sirius viewpoints and modernization paris 2015

Sirius Viewpoints & Software Modernization

Stéphane Barbey, PhDDecember 2015

Sirius Viewpoints & Software Modernization 2

About Paranor

02/12/15

Founded in 197835 Employees PhD/Msc/Bsc

Individual Software Development

ModernizationConsulting

High Standards

Model Based Approaches

DSLs

Offices in Wahlendorf (CH)Stansstadt (CH)

Cebu (PH)

FinancePublic

AdministrationTransportation

EnergyCommunication

s

Continuous innovation

state-of-the-art methods

and technologies

3

AgendaSoftware Modernization

The Respec Approach to Business Rules mining

Its Tooling

The Use of Sirius Viewpoints

02/12/15 Sirius Viewpoints & Software Modernization


I – Modernization

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Sirius Viewpoints & Software Modernization 502/12/15

Over time, any successful systemwill become a legacy system.

Software Modernization Workbench 602/12/14

First Lehman‘s Law of Software Evolution

A software system either undergoes continual change or becomes progressively less useful.


Change or decay process continues until it is judged more cost-effective to replace the system.


Why Replace?

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Skills shortage

Vendor support

Regulatory compliance

Maintenance costs

Access to data

Meeting client

expectations

Security Green IT initiatives

Disaster recovery

Interoperability

Source: TSRi


Your Journey depends on your Destination


Architecture-Driven ModernizationHorseshoe Model (OMG)

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Business Architecture

Application & DataArchitecture

TechnicalArchitecture

Longer Journey / Greater Impact

Shorter Journey / Lesser Impact

Business Domain

IT Domain

Existing Solution Target Solution

Technical Architecture-Driven

Application/Data Architecture-Driven

Business Architecture-Driven

Source: OMG


Modernization

New Implementati

onMigration

Manual Standard Tool Model-Based Generation

COTS


96%…of COTS users did not achieve all the

benefits they had expected.

Source: Accenture


Modernization

New Implementati

onMigration


COTS


7%Success rate of new implementation / manual migrations projects.

Source: Gartner


Modernization

New Implementati

onMigration


COTS


Modernization Process

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Data Migration

Models (DSLs)

Iterative MigrationAssess

Import and transform into models (DSL)

Code Generation and/or Business Semantics Extraction

Transform into models

ExtractRules &Generat

e

JavaXMLPDF…

EnterpriseArchitectu

reRepositor

y


Advantages and Benefits ofModel-based Migration

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Source: itemis

Automation• Optimization of

Quality/Cost/Time• Accurately fitting automation

leads to maintainable software• Short freeze-time• Parallel development of old and

new system

Target Architecture• Full freedom in definition of

architecture• Consistent implementation

through code generation• Easier to integrate developers

from the legacy system

Future Development• Model-driven software

development• Adaptations are easier• Cheaper Maintenance


II – Mining Business Rules

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Business Rules Mining:Extracting the essence of the business


Source code contains the whole truth


30%• …of source code contains business logic.

• Remaining supports infrastructure-related activities.

Source: Ulrich & Newcomb


RespecExtracting Business Rules• Extracting business logic from legacy code

to obtain a first-class asset for:• Architectural assessments and blueprints• Migration• Business re-engineering• and more

Respec = (code + knowhow) × tooling

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Respec Process & Tool Support

Code• Possibly

multiple programming languages

Business Logic• Readable• Descriptive• Simplified• Procedural

Business Specification• Basis for

new requirements

• Basis for code generation

• Rigorous Business Logic mining method

• Rooted in true operational business rules• Prevents “invention” of facts• Provides traceability through interlinking• Supports coverage analysis and progress

monitoring• Business Logic model and

Specification model … • Can be augmented with new or changed

requirements• Provide a precise and detailed basis for

implementation / retargeting

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“The amateur software engineer is always in search of magic, some sensational method or tool whose application promises to render software development trivial. It is the mark of the professional software engineer to know that no such panacea exist.”

Grady Booch


Bottom Up / Reverse Engineering

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Business Logic (Editor)

➔ readable➔ descriptive➔ simplified➔ procedural

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Business Logic before & afterraw BLogic (≅ Code) genuine BLogic

➔ Focus on business logic

➔ No technical noise02/12/15 Sirius Viewpoints & Software Modernization 27


BLogic before & after

Genuine BLogic➔ business terminology➔ annotated

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Bottom Up / Reverse Engineering

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Specification Composer

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Specification artifacts• Specification Composer allows to edit specification

model, mainly referencing Business Logic artifacts

• Derived products (from spec model):• generated specs as PDF or Wiki• generated viewpoints (diagrams)• generated input for EA tool/repository• basis for code generation

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III Viewpoints on Modernization Artifacts

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Viewpoints• A software system usually cannot be described with one notation for all relevant aspects.

• Also, the development process requires different aspects to be described by different roles at different times, as you want to be sure to have a clean separation of concerns.

• Hence it is important to identify the set of viewpoints relevant for describing the different concerns of a system

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Viewpoints

GraphicalTextualSpreadsheetForm...

• Provide notations and abstractions for viewpoint.

• Choose the best representation to convey the concepts you need to express.

• Consider mixed notations• E.g. text inside diagrams

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Graphical Editors• Good to express

• Sequence flows / State machines• Relationships and Dependencies• Timing / Synchronizations• ....

• Not good for e.g. expressions• ... But think of formulas

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Editors (Text)

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Every model (DSL) has its own editor, and is stored as a file, or as XML.


Editors (Forms)

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Workbench also supports form-based editors

Example: business specification editor


Editors (Graphical)

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… and graphical editors

Example: component-architecture diagram


Editors (Wireframe Sketches)

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… and UI editors

Example: wire-frame sketch for 3270 block mode terminal interface


Cartography: Impact Analysis

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Cluster visualization

of model dependencies

allows for impact

analysis and decision-

making w.r.t. iterative

migration.


Viewpoints• Consider not just the notation• But also the tooling

• Actions,• Refactorings,• Filter,• Customization,• Grouping,• Printing• ...

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Generated Documentation

Component Diagram

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Types Overview

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Types Hierarchy

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Dependency Diagrams

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Sequence Diagrams

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Sirius does not render software development trivial.

However,• Easy—one gets

diagram editors in literally hours.

• Powerful—all kinds of presentations.

• Customizable—representation and behaviour.

• Integrated-works perfectly with other eclipse modeling tools.


Thank You!Stéphane Barbey, [email protected]

02/12/15

https://www.linkedin.com/in/barbey

All illustrations used in this presentation are either owned by the author or licensed under “CC BY 2.0” or “CC BY SA 2.0”.



