This week's book giveaway is in the Python forum.
We're giving away four copies of High Performance Python for Data Analytics and have Tiago Rodrigues Antao on-line!
See this thread for details.
Win a copy of High Performance Python for Data Analytics this week in the Python forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Paul Clapham
  • Ron McLeod
  • Bear Bibeault
  • Liutauras Vilda
Sheriffs:
  • Jeanne Boyarsky
  • Tim Cooke
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Tim Holloway
  • Stephan van Hulst
  • Jj Roberts
  • Carey Brown
Bartenders:
  • salvin francis
  • Frits Walraven
  • Piet Souris

When to use ThreadLocal in Java, thread-safety example

 
Ranch Hand
Posts: 300
Eclipse IDE Firefox Browser Linux
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
ThreadLocal variable is another way of achieving thread-safety in Java. If a class, which is important but not thread-safe and at same time very expensive to create, it make lot of sense to only have limited number of instance of that variable and using ThreadLocal concept to share them between multiple threads. In this article, I have used ThreadLocal variables to provide thread-safety to SimpleDateFormat class. As most of Java programmer knows that SimpleDateFormat is not thread-safe and same time very expensive to create locally, by carefully wrapping them inside ThreadLocal can provide best of both world. By the way be careful, while using ThreadLocal variable in manged environment like J2EE web and application server. Reckless use of ThreadLocal variable can create memory leak in Java web application. For example, storing an object loaded by web app classloader in ThreadLocal, may prevent that class and subsequently that classloader from being Garbage collected, which can create a memory leak in container.
 
Don't get me started about those stupid light bulbs.
reply
    Bookmark Topic Watch Topic
  • New Topic