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package com.jit.test;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;
public class AttemptLocking {
private ReentrantLock lock = new ReentrantLock();
public void untimed() {
boolean captured = lock.tryLock();
try {
System.out.println("tryLock(): " + captured);
} finally {
if (captured)
lock.unlock();
}
}
public void timed() {
boolean captured = false;
try {
captured = lock.tryLock(2, TimeUnit.SECONDS);
} catch (InterruptedException e) {
throw new RuntimeException();
}
try {
System.out.println("tryLock(2,TimeUnit.SECONDS): " + captured);
} finally {
if (captured)
lock.unlock();
}
}
public static void main(String[] args) {
final AttemptLocking al = new AttemptLocking();
al.untimed();
al.timed();
new Thread() {
{
setDaemon(true);
}
public void run() {
al.lock.lock();
System.out.println("Acquired");
}
}.start();
Thread.yield();
al.untimed();
al.timed();
}
}