cfdfedbd2e
* #496 Add pipeline module to parent pom ✨ * #496: Add main application class and test for pipeline * #496: Checkstyle format and add log messages on pipeline stages 🎨 * #496: Fill readme sections of pipeline ✨ * #496: Javadocs and checkstyle formatting 🎨 * #496: Follow PMD checks and add more explanation as block comment on App.java * #496: Apply requested PR changes by iluwatar 🎨 * #970: Replace log4j usage on commander pattern to Slf4j API 🎨 * #970: Replace log4j usage on dao pattern to Slf4j API 🎨 * #970: Replace log4j usage on data mapper pattern to Slf4j API 🎨 * #970: Remove log4j dependency on data transfer object pom 🔥 * #970: Replace log4j usage on module pattern to Slf4j API 🎨 * #970: Replace log4j usage on serverless pattern to Slf4j API 🎨 This also removes the aws log4j dependency * #970: Remove unnecessary gitignore line for log4j.xml 🔥 * #970: Remove remaining remnants of log4j 🔥 * #970: Replace System.out logging with appropriate logging methods 🎨 * #970: Replace System.out method references to Logger::info 🎨
layout, title, folder, permalink, categories, tags
| layout | title | folder | permalink | categories | tags | ||
|---|---|---|---|---|---|---|---|
| pattern | Data Mapper | data-mapper | /patterns/data-mapper/ | Persistence Tier |
|
Intent
A layer of mappers that moves data between objects and a database while keeping them independent of each other and the mapper itself
Applicability
Use the Data Mapper in any of the following situations
- when you want to decouple data objects from DB access layer
- when you want to write multiple data retrieval/persistence implementations