java-design-patterns/business-delegate/README.md

---
layout: pattern
title: Business Delegate
folder: business-delegate
permalink: /patterns/business-delegate/
categories: Structural
tags:
 - Decoupling
---

## Intent
The Business Delegate pattern adds an abstraction layer between
presentation and business tiers. By using the pattern we gain loose coupling
between the tiers and encapsulate knowledge about how to locate, connect to,
and interact with the business objects that make up the application.

## Class diagram
![alt text](./etc/business-delegate.png "Business Delegate")

## Applicability
Use the Business Delegate pattern when

* you want loose coupling between presentation and business tiers
* you want to orchestrate calls to multiple business services
* you want to encapsulate service lookups and service calls

## Credits

* [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2)
Work towards #56: Splitting up the README I did the job and splitted up the readme, hopefully everything was splitted correctly... 2015-08-13 23:54:40 +02:00			`---`
			`layout: pattern`
			`title: Business Delegate`
			`folder: business-delegate`
Work towards #56: Add permalink to every pattern This makes cleaner URLs thanks to jekyll 2015-08-15 18:03:05 +02:00			`permalink: /patterns/business-delegate/`
https://github.com/iluwatar/java-design-patterns-web/issues/8 Update pattern categories and tags 2019-12-13 21:09:28 +02:00			`categories: Structural`
Categorize and tag all patterns #213 2015-12-28 15:52:44 +02:00			`tags:`
https://github.com/iluwatar/java-design-patterns-web/issues/8 Update pattern categories and tags 2019-12-13 21:09:28 +02:00			`- Decoupling`
Work towards #56: Splitting up the README I did the job and splitted up the readme, hopefully everything was splitted correctly... 2015-08-13 23:54:40 +02:00			`---`

Use headings instead of bold text in index.md #238 2016-01-03 21:14:30 +01:00			`## Intent`
			`The Business Delegate pattern adds an abstraction layer between`
Work towards #56: Splitting up the README I did the job and splitted up the readme, hopefully everything was splitted correctly... 2015-08-13 23:54:40 +02:00			`presentation and business tiers. By using the pattern we gain loose coupling`
			`between the tiers and encapsulate knowledge about how to locate, connect to,`
			`and interact with the business objects that make up the application.`

#1113 Link uml-reverse-mapper created class diagrams to readme, where needed 2019-12-07 20:01:13 +02:00			`## Class diagram`
Work towards #56: Splitting up the README I did the job and splitted up the readme, hopefully everything was splitted correctly... 2015-08-13 23:54:40 +02:00			`![alt text](./etc/business-delegate.png "Business Delegate")`

Use headings instead of bold text in index.md #238 2016-01-03 21:14:30 +01:00			`## Applicability`
			`Use the Business Delegate pattern when`
Work towards #56: Splitting up the README I did the job and splitted up the readme, hopefully everything was splitted correctly... 2015-08-13 23:54:40 +02:00
			`* you want loose coupling between presentation and business tiers`
			`* you want to orchestrate calls to multiple business services`
Work towards #56: Add permalink to every pattern This makes cleaner URLs thanks to jekyll 2015-08-15 18:03:05 +02:00			`* you want to encapsulate service lookups and service calls`
Work on #226, moved pattern specific references to respective patterns. And removed credits section from Home page. 2016-01-27 12:55:59 +05:30
Fix some markdown errors 2016-04-16 08:52:16 +03:00			`## Credits`
Fix minor display error 2016-04-15 08:13:51 +03:00
Work on #226, moved pattern specific references to respective patterns. And removed credits section from Home page. 2016-01-27 12:55:59 +05:30			`* [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2)`