001/*
002 * Trident - A Multithreaded Server Alternative
003 * Copyright 2014 The TridentSDK Team
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *    http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package net.tridentsdk.concurrent;
018
019import java.util.concurrent.CountDownLatch;
020
021/**
022 * Utility to wait until a task completes before continuing in the current thread
023 *
024 * @author The TridentSDK Team
025 */
026public class Joiner {
027    private final CountDownLatch waiter = new CountDownLatch(1);
028
029    /**
030     * Joins the thread and signals the single waiter to continue
031     */
032    public void doJoin() {
033        waiter.countDown();
034    }
035
036    /**
037     * Awaits a subsequent join call
038     */
039    public void await() {
040        try {
041            waiter.await();
042        } catch (InterruptedException e) {
043            e.printStackTrace();
044        }
045    }
046}