RootOutputStreamTool.cxx

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
// RootOutputStreamTool.cxx 
// Implementation file for class Athena::RootOutputStreamTool
// Author Peter van Gemmeren <gemmeren@anl.gov>
 
// AthenaRootComps includes
#include "RootOutputStreamTool.h"
#include "RootSvc.h"
#include "RootConnection.h"
#include "RootBranchAddress.h"
 
// Gaudi
#include "GaudiKernel/IConversionSvc.h"
#include "GaudiKernel/IOpaqueAddress.h"
#include "GaudiKernel/IRegistry.h"
#include "GaudiKernel/DataObject.h"
 
// Athena
#include "GaudiKernel/IClassIDSvc.h"
#include "StoreGate/StoreGateSvc.h"
 
// stl
#include <set>
 
namespace Athena {
 
RootOutputStreamTool::RootOutputStreamTool(const std::string& type, const std::string& name, const IInterface* parent) : 
    base_class(type, name, parent),
    m_storeSvc("StoreGateSvc", name),
    m_conversionSvc("Athena::RootCnvSvc/AthenaRootCnvSvc", name),
    m_clidSvc("ClassIDSvc", name) {
  // Properties
  declareProperty("Store", m_storeSvc, "Store from which to stream out event data");
  declareProperty("TreeName", m_treeName = "CollectionTree", "Name of the output event tree");
  declareProperty("OutputFile", m_outputName, "Name of the output file");
}
 
RootOutputStreamTool::~RootOutputStreamTool() {
}
 
StatusCode RootOutputStreamTool::initialize() {
  ATH_MSG_INFO("Initializing " << name());
 
  // Get the ClassID service
  ATH_CHECK(m_clidSvc.retrieve());
  // Get the conversion service
  ATH_CHECK(m_conversionSvc.retrieve());
  return StatusCode::SUCCESS;
}
 
StatusCode RootOutputStreamTool::finalize() {
  // Release the data store service
  if (m_storeSvc != 0) {
    if (!m_storeSvc.release().isSuccess()) {
      ATH_MSG_WARNING("Could not release " << m_storeSvc.type() << " store.");
    }
  }
  // Release the conversion service
  if (!m_conversionSvc.release().isSuccess()) {
    ATH_MSG_WARNING("Cannot release conversion service.");
  }
  // Release the ClassID service
  if (!m_clidSvc.release().isSuccess()) {
    ATH_MSG_WARNING("Cannot release ClassID service.");
  }
  return StatusCode::SUCCESS;
}
 
StatusCode RootOutputStreamTool::connectServices(const std::string& dataStore, const std::string& cnvSvc, bool extendProvenenceRecord) {
  ATH_MSG_VERBOSE("connectServices dataStore = " << dataStore << ", cnvSvc = " << cnvSvc << ", extendProv = " << extendProvenenceRecord);
  // Release the old data store service
  if (m_storeSvc != 0) {
    if (!m_storeSvc.release().isSuccess()) {
      ATH_MSG_WARNING("Could not release " << m_storeSvc.type() << " store.");
    }
  }
  m_storeSvc = ServiceHandle<StoreGateSvc>(dataStore, this->name());
  // Get the data store service
  ATH_CHECK(m_storeSvc.retrieve());
  return StatusCode::SUCCESS;
}
 
StatusCode RootOutputStreamTool::connectOutput(const std::string& outputName) {
  ATH_MSG_VERBOSE("connectOutput outputName = [" << outputName <<"]");
  // Set output file name property
  if (!outputName.empty()) {
    m_outputName = outputName;
  } else {
    return StatusCode::FAILURE;
  }
  // Connect the output file to the service
  if (!m_conversionSvc->connectOutput(m_outputName + "(" + m_treeName + ")", "recreate").isSuccess()) {
    ATH_MSG_ERROR("Unable to connect output " << m_outputName);
    return StatusCode::FAILURE;
  } else {
    ATH_MSG_DEBUG("Connected to " << m_outputName);
  }
  return StatusCode::SUCCESS;
}
 
StatusCode RootOutputStreamTool::commitOutput(bool/* doCommit*/) {
  ATH_MSG_VERBOSE("commitOutput");
  if (m_outputName.empty()) {
    ATH_MSG_ERROR("Unable to commit, no output connected.");
    return StatusCode::FAILURE;
  }
  // Connect the output file to the service
  if (!m_conversionSvc->commitOutput(m_outputName, false).isSuccess()) {
    ATH_MSG_ERROR("Unable to commit output " << m_outputName);
    return StatusCode::FAILURE;
  } else {
    ATH_MSG_DEBUG("Committed: " << m_outputName);
  }
  m_outputName.clear();
  return StatusCode::SUCCESS;
}
 
StatusCode RootOutputStreamTool::finalizeOutput() {
  ATH_MSG_VERBOSE("finalizeOutput");
  return StatusCode::SUCCESS;
}
 
StatusCode RootOutputStreamTool::streamObjects(const IAthenaOutputStreamTool::TypeKeyPairs& typeKeys, const std::string& outputName) {
  ATH_MSG_VERBOSE("streamObjects(type/keys)...");
  // Now iterate over the type/key pairs and stream out each object
  std::vector<DataObject*> dataObjects;
  dataObjects.reserve(typeKeys.size());
  for (IAthenaOutputStreamTool::TypeKeyPairs::const_iterator first = typeKeys.begin(), last = typeKeys.end();
      first != last; ++first) {
    const std::string& type = (*first).first;
    const std::string& key = (*first).second;
    // Find the clid for type name from the classIDSvc
    CLID clid = 0;
    if (!m_clidSvc->getIDOfTypeName(type, clid).isSuccess()) {
      ATH_MSG_ERROR("Could not get clid for typeName " << type);
      return StatusCode::FAILURE;
    }
    DataObject* dObj = 0;
    // Two options: no key or explicit key
    if (key.empty()) {
      ATH_MSG_DEBUG("Get data object with no key");
      // Get DataObject without key
      dObj = m_storeSvc->accessData(clid);
    } else {
      ATH_MSG_DEBUG("Get data object with key");
      // Get DataObjects with key
      dObj = m_storeSvc->accessData(clid, key);
    }
    if (dObj == 0) {
      // No object - print warning and continue with next object
      ATH_MSG_WARNING("No object found for type " << type << " key " << key);
      continue;
    } else {
      ATH_MSG_DEBUG("Found object for type " << type << " key " << key);
    }
    // Save the dObj
    dataObjects.push_back(dObj);
  }
  return this->streamObjects(dataObjects, outputName);
}
 
StatusCode RootOutputStreamTool::streamObjects(const DataObjectVec& dataObjects, const std::string&
 /*outputName*/) {
  ATH_MSG_VERBOSE("streamObjects(dobjs)");
  if (m_outputName.empty()) {
    ATH_MSG_ERROR("Unable to commit, no output connected.");
    return StatusCode::FAILURE;
  }
  ATH_MSG_VERBOSE("streaming out... [" << m_conversionSvc.typeAndName() << "]");
  std::set<DataObject*> written;
  for (std::vector<DataObject*>::const_iterator doIter = dataObjects.begin(), doLast = dataObjects.end();
      doIter != doLast; ++doIter) {
    ATH_MSG_VERBOSE(" --> [" << (*doIter)->clID() << "/" << (*doIter)->name() << "]...");
    // Do not stream out same object twice
    if (written.find(*doIter) != written.end()) {
      // Print warning and skip
      ATH_MSG_DEBUG("Trying to write DataObject twice (clid/key): " << (*doIter)->clID() << ", " << (*doIter)->name());
      ATH_MSG_DEBUG("    Skipping this one.");
    } else {
      written.insert(*doIter);
      // Write object
      IOpaqueAddress* addr = 0;
      if ((m_conversionSvc->createRep(*doIter, addr)).isSuccess()) {
        IRegistry* ireg = (*doIter)->registry();
        // FIXME: that's a wild hack to handle RootBranchAddress's stickyness.
        // if the transient address already has a RootBranchAddress (ie: it was
        // read from a d3pd-file) calling setAddress will invalidate the
        // previous RBA which will screw things up the next time around.
        // The real fix would probably involve changing a bit the logic either
        // in convsvc::createRep above, or -rather- have the side effect of
        // properly setting up the RootConnection (in createRep) be explicitly
        // written somewhere. (here?)
        if (dynamic_cast<RootBranchAddress*>(ireg->address())) {
          delete addr; addr = 0;
        } else {
          ireg->setAddress(addr);
        }
        // SG::DataProxy* proxy = dynamic_cast<SG::DataProxy*>((*doIter)->registry());
        // if (!proxy) {
        //   ATH_MSG_WARNING("Could cast DataObject " 
        //                   << (*doIter)->clID() << " " << (*doIter)->name());
        // }
      } else {
        ATH_MSG_ERROR("Could not create Rep for DataObject (clid/key): " << (*doIter)->clID() << ", " << (*doIter)->name());
        return StatusCode::FAILURE;
      }
    }
  }
  return StatusCode::SUCCESS;
}
 
StatusCode RootOutputStreamTool::getInputItemList(SG::IFolder* /*m_p2BWrittenFromTool*/) {
  ATH_MSG_VERBOSE("getInputItemList");
  return StatusCode::SUCCESS;
}
 
}//> namespace Athena