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Commit89e7f51

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Merge pull requestiluwatar#519 from iluwatar/presentation
Add hexagonal architecture presentation
2 parentscc02ff4 +1abf5b1 commit89e7f51

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‎hexagonal/README.md

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##Applicability
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Use Hexagonal Architecture pattern when
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*it is important that the application is fully testable
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*you use Domain Driven Design methodology and/or Microservices architectural style
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*When the application needs to be independent of any frameworks
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*When it is important that the application highly maintainable and fully testable
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##Tutorials
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*[Build Maintainable Systems With Hexagonal Architecture](http://java-design-patterns.com/blog/build-maintainable-systems-with-hexagonal-architecture/)
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##Presentations
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*[Hexagonal Architecture](https://github.com/iluwatar/java-design-patterns/tree/master/hexagonal/etc/presentation.html)
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##Real world examples
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*[Apache Isis](https://isis.apache.org/)
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*[Apache Isis](https://isis.apache.org/) builds generic UI and REST API directly from the underlying domain objects
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##Credits
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‎hexagonal/etc/layers.png

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‎hexagonal/etc/ports_and_adapters.png

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‎hexagonal/etc/ports_and_adapters.xml

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<mxfile userAgent="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.90 Safari/537.36" version="6.0.1.3" editor="www.draw.io" type="device"><diagram name="Page-1">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</diagram></mxfile>

‎hexagonal/etc/presentation.html

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<!DOCTYPE html>
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<html>
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<head>
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<title>Title</title>
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<metacharset="utf-8">
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<style>
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@importurl(https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz);
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@importurl(https://fonts.googleapis.com/css?family=Droid+Serif:400,700,400italic);
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@importurl(https://fonts.googleapis.com/css?family=Ubuntu+Mono:400,700,400italic);
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body {font-family:'Droid Serif'; }
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h1,h2,h3 {
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font-family:'Yanone Kaffeesatz';
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font-weight: normal;
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}
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.remark-code, .remark-inline-code {font-family:'Ubuntu Mono'; }
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</style>
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</head>
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<body>
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<textareaid="source">
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class: center, middle
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# Hexagonal Architecture
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---
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# Also known as
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* Ports and Adapters
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* Clean Architecture
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* Onion Architecture
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---
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# Layered architecture problems
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* No clear application core
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* Business logic leaks to the presentation layer
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<br/>
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<br/>
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.center[![Alt text](layers.png)]
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---
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# Intent
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* Application can be driven by users, programs, automated test or batch scripts
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* Application can be developed and tested in isolation from its eventual run-time devices and databases
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---
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# Applicability
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Use Hexagonal Architecture pattern
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* When the application needs to be independent of any frameworks
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* When it is important that the application highly maintainable and fully testable
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---
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# Concepts
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* Ports are interfaces
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* The ports that drive the application are called primary ports
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* The ports that are driven by the application are called secondary ports
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---
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# Concepts
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* Adapters are interface implementations
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* Typically different adapters for testing and production are provided
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---
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# Diagram
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.center[![Alt text](ports_and_adapters.png)]
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---
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# Real world examples
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* [Apache Isis](https://isis.apache.org/) builds generic UI and REST API directly from the underlying domain objects
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---
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# Tutorials
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* Blog http://java-design-patterns.com/blog/build-maintainable-systems-with-hexagonal-architecture/
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* Source code http://java-design-patterns.com/patterns/hexagonal/
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</textarea>
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<scriptsrc="https://gnab.github.io/remark/downloads/remark-latest.min.js">
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</script>
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<script>
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varslideshow=remark.create();
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</script>
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</body>
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</html>
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