/interpreter/tags/at2dist041108/src/edu/vub/at/actors/eventloops/Future.java
Java | 58 lines | 6 code | 5 blank | 47 comment | 0 complexity | e5eeba4b72fffdf590157a275cf76e9c MD5 | raw file
1/** 2 * AmbientTalk/2 Project 3 * Future.java created on 27-dec-2006 at 15:57:34 4 * (c) Programming Technology Lab, 2006 - 2007 5 * Authors: Tom Van Cutsem & Stijn Mostinckx 6 * 7 * Permission is hereby granted, free of charge, to any person 8 * obtaining a copy of this software and associated documentation 9 * files (the "Software"), to deal in the Software without 10 * restriction, including without limitation the rights to use, 11 * copy, modify, merge, publish, distribute, sublicense, and/or 12 * sell copies of the Software, and to permit persons to whom the 13 * Software is furnished to do so, subject to the following 14 * conditions: 15 * 16 * The above copyright notice and this permission notice shall be 17 * included in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 21 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 23 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 24 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 26 * OTHER DEALINGS IN THE SOFTWARE. 27 */ 28package edu.vub.at.actors.eventloops; 29 30/** 31 * A future is a placeholder for a 'return value' that is not yet computed. 32 * 33 * A future can either be resolved into a value or it can be ruined by an exception. 34 * 35 * @author tvcutsem 36 */ 37public interface Future { 38 39 /** 40 * Used to resolve the future into the given result object. 41 * This will notify any threads waiting for the value. 42 */ 43 public void resolve(Object result); 44 45 /** 46 * Used to ruin the future with the given exception. 47 * This will notify any threads waiting for the value. 48 */ 49 public void ruin(Exception exception); 50 51 /** 52 * Used to retrieve the real value from the future. 53 * @return the resolved value of the future, once it is available. 54 * @throws Exception if the future has been ruined with an exception. 55 */ 56 public Object get() throws Exception; 57 58}