o2::aod::native::RootFile Class Reference

#include <Container.h>

Public Member Functions
	RootFile (std::shared_ptr< ByteSource >)
FileHeader const &	header () const
ByteSource &	source ()
std::shared_ptr< ByteSource > const &	sourcePtr () const
const std::vector< KeyInfo > &	topKeys ()
	All the keys of the top directory, every cycle, in on-disk order.
std::vector< std::string >	dataFrames ()
std::vector< KeyInfo >	keysOf (const std::string &df)
void	setTreesToPrefetch (std::vector< std::string > names)
	The TTrees whose bytes keysOf() fetches along; all of them when empty.
TreeInfo	readTree (const KeyInfo &)
std::map< std::string, std::string >	readStringMap (const std::string &key)
	Empty map if the key does not exist. Read once per key.
std::vector< uint8_t >	readPayload (const KeyInfo &)
	The uncompressed payload of a key.

Detailed Description

The container layer: file header, keys and directories. Only reads what is asked for, so opening a file costs a handful of small reads.

Definition at line 56 of file Container.h.

Constructor & Destructor Documentation

RootFile()

o2::aod::native::RootFile::RootFile ( std::shared_ptr< ByteSource >  source )

explicit

Definition at line 50 of file Container.cxx.

Member Function Documentation

dataFrames()

std::vector< std::string > o2::aod::native::RootFile::dataFrames

(

)

DF_* directory names, deduplicated, ordered numerically, or by parent file path when a parentFiles map exists. Same order as DataInputDirector.

Definition at line 179 of file Container.cxx.

header()

FileHeader const & o2::aod::native::RootFile::header ( ) const

inline

Definition at line 60 of file Container.h.

keysOf()

std::vector< KeyInfo > o2::aod::native::RootFile::keysOf

(

const std::string &

df

)

The keys inside DF df, highest cycle only, read once per DF. Unless the file is mapped, the stored bytes of its TTrees are fetched along, in one read: each read is a round trip for a remote file.

Definition at line 213 of file Container.cxx.

readPayload()

std::vector< uint8_t > o2::aod::native::RootFile::readPayload

(

const KeyInfo &

key

)

The uncompressed payload of a key.

Definition at line 297 of file Container.cxx.

readStringMap()

std::map< std::string, std::string > o2::aod::native::RootFile::readStringMap

(

const std::string &

key

)

Empty map if the key does not exist. Read once per key.

Definition at line 340 of file Container.cxx.

readTree()

TreeInfo o2::aod::native::RootFile::readTree

(

const KeyInfo &

key

)

Definition at line 313 of file Container.cxx.

setTreesToPrefetch()

void o2::aod::native::RootFile::setTreesToPrefetch ( std::vector< std::string >  names )

inline

The TTrees whose bytes keysOf() fetches along; all of them when empty.

Definition at line 73 of file Container.h.

source()

ByteSource & o2::aod::native::RootFile::source ( )

inline

Definition at line 61 of file Container.h.

sourcePtr()

std::shared_ptr< ByteSource > const & o2::aod::native::RootFile::sourcePtr ( ) const

inline

Definition at line 62 of file Container.h.

topKeys()

const std::vector< KeyInfo > & o2::aod::native::RootFile::topKeys

(

)

All the keys of the top directory, every cycle, in on-disk order.

Definition at line 145 of file Container.cxx.

---

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

• /home/runner/work/AliceO2/AliceO2/Framework/AODNative/include/AODNative/Container.h
• /home/runner/work/AliceO2/AliceO2/Framework/AODNative/src/Container.cxx