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java-design-patterns/repository
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Anurag Agarwal 9c8ad4485b Resolves checkstyle errors for patterns starting with letter r (#1072) 
* Reduces checkstyle errors in reactor

* Reduces checkstyle errors in reader-writer-lock

* Reduces checkstyle errors in repository

* Reduces checkstyle errors in resource-acquisition-is-initialization

* Reduces checkstyle errors in retry
2019-11-10 19:42:26 +02:00
..
etc
#190 Remove urm plugin
2017-11-28 20:55:52 +02:00
src
Resolves checkstyle errors for patterns starting with letter r (#1072)
2019-11-10 19:42:26 +02:00
pom.xml
Update license headers
2019-10-12 20:05:54 +03:00
README.md
Added one more Credit/Article about the benefits of Repository pattern (#882)
2019-07-29 21:31:42 +03:00

README.md

layout, title, folder, permalink, categories, tags
layout title folder permalink categories tags
pattern Repository repository /patterns/repository/ Persistence Tier
Java
Difficulty-Intermediate
Spring

Intent

Repository layer is added between the domain and data mapping layers to isolate domain objects from details of the database access code and to minimize scattering and duplication of query code. The Repository pattern is especially useful in systems where number of domain classes is large or heavy querying is utilized.

alt text

Applicability

Use the Repository pattern when

  • the number of domain objects is large
  • you want to avoid duplication of query code
  • you want to keep the database querying code in single place
  • you have multiple data sources

Real world examples

Credits