1 /* gnuPoaCurrent.java -- 2 Copyright (C) 2005 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package gnu.CORBA.Poa; 40 41 import org.omg.CORBA.CurrentHelper; 42 import org.omg.CORBA.portable.ObjectImpl; 43 import org.omg.PortableServer.Current; 44 import org.omg.PortableServer.CurrentOperations; 45 import org.omg.PortableServer.CurrentPackage.NoContext; 46 import org.omg.PortableServer.POA; 47 48 import java.util.Iterator; 49 import java.util.Map; 50 import java.util.TreeMap; 51 52 /** 53 * Supports the "Poa current" concept, providing the id and poa of 54 * the object currently being served. There is only one instance 55 * of this class per ORB. It maintains a thread to information map. 56 * 57 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 58 */ 59 public class gnuPoaCurrent 60 extends ObjectImpl 61 implements Current 62 { 63 /** 64 * The table, mapping threads to records. 65 */ 66 private TreeMap threads = new TreeMap(); 67 68 /** 69 * Get the array of POA current repository ids. 70 * 71 * @return a single member array, containing value, returned 72 * by the {@link CurrentHelper#id}, normally 73 * "IDL:omg.org/PortableServer/Current:2.3". 74 */ _ids()75 public String[] _ids() 76 { 77 return new String[] { CurrentHelper.id() }; 78 } 79 80 /** 81 * Get the object id, associated with the thread currently being served. 82 * 83 * @throws NoContext if the current thread is not associated with any 84 * object. 85 */ get_object_id()86 public byte[] get_object_id() 87 throws NoContext 88 { 89 CurrentOperations r; 90 synchronized (threads) 91 { 92 r = (CurrentOperations) threads.get(Thread.currentThread().getName()); 93 } 94 if (r != null) 95 return r.get_object_id(); 96 else 97 throw new NoContext(Thread.currentThread().getName()); 98 } 99 100 /** 101 * Get the object POA, associated with the thread currently being served. 102 * 103 * @throws NoContext if the current thread is not associated with any 104 * object. 105 */ get_POA()106 public POA get_POA() 107 throws NoContext 108 { 109 CurrentOperations r; 110 synchronized (threads) 111 { 112 r = (CurrentOperations) threads.get(Thread.currentThread().getName()); 113 } 114 if (r != null) 115 return r.get_POA(); 116 else 117 throw new NoContext(Thread.currentThread().getName()); 118 } 119 120 /** 121 * Add the entry to the map. 122 */ put(Thread t, CurrentOperations record)123 public void put(Thread t, CurrentOperations record) 124 { 125 synchronized (threads) 126 { 127 threads.put(t.getName(), record); 128 } 129 } 130 131 /** 132 * Check if this Poa has some running threads. 133 */ has(POA poa)134 public boolean has(POA poa) 135 { 136 synchronized (threads) 137 { 138 Iterator iter = threads.entrySet().iterator(); 139 while (iter.hasNext()) 140 { 141 Map.Entry item = (Map.Entry) iter.next(); 142 try 143 { 144 if (((CurrentOperations) item.getValue()).get_POA() == poa) 145 { 146 return true; 147 } 148 } 149 catch (NoContext ex) 150 { 151 throw new InternalError(); 152 } 153 } 154 } 155 return false; 156 } 157 158 /** 159 * Check if this thread is registered. 160 */ has(Thread t)161 public boolean has(Thread t) 162 { 163 synchronized (threads) 164 { 165 return threads.containsKey(t.getName()); 166 } 167 } 168 169 /** 170 * Remove the entry from the map. 171 */ remove(Thread t)172 public void remove(Thread t) 173 { 174 synchronized (threads) 175 { 176 threads.remove(t.getName()); 177 } 178 } 179 } 180