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added Poison Pill idiom

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vehpsr
2015-04-05 18:03:16 +03:00
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@@ -71,7 +71,7 @@ A programming idiom is a means of expressing a recurring construct in one or mor
* [Execute Around](#execute-around)
* [Double Checked Locking](#double-checked-locking)
* [Poison Pill](#poison-pill)
## <a name="abstract-factory">Abstract Factory</a> [&#8593;](#list-of-design-patterns)
@@ -475,6 +475,13 @@ A programming idiom is a means of expressing a recurring construct in one or mor
**Real world examples:**
* [JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Inheritance_and_the_prototype_chain) prototype inheritance
## <a name="poison-pill">Poison Pill</a> [&#8593;](#list-of-design-patterns)
**Intent:** Poison Pill is known predefined data item that allows to provide graceful shutdown for separate distributed consumption process.
![alt text](https://github.com/iluwatar/java-design-patterns/blob/master/poison-pill/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
# Frequently asked questions