AtomicBigInteger.java

package org.microspace.table;

import java.math.BigInteger;
import java.util.concurrent.atomic.AtomicReference;

/**
 * An atomic counter.
 * @author Gaspar Sinai - {@literal gaspar.sinai@microspace.org}
 * @version 2016-06-26
 */
public class AtomicBigInteger {
	
	private final AtomicReference<BigInteger> valueHolder = new AtomicReference<>();

    public AtomicBigInteger(BigInteger bigInteger) {
        valueHolder.set(bigInteger);
    }

    public BigInteger incrementAndGet() {
        for (; ; ) {
            BigInteger current = valueHolder.get();
            BigInteger next = current.add(BigInteger.ONE);
            if (valueHolder.compareAndSet(current, next)) {
                return next;
            }
        }
    }
    
    public BigInteger get() {
    	return valueHolder.get();
    }
    
    public void set(BigInteger value) {
    	valueHolder.set(value);
    }
    
}