????? ???? Amazon?? ? ?? ??? ??? ????. Medium?? ?? ????? ??? ???? ?? ?? ???. ?????! ??? ??? ??? ?????!

Java? ????? ??? ???? ?? ??????? ???? ?? ??? ??? ?????. ????? ??? ? ?? ? ???? ? ?? 5?? ?? ??? ?? ???????.

??? ??? ?? ?? ?? ????? ??? ?? ?????? ??? ??? ????. java.util.concurrent.atomic ???? ???? ???? ??? ?? ?????? ??? ?? ????? ??? ????? ??? ? ????. ?? ?? ???????.

import java.util.concurrent.atomic.AtomicInteger;

public class AtomicCounter {
    private AtomicInteger count = new AtomicInteger(0);

    public void increment() {
        count.incrementAndGet();
    }

    public int get() {
        return count.get();
    }
}

? AtomicCounter ???? AtomicInteger? ???? ???? ??? ?? ?????? ??? ??? ?????. incrementAndGet() ???? ? ?? ???? ???? ????? ????? ? ?? ?????.

??? ?? ????? ???? ????? ? ?? ??? ?????. ThreadLocal? ???? ?? ???? ??? ??? ???? ?? ??? ???? ??? ??? ??? ???? ? ????. ?? ??? ????.

public class ThreadLocalExample {
    private static final ThreadLocal<SimpleDateFormat> dateFormatter = new ThreadLocal<SimpleDateFormat>() {
        @Override
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("yyyy-MM-dd");
        }
    };

    public String formatDate(Date date) {
        return dateFormatter.get().format(date);
    }
}

? ???? ??? ?? SimpleDateFormat ????? ?????. ? ???? ?? ??? ???? ????? ?? ??? ??? ? ???? ??? ????.

Executor ?????? ???? ??? ??? ?? ??? ?????. ExecutorService? ???? ??? ????? ??? ???? ?? ????? ????? ??? ?? ?? ??? ??? ? ????. ?? ??? ????.

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ExecutorExample {
    public static void main(String[] args) {
        ExecutorService executor = Executors.newFixedThreadPool(5);

        for (int i = 0; i < 10; i++) {
            Runnable worker = new WorkerThread("" + i);
            executor.execute(worker);
        }

        executor.shutdown();
        while (!executor.isTerminated()) {
        }
        System.out.println("All tasks completed");
    }
}

class WorkerThread implements Runnable {
    private String command;

    public WorkerThread(String s) {
        this.command = s;
    }

    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName() + " Start. Command = " + command);
        processCommand();
        System.out.println(Thread.currentThread().getName() + " End.");
    }

    private void processCommand() {
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

? ???? 5?? ???? ?? ?? ??? ?? ??? ??? 10?? ??? ?????. ExecutorService? ??? ????? ?? ??? ????? ?????.

Phaser ???? ?? ?? ?? ?? ???? ???? ? ?? ??? ?? ??? ?????. ???? ???? ???? ?? ??? ??? ??????. ?? ??? ????.

import java.util.concurrent.Phaser;

public class PhaserExample {
    public static void main(String[] args) {
        Phaser phaser = new Phaser(1); // "1" to register self

        // Create and start 3 threads
        for (int i = 0; i < 3; i++) {
            new Thread(new PhaserWorker(phaser)).start();
        }

        // Wait for all threads to complete phase 1
        phaser.arriveAndAwaitAdvance();
        System.out.println("Phase 1 Complete");

        // Wait for all threads to complete phase 2
        phaser.arriveAndAwaitAdvance();
        System.out.println("Phase 2 Complete");

        phaser.arriveAndDeregister();
    }
}

class PhaserWorker implements Runnable {
    private final Phaser phaser;

    PhaserWorker(Phaser phaser) {
        this.phaser = phaser;
        this.phaser.register();
    }

    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName() + " beginning Phase 1");
        phaser.arriveAndAwaitAdvance();

        System.out.println(Thread.currentThread().getName() + " beginning Phase 2");
        phaser.arriveAndAwaitAdvance();

        phaser.arriveAndDeregister();
    }
}

? ???? Phaser? ???? ? ?? ?? ??? ?? ? ?? ???? ?????. ? ???? ???? ???? ? ??? ?? ??? ??? ?? ??? ?????.

StampedLock? ??? ?? ??? ???? ?? ?? ??????, ????? ??? ???? ?? ???? ????? ??????. ?? ??? ????.

import java.util.concurrent.locks.StampedLock;

public class StampedLockExample {
    private double x, y;
    private final StampedLock sl = new StampedLock();

    void move(double deltaX, double deltaY) {
        long stamp = sl.writeLock();
        try {
            x += deltaX;
            y += deltaY;
        } finally {
            sl.unlockWrite(stamp);
        }
    }

    double distanceFromOrigin() {
        long stamp = sl.tryOptimisticRead();
        double currentX = x, currentY = y;
        if (!sl.validate(stamp)) {
            stamp = sl.readLock();
            try {
                currentX = x;
                currentY = y;
            } finally {
                sl.unlockRead(stamp);
            }
        }
        return Math.sqrt(currentX * currentX + currentY * currentY);
    }
}

? ???? StampedLock? ???? x ? y ??? ?? ???? ?????. move ???? ?? ??? ???? ??, distanceFromOrigin? ??? ??? ????, ??? ??? ???? ?? ?? ???? ?????.

??? ?? ????? ??? Java ????? ???, ??? ? ???? ??? ??????? ??? ? ?? ??? ??? ?????. ??? ??? ?????? ??? ?? ?????? ??? ?? ?? ????? ??? ? ????. ??? ?? ????? ???? ???? ?? ???? ???? ??? ???? ??? ??? ?? ? ????.

Executor ?????? ??? ??? ????? ??? ????? ??? ??? ???? ??? ? ?? ????. ? ?? ??? ?? ?? ??? ????? ???? ?? ?????? ?? ?????.

Phaser? ??? ?? ??? ?? ?? ???? ???? ?? ??? ??? ????? ?????. ?? ???? ??? ??? ?? ???? ??? ? ?? ?????? ?? ?????.

StampedLock? ??? ?? ?????? ??? ?? ???? ? ?? ??? ?? ??? ?????. ??? ???? ?? ?? ?? ??? ??? ??? ? ??? ???? ?? ???? ???? ?? ?? ? ????.

??? ??? ??? ?? ??????? ?? ?? ??? ??? ???? ?? ?????. ??? ?? ??? ??? ?? ???? ? ??? ???? ?????. ??? ??? ???? ?? ??????? ??????? ?? ??? ???? ?? ?????.

?? ?? ??? ??? ??? ?? ??????? ?? ??? ?????. ??? ?? ??????? ????? ?? ??? ??? ??? ??? ? ?? ??? ??? ? ????. ????? StampedLock? ??? ?? ??? ??? ? ??? ??? ReentrantReadWriteLock?? ???? ???? ?? ? ?????.

Executor ?????? ??? ?? ??????? ??? ??? ? ??? ???? ?????. ???? ?? ??? ??? ???? ??? ???? ?? ? ???, ???? ?? ??? ???? ??? ????? ??? ??? ? ????.

??? ?? ???? ????? ??? ???? ?????. ? ????? ??? ?? ??? ?? ???? ???? ??? ???? ??? ??? ??? ??? ? ????.

Phaser? ??? ? ??? ?? ???? ??? ??? ???? ??? ?? ??? ??? ? ??? ?? ?????. ??? ?? ???? ??? ????? ?? ???? ???? ??? ?????.

??? ??? ??? ? ???? ?? ???? ???? ?? ?? ???. ?? ??? ????? ???? ? ???, ??? ???? ?? ??? ??? ???? ? ??? ???. ??? ???? ?? jcstress? ?? ??? ??? ???.

??? ?? ????? ??? ??? ?? ????? ?? ??? Java ??????? ?? ? ??? ?? ?? ?????. ??? ???? ??? ??? ??? ?????. ??? ??? ???? ????? ???? ????. ?? ?????? ???? ??? ????? ??? ???? ?? ? ????.

?? ??? ?? ??? ???? ? ??? ??? ?? ?? ??? ??? ?????. ???? ?? ???? ????? ??? ?? ?? ??? ? ?? ?? ??? ??????. ??? ??? ??/?? ??? ??? ?? ?? ????? ??? ???? ??? ??? ???? ?? ???? ? ?????.

??? ??? ? ?? ???? ?? ??? ?????? ?? ???? ?? ?? ??? ???? ??? ? ?? ??? ?? ??????????. ??? Phaser ???? ???? ??? ??? ???? ? ?? ??? ?? ??? ???? ?? ?? ??? ???? ? ??? ????. ? ?? ??? ???? ?? ????? ???? ?? ???? ?? ? ?????.

????? ??? 5?? ?? ????? ??(??? ??? ??? ?? ?? ????, ??? ?? ????, ??? ?????, ??? ???? ?? Phaser ? ??? ??? ?? StampedLock)? ??? ?? Java ??????? ???? ?? ??? ??? ?????. ??? ??? ???? ???? ???? ????? ??? ??? ???? ?? ???? ? ????.

??? ? ??? ? ??? ???? ?? ??????. ??? ?? ??? ???? ????? ??? ??? ??? ???? ?????. ???? ???? ???? ?? ??? ?? ? ??? ?? ??????? ???? ????????.

??? ??? ?? ???? ???? ?? ????? ??? ?? ?? ????? ?? ? ?? ??? ?? ? ????. ??? ??? ??? ?? ???? Java ???? ??? ? ?? ??? ?? ?? ? ??? ?? ?????? ??? ? ?? ??? ???? ?????.

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101?

101 Books? ?? Aarav Joshi? ?? ??? AI ?? ??????. ?? AI ??? ???? ?? ??? ?? ? ?? ??? ?? ?????. ?? ??? ??? $4?? ???? ?? ??? ??? ??? ??? ? ????.

????? ?? ? ?? Golang Clean Code ?? ??? ???.

????? ???? ??? ?? ??? ??? ????. ?? ??? ? Aarav Joshi? ??? ? ?? ?? ?????. ??? ??? ???? ????? ?????!

??? ???

?? ???? ? ??? ???.

???? ??? | ??? ?? ???? | ?? ?? ??? | ????? | ??? ??? | ????? ???? | ???? | ??? ??? | JS ??

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??? ??? ????

?? ??? ???? | Epochs & Echoes World | ??????? | ???? ???? ?? | ??? ??? ?? | ?? ????

? ??? ??? ??????? ?? ?? Java ????? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!