package com.winterbe.java8.samples.concurrent;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.LongAdder;
import java.util.stream.IntStream;
/**
* @author Benjamin Winterberg
*/
public class LongAdder1 {
private static final int NUM_INCREMENTS = 10000;
private static LongAdder adder = new LongAdder();
public static void main(String[] args) {
testIncrement();
testAdd();
}
private static void testAdd() {
ExecutorService executor = Executors.newFixedThreadPool(2);
IntStream.range(0, NUM_INCREMENTS)
.forEach(i -> executor.submit(() -> adder.add(2)));
ConcurrentUtils.stop(executor);
System.out.format("Add: %d\n", adder.sumThenReset());
}
private static void testIncrement() {
ExecutorService executor = Executors.newFixedThreadPool(2);
IntStream.range(0, NUM_INCREMENTS)
.forEach(i -> executor.submit(adder::increment));
ConcurrentUtils.stop(executor);
System.out.format("Increment: Expected=%d; Is=%d\n", NUM_INCREMENTS, adder.sumThenReset());
}
}