How to implement reading data without blocking the execution of operations?

To read data without blocking operations in Java, non-blocking data structures and asynchronous approaches are often used. For example, classes from the java.util.concurrent package, such as ConcurrentHashMap, allow reading and writing data without locks.

You can also use asynchronous programming with CompletableFuture or reactive libraries (e.g., Reactor or RxJava) to perform read operations in a separate thread and not block the main execution thread.

Example of using ConcurrentHashMap:

import java.util.concurrent.ConcurrentHashMap;

ConcurrentHashMap<String, String> map = new ConcurrentHashMap<>();
map.put("key", "value");

// Non-blocking read
String value = map.get("key");

Thus, reading occurs without blocking, even if write operations are happening simultaneously.