bUiLdiNG eVoLuTiONaRy ARcHitECtuREs S UPPORT C ONSTANT C HANGE - - PowerPoint PPT Presentation

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building evolutionary architectures
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bUiLdiNG eVoLuTiONaRy ARcHitECtuREs S UPPORT C ONSTANT C HANGE - - PowerPoint PPT Presentation

Mar 14, 2024 152 likes •1.2k views

bUiLdiNG eVoLuTiONaRy ARcHitECtuREs S UPPORT C ONSTANT C HANGE @neal4d @rebeccaparsons @patkua nealford.com requirements T i m e g ility n accessibility reliability repeatability accountability extensibility reproducibility

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bUiLdiNG eVoLuTiONaRy ARcHitECtuREs

SUPPORT CONSTANT CHANGE

@neal4d nealford.com @patkua @rebeccaparsons

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requirements

T i m e

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s a m p l i n g

accessibility reliability repeatability accountability extensibility reproducibility accuracy failure transparency resilience adaptability fault-tolerance responsiveness administrability fidelity reusability affordability flexibility robustness agility inspectability safety auditability installability scalability autonomy integrity seamlessness availability interchangeability self-sustainability compatibility interoperability serviceability composability learnability supportability configurability maintainability securability correctness manageability simplicity credibility mobility stability customizability modifiability standards compliance debugability modularity survivability degradability

  • perability

sustainability determinability

  • rthogonality

tailorability demonstrability portability testability dependability precision timeliness deployability predictability traceability discoverability process capabilities transparency distributability producibility ubiquity durability provability understandability effectiveness recoverability upgradability efficiency relevance usability

https://en.wikipedia.org/wiki/List_of_system_quality_attributes

ility

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evolvability

accessibility reliability repeatability accountability extensibility reproducibility accuracy failure transparency resilience adaptability fault-tolerance responsiveness administrability fidelity reusability affordability flexibility robustness agility inspectability safety auditability installability scalability autonomy integrity seamlessness availability interchangeability self-sustainability compatibility interoperability serviceability composability learnability supportability configurability maintainability securability correctness manageability simplicity credibility mobility stability customizability modifiability standards compliance debugability modularity survivability degradability

  • perability

sustainability determinability

  • rthogonality

tailorability demonstrability portability testability dependability precision timeliness deployability predictability traceability discoverability process capabilities transparency distributability producibility ubiquity durability provability understandability effectiveness recoverability upgradability efficiency relevance usability

evolvability

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cHAnGe

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technology driven business driven

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technology driven business driven

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technology driven business driven

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dYNaMic eqUiLiBRiuM

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¯

dYNaMic eqUiLiBRiuM

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everything changes all the time!

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How is long term planning possible when things constantly change in unEXpECtEd ways?

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EA Spreadsheet

Penultima⬆e

✔ definition ! verification

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Once I’ve built an architecture, how can I prevent it from gradually degrading over time?

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governance

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Evolutionary Architecture

An evolutionary architecture supports guided, incremental change across multiple dimensions.

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Evolutionary Architecture

An evolutionary architecture supports guided, incremental change across multiple dimensions. guided

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guided

evolutionary computing fitness function: a particular type of objective function that is used to summarize…how close a given design solution is to achieving the set aims.

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guided

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guided

evolutionary computing fitness function: a particular type of objective function that is used to summarize…how close a given design solution is to achieving the set aims.

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guided

architectural fitness function: An architectural fitness function provides an

  • bjective integrity assessment of some

architectural characteristic(s).

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EA Spreadsheet

Penultima⬆e

✔ definition ! verification ✔ verification

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Evolutionary Architecture

An evolutionary architecture supports guided, incremental change across multiple dimensions. incremental guided

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incremental

Production

survey

shipping

catalog star rating improved star rating commit/ unit test 01001001010101 01010101010101 00101010010010 00100100010001 functional test UAT staging database unit tested code functionally tested code deployed code
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Penultima⬆e

Production

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Penultima⬆e

Production

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Penultima⬆e

Production

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Penultima⬆e

Production

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Production

Penultima⬆e

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Evolutionary Architecture

An evolutionary architecture supports guided, incremental change across multiple dimensions. multiple dimensions incremental

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multiple dimensions

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Evolutionary Architecture

An evolutionary architecture supports guided, incremental change across multiple dimensions. multiple dimensions

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Agenda

Definition Guided Change via Fitness Functions Incremental Change Governance

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Evolutionary Architecture

An evolutionary architecture supports guided, incremental change across multiple dimensions. guided

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guided

architectural fitness function: An architectural fitness function provides an

  • bjective integrity assessment of some

architectural characteristic(s).

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Fitness Functions

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Fitness Function

atomic holistic triggered continuous

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Fitness Function

atomic holistic triggered continuous

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Cyclic Dependency Function

clarkware.com/software/JDepend.html application

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Coupling Fitness Function

application

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Consumer Driven Contracts

martinfowler.com/articles/consumerDrivenContracts.html

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Fitness Function

atomic holistic triggered continuous

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Fitness Function

atomic holistic triggered continuous

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Fitness Function

atomic holistic triggered continuous

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holistic triggered

Holistic fitness functions must run in a specific (shared) context.

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Fitness Function

atomic holistic triggered continuous

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Fitness Function

atomic holistic triggered continuous

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Fitness Function

atomic holistic triggered continuous

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atomic continuous

monitoring logging

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Synthetic Transactions

Sam Newman

Building Microservices

DESIGNING FINE-GRAINED SYSTEMS

Use synthetic transactions to test production systems.

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Correlation IDs

ID: 123 ID: 123 ID: 123

Sam Newman

Building Microservices

DESIGNING FINE-GRAINED SYSTEMS

Use correlation IDs to track down nasty bugs

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Fitness Function

atomic holistic triggered continuous

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Fitness Function

atomic holistic triggered continuous

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Fitness Function

atomic holistic triggered continuous

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Fitness Function

atomic holistic triggered continuous

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Fitness Function

atomic holistic triggered continuous

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Fitness Function Fit

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System-wide Fitness Function

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Agenda

Definition Guided Change via Fitness Functions Incremental Change Governance

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incremental

Production

survey

shipping

catalog star rating improved star rating commit/ unit test 01001001010101 01010101010101 00101010010010 00100100010001 functional test UAT staging database unit tested code functionally tested code deployed code
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Deployment Pipelines

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Deployment Pipeline

commit/ unit test

01001001010101 01010101010101 00101010010010 00100100010001

functional test UAT staging

database

unit tested code functionally tested code deployed code

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Deployment Pipeline + Fitness Functions

commit/ unit test

01001001010101 01010101010101 00101010010010 00100100010001

functional test UAT holistic fitness functions

database

atomic fitness functions

unit tested code functionally tested code architecturally tested code deployed quantum integration environment

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Agenda

Definition Guided Change via Fitness Functions Incremental Change Governance

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Implementing Fitness Functions

Protecting architectural characteristics

Automating governance

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maintainable?

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Testable

Many architecture characteristics are evaluable via testing.

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https://blog.jdriven.com/2017/10/implementing-architectural-fitness-functions-using-gradle-junit-code-assert/

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ArchUnit

https://www.archunit.org/

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ArchUnit

https://www.archunit.org/

coding rules

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ArchUnit

https://www.archunit.org/

interface rules

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ArchUnit

https://www.archunit.org/

layer dependency

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ArchUnit

https://www.archunit.org/

governance

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01001001010101 01010101010101 00101010010010 00100100010001

containerize & deploy security review audit database atomic fitness functions database holistic fitness functions database deploy to production

Deployment Pipeline

Penultima⬆e

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Putting evolutionary architecture into Practice

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Mechanics

  • 1. Identify dimensions affect by evolution
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  • 1. Identify dimensions affect by evolution
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Mechanics

  • 1. Identify dimensions affect by evolution
  • 2. Define Fitness Function(s) for Each

Dimension

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  • 2. Define Fitness Function(s) for Each

Dimension

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Mechanics

  • 1. Identify dimensions affect by evolution
  • 2. Define Fitness Function(s) for Each

Dimension

  • 3. Use Deployment Pipelines to Automate

Fitness Functions

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  • 3. Use Deployment Pipelines to Automate

Fitness Functions

commit/ unit test

01001001010101 01010101010101 00101010010010 00100100010001

functional test UAT holistic fitness functions

database

atomic fitness functions

unit tested code functionally tested code architecturally tested code deployed quantum integration environment

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Mechanics

  • 1. Identify dimensions affect by evolution
  • 2. Define Fitness Function(s) for Each

Dimension

  • 3. Use Deployment Pipelines to Automate

Fitness Functions

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Mechanics

  • 1. Identify dimensions affect by evolution
  • 2. Define Fitness Function(s) for Each

Dimension

  • 3. Use Deployment Pipelines to Automate

Fitness Functions

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Agenda

Definition Guided Change via Fitness Functions Incremental Change Governance

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Move Fast & Fix Things

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https://github.com/github/scientist

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▫︎ It decides whether or not to run the try block, ▫︎ Randomizes the order in which use and try blocks are

run,

▫︎ Measures the durations of all behaviors, ▫︎ Compares the result of try to the result of use, ▫︎ Swallows (but records) any exceptions raised in the try

block

▫︎ Publishes all this information.

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4 days 24 hours/ no mismatches or slow cases > 10,000,000 comparisons > 10,000,000 comparisons

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Evolutionary Architecture

An evolutionary architecture supports guided, incremental change across multiple dimensions.

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Building Evolutionary Architectures

For more information: http://evolutionaryarchitecture.com