/interpreter/tags/at2dist170907/src/edu/vub/at/actors/net/OBJNetwork.java
Java | 87 lines | 26 code | 9 blank | 52 comment | 0 complexity | 76d99a6d8e5085ab316872d7e9c09a33 MD5 | raw file
1/** 2 * AmbientTalk/2 Project 3 * OBJNetwork.java created on 24-feb-2007 at 17:38:31 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.net; 29 30import edu.vub.at.actors.natives.ELVirtualMachine; 31import edu.vub.at.exceptions.InterpreterException; 32import edu.vub.at.objects.ATNil; 33import edu.vub.at.objects.ATObject; 34import edu.vub.at.objects.natives.NATByCopy; 35import edu.vub.at.objects.natives.OBJNil; 36import edu.vub.at.objects.natives.NATText; 37 38/** 39 * This class represents the singleton network object which 40 * provides methods to interface with AT/2's distribution layer. 41 * 42 * @author tvcutsem 43 */ 44public final class OBJNetwork extends NATByCopy { 45 46 /** 47 * The singleton instance of the network object 48 */ 49 static public final OBJNetwork _INSTANCE_ = new OBJNetwork(); 50 51 /** 52 * Constructor made private for singleton design pattern 53 */ 54 private OBJNetwork() { } 55 56 /** 57 * def online() { make the interpreter go online; return nil } 58 * After invoking this method, publications and subscriptions can interact 59 * with those of remote VMs. 60 */ 61 public ATNil base_online() { 62 ELVirtualMachine.currentVM().event_goOnline(); 63 return OBJNil._INSTANCE_; 64 } 65 66 /** 67 * def offline() { make the interpreter go offline; return nil } 68 * Invoking this method causes remote references to become disconnected. 69 * 70 */ 71 public ATNil base_offline() { 72 ELVirtualMachine.currentVM().event_goOffline(); 73 return OBJNil._INSTANCE_; 74 } 75 76 /** 77 * After deserialization, ensure that the network object remains unique. 78 */ 79 public ATObject meta_resolve() throws InterpreterException { 80 return OBJNetwork._INSTANCE_; 81 } 82 83 public NATText meta_print() throws InterpreterException { 84 return NATText.atValue("<native object: network>"); 85 } 86 87}