#352- Unit Of Work : added the readme file

unit-of-work/README.md

@@ -0,0 +1,31 @@
+---
+layout: pattern
+title: Unit Of Work
+folder: unit-of-work
+permalink: /patterns/unit-of-work/
+pumlid: 
+categories: Architectural
+tags:
+ - Java
+ - KISS
+ - YAGNI
+ - Difficulty-Beginner
+---
+
+## Intent
+When a business transaction is completed all the these updates are sent as one 
+  big unit of work to be persisted in a database in one go so as to minimize database trips. 
+
+![alt text](etc/unit-of-work.urm.png "unit-of-work")
+
+## Applicability
+Use the Unit Of Work pattern when
+
+* The client is asking to optimize the time taken for database transactions.
+* When you want to boost the performance to get database records.
+* You want reduce number of database calls.
+
+## Credits
+
+* [Design Pattern - Unit Of Work Pattern](https://www.codeproject.com/Articles/581487/Unit-of-Work-Design-Pattern)
+* [Unit Of Work](https://martinfowler.com/eaaCatalog/unitOfWork.html)