23 lines
862 B
Markdown
23 lines
862 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 against being spoiled by other threads. That is needed if you use class variables or static variables in your Callable object or Runnable object that are not read-only.
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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 / Runnalbe 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 / Runnable object that are not read-only and more than one instances of the Callable / Runnalbe may run in parallel threads.
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