java-design-patterns/eip-message-channel/README.md

---
layout: pattern
title: EIP Message Channel
folder: eip-message-channel
permalink: /patterns/eip-message-channel/
categories: Integration
language: en
tags:
 - Enterprise Integration Pattern
---

## Intent
When two applications communicate using a messaging system they do it by using logical addresses
of the system, so called Message Channels.

## Class diagram
![alt text](./etc/message-channel.png "Message Channel")

## Applicability
Use the Message Channel pattern when

* two or more applications need to communicate using a messaging system

## Real world examples

* [akka-camel](http://doc.akka.io/docs/akka/snapshot/scala/camel.html)
* [Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions](https://www.amazon.com/gp/product/0321200683/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0321200683&linkCode=as2&tag=javadesignpat-20&linkId=122e0cff74eedd004cc81a3ecfa623cf)
#143 Added pattern description to index.md 2015-08-22 19:43:21 +03:00			`---`
			`layout: pattern`
Consistent naming for EIP patterns #733 2018-04-12 15:24:57 +03:00			`title: EIP Message Channel`
			`folder: eip-message-channel`
			`permalink: /patterns/eip-message-channel/`
#143 Added pattern description to index.md 2015-08-22 19:43:21 +03:00			`categories: Integration`
fix: Fixed pages showing up in wrong language (#1752) * Fix languages * Missed change for version number * Add language field for presentation * Revert change in README for double buffer Co-authored-by: Jackie Nim <=> 2021-05-19 10:49:05 -06:00			`language: en`
Work on #190: urm/puml updates * added pumlid where it was missing and possible * removed pumlid where it generated a bad image * regenerated some incorrect puml's * added 'left to right direction' puml prefix to some diagrams to improve the automatic layouting 2017-03-25 22:07:10 +01:00			`tags:`
https://github.com/iluwatar/java-design-patterns-web/issues/8 Update pattern categories and tags 2019-12-13 21:09:28 +02:00			`- Enterprise Integration Pattern`
#143 Added pattern description to index.md 2015-08-22 19:43:21 +03:00			`---`

Use headings instead of bold text in index.md #238 2016-01-03 21:14:30 +01:00			`## Intent`
			`When two applications communicate using a messaging system they do it by using logical addresses`
#143 Added pattern description to index.md 2015-08-22 19:43:21 +03:00			`of the system, so called Message Channels.`

#1113 Link uml-reverse-mapper created class diagrams to readme, where needed 2019-12-07 20:01:13 +02:00			`## Class diagram`
#143 Added pattern description to index.md 2015-08-22 19:43:21 +03:00			`![alt text](./etc/message-channel.png "Message Channel")`

Use headings instead of bold text in index.md #238 2016-01-03 21:14:30 +01:00			`## Applicability`
			`Use the Message Channel pattern when`
#143 Added pattern description to index.md 2015-08-22 19:43:21 +03:00
			`* two or more applications need to communicate using a messaging system`
#143 Added real world example 2015-09-02 21:51:14 +03:00
Use headings instead of bold text in index.md #238 2016-01-03 21:14:30 +01:00			`## Real world examples`
#143 Added real world example 2015-09-02 21:51:14 +03:00
Work on #190: urm/puml updates * added pumlid where it was missing and possible * removed pumlid where it generated a bad image * regenerated some incorrect puml's * added 'left to right direction' puml prefix to some diagrams to improve the automatic layouting 2017-03-25 22:07:10 +01:00			`* [akka-camel](http://doc.akka.io/docs/akka/snapshot/scala/camel.html)`
Add references to Enterprise Integration Patterns 2020-07-07 21:23:04 +03:00			`* [Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions](https://www.amazon.com/gp/product/0321200683/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0321200683&linkCode=as2&tag=javadesignpat-20&linkId=122e0cff74eedd004cc81a3ecfa623cf)`