We can use the following Java Wrapper for Lock so that we can Try-With-Resources to Auto Close the Lock:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | public final class ALock implements AutoCloseable { private final Lock lock; public ALock(Lock l) { this.lock = l; } public final ALock lock() { this.lock.lock(); return this; } public final void close() { this.lock.unlock(); } } |
public final class ALock implements AutoCloseable {
private final Lock lock;
public ALock(Lock l) {
this.lock = l;
}
public final ALock lock() {
this.lock.lock();
return this;
}
public final void close() {
this.lock.unlock();
}
}For example, we can do this:
1 2 3 4 5 6 7 8 9 10 11 12 13 | package helloacm.com public class LockWrapperTesting { public static void main(String[] args) { var value = 1.0; var lock = new ReentrantLock(); var wLock = new ALock(lock); try (var l = wLock.lock()) { value ++; System.out.println("Hello " + value); } } } |
package helloacm.com
public class LockWrapperTesting {
public static void main(String[] args) {
var value = 1.0;
var lock = new ReentrantLock();
var wLock = new ALock(lock);
try (var l = wLock.lock()) {
value ++;
System.out.println("Hello " + value);
}
}
}This Java code prints “Hello 2.0” to the console. We use a ReentrantLock to enter the critical code block where we increment the value.
The Lock will be automatically unlocked after the try {} block.
–EOF (The Ultimate Computing & Technology Blog) —
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