Collection (and CollectionProxy) implementation based on ROOT trees. More...

#include <RootCollection.h>

Inheritance diagram for pool::RootCollection::RootCollection:

Collaboration diagram for pool::RootCollection::RootCollection:

Public Types
typedef Gaudi::PluginService::Factory< ICollection (const ICollectionDescription , ICollection::OpenMode, ISession *)>	Factory

enum	OpenMode { CREATE, CREATE_AND_OVERWRITE, UPDATE, READ }
	Enumeration of the possible open modes of the collection. More...

Public Member Functions
	RootCollection (const pool::ICollectionDescription description, pool::ICollection::OpenMode mode, pool::ISession )
	Constructor. More...

	~RootCollection ()
	Destructor. More...

virtual void	addTreeBranch (const std::string &name, const std::string &type_name)

virtual ICollection::OpenMode	openMode () const final override
	Return openMode. More...

virtual void	open () final override
	Explicitly re-opens the collection after it has been closed. More...

virtual bool	isOpen () const final override
	Checks if the collection is open. More...

virtual void	insertRow (const pool::CollectionRowBuffer &inputRowBuffer) final override
	Adds a new row of data to the collection. More...

virtual void	commit (bool restartTransaction=false) final override
	Commits the last changes made to the collection. More...

virtual void	close () final override
	Explicitly closes the collection. More...

virtual const ICollectionDescription &	description () const final override
	Returns an object used to describe the collection properties. More...

virtual ICollectionQuery *	newQuery () final override
	Returns an object used to query the collection. More...

virtual void	initNewRow (pool::CollectionRowBuffer &row) const
	Initialize a new RowBuffer by adding all Attributes adn Tokens of this collection to it. More...

Static Public Attributes
static const unsigned int	c_maxLengthOfStrings = 5000

static const char *const	poolOptToRootOpt []

static const Io::IoFlags	poolOptToFileMgrOpt []

static const char *const	c_tokenBranchName

static const char *const	c_attributeListLayoutName

Private Member Functions
	RootCollection (const RootCollection &)
	copying unimplemented in this class. More...

RootCollection &	operator= (const RootCollection &)
	copying unimplemented in this class. More...

void	delayedFileOpen (const std::string &method)

TTree *	getCollectionTree ()

void	setupTree () const

void	readAttributeListSpecification () const

void	writeAttributeListSpecification ()

bool	fileCatalogRequired () const

std::string	retrievePFN () const

std::string	retrieveFID ()

std::string	retrieveUniquePFN (const FileCatalog::FileID &fid)

std::string	retrieveBestPFN (const FileCatalog::FileID &fid) const

void	retrieveFileCatalog () const

void	cleanup ()

Private Attributes
CollectionDescription	m_description

std::string	m_name

std::string	m_fileName

ICollection::OpenMode	m_mode

TTree *	m_tree

TFile *	m_file

ISession *	m_session

bool	m_open

bool	m_readOnly

bool	m_schemaWritten

std::unique_ptr< pool::IFileCatalog >	m_fileCatalog

coral::MessageStream	m_poolOut

SmartIF< IFileMgr >	m_fileMgr

Detailed Description

Collection (and CollectionProxy) implementation based on ROOT trees.

Implementation details:

Token and meta data attributes are stored in a simple TTree
Tokens are stored as (compressed) C-string
Each attribute is written to a separate branch of the TTree
You can "play" with the collection tree in an interactive ROOT session
The TTree is stored to the ROOT file: collectionName.root
Pool FileCatalog can be utilized to locate/register the collection files (see: RootCollection::RootCollection)
Selection is performed using TTreePlayer
Description of query syntax can be found at http://root.cern.ch/root/htmldoc/TTree.html#TTree:Draw
It is possible to read only subsets of the AttributeList
This feature is controlled via the "option" parameter of the RootCollection::select method
e.g. RootCollection::select( primaryQuery, secondaryQuery ,"ATTRIBUTE_LIST attribute23 attribute42")
Support for remote collection access via rootd
(experimental)
Support for a simple server side selection
(experimental)

ROOT documentation can be found at http://root.cern.ch/

Definition at line 60 of file RootCollection.h.

Member Typedef Documentation

◆ Factory

typedef Gaudi::PluginService::Factory<ICollection*( const ICollectionDescription*, ICollection::OpenMode, ISession*)> pool::RootCollection::RootCollection::Factory

Definition at line 63 of file RootCollection.h.

Member Enumeration Documentation

◆ OpenMode

enum pool::ICollection::OpenMode

inherited

Enumeration of the possible open modes of the collection.

Enumerator
CREATE
CREATE_AND_OVERWRITE
UPDATE
READ

Definition at line 26 of file ICollection.h.

26 { CREATE, CREATE_AND_OVERWRITE, UPDATE, READ } OpenMode;

Constructor & Destructor Documentation

◆ RootCollection() [1/2]

pool::RootCollection::RootCollection::RootCollection	(	const pool::ICollectionDescription *	description,
		pool::ICollection::OpenMode	mode,
		pool::ISession *
	)

Constructor.

Parameters

session	If you want to access the referenced objects you have to provide an ISession
connection	The location of the collection file is uniquely defined by the parameters name and connection
name	The location of the collection file is uniquely defined by the parameters name and connection
mode	The open mode of the collection

Without use of FileCatalog:
- The path to the collection file is simply created by the following concatenation:
  connection+name+".root"
- name: Name of the collection file
- connection:
  - It can be a relative or absolute path
  - In case of an empty connection string it is assumed that the file is located in the current directory
  - Remote access via rootd: e.g. "root://pcepsft02.cern.ch:9090//localdisk/
    Further documentation can be found in the class description of TNetFile (http://root.cern.ch/root/html/TNetFile.html)

Utilization of FileCatalog:
- This mode is triggered if the name parameter starts with one of the following prefixes "PFN:", "FID:" or "LFN:".
- According to the prefix the name is interpreted as Physical File Name, unique File ID or Logical File Name
- The connection string is interpreted as URI of the FileCatalog. The collection retrieves the FileCatalog defined by the given URI from FileCatalogMap. A default file catalog (empty connection string) can be defined there.
- This mode works also in the context of MultiCollection. If a collection created by a MultiCollection iterator is a RootCollection using FileCatalog, it will use the same catalog as its multi collection parent. On the other side the connection string defining the FileCatalog of a RootCollection is ignored when a RootCollection using FileCatalogs is added to a MultiCollection

◆ ~RootCollection()

pool::RootCollection::RootCollection::~RootCollection ( )

Destructor.

◆ RootCollection() [2/2]

pool::RootCollection::RootCollection::RootCollection ( const RootCollection & )

private

copying unimplemented in this class.

Member Function Documentation

◆ addTreeBranch()

virtual void pool::RootCollection::RootCollection::addTreeBranch	(	const std::string &	name,
		const std::string &	type_name
	)

virtual

◆ cleanup()

void pool::RootCollection::RootCollection::cleanup ( )

private

◆ close()

virtual void pool::RootCollection::RootCollection::close ( )

finaloverridevirtual

Explicitly closes the collection.

Implements pool::ICollection.

◆ commit()

virtual void pool::RootCollection::RootCollection::commit ( bool restartTransaction = false )

finaloverridevirtual

Commits the last changes made to the collection.

Implements pool::ICollection.

◆ delayedFileOpen()

void pool::RootCollection::RootCollection::delayedFileOpen ( const std::string & method )

private

◆ description()

virtual const ICollectionDescription& pool::RootCollection::RootCollection::description ( ) const

finaloverridevirtual

Returns an object used to describe the collection properties.

Implements pool::ICollection.

◆ fileCatalogRequired()

bool pool::RootCollection::RootCollection::fileCatalogRequired ( ) const

private

◆ getCollectionTree()

TTree* pool::RootCollection::RootCollection::getCollectionTree ( )

private

◆ initNewRow()

virtual void pool::ICollection::initNewRow ( pool::CollectionRowBuffer & row ) const

virtualinherited

Initialize a new RowBuffer by adding all Attributes adn Tokens of this collection to it.

◆ insertRow()

virtual void pool::RootCollection::RootCollection::insertRow ( const pool::CollectionRowBuffer & inputRowBuffer )

finaloverridevirtual

Adds a new row of data to the collection.

Implements pool::ICollection.

◆ isOpen()

virtual bool pool::RootCollection::RootCollection::isOpen ( ) const

finaloverridevirtual

Checks if the collection is open.

Implements pool::ICollection.

◆ newQuery()

virtual ICollectionQuery* pool::RootCollection::RootCollection::newQuery ( )

finaloverridevirtual

Returns an object used to query the collection.

Implements pool::ICollection.

◆ open()

virtual void pool::RootCollection::RootCollection::open ( )

finaloverridevirtual

Explicitly re-opens the collection after it has been closed.

Implements pool::ICollection.

◆ openMode()

virtual ICollection::OpenMode pool::RootCollection::RootCollection::openMode ( ) const

finaloverridevirtual

Return openMode.

Implements pool::ICollection.

◆ operator=()

RootCollection& pool::RootCollection::RootCollection::operator= ( const RootCollection & )

private

copying unimplemented in this class.

◆ readAttributeListSpecification()

void pool::RootCollection::RootCollection::readAttributeListSpecification ( ) const

private

◆ retrieveBestPFN()

std::string pool::RootCollection::RootCollection::retrieveBestPFN ( const FileCatalog::FileID & fid ) const

private

◆ retrieveFID()

std::string pool::RootCollection::RootCollection::retrieveFID ( )

private

◆ retrieveFileCatalog()

void pool::RootCollection::RootCollection::retrieveFileCatalog ( ) const

private

◆ retrievePFN()

std::string pool::RootCollection::RootCollection::retrievePFN ( ) const

private

◆ retrieveUniquePFN()

std::string pool::RootCollection::RootCollection::retrieveUniquePFN ( const FileCatalog::FileID & fid )

private

◆ setupTree()

void pool::RootCollection::RootCollection::setupTree ( ) const

private

◆ writeAttributeListSpecification()

void pool::RootCollection::RootCollection::writeAttributeListSpecification ( )

private

Member Data Documentation

◆ c_attributeListLayoutName

const char* const pool::RootCollection::RootCollection::c_attributeListLayoutName

static

Definition at line 163 of file RootCollection.h.

◆ c_maxLengthOfStrings

const unsigned int pool::RootCollection::RootCollection::c_maxLengthOfStrings = 5000

static

Definition at line 159 of file RootCollection.h.

◆ c_tokenBranchName

const char* const pool::RootCollection::RootCollection::c_tokenBranchName

static

Definition at line 162 of file RootCollection.h.

◆ m_description

CollectionDescription pool::RootCollection::RootCollection::m_description

private

Definition at line 167 of file RootCollection.h.

◆ m_file

TFile* pool::RootCollection::RootCollection::m_file

private

Definition at line 173 of file RootCollection.h.

◆ m_fileCatalog

std::unique_ptr<pool::IFileCatalog> pool::RootCollection::RootCollection::m_fileCatalog

private

Definition at line 179 of file RootCollection.h.

◆ m_fileMgr

SmartIF<IFileMgr> pool::RootCollection::RootCollection::m_fileMgr

private

Definition at line 182 of file RootCollection.h.

◆ m_fileName

std::string pool::RootCollection::RootCollection::m_fileName

private

Definition at line 170 of file RootCollection.h.

◆ m_mode

ICollection::OpenMode pool::RootCollection::RootCollection::m_mode

private

Definition at line 171 of file RootCollection.h.

◆ m_name

std::string pool::RootCollection::RootCollection::m_name

private

Definition at line 169 of file RootCollection.h.

◆ m_open

bool pool::RootCollection::RootCollection::m_open

private

Definition at line 175 of file RootCollection.h.

◆ m_poolOut

coral::MessageStream pool::RootCollection::RootCollection::m_poolOut

private

Definition at line 180 of file RootCollection.h.

◆ m_readOnly

bool pool::RootCollection::RootCollection::m_readOnly

private

Definition at line 176 of file RootCollection.h.

◆ m_schemaWritten

bool pool::RootCollection::RootCollection::m_schemaWritten

private

Definition at line 177 of file RootCollection.h.

◆ m_session

ISession* pool::RootCollection::RootCollection::m_session

private

Definition at line 174 of file RootCollection.h.

◆ m_tree

TTree* pool::RootCollection::RootCollection::m_tree

private

Definition at line 172 of file RootCollection.h.

◆ poolOptToFileMgrOpt

const Io::IoFlags pool::RootCollection::RootCollection::poolOptToFileMgrOpt[]

static

Definition at line 161 of file RootCollection.h.

◆ poolOptToRootOpt

const char* const pool::RootCollection::RootCollection::poolOptToRootOpt[]

static

Definition at line 160 of file RootCollection.h.

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

RootCollection.h

Public Types

Public Member Functions

Static Public Attributes

Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ Factory

Member Enumeration Documentation

◆ OpenMode

Constructor & Destructor Documentation

◆ RootCollection() [1/2]

◆ ~RootCollection()

◆ RootCollection() [2/2]

Member Function Documentation

◆ addTreeBranch()

◆ cleanup()

◆ close()

◆ commit()

◆ delayedFileOpen()

◆ description()

◆ fileCatalogRequired()

◆ getCollectionTree()

◆ initNewRow()

◆ insertRow()

◆ isOpen()

◆ newQuery()

◆ open()

◆ openMode()

◆ operator=()

◆ readAttributeListSpecification()

◆ retrieveBestPFN()

◆ retrieveFID()

◆ retrieveFileCatalog()

◆ retrievePFN()

◆ retrieveUniquePFN()

◆ setupTree()

◆ writeAttributeListSpecification()

Member Data Documentation

◆ c_attributeListLayoutName

◆ c_maxLengthOfStrings

◆ c_tokenBranchName

◆ m_description

◆ m_file

◆ m_fileCatalog

◆ m_fileMgr

◆ m_fileName

◆ m_mode

◆ m_name

◆ m_open

◆ m_poolOut

◆ m_readOnly

◆ m_schemaWritten

◆ m_session

◆ m_tree

◆ poolOptToFileMgrOpt

◆ poolOptToRootOpt