java analysis studio atlas software week february 2000 tony johnson (tony_johnson@slac.stanford.edu)

Java Analysis Studio

Atlas Software Week

February 2000

Tony Johnson

(tony_johnson@slac.stanford.edu)

Contents

Motivation for Talk

Introduction to JAS + Demo

New Features

Ongoing Work/Issues

Conclusions

Motivation for Talk

JAS starts from experience with SLD interactive data analysis

IDA (Toby Burnett) + SLD extensions

Integrates ideas from • Reason, Hippodraw, LHC++, Histoscope, …

Exploit advantages of Java• Cross platform, dynamic loading, GUI, many standard API’s –

networking, HTML, etc.

AIM is to solve real life physicist problemsWant to get input from as many people as possible.

System is flexible enough to change.

JAS OverviewModular Java Toolkit for Analysis of HEP data

Data Format IndependentExperiment IndependentSupports arbitrarily complex analysis modules written in JavaRich Graphical User Interface (GUI) with:

• Data Explorer• Flexible Histogram + Scatterplot display • Histogram manipulation+fitting• Built-in Editor/Compiler (for writing analysis modules)• Extensible via plugins

User extensible via Object Orientated API'sWritten entirely in Java so will run on any platform with a Java VM (JDK 1.1 or better)

• Support: Windows 95/98/NT/2000 + Linux + Solaris• Works on: DEC + SGI + Mac

JAS Components

JASHist(Plot Bean)

FittingFramework

Functions Fitters

AnalysisFramework

GUIFramework

Plugin

HistogramAccumulation

3-4 VectorUtilities

DataInterface

Histo/PlotAdaptor

NetworkAdaptor

ParticleProperties

JetFinder

PAW SQL stdHEP

JAS GUI

JAS GUI – Histogram Viewer

JAS GUI – Editor/Compiler

JAS GUI – Plugin

JAS – Remote Data Access

Rather than transporting peta-bytes of data to the physicist

Transport the physics analysis code to the data

Transparently - so that it feels just like local data access

Using Java-Agent Technology

Just ship histogram contents back to the physicists desktop

For more background on JAS see CHEP 98 paper

Distributed Data Analysis

Network Data Server

Desktop Client

Network Data Controller

Distributed DataData Server DIMData Server DIMData Server DIMData Server DIMData Server DIM“The GRID” DIM

Example of Using Track Recon.

New Features

Modular Plot ComponentCan be used in other applications

• GUI, servlets

Model-view-controller designSupports many display styles, 1d, 2d, scatterplot, fitting, slices, user interaction, XML for data interchange with other apps.

jEdit EditorFull featured program editor

• Syntax highlighting, indenting, bracket matching

Expect to be able to integrate advanced features• Debugging, auto-completion

New Features – HTML support

Future Features - 3D Support

UsageBabar using for Online Monitoring

Using Online Monitoring APIHTML Pages with embedded plotsCustom Overlays

US Linear Collider StudiesHave an entire recon+analysis package written in Java

• Using JAS as analysis interface• Making use of remote data access using repository at University of

Pennsylvania

CLEOUsing plot bean for online displays

Other smaller scale usersAll giving very valuable feedback

Helping to produce more reliable solution

OpenSource – Experiments can Contribute!

All source code now stored in CVS Use any CVS client for anonymous (read-only) access

• We recommend jCVS (pure Java CVS client)

Source code all web browsable • Implemented using jCVS servlet

Write access can be given to interested developers

Intend to put entire code under LGPLPlatform independent build system

Uses jmk - pure java make-like tool• To build entire system on any platform with CVS and Java

cvs co jas cd jas java -jar jmk.jar

DocumentationLCD Tutorial exists

Nice step by step tutorial for beginners Examples are all based on LCD but can be used by anyoneStarts from very beginning

Slowly adding information to Users Guide Still nowhere near complete

How To being created to cover specific topics Servlets How ToHTML How ToXML How ToOnline API How ToWorking on Fitting How To

JavaDoc generated API documentation availableDocumentation remains weak link

We are aware of this and are working on producing more documentationAlso need more design specs/internals documentation to make open source model more effective

Ongoing Work + Requests

RequestsFitting from program

Page layout from program

Scripting – What exactly is wanted?

Integration with Wired

Integration with LHC++AIDA – Generic histogram interfaces

Ongoing Work cont.

Data AccessCurrent – PAW, stdHEP, SQL, Flat file, Java Objects.

Ongoing: Objectivity (Dino, Xavier)

Future: Root, Generic C++ Objects?

For flexibility Atlas needs simple data objectsLightweight transient/persistent layer

Minimize unnecessary use of templates

Think about access from other languages

Acknowledgements

Many People have contributed codePeter Armstrong, Kevin Garwood, Jonas Gifford, Azhar Zuberi.

Gary Bower, Kevin Rennert, Alex Samuel, Bob Wilson

And support/ideasMike Ronan …

Conclusions

Version 2.0 Alpha 2 is available from our website

http://jas.freehep.org/

2.0 Alpha 3 coming very soon• In use by Babar, needs Productization

We remain committed to supporting JASPlan to continue to improve it

Very adaptable to user input