Brahms Tutorial
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Brahms Tutorial
TM01-0002
Version 1.2
30 March 2011
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Technical Memorandum
TM01-0002
BRAHMS TUTORIAL
VERSION 1.2
CONTACT
Brahms Contact
William Clancey – Project Lead (650) 604-2526
ABSTRACT
This document is a guide to programming in Brahms, an agent-oriented modeling language.
DATE: 30 March 20
KEYWORDS: Brahms, Tutorial
This document has not been reviewed by the Intellectual Property Organization.
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM Refer to the NX Brahms location for the latest version.
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Brahms Tutorial Version 1.2 Page iii
TM01-0002 3/31/2011 Prologue
CONTRIBUTORS
Alessandro Acquisti
William J. Clancey
Ron van Hoof
Mike Scott
Maarten Sierhuis
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM Refer to the NX Brahms location for the latest version.
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Brahms Tutorial ...
Brahms Tutorial
TM01-0002
Version 1.2
30 March 2011
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Technical Memorandum
TM01-0002
BRAHMS TUTORIAL
VERSION 1.2
CONTACT
Brahms Contact
William Clancey – Project Lead (650) 604-2526
ABSTRACT
This document is a guide to programming in Brahms, an agent-oriented modeling language.
DATE: 30 March 20
KEYWORDS: Brahms, Tutorial
This document has not been reviewed by the Intellectual Property Organization.
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM Refer to the NX Brahms location for the latest version.
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Brahms Tutorial Version 1.2 Page iii
TM01-0002 3/31/2011 Prologue
CONTRIBUTORS
Alessandro Acquisti
William J. Clancey
Ron van Hoof
Mike Scott
Maarten Sierhuis
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM Refer to the NX Brahms location for the latest version.
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Brahms Tutorial Version 1.2 Page iv
TM01-0002 3/31/2011 Prologue
APPROVED
William Clancey Date
Project Lead
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM Refer to the NX Brahms location for the latest version.
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Brahms Tutorial Version 1.2 Page v
TM01-0002 3/31/2011 Prologue
Revision History
Version Contact Action
Version 0.1 Draft Alessandro Acquisti New Initial draft.
02/01/2001 510/823-5008
Version 0.2 Draft Alessandro Acquisti Add Added sections Q&A and proposed schedule of Tutorial.
02/21/2001 510/823-5008
Version 0.4 Draft Alessandro Acquisti Add, Extensive revision of structure and content. Added
03/15/2001 Change material from: 1) Maarten Sierhuis‘s PhD thesis; 2) 510/823-5008
Brahms Language Specification TM99-0008; 3) Brahms
Installation readme.txt file; 4) Brahms 2001 TM01-0001
Project Plan. Added initial code.
Version 0.5 Draft Alessandro Acquisti Change Extensive revision of structure and content. Revised
03/29/2001 chapter 4, sections 1-4 510/823-5008
Version 0.6 Draft Alessandro Acquisti Change Extensive revision of structure and content. Revised
04/01/2001 chapter 4, sections 5 et seq. 510/823-5008
Version 0.7 Draft Alessandro Acquisti Add, Added tutorial code and discussion to chapter 4.
04/10/2001 Change 510/823-5008
Version 0.8 Draft Alessandro Acquisti Add, Added links to Tutorial Files.
04/15/2001 Change 510/823-5008 Cleaned up various sections after Ron‘s comments
Version 0.9 Draft Alessandro Acquisti Add, Added Bill, Maarten, Ron, and Charis‘ comments.
04/17/2001 Change General revision and updates. 510/823-5008
Version 0.9.4 Request Alessandro Acquisti Add, Added hyperlinks, index. Changed color and format for
for Comments Change code sections, figures, tables. Edited ‗Validation‘ 510/823-5008
05/12/2001 chapter. Added new links to code.
Version 0.9.5 Request Alessandro Acquisti Change General clean-up. Modified sections to reflect transition
for Comments from SimAgent 1.0 to Agent Environment. 510/823-5008
05/26/2001
Version 0.9.6 Request Alessandro Acquisti Change Added new screenshot figures and corrected some
for Comments areas. 510/823-5008
06/12/2001
Actions Taken are: New = new document, Add/Delete/Change = a section or topic has been added, or deleted, or changed.
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM Refer to the NX Brahms location for the latest version.
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Brahms Tutorial Version 1.2 Page vi
TM01-0002 3/31/2011 Prologue
Version Contact Action
Version 0.9.7 Request Alessandro Acquisti Add Added Ron‘s answers to language questions from
for Comments Brahms Forums. 510/823-5008
06/25/2001
Version 0.9.8 Request Alessandro Acquisti Add, Added reference section. Changed Agent Viewer
for Comments Change description. Changed other parts in response to 510/823-5008
06/30/2001 comments and suggestions from test-users.
Version 0.9.9 Request Maarten Sierhuis Add, Made changes and added details in several sections.
for Comments Change 510/604-4917
07/11/2001
Version 0.9.9.4 Request Alessandro Acquisti Add, Added new material originated from feedback of new
for Comments Change Brahms users. Extensively revised previous material. 510/823-5008
07/11/2001 Adapted code. Altered the structure and order of
Chapters 2 and 3.
Version 0.9.9.5 Request Alessandro Acquisti Add, Corrected typos in various sections and inserted
for Comments Change Composer description. 510/823-5008
01/01/2003
Version 1.0 Alessandro Acquisti Add, General clean up and revision.
Change 07/01/2003 510/823-5008
Version 1.1 Bin Zhang, Add, Updated to conform to new Brahms Composer. New
10/24/2005 Change language specifications *not* yet added. Alessandro Acquisti
Version 1.2 Ron van Hoof Change Updated to conform to new Brahms Agent Environment.
3/30/2011 New language specifications *not* yet added.
Actions Taken are: New = new document, Add/Delete/Change = a section or topic has been added, or deleted, or changed.
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM Refer to the NX Brahms location for the latest version.
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Brahms Tutorial Version 1.2 Page vii
TM01-0002 3/31/2011 Prologue
TABLE OF CONTENTS
1. INTRODUCTION ................................................................................................................................ 1-1
1.1 PURPOSE ...... 1-1
1.2 INTENDED AUDIENCE ...................... 1-2
1.3 DOCUMENT SUMMARY .................................................................................................................... 1-2
1.4 DOCUMENT CONVENTIONS ............. 1-2
1.5 ACKNOWLEDGEMENTS ................... 1-2
1.6 CONTACTS AND HELP..................... 1-3
2. OVERVIEW OF BRAHMS AND THE ATM SCENARIO .................................................................... 2-4
2.1 WHAT IS BRAHMS? AN INTRODUCTION TO ITS THEORETICAL FOUNDATIONS AND CONCEPTS ............. 2-4
2.2 ANATOMY OF A BRAHMS MODEL: THE ATM SCENARIO ..... 2-6
2.3 OBJECT-ORIENTED PROGRAMMING AND BRAHMS ............................................................................ 2-9
2.3.1 The Atm case in object-oriented programming .... 2-9
2.3.2 The Atm case in Brahms .................................... 2-10
3. INSTALLATION AND COMPONENTS ............................................................ 3-13
3.1 BRAHMS OVERVIEW ..................................................................................... 3-13
3.2 INSTALLATION .............................. 3-13
3.2.1 Installing Brahms Agent Environment ................................................ 3-13
3.2.2 Installing MySQL ................. 3-14
3.2.3 Installing the License File ................................................................... 3-14
3.2.4 Choosing the Brahms Model Directory ............... 3-15
3.2.5 The Atm Files ..................................................................................................................... 3-15
3.2.6 To Summarize: What you Will Need .................. 3-16
3.3 DESCRIPTION OF COMPONENTS ................................................................................................... 3-16
3.3.1 Introduction: The Life of a Brahms Simulation ... 3-16
3.3.2 The Brahms Composer: Opening, Creating, and Building a Model ... 3-17
3.3.3 The Brahmsposer and the Virtual Machine: running a Model .... 3-24
3.3.4 Brahms Agent Viewer ......................................................................................................... 3-26
3.4 SUMMARY OF STEPS .................... 3-30
3.5 A NOTE ON DEBUGGING… ........... 3-31
3.6 KNOWN BUGS IN BRAHMS AGENT ENVIRONMENT .......... 3-31
3.7 CONTACTING THE BRAHMS PROJECT TEAM FOR TECHNICAL SUPPORT........................................... 3-31
3.8 OTHER IMPORTANT DOCUMENTS .................................................................. 3-32
3.9 LATEST CHANGES ........................................................ 3-32
3.10 DOCUMENT INDEX .................................................... 3-33
4. ATM SCENARIO .............................. 4-34
4.1 STRUCTURE OF THE SCENARIO ..................................................................................................... 4-35
4.2 EXPECTATIONS AND GOALS .......... 4-35
4.3 LESSON I: GETTING STARTED ....... 4-37
4.3.1 Introduction ......................................................................................................................... 4-37
4.3.2 Task .................................... 4-37
4.3.3 Description: compilation unit ............................... 4-37
4.3.4 Tutorial 4-38
Printed on: This is an uncontrolled copy when printed.
3/31/11 3:08 PM Refer to the NX Brahms location for the latest version.
NOTICE: Not for use or disclosure outside of NASA Ames Research Center except under written agreement.
© 2001-2011 NASA Ames Research Center. All Rights Reserved.
Brahms Tutorial Version 1.2 Page viii
TM01-0002 3/31/2011 Prologue
4.3.5 Sy
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