What was Worker? How does it work?

In the context of Java, the term "Worker" often refers to a separate thread or task that performs some work asynchronously or in the background. Usually, a Worker is an object implementing the Runnable or Callable interface, which is started in a separate thread or through a thread pool (ExecutorService).

Working principle:

• The Worker receives a task to perform.
• It is launched in a separate thread.
• It performs its work (e.g., data processing, calculations).
• Upon completion, it can return a result or signal completion.

Example of a simple Worker in Java:

public class Worker implements Runnable {
    private String taskName;

    public Worker(String taskName) {
        this.taskName = taskName;
    }

    @Override
    public void run() {
        System.out.println("Executing task: " + taskName);
        // Work logic here
    }
}

// Usage:
ExecutorService executor = Executors.newFixedThreadPool(2);
executor.submit(new Worker("Task 1"));
executor.shutdown();

Thus, a Worker is a unit of work executed in a separate thread, enabling parallel task processing.