Why is it necessary to use atomic variables if all access to the controller occurs in a single-threaded mode?

Even if all interactions with the controller occur in a single-threaded mode, using atomic variables may be necessary to ensure data correctness in cases where:

• The controller may be used in a multi-threaded environment in the future.
• There are asynchronous operations that can change the state outside the main thread.
• It is required to guarantee the atomicity of read/write operations to avoid partial updates.

Atomic variables provide operations that are performed as a single indivisible action, preventing race conditions and ensuring data consistency.

Example of using AtomicInteger:

AtomicInteger counter = new AtomicInteger(0);
counter.incrementAndGet(); // atomic increment by 1