“How do I analyze the data?”

-- everyone who’s ever analyzed data

“How do I access the data?”

Analysis Framework

Analysis Framework

Defines how packages:

Access data needed for input

Publish data for output

Read in and write out events

Access calibration constants (database)

Event Level

Run Level

PID

Tracks

FCAL Showers

BCAL Showers

Cherenkov

TOFCDC

FDC

FCAL HitsBCAL Hits

PID

Tracks

Cherenkov

CDC

FDC

FCAL Showers

TOF

BCAL Showers

DANA

FCAL HitsBcal Hits

DEventLoop

DEvent

DEventProcessor(called every event)

DFactory(data on demand)

C++: Object Oriented

Framework keeps track of run number and calls “brun” routinesAll Analysis Software is Implemented in DFactory Objects

Data Access and Storage in DANA

• Use STL vectorSTL=Standard Template Libraryvector = “smart” array

• Use const pointersFactories deliver read-only data eliminating cross-factory data corruption

• Use templatesProvides type safety removing need to “cast” pointers which can lead to difficult errors.

Important Goal:

The analysis framework should be designed to provide a very shallow learning curve for new users.

One should NOT need to be a C++ expert to analyze Hall-D data!

A Real Life Example:

vector<const DCDCHit*> cdchits;eventLoop->Get(cdchits);

for(int i=0; i<cdchits.size(); i++){float x = cdchits[i].x;float y = cdchits[i].y;

}

BMS: Build Management System

Benefits of using a central Make system

• Reduces maintenance of individual Makefiles

• Encourages better maintenance of source directories

• Consistent use of compiler options

• GlueX-doc-473

Summary

• DANA exists in repository and continues to be refined, but is ready for use. Several programs currently use it (hdview, hd_ana, patfind, hd_dump)

• BMS makefile system provides standardization of software builds

• Software group is committed to a shallow learning curve.

Other Active, General Use Software Projects

• Package Management Ed Brash

• Online (CMsg) Elliott Wolin

• 3D Event Viewer Matt Bellis

• UPV simulation Alexander Ostrovidov

• FCAL Reconstruction Craig Bookwalter

• BCAL Reconstruction Chucheng Xu

• Openshop Framework Richard Jones

• Nightly Builds (+ doxygen) David Lawrence