/*
 * WhileTrueTest.java
 *
 * This source file is part of the FoundationDB open source project
 *
 * Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.apple.foundationdb.test;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.atomic.AtomicInteger;

import com.apple.foundationdb.async.AsyncUtil;

public class WhileTrueTest {
	public static void main(String[] args) {
		// This should cause memory issues using the old implementation but not the new one.
		// Pro tip: Run with options -Xms16m -Xmx16m -XX:+HeadDumpOnOutOfMemoryError
		AtomicInteger count = new AtomicInteger(1000000);
		AsyncUtil.whileTrue(() -> CompletableFuture.completedFuture(count.decrementAndGet()).thenApplyAsync(c -> c > 0)).join();
		System.out.println("Final value: " + count.get());
	}

	private WhileTrueTest() {}
}
