AIDA Tuple ServiceAIDA Tuple Service

Manuel Domenech

Wednesday 26-10-2005

Main ideaMain idea

Substitute for the current NTuple Service Follows the AIDA specification Easy to maintain:

Few code in GaudiSvc package Main part outside (PI project)

Well documented

Contents of Contents of AIDATupleSvc (I)AIDATupleSvc (I)

AIDATupleSvc.h / .cpp Inherits from DataSvc Common tasks (connect, book, find, register,

unregister…) Interface to PI Stores Support for ROOT, POOL, HBOOK and XML persistency POOL persistency the most interesting for Gaudi

Contents of Contents of AIDATupleSvc (II)AIDATupleSvc (II)

AIDATuple.h / .cpp Inherits from DataObject to make it storable Holds a normal pi_aida::Tuple and a pi_aida::Filter Can store:

Basic data types User-defined objects (Dictionary needed) POOL Tokens (POOL persistency) IOpaqueAddresses (Event Tag Collections)

Contents of Contents of AIDATupleSvc (III)AIDATupleSvc (III)

AIDAEvtCollSelector.h / .cpp Choosing names is not my best Inherits from IEvtSelector Still not ready (hopefully this Friday) Access to original events from IOpaqueAddress stored

in normal tuples

How to use it (Overview)How to use it (Overview)

Examples in the GaudiExamples package AIDATuple folder

First versions: basic usage AIDATupleAlgorithRead and AIDATupleAlgorithWrite

Last version: simple write/read and event write/read AIDASimpleWrite and AIDASimpleRead AIDAEventWrite and AIDAEventRead

How to use it (Writing I)How to use it (Writing I)

Declaring an AIDATuple Include GaudiKernel/IAIDATuple.h IAIDATuple* m_tuple

Booking an AIDATuple Through the atupleSvc():

atupleSvc()->book(PATH, TITLE, STRUCTURE)

Structure as std::stringstd::string columns = “float px; float py; float mass”

How to use it (Writing II)How to use it (Writing II)

Filling the tuple Basic types and IOpaqueAddress: “fill” method

m_tuple->fill(COLUMN_INDEX, DATA) Objects: “setAddress” method

Build a new object Bind the address to the column

Object* myObject = new Object()m_tuple->setAddress(COLUMN_NAME, &myObject)

After filling a row, commit changesm_tuple->addRow()

How to use it (Reading I)How to use it (Reading I)

Retrieving and registering an existing tuple Through the atupleSvc():

atupleSvc()->retrieveObject(FULLPATH, m_tuple)atupleSvc()->registerObject(STORE, TUPLE, m_tuple)

Initialize the tuplem_tuple->start()

Reading an AIDATuple Sequential access

while(m_tuple->next()… Basic types and IOpaqueAddress: “getTYPE” method Objects: “setAddress” method

Empty pointer to the object Bind the address to the column

How to use it (Reading II)How to use it (Reading II)

Filtering data Server side: “setCriteria” method Client side: “setFilter” method Both before call “start()” method Cut criteria passed as std::string

m_tuple->setCriteria(“mass > 1”)

or

m_tuple->setFilter(“mass > 1”)

m_tuple->start()

Last minute problemsLast minute problems

PI project discontinued PI moved inside GAUDI (GaudiPi package soon

avaliable) Someone responsible to maintain this code

Thanks for your attention…Thanks for your attention…

… and for not making compromising questions about the new service