Kas saaks selgitada, mida mõistetakse atomaarsete operatsioonide või tehingute kontseptsiooni all?

An atomic operation or transaction is an operation that is performed entirely or not at all, without intermediate states visible to other threads or processes. In the context of multithreading and databases, this guarantees data integrity and prevents race conditions.

For example, in Java, atomic operations can be implemented using classes from the java.util.concurrent.atomic package, such as AtomicInteger, which provide increment, decrement, and compare-and-swap operations without locks.

Example of an atomic increment:

import java.util.concurrent.atomic.AtomicInteger;

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

In databases, a transaction is a set of operations executed as a single unit according to the ACID principles (atomicity, consistency, isolation, durability). If one operation fails, all changes are rolled back.