package com.winterbe.java8.samples.concurrent;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.locks.StampedLock;
/**
* @author Benjamin Winterberg
*/
public class Lock5 {
public static void main(String[] args) {
ExecutorService executor = Executors.newFixedThreadPool(2);
StampedLock lock = new StampedLock();
executor.submit(() -> {
long stamp = lock.tryOptimisticRead();
try {
System.out.println("Optimistic Lock Valid: " + lock.validate(stamp));
ConcurrentUtils.sleep(1);
System.out.println("Optimistic Lock Valid: " + lock.validate(stamp));
ConcurrentUtils.sleep(2);
System.out.println("Optimistic Lock Valid: " + lock.validate(stamp));
} finally {
lock.unlock(stamp);
}
});
executor.submit(() -> {
long stamp = lock.writeLock();
try {
System.out.println("Write Lock acquired");
ConcurrentUtils.sleep(2);
} finally {
lock.unlock(stamp);
System.out.println("Write done");
}
});
ConcurrentUtils.stop(executor);
}
}