// @(#)root/proof:$Name:  $:$Id: TProofServ.h,v 1.13 2003/03/04 17:29:29 rdm Exp $
// Author: Fons Rademakers   16/02/97

/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/


#ifndef ROOT_TProofServ
#define ROOT_TProofServ

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// TProofServ                                                           //
//                                                                      //
// TProofServ is the PROOF server. It can act either as the master      //
// server or as a slave server, depending on its startup arguments. It  //
// receives and handles message coming from the client or from the      //
// master server.                                                       //
//                                                                      //
//////////////////////////////////////////////////////////////////////////

#ifndef ROOT_TApplication
#include "TApplication.h"
#endif
#ifndef ROOT_TString
#include "TString.h"
#endif
#ifndef ROOT_Htypes
#include "Htypes.h"
#endif
#ifndef ROOT_TStopwatch
#include "TStopwatch.h"
#endif


class TProof;
class TSocket;
class TList;
class TDSetElement;


class TProofServ : public TApplication {

private:
   TString     fService;          //service we are running, either "proofserv" or "proofslave"
   TString     fUser;             //user as which we run
   TString     fPasswd;           //encoded passwd info for slaves
   TString     fConfDir;          //directory containing cluster config information
   TString     fConfFile;         //file containing config information
   TString     fSessionDir;       //directory containing session dependent files
   TString     fPackageDir;       //directory containing packages and user libs
   TString     fCacheDir;         //directory containing cache of user files
   TString     fPackageLock;      //package dir lock file
   TString     fCacheLock;        //cache dir lock file
   TSocket    *fSocket;           //socket connection to client
   TProof     *fProof;            //PROOF talking to slave servers
   FILE       *fLogFile;          //log file
   TList      *fEnabledPackages;  //list of enabled packages
   Int_t       fPackageLockId;    //file id of package dir lock
   Int_t       fCacheLockId;      //file id of cache dir lock
   Int_t       fProtocol;         //protocol version number
   Int_t       fOrdinal;          //slave ordinal number, -1 for master
   Int_t       fGroupId;          //slave unique id in the active slave group
   Int_t       fGroupSize;        //size of the active slave group
   Int_t       fLogLevel;         //debug logging level
   Bool_t      fMasterServ;       //true if we are a master server
   Int_t       fNcmd;             //command history number
   Bool_t      fInterrupt;        //if true macro execution will be stopped
   Float_t     fRealTime;         //real time spent executing commands
   Float_t     fCpuTime;          //CPU time spent executing commands
   TStopwatch  fLatency;          //measures latency of packet requests
   TStopwatch  fCompute;          //measures time spend processing a packet

   void        Setup();
   void        RedirectOutput();
   Int_t       CatMotd();
   Int_t       LockDir(const TString &lock);
   Int_t       UnlockDir(const TString &lock);
   Int_t       LockCache() { return LockDir(fCacheLock); }
   Int_t       UnlockCache() { return UnlockDir(fCacheLock); }
   Int_t       LockPackage() { return LockDir(fPackageLock); }
   Int_t       UnlockPackage() { return UnlockDir(fPackageLock); }

public:
   TProofServ(int *argc, char **argv);
   virtual ~TProofServ();

   const char   *GetService() const { return fService; }
   const char   *GetConfDir() const { return fConfDir; }
   const char   *GetConfFile() const { return fConfFile; }
   const char   *GetUser() const { return fUser; }
   Int_t         GetProtocol() const { return fProtocol; }
   Int_t         GetOrdinal() const { return fOrdinal; }
   Int_t         GetGroupId() const { return fGroupId; }
   Int_t         GetGroupSize() const { return fGroupSize; }
   Int_t         GetLogLevel() const { return fLogLevel; }
   TSocket      *GetSocket() const { return fSocket; }
   Float_t       GetRealTime() const { return fRealTime; }
   Float_t       GetCpuTime() const { return fCpuTime; }
   void          GetOptions(int *argc, char **argv);

   void          HandleSocketInput();
   void          HandleUrgentData();
   void          HandleSigPipe();
   void          Interrupt() { fInterrupt = kTRUE; }
   Bool_t        IsMaster() const { return fMasterServ; }
   Bool_t        IsParallel() const;

   void          Run(Bool_t retrn = kFALSE);

   void          Print(Option_t *option="") const;

   TObject      *Get(const char *namecycle);
   TDSetElement *GetNextPacket();
   void          Reset(const char *dir);
   Int_t         ReceiveFile(const char *file, Bool_t bin, Long_t size);
   void          SendLogFile(Int_t status = 0);
   void          SendStatus();

   void          Terminate(int status);

   static Bool_t      IsActive();
   static TProofServ *This();

   ClassDef(TProofServ,0)  //PROOF Server Application Interface
};

R__EXTERN TProofServ *gProofServ;

#endif