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1: /* SocketRepository.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; 40: 41: import java.net.Socket; 42: import java.net.SocketException; 43: import java.util.HashMap; 44: import java.util.Iterator; 45: import java.util.Map; 46: 47: /** 48: * This class caches the opened sockets that are reused during the 49: * frequent calls. Otherwise, some CORBA applications may spend 50: * up to 90 % of the working time just for closing and opening the sockets. 51: * 52: * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) 53: */ 54: public class SocketRepository 55: { 56: /** 57: * The socket map. 58: */ 59: private static HashMap sockets = new HashMap(); 60: 61: /** 62: * Put a socket. This method also discards all not reusable sockets from 63: * the map. 64: * 65: * @param key as socket key. 66: * 67: * @param s a socket. 68: */ 69: public static void put_socket(Object key, Socket s) 70: { 71: synchronized (sockets) 72: { 73: sockets.put(key, s); 74: gc(); 75: } 76: } 77: 78: /** 79: * Removes all non reusable sockets. As it is private, 80: * we know we call from the synchronized code already. 81: */ 82: private static void gc() 83: { 84: Iterator iter = sockets.entrySet().iterator(); 85: 86: Map.Entry e; 87: Socket sx; 88: 89: while (iter.hasNext()) 90: { 91: e = (Map.Entry) iter.next(); 92: sx = (Socket) e.getValue(); 93: 94: if (not_reusable(sx)) 95: iter.remove(); 96: } 97: } 98: 99: /** 100: * Return true if the socket is no longer reusable. 101: */ 102: static boolean not_reusable(Socket s) 103: { 104: return (s.isClosed() || !s.isBound() || !s.isConnected() || 105: s.isInputShutdown() || s.isOutputShutdown()); 106: } 107: 108: /** 109: * Get a socket. 110: * 111: * @param key a socket key. 112: * 113: * @return an opened socket for reuse, null if no such available or it is 114: * closed, its input or output has been shutown or otherwise the socket is not 115: * reuseable. 116: */ 117: public static Socket get_socket(Object key) 118: { 119: if (true) 120: return null; 121: 122: synchronized (sockets) 123: { 124: Socket s = (Socket) sockets.get(key); 125: if (s == null) 126: return null; 127: 128: // Ensure that the socket is fully reusable. 129: else if (not_reusable(s)) 130: { 131: sockets.remove(key); 132: return null; 133: } 134: else 135: { 136: try 137: { 138: // Set one minute time out that will be changed later. 139: s.setSoTimeout(60 * 1000); 140: } 141: catch (SocketException e) 142: { 143: s = null; 144: } 145: 146: sockets.remove(key); 147: return s; 148: } 149: } 150: }