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}