Using an ADL to describe a large information system Eoin Woods - PowerPoint PPT Presentation

Dec 02, 2022 •280 likes •373 views

Using an ADL to describe a large information system Eoin Woods eoin.woods@artechra.com 1 Wednesday, 22 August 12 Introducing the Project Very established system (15 years) widely used, actively developed multiple languages (Perl, Java, C++,

Using an ADL to describe a large information system Eoin Woods eoin.woods@artechra.com 1 Wednesday, 22 August 12
Introducing the Project Very established system (15 years) widely used, actively developed multiple languages (Perl, Java, C++, C#, ...) over 10 MLOC variable quality of documentation and code Urgent need to extend and improve so immediate need to understand Project formed to “document” the system 2 Wednesday, 22 August 12
Project Context 20 teams on 4 primary sites Little enthusiasm for this exercise needed to be sold at every level and every stage Varied experience with modelling but in general little to none no general experience of UML or other notations no widely available modelling tools Daunting but an interesting opportunity! 3 Wednesday, 22 August 12
The ADL and Approach Unbelievably we defined our own ADL 12 component types, 5 connector types ADL elements tied directly to the system “style” Notation design done very deliberately Daniel Moody - “Physics” of notations Tools and support materials from the start Visio, wiki, templates, examples, training, ... 4 Wednesday, 22 August 12
ADL Graphical Notation <<Message Based Server>> <<GUI>> ORDERUIREQ(OrderUiCmd) Order Management Server Order Manager (a) Thick client UI and message driven server price,rate,pricehist,ratehist, <<BatchPgm>> <<database>> fileload pricedb BBG Price Loader <<filesystem>> BBG Daily Price Files (b) File Loader, reads files, writes to database 5 Wednesday, 22 August 12
Deliverables A description for most of the system hosted as a tree of wiki pages reasonably accurate & consistent Informal but thorough definition of the architectural style of the system a new concept to the organisation A new degree of understanding style, complexity, interconnectedness, module criticality ... insights to guide decision making 6 Wednesday, 22 August 12
Techniques and Lessons Simplicity Match the notation to the system’s real style Don’t complicate by solving the general case Keep tools simple and familiar (Visio, Wiki) Technology transfer is crucial to acceptance carefully designed notation really helps support materials are critical Nuanced communication is important to keep cooperation and communicate the value 7 Wednesday, 22 August 12
Questions? Eoin Woods www.eoinwoods.info @eoinwoodz 8 Wednesday, 22 August 12

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