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package ru.javawebinar.basejava;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.concurrent.*;

import java.util.concurrent.atomic.AtomicInteger;

import java.util.concurrent.locks.Lock;

import java.util.concurrent.locks.ReentrantReadWriteLock;

/**

* gkislin

* 29.08.2016

*/

public class MainConcurrency {

public static final int THREADS_NUMBER = 10000;

private int counter;

private final AtomicInteger atomicCounter = new AtomicInteger();

// private static final Object LOCK = new Object();

// private static final Lock lock = new ReentrantLock();

private static final ReentrantReadWriteLock reentrantReadWriteLock = new ReentrantReadWriteLock();

private static final Lock WRITE_LOCK = reentrantReadWriteLock.writeLock();

private static final Lock READ_LOCK = reentrantReadWriteLock.readLock();

private static final ThreadLocal<SimpleDateFormat> threadLocal = new ThreadLocal<SimpleDateFormat>() {

@Override

protected SimpleDateFormat initialValue() {

return new SimpleDateFormat();

}

};

public static void main(String[] args) throws InterruptedException {

System.out.println(Thread.currentThread().getName());

Thread thread0 = new Thread() {

@Override

public void run() {

System.out.println(getName() + ", " + getState());

// throw new IllegalStateException();

}

};

thread0.start();

new Thread(new Runnable() {

@Override

public void run() {

System.out.println(Thread.currentThread().getName() + ", " + Thread.currentThread().getState());

}

private void inc() {

synchronized (this) {

// counter++;

}

}

}).start();

System.out.println(thread0.getState());

final MainConcurrency mainConcurrency = new MainConcurrency();

CountDownLatch latch = new CountDownLatch(THREADS_NUMBER);

ExecutorService executorService = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());

// CompletionService completionService = new ExecutorCompletionService(executorService);

//

// List<Thread> threads = new ArrayList<>(THREADS_NUMBER);

for (int i = 0; i < THREADS_NUMBER; i++) {

Future<Integer> future = executorService.submit(() ->

// Thread thread = new Thread(() ->

{

for (int j = 0; j < 100; j++) {

mainConcurrency.inc();

System.out.println(threadLocal.get().format(new Date()));

}

latch.countDown();

return 5;

});

// thread.start();

// threads.add(thread);

}

/*

threads.forEach(t -> {

try {

t.join();

} catch (InterruptedException e) {

e.printStackTrace();

}

});

*/

latch.await(10, TimeUnit.SECONDS);

executorService.shutdown();

// System.out.println(mainConcurrency.counter);

System.out.println(mainConcurrency.atomicCounter.get());

// final String lock1 = "lock1";

// final String lock2 = "lock2";

// deadLock(lock1, lock2);

// deadLock(lock2, lock1);

}

private static void deadLock(Object lock1, Object lock2) {

new Thread(() -> {

System.out.println("Waiting " + lock1);

synchronized (lock1) {

System.out.println("Holding " + lock1);

try {

Thread.sleep(50);

} catch (InterruptedException e) {

e.printStackTrace();

}

System.out.println("Waiting " + lock2);

synchronized (lock2) {

System.out.println("Holding " + lock2);

}

}

}).start();

}

private void inc() {

// synchronized (this) {

// synchronized (MainConcurrency.class) {

// WRITE_LOCK.lock();

// try {

atomicCounter.incrementAndGet();

// counter++;

// } finally {

// WRITE_LOCK.unlock();

// }

// wait();

// readFile

// ...

// }

}

}