java-design-patterns/tls

title, category, language, tag

title	category	language	tag
Thread Local Storage	Idiom	en	Performance

Intent

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.

Class diagram

Applicability

Use the Thread Local Storage in any of the following situations

• When you use class variables in your Callable / Runnable object that are not read-only and you use the same Callable instance in more than one thread running in parallel.
• When you use static variables in your Callable / Runnable object that are not read-only and more than one instances of the Callable / Runnable may run in parallel threads.