RecordDataSvc.cpp

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//====================================================================
//  RecordDataSvc.cpp
//--------------------------------------------------------------------
//
//  Package    : System ( The LHCb Offline System)
//
//  Description: implementation of the Transient event data service.
//
//  Author     : M.Frank
//  History    :
// +---------+----------------------------------------------+---------
// |    Date |                 Comment                      | Who
// +---------+----------------------------------------------+---------
// | 10/12/08| Initial version                              | MF
// +---------+----------------------------------------------+---------
//
//====================================================================
#define  DATASVC_RECORDDATASVC_CPP

#include "GaudiKernel/SmartIF.h"
#include "GaudiKernel/IProperty.h"
#include "GaudiKernel/DataObject.h"
#include "GaudiKernel/ISvcLocator.h"
#include "GaudiKernel/IIncidentSvc.h"
#include "GaudiKernel/IConversionSvc.h"
#include "GaudiKernel/IOpaqueAddress.h"
#include "GaudiKernel/DataIncident.h"
#include "GaudiKernel/RegistryEntry.h"

#include "RecordDataSvc.h"
using namespace std;

// Instantiation of a static factory class used by clients to create
// instances of this service
DECLARE_COMPONENT(RecordDataSvc)

StatusCode RecordDataSvc::initialize()    {
  // Nothing to do: just call base class initialisation
  StatusCode      sc  = DataSvc::initialize();

  if ( !sc.isSuccess() ) { // Base class failure
    return sc;
  }
  // Attach data loader facility
  m_cnvSvc = service(m_persSvcName, true);
  if ( !m_cnvSvc) {
    error() << "Failed to access RecordPersistencySvc." << endmsg;
    return StatusCode::FAILURE;
  }
  auto prp = m_cnvSvc.as<IProperty>();
  if ( prp ) {
    //prp->setProperty();
  }
  sc = setDataLoader( m_cnvSvc.get() );
  if ( !sc.isSuccess() ) {
    error() << "Failed to attach dataloader RecordPersistencySvc." << endmsg;
    return sc;
  }

  sc = setRoot(m_rootName, new DataObject());
  if( !sc.isSuccess() )  {
    warning() << "Error declaring Record root DataObject" << endmsg;
    return sc;
  }

  if( !m_incidentSvc )  {
    fatal() << "IncidentSvc is invalid--base class failed." << endmsg;
    return sc;
  }

  m_incidentSvc->addListener(this,"FILE_OPEN_READ");
  m_incidentSvc->addListener(this,m_saveIncidentName);
  return sc;
}

StatusCode RecordDataSvc::finalize()    {
  if( m_incidentSvc ) m_incidentSvc->removeListener(this);
  m_cnvSvc.reset();
  DataSvc::finalize().ignore();
  return StatusCode::SUCCESS ;
}

void RecordDataSvc::handle(const Incident& incident) {
  if ( incident.type() == "FILE_OPEN_READ" ) {
    typedef ContextIncident<IOpaqueAddress*> Ctxt;
    auto inc = dynamic_cast<const Ctxt*>(&incident);
    if ( !inc )  {
        always() << "Received invalid incident of type:" << incident.type() << endmsg;
    } else {
      registerRecord(inc->source(),inc->tag());
      if ( !m_incidentName.empty() ) {
        auto  incidents = m_incidents;
        m_incidents.clear();
        for( const auto& i : incidents)
            m_incidentSvc->fireIncident(Incident{i,m_incidentName});
      }
    }
  } else if ( incident.type() == m_saveIncidentName ) {
    always() << "Saving records not implemented." << endmsg;
  }
}

void RecordDataSvc::loadRecords(IRegistry* pObj) {
  if ( !pObj )    {
      error() << "Failed to load records object: " << pObj->identifier() << endmsg;
  } else {
    vector<IRegistry*> leaves;
    DataObject* p = nullptr;
    const string& id0 = pObj->identifier();
    StatusCode sc = retrieveObject(id0, p);
    if ( sc.isSuccess() ) {
      debug() << "Loaded records object: " << id0 << endmsg;
      sc = objectLeaves(pObj, leaves);
      if ( sc.isSuccess() )  {
        for ( const auto& i : leaves) loadRecords(i);
      }
    }
  }
}

void RecordDataSvc::registerRecord(const string& data, IOpaqueAddress* pAddr)   {
  if ( !data.empty() && pAddr ) {
    string fid = data;
    debug() << "Request to load record for file " << fid << endmsg;
    StatusCode sc = registerAddress(m_root,fid,pAddr);
    if ( !sc.isSuccess() ) {
      warning() << "Failed to register record for:" << fid << endmsg;
      pAddr->release();
      return;
    }
    if ( m_autoLoad ) {
      loadRecords(pAddr->registry());
    }
    m_incidents.push_back(pAddr->registry()->identifier());
  }
  else if ( !data.empty() && !pAddr ) {
    info() << "Failed to register record for:" << data << " [Invalid Address]" << endmsg;
  }
}

RecordDataSvc::RecordDataSvc(const string& name,ISvcLocator* svc)
: base_class(name,svc)
{
  m_rootName = "/Records";
}