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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 gnu.javax.net.ssl.Session.ID; 45: 46: import java.util.Enumeration; 47: import java.util.HashMap; 48: import java.util.Iterator; 49: import java.util.Map; 50: 51: /** 52: * A simple, non-persistent SessionContext. 53: * 54: * @author csm 55: */ 56: public final class SimpleSessionContext 57: extends AbstractSessionContext 58: { 59: /** 60: * By default, sessions last for 5 minutes. 61: */ 62: public static final int DEFAULT_TIMEOUT = 300; 63: 64: private final HashMap<Session.ID, Session> store; 65: private int storeLimit; 66: 67: public SimpleSessionContext() 68: { 69: super(DEFAULT_TIMEOUT); 70: storeLimit = 0; 71: store = new HashMap<Session.ID, Session>(); 72: } 73: 74: @Override 75: protected Session implGet(byte[] sessionId) 76: { 77: return store.get(new Session.ID(sessionId)); 78: } 79: 80: @Override 81: public void load(char[] password) throws SessionStoreException 82: { 83: // Not supported. Memory-only. 84: } 85: 86: @Override 87: public void put(Session session) 88: { 89: if (storeLimit > 0 && store.size() >= storeLimit) 90: { 91: Session oldest = null; 92: for (Map.Entry<Session.ID, Session> e : store.entrySet()) 93: { 94: Session s = e.getValue(); 95: long stamp = s.getLastAccessedTime(); 96: if (oldest == null || oldest.getLastAccessedTime() > stamp) 97: oldest = s; 98: } 99: store.remove(oldest.id()); 100: } 101: store.put(session.id(), session); 102: } 103: 104: @Override 105: public void remove(byte[] sessionId) 106: { 107: store.remove(new Session.ID(sessionId)); 108: } 109: 110: @Override 111: public void store(char[] password) throws SessionStoreException 112: { 113: // Not supported. Memory-only. 114: } 115: 116: public Enumeration getIds() 117: { 118: return new Enumeration() 119: { 120: Iterator<Session.ID> it = store.keySet().iterator(); 121: 122: public boolean hasMoreElements() 123: { 124: return it.hasNext(); 125: } 126: 127: public Object nextElement() 128: { 129: return it.next().id(); 130: } 131: }; 132: } 133: 134: public int getSessionCacheSize() 135: { 136: return storeLimit; 137: } 138: 139: public void setSessionCacheSize(int size) 140: { 141: if (size < 0) 142: throw new IllegalArgumentException("cache size must be nonnegative"); 143: this.storeLimit = size; 144: } 145: 146: }