DataSvcFileEntriesTool Class Reference

Tool to scan a transient store branch that collects all the objects that belong to the same source (file). More...

Inheritance diagram for DataSvcFileEntriesTool:

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Collaboration diagram for DataSvcFileEntriesTool:

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List of all members.

Public Member Functions
	DataSvcFileEntriesTool (const std::string &type, const std::string &name, const IInterface *parent)
	Standard constructor.
virtual	~DataSvcFileEntriesTool ()
	Destructor.
virtual StatusCode	initialize ()
	Initialize the tool.
virtual StatusCode	finalize ()
	Finalize the tool.
virtual const LeavesList &	leaves () const
	Return the list of collected objects.
virtual void	handle (const Incident &incident)
	Call-back function for the BeginEvent incident.
Private Member Functions
void	i_collectLeaves ()
	Scan the data service starting from the node specified as Root.
void	i_collectLeaves (IRegistry *reg)
	Scan the data service starting from the specified node.
IRegistry *	i_getRootNode ()
	Return the pointer to the IRegistry object associated to the node specified as Root.
Private Attributes
std::string	m_dataSvcName
	Variable for the property DataService.
std::string	m_rootNode
	Variable for the property Root.
bool	m_scanOnBeginEvent
	Variable for the property ScanOnBeginEvent.
SmartIF< IIncidentSvc >	m_incidentSvc
	Pointer to the incident service.
SmartIF< IDataManagerSvc >	m_dataMgrSvc
	Pointer to the IDataManagerSvc interface of the data service.
SmartIF< IDataProviderSvc >	m_dataSvc
	Pointer to the IDataProviderSvc interface of the data service.
LeavesList	m_leaves
	Internal cache for the list of objects found during the scan.
std::string	m_initialBase
	File ID of the Root node.
bool	m_ignoreOriginChange
	Variable for the property ScanOnBeginEvent.

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Detailed Description

Tool to scan a transient store branch that collects all the objects that belong to the same source (file).

By default, the list of entries is cached and the cache is cleared at every BeginEvent incident.

Properties:

DataService (string): Name of the data service to use [EventDataSvc]

Root (string): Path to the element from which to start the scan [root of the data service]

ScanOnBeginEvent (bool): If the scan has to be started during the BeginEvent incident (true) or on demand (false, default)

Definition at line 26 of file DataSvcFileEntriesTool.cpp.

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Constructor & Destructor Documentation

DataSvcFileEntriesTool::DataSvcFileEntriesTool	(	const std::string &	type,
		const std::string &	name,
		const IInterface *	parent
	)

Standard constructor.

Definition at line 102 of file DataSvcFileEntriesTool.cpp.

00105                                :
00106    base_class(type, name, parent) {
00107 
00108   declareProperty("DataService", m_dataSvcName = "EventDataSvc",
00109       "Name of the data service to use");
00110 
00111   declareProperty("Root", m_rootNode,
00112       "Path to the element from which to start the scan");
00113 
00114   declareProperty("ScanOnBeginEvent", m_scanOnBeginEvent = false,
00115       "If the scan has to be started during the BeginEvent incident (true) or on demand (false, default)");
00116 
00117   declareProperty("IgnoreOriginChange", m_ignoreOriginChange = false,
00118       "Disable the detection of the change in the origin of object between the BeginEvent and the scan");
}

DataSvcFileEntriesTool::~DataSvcFileEntriesTool

(

)

[virtual]

Destructor.

Definition at line 120 of file DataSvcFileEntriesTool.cpp.

{}

---

Member Function Documentation

StatusCode DataSvcFileEntriesTool::finalize

(

)

[virtual]

Finalize the tool.

Reimplemented from AlgTool.

Definition at line 155 of file DataSvcFileEntriesTool.cpp.

                                           {
  // unregister from the incident service
  if (m_incidentSvc) {
    m_incidentSvc->removeListener(this, IncidentType::BeginEvent);
  }
  // Release the services
  m_incidentSvc.reset();
  m_dataMgrSvc.reset();
  m_dataSvc.reset();

  return AlgTool::finalize();
}

void DataSvcFileEntriesTool::handle

(

const Incident &

incident

)

[virtual]

Call-back function for the BeginEvent incident.

Clears the internal cache, cache the file ID of the Root node and, if the property ScanOnBeginEvent is set to true, scans the data service.

Definition at line 168 of file DataSvcFileEntriesTool.cpp.

                                                            {
  // Get the file id of the root node at every event
  IOpaqueAddress *addr = i_getRootNode()->address();
  if (addr)
    m_initialBase = addr->par()[0];
  else
    m_initialBase.clear(); // use empty file id if there is no address

  m_leaves.clear();
  if (m_scanOnBeginEvent) {
    MsgStream log(msgSvc(), name());
    log << MSG::VERBOSE << "::handle scanning on " << incident.type() << endmsg;
    i_collectLeaves();
  }
}

void DataSvcFileEntriesTool::i_collectLeaves

(

IRegistry *

reg

)

[private]

Scan the data service starting from the specified node.

todo: implement the scanning as an IDataStoreAgent

Definition at line 206 of file DataSvcFileEntriesTool.cpp.

                                                           {
  MsgStream log(msgSvc(), name());
  // I do not put sanity checks on the pointers because I know how I'm calling the function
  IOpaqueAddress *addr = reg->address();
  if (addr) { // we consider only objects that are in a file
    if (outputLevel() <= MSG::VERBOSE)
      log << MSG::VERBOSE << "::i_collectLeaves added " << reg->identifier() << endmsg;
    m_leaves.push_back(reg->object()); // add this object
    // Origin of the current object
    const std::string& base = addr->par()[0];
    // Compare with the origin seen during BeginEvent
    if ( !m_ignoreOriginChange && (m_initialBase != base) )
      throw GaudiException("Origin of data has changed ('"
                           + m_initialBase + "' !=  '" + base
                           + "'), probably OutputStream was called before "
                               "InputCopyStream: check options",
                           name(), StatusCode::FAILURE);

    std::vector<IRegistry*> lfs; // leaves of the current object
    StatusCode sc = m_dataMgrSvc->objectLeaves(reg, lfs);
    if (sc.isSuccess()) {
      for(std::vector<IRegistry*>::iterator i = lfs.begin(); i != lfs.end(); ++i)  {
        // Continue if the leaf has the same database as the parent
        if ( (*i)->address() && (*i)->address()->par()[0] == base )  {
          DataObject* obj = 0;
          sc = m_dataSvc->retrieveObject(reg, (*i)->name(), obj);
          if (sc.isSuccess())  {
            i_collectLeaves(*i);
          } else {
            throw GaudiException("Cannot get " + (*i)->identifier() + " from " + m_dataSvcName, name(), StatusCode::FAILURE);
          }
        }
      }
    }
  }
}

void DataSvcFileEntriesTool::i_collectLeaves

(

)

[private]

Scan the data service starting from the node specified as Root.

Definition at line 201 of file DataSvcFileEntriesTool.cpp.

                                             {
  i_collectLeaves(i_getRootNode());
}

IRegistry * DataSvcFileEntriesTool::i_getRootNode

(

)

[private]

Return the pointer to the IRegistry object associated to the node specified as Root.

Definition at line 191 of file DataSvcFileEntriesTool.cpp.

                                                 {
  DataObject * obj = 0;
  StatusCode sc = m_dataSvc->retrieveObject(m_rootNode, obj);
  if (sc.isFailure()) {
    throw GaudiException("Cannot get " + m_rootNode + " from " + m_dataSvcName, name(), StatusCode::FAILURE);
  }
  return obj->registry();
}

StatusCode DataSvcFileEntriesTool::initialize

(

)

[virtual]

Initialize the tool.

Reimplemented from AlgTool.

Definition at line 122 of file DataSvcFileEntriesTool.cpp.

                                             {
  StatusCode sc = AlgTool::initialize();
  if (sc.isFailure()) return sc;

  // Retrieve the pointer to the needed services.

  m_incidentSvc = serviceLocator()->service("IncidentSvc");
  if ( ! m_incidentSvc ) {
    MsgStream log(msgSvc(), name());
    log << MSG::ERROR << "Cannot get IncidentSvc" << endmsg;
    return StatusCode::FAILURE;
  }

  m_dataMgrSvc = m_dataSvc = serviceLocator()->service(m_dataSvcName);
  if ( ! m_dataSvc || ! m_dataMgrSvc ) {
    MsgStream log(msgSvc(), name());
    log << MSG::ERROR << "Cannot get IDataProviderSvc+IDataManagerSvc " << m_dataSvcName << endmsg;
    return StatusCode::FAILURE;
  }

  // Register ourself to the incident service as listener for BeginEvent
  m_incidentSvc->addListener(this, IncidentType::BeginEvent);

  // If the Root node is not specified, take the name from the data service itself.
  if (m_rootNode.empty()) {
    m_rootNode = m_dataMgrSvc->rootName();
  }

  // Clear the cache (in case the instance is re-initilized).
  m_leaves.clear();
  return StatusCode::SUCCESS;
}

const IDataStoreLeaves::LeavesList & DataSvcFileEntriesTool::leaves

(

)

const [virtual]

Return the list of collected objects.

If the scan was not yet done since the last BeginEvent incident, it is done when calling this function. The result of the scan is cached.

Definition at line 184 of file DataSvcFileEntriesTool.cpp.

                                                                        {
  if (m_leaves.empty()) {
    const_cast<DataSvcFileEntriesTool*>(this)->i_collectLeaves();
  }
  return m_leaves;
}

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Member Data Documentation

SmartIF<IDataManagerSvc> DataSvcFileEntriesTool::m_dataMgrSvc [private]

Pointer to the IDataManagerSvc interface of the data service.

Definition at line 65 of file DataSvcFileEntriesTool.cpp.

SmartIF<IDataProviderSvc> DataSvcFileEntriesTool::m_dataSvc [private]

Pointer to the IDataProviderSvc interface of the data service.

Definition at line 67 of file DataSvcFileEntriesTool.cpp.

std::string DataSvcFileEntriesTool::m_dataSvcName [private]

Variable for the property DataService.

Definition at line 56 of file DataSvcFileEntriesTool.cpp.

bool DataSvcFileEntriesTool::m_ignoreOriginChange [private]

Variable for the property ScanOnBeginEvent.

Definition at line 88 of file DataSvcFileEntriesTool.cpp.

SmartIF<IIncidentSvc> DataSvcFileEntriesTool::m_incidentSvc [private]

Pointer to the incident service.

Definition at line 63 of file DataSvcFileEntriesTool.cpp.

std::string DataSvcFileEntriesTool::m_initialBase [private]

File ID of the Root node.

It is cached every BeginEvent to be compared with the one seen during the collection of the leaves, to avoid that the collection is altered by previous calls to an OutputStream.

Definition at line 85 of file DataSvcFileEntriesTool.cpp.

LeavesList DataSvcFileEntriesTool::m_leaves [private]

Internal cache for the list of objects found during the scan.

Definition at line 70 of file DataSvcFileEntriesTool.cpp.

std::string DataSvcFileEntriesTool::m_rootNode [private]

Variable for the property Root.

Definition at line 58 of file DataSvcFileEntriesTool.cpp.

bool DataSvcFileEntriesTool::m_scanOnBeginEvent [private]

Variable for the property ScanOnBeginEvent.

Definition at line 60 of file DataSvcFileEntriesTool.cpp.

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The documentation for this class was generated from the following file:

• /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v22r0/GaudiSvc/src/PersistencySvc/DataSvcFileEntriesTool.cpp