1 /* SimpleSessionContext.java -- memory-only session store. 2 Copyright (C) 2006 Free Software Foundation, Inc. 3 4 This file is a 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 of the License, or (at 9 your option) 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; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 19 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.javax.net.ssl.provider; 40 41 import gnu.javax.net.ssl.AbstractSessionContext; 42 import gnu.javax.net.ssl.Session; 43 import gnu.javax.net.ssl.SessionStoreException; 44 import java.util.Enumeration; 45 import java.util.HashMap; 46 import java.util.Iterator; 47 import java.util.Map; 48 49 /** 50 * A simple, non-persistent SessionContext. 51 * 52 * @author csm 53 */ 54 public final class SimpleSessionContext 55 extends AbstractSessionContext 56 { 57 /** 58 * By default, sessions last for 5 minutes. 59 */ 60 public static final int DEFAULT_TIMEOUT = 300; 61 62 private final HashMap<Session.ID, Session> store; 63 private int storeLimit; 64 SimpleSessionContext()65 public SimpleSessionContext() 66 { 67 super(DEFAULT_TIMEOUT); 68 storeLimit = 0; 69 store = new HashMap<Session.ID, Session>(); 70 } 71 72 @Override implGet(byte[] sessionId)73 protected Session implGet(byte[] sessionId) 74 { 75 return store.get(new Session.ID(sessionId)); 76 } 77 78 @Override load(char[] password)79 public void load(char[] password) throws SessionStoreException 80 { 81 // Not supported. Memory-only. 82 } 83 84 @Override put(Session session)85 public void put(Session session) 86 { 87 if (storeLimit > 0 && store.size() >= storeLimit) 88 { 89 Session oldest = null; 90 for (Map.Entry<Session.ID, Session> e : store.entrySet()) 91 { 92 Session s = e.getValue(); 93 long stamp = s.getLastAccessedTime(); 94 if (oldest == null || oldest.getLastAccessedTime() > stamp) 95 oldest = s; 96 } 97 store.remove(oldest.id()); 98 } 99 store.put(session.id(), session); 100 } 101 102 @Override remove(byte[] sessionId)103 public void remove(byte[] sessionId) 104 { 105 store.remove(new Session.ID(sessionId)); 106 } 107 108 @Override store(char[] password)109 public void store(char[] password) throws SessionStoreException 110 { 111 // Not supported. Memory-only. 112 } 113 getIds()114 public Enumeration getIds() 115 { 116 return new Enumeration() 117 { 118 Iterator<Session.ID> it = store.keySet().iterator(); 119 120 public boolean hasMoreElements() 121 { 122 return it.hasNext(); 123 } 124 125 public Object nextElement() 126 { 127 return it.next().id(); 128 } 129 }; 130 } 131 getSessionCacheSize()132 public int getSessionCacheSize() 133 { 134 return storeLimit; 135 } 136 setSessionCacheSize(int size)137 public void setSessionCacheSize(int size) 138 { 139 if (size < 0) 140 throw new IllegalArgumentException("cache size must be nonnegative"); 141 this.storeLimit = size; 142 } 143 144 } 145