
   if (fxCaller) {
      // we know the calling thread, stop it!
      fxCaller->GetThread()->Stop();
   } else {
      // no caller specified, continue
   }

   if (fxTaskHandler->IsAborting()) {
      // a concurrent exception is already performing, we do nothing
      TGo4Log::Debug(" TaskHandlerAbortException: taskhandler is already aborting ");
      return 0;
   } else {
      // just go on with the show
      fxTaskHandler->SetAborting(kTRUE);
   } // if (fxTaskHandler->IsAborting())

   if (!fxThreadManager) {
      // error
      fxTaskHandler->SetAborting(kFALSE);
      return -1;
   }

   const char *taskname = fxTaskHandler->GetName();
   TGo4Master *master = nullptr;
   TGo4Slave *slave = nullptr;
   TGo4Task *task = dynamic_cast<TGo4Task *>(fxThreadManager);
   if (task) {
      master = task->GetMaster();
      slave = task->GetSlave();
   }
   if (slave) {
      TGo4Log::Debug(" TaskHandlerAbortException for slave %s ... ", taskname);
      if (slave->IsServer()) {
         // note: we need a local command  here (executed in local thread),
         // since this is running inside thread of taskhandler to be deleted!
         TGo4ComRemoveClient *removecommand = new TGo4ComRemoveClient;
         // removecommand->SetClient("currentclient");
         removecommand->SetClient(taskname);
         removecommand->SetWaitForClient(kFALSE);
         TGo4Log::Debug(" TaskHandlerAbortException on slave server: revoming client %s", taskname);
         task->SubmitCommand(removecommand);
      } else {
         TGo4Log::Debug(" TaskHandlerAbortException: Terminating slave...");
         fxThreadManager->SetBeingQuit(kTRUE); // flag for the application that we expect to be quit soon
         TGo4Log::Debug(" TaskHandlerAbortException set the being quit");
         slave->TerminateFast();
      }
   } else if (master) {
      TGo4Log::Debug(" TaskHandlerAbortException: Removing current slave... ");
      // note: we need a local command here (executed in local thread), since
      // this is running inside thread of taskhandler to be deleted!
      TGo4ComDisconnectSlave *discommand = new TGo4ComDisconnectSlave;
      discommand->SetSlave("currentclient");
      discommand->SetWaitForSlave(kFALSE);
      TGo4Log::Debug(" TaskHandlerAbortException: Disconnecting current slave");
      task->SubmitCommand(discommand);
   } else if (task) {
      // no master, no slave: old style connection, test client and server role
      if (fxTaskHandler->IsClientMode()) {
         // exception was raised by client task handler
         TGo4Log::Debug(" TaskHandlerAbortException: Quit client %s ... ", taskname);
         fxThreadManager->SetBeingQuit(kTRUE); // flag for the application that we expect to be quit soon
         task->TerminateFast();
      } else {
         // exception was raised by server task handler
         TGo4ComRemoveClient *removecommand = new TGo4ComRemoveClient;
         removecommand->SetClient(taskname);
         removecommand->SetWaitForClient(kFALSE);
         TGo4Log::Debug(" TaskHandlerAbortException: Disconnecting client %s ... ", taskname);
         task->SubmitCommand(removecommand);
         // we cannot remove our own thread, so use local command thread
      } // if (fxTaskHandler->IsClientMode())
   } else {
      // no task: something is very wrong!
      gApplication->Terminate();
   }
   return 0;
}