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Ilkka Seppälä committed 2024-05-26 15:30:54 +03:00
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---
title: Notification title: Notification
category: Behavioral category: Behavioral
language: en language: en
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## Explanation ## Explanation
Real world example Real-world example
> Consider a weather alert system as a real-world analogous example of the Notification design pattern. In this system, a weather station collects data on weather conditions like temperature, humidity, and storm alerts. Multiple subscribers, such as news agencies, smartphone weather apps, and emergency services, are interested in receiving updates about specific weather events, like severe storms or extreme temperatures. > Consider a weather alert system as a real-world analogous example of the Notification design pattern. In this system, a weather station collects data on weather conditions like temperature, humidity, and storm alerts. Multiple subscribers, such as news agencies, smartphone weather apps, and emergency services, are interested in receiving updates about specific weather events, like severe storms or extreme temperatures.
> >
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18:10:00.080 [main] INFO com.iluwatar.RegisterWorkerForm - Not registered, see errors 18:10:00.080 [main] INFO com.iluwatar.RegisterWorkerForm - Not registered, see errors
``` ```
## Class diagram
![Notification](./etc/notification.urm.png "Notification")
## Applicability ## Applicability
* When a change to one object requires changing others, and you don’t know how many objects need to be changed. * When a change to one object requires changing others, and you don’t know how many objects need to be changed.
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## Credits ## Credits
* [Martin Fowler - Notification Pattern](https://martinfowler.com/eaaDev/Notification.html)
* [Design Patterns: Elements of Reusable Object-Oriented Software](https://amzn.to/3w0pvKI) * [Design Patterns: Elements of Reusable Object-Oriented Software](https://amzn.to/3w0pvKI)
* [Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions](https://amzn.to/3WcFVui) * [Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions](https://amzn.to/3WcFVui)
* [Notification Pattern (Martin Fowler)](https://martinfowler.com/eaaDev/Notification.html)