thread-confinement – Tarik Billa

Thread Confinement

June 2, 2023 by Tarik

So when an object is confined to a thread, no other thread can have access to it? No, it’s the other way around: if you ensure that no other thread has access to an object, then that object is said to be confined to a single thread. There’s no language- or JVM-level mechanism that confines … Read more

When and how should I use a ThreadLocal variable?

September 6, 2022 by Tarik

One possible (and common) use is when you have some object that is not thread-safe, but you want to avoid synchronizing access to that object (I’m looking at you, SimpleDateFormat). Instead, give each thread its own instance of the object. For example: public class Foo { // SimpleDateFormat is not thread-safe, so give one to … Read more