iluwatar
Implement Thread-Specific Storage Pattern
Description
Thread-Specific Storage is a concurrency design pattern where each thread retains its own instance of a shared object, typically achieved using ThreadLocal<T> in Java. By isolating data to each thread, you avoid synchronization overhead and minimize concurrency issues. Common use cases include storing thread-specific contexts, caching stateful objects like DateFormat, or managing per-thread counters without risking data corruption or race conditions.
Key Elements
- Isolation of State: Each thread has its own copy of the data, reducing shared mutable state.
-
ThreadLocal Utility: Java’s
ThreadLocal<T>class provides a straightforward way to store data private to each thread. - Initialization & Cleanup: Properly initializing and cleaning up thread-local data is crucial to prevent memory leaks.
- Practical Use Cases: Storing per-thread data such as locale-specific formatters, current transaction context, or local caches.
References
- Pattern-Oriented Software Architecture, Volume 2: Patterns for Concurrent and Networked Objects
- Java Design Patterns - Contribution Guidelines
Acceptance Criteria
- [ ] A new module or package named
thread-specific-storage(or similar) is added. - [ ] Demonstrates a clear use case of storing and retrieving thread-local data (e.g., per-thread state).
- [ ] Includes a readme (or
.mdfile) explaining how the pattern works, with code examples or diagrams. - [ ] Adheres to the repository’s coding style and naming conventions.
- [ ] Includes unit tests verifying behavior in a multi-threaded scenario.
- [ ] Passes all CI checks and meets the project’s contribution guidelines.
Hello @iluwatar .I would like to work on this .Could you assign it to me? It would be a great opportunity to learn!
Hey @iluwatar, I'm currently working on a thread-safety related topic in Java and am craving for some hands on practice. Feel free to assign me for this issue so I can start right away!
If there’s no objection, I’ll start implementing this now and submit a PR. 🚀
Is someone working on this already , No one is assigned yet. Else please assign it to me.
