Patterns

What

• Patterns are just a common solution, to a common problem using a ubiquitous language

  • ease to describe and discuss them

  • patterns can be the same, but be different in terms of their aims

• Patterns occurs not just object oriented code, but in other areas see Types of patterns

  • patterns can language specific, ie see effective java by Bloc

• In essence, they are used to make code more changeable.

• Depending on the language used, or libraries, or tech, these will either implement these patterns (fill in the gaps) or make them redundant

Types of patterns

• code

  • functional

  • oo

• language specific

• integration

• module

• architectural

• database

• tests

• ops - CI, deployments, platform, builds,

• workflow

• concurrency

• enterprise

• front end

• security

• Debugging

• team patterns

  • conventions

• department patterns

Issues

• people can be over eager, in implementing patterns, when they are not needed

• Only use them if they improve some aspect (NFR) which is needed

• patterns over usage can increase complexity for no reason

links

• https://www.quora.com/A-senior-software-engineer-in-our-team-told-me-that-the-popularity-of-design-patterns-has-led-to-a-kind-of-pattern-abuse-and-over-designing-by-novice-programmers-what-does-he-mean

Links

• https://java-design-patterns.com/patterns/

• https://dzone.com/articles/design-patterns-in-the-age-of-microservices-and-frameworks

Updated for java 8

• https://www.infoq.com/news/2022/10/modern-java-design-patterns/