xAODMerge.cxx File Reference

#include <cstring>
#include <vector>
#include <cstdlib>
#include <TError.h>
#include "xAODRootAccess/tools/TFileMerger.h"
#include "xAODRootAccess/tools/Message.h"
#include "xAODRootAccess/Init.h"

Include dependency graph for xAODMerge.cxx:

Go to the source code of this file.

Macros
#define	R_CHECK(EXP)
	Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration.

Functions
int	main (int argc, char *argv[])

Macro Definition Documentation

R_CHECK

#define R_CHECK

(

EXP

)

Value:

   do {                                                                 \
      if( ! EXP.isSuccess() ) {                                         \
         ::Error( APP_NAME, XAOD_MESSAGE( "Failed to execute \"%s\"" ), \
                  #EXP );                                               \
         return 1;                                                      \
      }                                                                 \
   } while( 0 )

Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration.

Executable replacing "hadd" for merging xAOD files in standalone mode

This executable can be used outside of Athena to conveniently merge xAOD files into a single output file. It is mainly meant to be used for merging files on the grid, or on PROOF. But it can also be used for other simple merging operations.

Author

Attila Krasznahorkay Attil.nosp@m.a.Kr.nosp@m.aszna.nosp@m.hork.nosp@m.ay@ce.nosp@m.rn.c.nosp@m.h Helper macro to return proper error codes when failing

Definition at line 27 of file xAODMerge.cxx.

#define R_CHECK( EXP )                                                  \
   do {                                                                 \
      if( ! EXP.isSuccess() ) {                                         \
         ::Error( APP_NAME, XAOD_MESSAGE( "Failed to execute \"%s\"" ), \
                  #EXP );                                               \
         return 1;                                                      \
      }                                                                 \
   } while( 0 )

Function Documentation

main()

int main	(	int	argc,
		char *	argv[] )

Definition at line 36 of file xAODMerge.cxx.

                                   {
 
   // The name of the application:
   const char* APP_NAME = argv[ 0 ];
 
   // Provide usage instructions if not enough options were given:
   if( ( argc < 3 ) ||
       ( ! strcmp( argv[ 1 ], "-h" ) ) ||
       ( ! strcmp( argv[ 1 ], "--help" ) ) ) {
      ::Info( APP_NAME, " " );
      ::Info( APP_NAME, "Usage: %s [options] outputFile inputFile1 "
              "[inputFile2 ...]",
              APP_NAME );
      ::Info( APP_NAME, " " );
      ::Info( APP_NAME, "  Options:" );
      ::Info( APP_NAME, "    -s Use slow xAOD tree merging" );
      ::Info( APP_NAME, "    -b Use branch-access for slow and metadata "
              "merging" );
      ::Info( APP_NAME, "    -v NUMBER Use a specific verbosity setting" );
      ::Info( APP_NAME, "    -m Metadata tool type to use during the merge" );
      ::Info( APP_NAME, "    -e NUMBER Number of events to merge in slow "
              "merging mode" );
      ::Info( APP_NAME, " " );
      return 1;
   }
 
   // Initialise the environment:
   R_CHECK( xAOD::Init( APP_NAME ) );
 
   // Decode the command line options:
   bool useSlowMerge = false;
   xAOD::TEvent::EAuxMode mode = xAOD::TEvent::kClassAccess;
   const char* outputName = 0;
   std::vector< const char* > inputNames;
   int verbosity = 0;
   std::vector< const char* > metaDataTools;
   ::Long64_t entries = xAOD::TFileMerger::kBigNumber;
   for( int i = 1; i < argc; ++i ) {
      if( ! strcmp( argv[ i ], "-s" ) ) {
         useSlowMerge = true;
      } else if( ! strcmp( argv[ i ], "-b" ) ) {
         mode = xAOD::TEvent::kBranchAccess;
      } else if( ! strcmp( argv[ i ], "-v" ) ) {
         if( i + 1 >= argc ) {
            ::Error( APP_NAME, "No verbosity level was provided after -v" );
         } else {
            const long request = strtol( argv[ i + 1 ], 0, 10 );
            if( ( request < kMaxLong ) && ( request >= 0 ) ) {
               verbosity = static_cast< int >( request );
               ++i;
            } else {
               ::Error( APP_NAME, "Could not parse the verbosity level passed "
                        "after -v: %s", argv[ i + 1 ] );
               ::Error( APP_NAME, "Will use the default value (0)" );
            }
         }
      } else if( ! strcmp( argv[ i ], "-m" ) ) {
         if( i + 1 >= argc ) {
            ::Error( APP_NAME, "No tool type name provided after -m" );
         } else {
            metaDataTools.push_back( argv[ i + 1 ] );
            ++i;
         }
      } else if( ! strcmp( argv[ i ], "-e" ) ) {
         if( i + 1 >= argc ) {
            ::Error( APP_NAME, "No verbosity level was provided after -e" );
         } else {
            const long request = strtol( argv[ i + 1 ], 0, 10 );
            if( ( request < kMaxLong ) && ( request >= 0 ) ) {
               entries = static_cast< ::Long64_t >( request );
               ++i;
            } else {
               ::Error( APP_NAME, "Could not parse the number of entries "
                        "passed after -e: %s", argv[ i + 1 ] );
               ::Error( APP_NAME, "Will use the default value (%i)",
                        static_cast< int >( xAOD::TFileMerger::kBigNumber ) );
            }
         }
      } else if( ! outputName ) {
         outputName = argv[ i ];
      } else {
         inputNames.push_back( argv[ i ] );
      }
   }
 
   if( ! outputName ) {
     ::Error( APP_NAME, "No output name provided." );
     return 1;
   }
 
   // Set up the file merger object:
   xAOD::TFileMerger merger;
   merger.setAccessMode( mode );
   merger.setVerbosity( verbosity );
   R_CHECK( merger.setOutputFileName( outputName ) );
   for( auto name : inputNames ) {
      R_CHECK( merger.addFile( name ) );
   }
   for( auto typeName : metaDataTools ) {
      R_CHECK( merger.addMetaDataTool( typeName ) );
   }
 
   // Execute the merge:
   R_CHECK( merger.merge( useSlowMerge ? xAOD::TFileMerger::kSlowMerge :
                          xAOD::TFileMerger::kFastMerge, entries ) );
 
   return 0;
}