2017-04-16 06:51:10 +01:00
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---
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layout: pattern
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title: Data Bus
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folder: data-bus
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permalink: /patterns/data-bus/
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categories: Architectural
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2021-05-19 10:49:05 -06:00
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language: en
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2017-04-16 06:51:10 +01:00
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tags:
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2019-12-13 21:09:28 +02:00
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- Decoupling
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2017-03-05 12:15:59 +00:00
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---
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## Intent
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2017-03-05 19:43:57 +00:00
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Allows send of messages/events between components of an application
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without them needing to know about each other. They only need to know
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about the type of the message/event being sent.
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2019-12-07 20:01:13 +02:00
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## Class diagram
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2017-03-05 19:43:57 +00:00
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2017-03-05 12:15:59 +00:00
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## Applicability
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2017-03-05 19:43:57 +00:00
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Use Data Bus pattern when
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2017-03-05 12:15:59 +00:00
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2017-03-05 19:43:57 +00:00
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* you want your components to decide themselves which messages/events they want to receive
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* you want to have many-to-many communication
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* you want your components to know nothing about each other
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2017-03-05 12:15:59 +00:00
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2017-03-05 19:43:57 +00:00
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## Related Patterns
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Data Bus is similar to
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2017-03-05 12:15:59 +00:00
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2017-03-05 19:43:57 +00:00
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* Mediator pattern with Data Bus Members deciding for themselves if they want to accept any given message
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* Observer pattern but supporting many-to-many communication
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* Publish/Subscribe pattern with the Data Bus decoupling the publisher and the subscriber
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