poison-pill/README.md

---
layout: pattern
title: Poison Pill
folder: poison-pill
permalink: /patterns/poison-pill/
categories: Behavioral
tags:
 - Cloud distributed
 - Reactive
---

## Intent
Poison Pill is known predefined data item that allows to provide
graceful shutdown for separate distributed consumption process.

## Class diagram
![alt text](./etc/poison-pill.png "Poison Pill")

## Applicability
Use the Poison Pill idiom when

* Need to send signal from one thread/process to another to terminate

## Real world examples

* [akka.actor.PoisonPill](http://doc.akka.io/docs/akka/2.1.4/java/untyped-actors.html)
Work towards #56 : Splitting up the README 2015-08-13 23:54:40 +02:00			`---`
			`layout: pattern`
			`title: Poison Pill`
			`folder: poison-pill`
Work towards #56 : Add permalink to every pattern 2015-08-15 18:03:05 +02:00			`permalink: /patterns/poison-pill/`
https://github.com/iluwatar/java-design-patterns-web/issues/8 Update pattern categories and tags 2019-12-13 21:09:28 +02:00			`categories: Behavioral`
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			`- Cloud distributed`
Adjust pattern categories and tags 2016-07-21 09:27:48 +03:00			`- Reactive`
Work towards #56 : Splitting up the README 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`
			`Poison Pill is known predefined data item that allows to provide`
Work towards #56 : Splitting up the README 2015-08-13 23:54:40 +02:00			`graceful shutdown for separate distributed consumption process.`

#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 2015-08-13 23:54:40 +02:00			`![alt text](./etc/poison-pill.png "Poison Pill")`

Use headings instead of bold text in index.md #238 2016-01-03 21:14:30 +01:00			`## Applicability`
			`Use the Poison Pill idiom when`
Work towards #56 : Splitting up the README 2015-08-13 23:54:40 +02:00
https://github.com/iluwatar/java-design-patterns-web/issues/8 Update pattern categories and tags 2019-12-13 21:09:28 +02:00			`* Need to send signal from one thread/process to another to terminate`
Work towards #56 : Splitting up the README 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			`## Real world examples`
Work towards #56 : Splitting up the README 2015-08-13 23:54:40 +02:00
Work towards #56 : Add permalink to every pattern 2015-08-15 18:03:05 +02:00			`* [akka.actor.PoisonPill](http://doc.akka.io/docs/akka/2.1.4/java/untyped-actors.html)`