Annotation of java/classes/org/w3c/jigsaw/servlet/JigsawHttpSessionContext.java, revision 1.12
1.1 bmahe 1: // JigsawHttpSessionContext.java
1.12 ! bmahe 2: // $Id: JigsawHttpSessionContext.java,v 1.11 1999/03/17 18:01:01 bmahe Exp $
1.1 bmahe 3: // (c) COPYRIGHT MIT and INRIA, 1998.
4: // Please first read the full copyright statement in file COPYRIGHT.html
5:
6: package org.w3c.jigsaw.servlet;
7:
8: import java.io.*;
9: import javax.servlet.*;
10: import javax.servlet.http.*;
11: import java.net.*;
12: import java.util.*;
13:
1.9 bmahe 14: import org.w3c.util.*;
15: import org.w3c.jigsaw.http.*;
16:
1.1 bmahe 17: /**
1.12 ! bmahe 18: * @version $Revision: 1.11 $
1.1 bmahe 19: * @author Benoît Mahé (bmahe@w3.org)
1.11 bmahe 20: * @deprecated since jsdk2.1
1.1 bmahe 21: */
1.9 bmahe 22: public class JigsawHttpSessionContext implements HttpSessionContext,
23: PropertyMonitoring
24: {
1.4 bmahe 25:
26: class SessionSweeper extends Thread {
27:
1.8 bmahe 28: int delay;
1.4 bmahe 29: JigsawHttpSessionContext ctxt = null;
30:
31: public void run() {
32: while (true) {
33: try {
1.7 bmahe 34: sleep(delay);
1.4 bmahe 35: } catch (InterruptedException ex) {}
36: ctxt.sweepSession();
37: }
38: }
39:
1.9 bmahe 40: void setDelay(int delay) {
41: this.delay = delay;
42: }
43:
1.7 bmahe 44: SessionSweeper(JigsawHttpSessionContext ctxt, int delay) {
1.4 bmahe 45: super("SessionSweeper");
1.7 bmahe 46: this.delay = delay;
1.4 bmahe 47: this.ctxt = ctxt;
48: setPriority(Thread.MIN_PRIORITY);
49: setDaemon(true);
50: this.start();
51: }
52:
53: }
54:
1.1 bmahe 55: private Hashtable sessions;
56: private int sessionNb = 0;
1.3 bmahe 57: private int sessionCount = 0;
1.8 bmahe 58: private int maxsession;
59: private long maxidle;
1.3 bmahe 60: private JigsawHttpSession oldestIdleSession = null;
1.9 bmahe 61: private SessionSweeper sweeper = null;
62: private ServletProps props = null;
63:
64: /**
65: * PropertyMonitoring implementation.
66: */
67: public boolean propertyChanged (String name) {
68: if (name.equals(ServletProps.SERVLET_SESSION_IDLE)) {
69: this.maxidle = props.getSessionsMaxIdleTime();
70: } else if (name.equals(ServletProps.SERVLET_MAX_SESSION)) {
71: this.maxsession = props.getMaxSessionsNumber();
72: } else if (name.equals(ServletProps.SERVLET_SESSION_SWEEP)) {
73: sweeper.setDelay(props.getSessionsSweepDelay());
74: }
75: return true;
76: }
1.3 bmahe 77:
1.9 bmahe 78: /**
79: * Remove sessions with idle time > max idle time
80: */
1.4 bmahe 81: protected synchronized void sweepSession() {
1.3 bmahe 82: long now = System.currentTimeMillis();
83: Enumeration enum = sessions.keys();
1.4 bmahe 84: oldestIdleSession = null;
1.3 bmahe 85: while (enum.hasMoreElements()) {
86: JigsawHttpSession session =
87: (JigsawHttpSession) sessions.get(enum.nextElement());
1.11 bmahe 88: long interval = now - session.getLastAccessedTime();
1.12 ! bmahe 89: System.out.println("Idle since : "+interval);
! 90: int maxinactiveinterval = session.getMaxInactiveInterval()*1000;
! 91: System.out.println("Max inactive interval : "+maxinactiveinterval);
1.11 bmahe 92: long maxinterval =
93: (maxinactiveinterval > 0) ? maxinactiveinterval : maxidle;
1.12 ! bmahe 94: System.out.println("Max interval : "+maxinterval);
1.11 bmahe 95: if (interval > maxinterval)
1.3 bmahe 96: session.invalidate();
97: else {
98: if (oldestIdleSession != null) {
99: if (oldestIdleSession.getLastAccessedTime() >
100: session.getLastAccessedTime())
101: oldestIdleSession = session;
102: } else {
103: oldestIdleSession = session;
104: }
105: }
106: }
107: }
108:
1.4 bmahe 109: protected synchronized void removeOldestIdleSession() {
1.3 bmahe 110: if (oldestIdleSession != null) {
111: oldestIdleSession.invalidate();
112: oldestIdleSession = null;
113: }
114: }
1.1 bmahe 115:
1.10 bmahe 116: /**
117: * Returns an enumeration of all of the session IDs in this context.
118: * @return an enumeration of all session IDs in this context.
1.11 bmahe 119: * @deprecated since jsdk2.1
1.10 bmahe 120: */
1.1 bmahe 121: public Enumeration getIds()
122: {
123: return sessions.keys();
124: }
125:
1.10 bmahe 126: /**
127: * Returns the session bound to the specified session ID.
128: * @param sessionID - the ID of a particular session object
129: * @return the session. Returns null if the session ID does
130: * not refer to a valid session.
1.11 bmahe 131: * @deprecated since jsdk2.1
1.10 bmahe 132: */
1.1 bmahe 133: public HttpSession getSession(String sessionId) {
134: return (HttpSession)sessions.get(sessionId);
135: }
136:
1.10 bmahe 137: /**
138: * Add a session in this context.
139: * @param session - The JigsawHttpSession to add.
140: * @return The session ID.
141: */
142: protected synchronized String addSession(JigsawHttpSession session) {
1.3 bmahe 143: if (sessionCount >= maxsession)
144: removeOldestIdleSession();
1.1 bmahe 145: String id = getNewSessionId();
146: sessions.put(id, session);
1.3 bmahe 147: sessionCount++;
1.1 bmahe 148: return id;
149: }
150:
1.10 bmahe 151: /**
152: * Remove a session of this session context.
153: * @param id - The session ID.
154: */
155: protected void removeSession(String id) {
1.1 bmahe 156: sessions.remove(id);
1.3 bmahe 157: sessionCount--;
1.1 bmahe 158: }
159:
1.10 bmahe 160: private String getNewSessionId() {
1.2 bmahe 161: return "J"+String.valueOf(new Date().hashCode())+"-"+(sessionNb++);
1.1 bmahe 162: }
163:
1.9 bmahe 164: public JigsawHttpSessionContext(httpd server, ServletProps props)
1.7 bmahe 165: {
1.9 bmahe 166: this.props = props;
1.3 bmahe 167: this.sessions = new Hashtable(3);
1.9 bmahe 168: this.maxidle = props.getSessionsMaxIdleTime();
169: this.maxsession = props.getMaxSessionsNumber();
170: this.sweeper = new SessionSweeper(this, props.getSessionsSweepDelay());
171: server.getProperties().registerObserver(this);
1.1 bmahe 172: }
173:
174: }
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