24 lines
791 B
Markdown
24 lines
791 B
Markdown
---
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layout: pattern
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title: Thread Local Storage
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folder: tls
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permalink: /patterns/tls/
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pumlid:
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categories: Concurrency
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tags:
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- Java
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- Difficulty-Intermediate
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---
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## Intent
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Securing variables global to a thread, i.e. class variables if a Callable object,
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against being spoiled by other threads using the same instance of the Callable object
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## Applicability
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Use the Thread Local Storage in any of the following situations
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* when you use class variables in your Callable Object that are not read-only and you use the same Callable instance in more than one thread running in parallel
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* when you use static variables in your Callable Object that are not read-only and more than one instances of the Callable may run in parallel threads.
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